CN109907211B - High-voltage electrostatic field generating device with fresh-keeping function and refrigerator - Google Patents
High-voltage electrostatic field generating device with fresh-keeping function and refrigerator Download PDFInfo
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- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
The invention discloses a high-voltage electrostatic field generating device with a fresh-keeping function and a refrigerator, wherein the high-voltage electrostatic field generating device with the fresh-keeping function comprises an inverter circuit for inverting safe direct-current voltage into high-voltage alternating-current voltage with a preset range and outputting the high-voltage alternating-current voltage; an oscillating circuit connected with the inverter circuit and used for generating sinusoidal alternating current signals with certain frequency and amplitude and forming vibration signals in space; a plurality of high-voltage electrodes connected to the oscillation circuit for generating ozone by applying low-frequency vibration; and the buck filter device is connected with the inverter circuit and used for carrying out buck filtering on the boosted alternating voltage. The invention uses an inverter circuit to invert a safe DC voltage, such as 12V, to an AC voltage of 1000-5000V. The safe direct current voltage input by the invention is for example 12V, the voltage is lower, the safe and reliable operation is realized, the power consumption is smaller, the energy and the electricity are saved, in addition, the direct current is used for high-frequency boost conversion efficiency, and the starting is fast.
Description
Technical Field
The invention relates to the technical field of refrigerators, in particular to a high-voltage electrostatic field generating device with a fresh-keeping function and a refrigerator.
Background
At present, only a single refrigerator is kept fresh by using an electric field, and the alternating voltage 220V is increased to 800-3000V by using a transformer and is transmitted to a discharge source through an output controller.
The existing electrostatic fresh-keeping refrigerator utilizes a transformer to increase the alternating voltage of 220V to 800-3000V, has larger input voltage and is easy to generate electric shock accidents. And the power consumption is high and the efficiency is low.
Accordingly, the prior art is still in need of improvement and development.
Disclosure of Invention
In view of the shortcomings of the prior art, the invention aims to provide a high-voltage electrostatic field generating device with a fresh-keeping function and a high-voltage electrostatic field fresh-keeping refrigerator generated by an inverter circuit, wherein the inverter circuit is used for inverting a safe direct-current voltage, for example, 12V into an alternating-current voltage of 1000-5000V, and the alternating-current voltage is output to a high-voltage electrode through an oscillating circuit; the high-voltage electrode is oscillated to generate ozone, so that the space potential generating device has the effect of deodorizing, and is more beneficial to food preservation; an electric field (energy field) with proper intensity can be generated in the refrigerator, so that the fresh-keeping effect of refrigerated, soft frozen and frozen foods is enhanced. The input safe direct-current voltage is, for example, 12V, and is low in voltage, safe, reliable, low in power consumption, energy-saving and electricity-saving, and high in direct-current boost conversion efficiency and quick in starting.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a high voltage electrostatic field generating device with fresh keeping function, comprising:
an inverter circuit for inverting the safe DC voltage into a high-voltage AC voltage output in a predetermined range;
An oscillating circuit connected with the inverter circuit and used for generating sinusoidal alternating current signals with certain frequency and amplitude and forming vibration signals in space;
a plurality of high-voltage electrodes connected to the oscillation circuit for generating ozone by applying low-frequency vibration;
the buck filter device is connected with the inverter circuit and used for carrying out buck filter on the boosted alternating voltage;
the power input end of the inverter circuit is connected with a power supply device for providing safe direct-current voltage, the output end of the inverter circuit is connected with the oscillating circuit, the output end of the oscillating circuit is connected with the high-voltage electrode, the step-down filter device is connected with the other end of the inverter circuit, and the step-down filter device is also connected with the ground wire.
The high-voltage electrostatic field generating device with the fresh-keeping function comprises an inverter circuit and a switching circuit consisting of a transformer and a MOSFET bridge circuit or a triode; the switching circuit formed by the MOSFET bridge circuit or the triode is used as a switch, and the transformer can realize boosting and can primarily convert square waves into triangular waves or sine waves.
The high-voltage electrostatic field generating device with the fresh-keeping function is characterized in that an all-aluminum shell is arranged on the outer side of the inverter circuit, the safe direct-current voltage is 8V-36V, and the high voltage in the preset range is 1000-5000V.
The high-voltage electrostatic field generating device with the fresh-keeping function comprises an amplifying circuit, a frequency-selecting network unit, a positive feedback network unit and a stable-amplitude link unit which are connected in sequence, wherein the oscillating circuit comprises a high-voltage electrostatic field generating device with the fresh-keeping function, a frequency-selecting network unit, a positive feedback network unit and a stable-amplitude link unit:
the amplifying circuit is used for ensuring that the circuit obtains output quantity with a certain amplitude in the process from starting vibration to dynamic balance, and realizes energy control;
The frequency-selecting network unit is used for determining the oscillation frequency of the circuit, so that the circuit generates oscillation with a single frequency, namely, the circuit is ensured to generate sine wave oscillation;
The positive feedback network is used for introducing positive feedback to enable an input signal of the amplifying circuit to be equal to a feedback signal;
the amplitude stabilizing link unit is used for stabilizing the amplitude of the output signal.
The high-voltage electrostatic field generating device with the fresh-keeping function is characterized in that the oscillating circuit is an RC sine wave oscillating circuit, an LC sine wave oscillating circuit or a quartz crystal sine wave oscillating circuit.
The high-voltage electrostatic field generating device with the fresh-keeping function is characterized in that the high-voltage electrode is a conductive plate, the conductive plate is made of a flexible copper plate, and the surface of the conductive plate is subjected to epoxy resin insulation treatment.
The high-voltage electrostatic field generating device with the fresh-keeping function, wherein the voltage of the high-voltage electrode is 1000-5000V, and the power is below 3W.
The high-voltage electrostatic field generating device with the fresh-keeping function comprises a voltage reducing module and a filtering module which are sequentially connected, wherein the voltage reducing module is a voltage reducing chip for realizing the voltage reducing function, and the filtering module is a filtering chip for realizing the filtering function.
The refrigerator with the fresh-keeping function comprises a refrigerator body and any one of the high-voltage electrostatic field generating devices with the fresh-keeping function, wherein the high-voltage electrostatic field generating devices are arranged in the refrigerator body.
The refrigerator with the fresh-keeping function comprises a refrigerator body, a refrigerating chamber, a freezing chamber and a compressor chamber, wherein the refrigerator body comprises a refrigerating chamber, a freezing chamber and a compressor chamber;
the high-voltage electrostatic field generating device is arranged in the refrigerating chamber, the freezing chamber and/or the compressor chamber, so that the refrigerator has a fresh-keeping function.
Compared with the prior art, the high-voltage electrostatic field generating device with the fresh-keeping function and the refrigerator provided by the invention have the advantages that the inverter circuit is used for inverting the safe direct-current voltage, for example, 12V into the alternating-current voltage of 1000-5000V, and the alternating-current voltage is output to the high-voltage electrode through the oscillating circuit; the high-voltage electrode is oscillated to generate ozone, so that the space potential generating device has the effect of deodorizing, and is more beneficial to food preservation; an electric field (energy field) with proper intensity can be generated in the refrigerator, so that the fresh-keeping effect of refrigerated, soft frozen and frozen foods is enhanced. The safe direct current voltage input by the invention is for example 12V, the voltage is lower, the safe and reliable operation is realized, the power consumption is smaller, the energy and the electricity are saved, in addition, the direct current is used for high-frequency boost conversion efficiency, and the starting is fast. The inverter circuit has good safety performance and has the protection functions of short circuit, overload, over/under voltage, over temperature and the like. The inverter circuit adopted by the invention has good physical performance, adopts an all-aluminum shell, has good heat dissipation performance, has good friction resistance after surface hard oxidation treatment, and can resist extrusion or impact of certain external force; the load adaptability and stability are strong.
The invention has the following advantages:
1) The depolarization effect caused by the high-voltage electrostatic field changes the membrane potential difference of the fruit and vegetable cells, thereby slowing down the physiological process of cell metabolism and further reducing the respiration intensity and delaying the aging.
2) The high-voltage electrostatic field can ionize air to generate ion mist and a certain amount of ozone, wherein negative ions have the effects of inhibiting metabolism of fruits and vegetables, reducing the respiration intensity of fruits and vegetables, slowing down the activity of enzymes and the like, so that the life cycle is prolonged, the effect of keeping fresh is correspondingly achieved, a large amount of negative ions can charge neutral dust originally, then the effect of electrostatic dust removal is achieved under the action of the electrostatic field, the air at a storage place is purified, carriers for spreading microorganisms can be greatly reduced, and the corrosion rate is inhibited; ozone has a certain bactericidal effect, can react with ethylene, ethanol, acetaldehyde and the like released by fruits and vegetables to generate CO2 and water, inhibits the mature aging of the picked fruits and vegetables, achieves a certain fresh-keeping effect, and is a strong oxidant, has a strong bactericidal effect, and can cause bacteria and toxic bacteria in the air to lose vitality.
3) The high voltage electrostatic field can change the enzyme activity of the aquatic product and slow down the fat oxidation and protein decomposition rate.
4) The electric field in the refrigerator penetrates through the whole food, on one hand, the change of the water molecule combination mode is promoted, the growth trend of ice crystals can be restrained, the nucleation size of the ice crystals is controlled, the ice crystals formed by frozen food are smaller and more round, and unidirectional sharp ice crystals are not easy to form (the generation of sharp ice crystals is avoided to destroy cell structures); on the other hand, the method is favorable for soft freezing and accelerating frozen food to pass through an ice crystal belt in the freezing and thawing processes, thereby ensuring that the cell tissues of the food are not destroyed, reducing the weight loss of blood and the loss of nutrient components and being favorable for keeping the fresh state of the food.
5) The refrigerator can realize freezing-free refrigeration below the freezing point of meat seafood in the range of-3-0 ℃, can be taken out of the refrigerator at any time for processing, and can effectively prevent color change.
Drawings
FIG. 1 is a functional block diagram of a preferred embodiment of a high voltage electrostatic field generator with freshness keeping function according to the present invention.
Fig. 2 is a circuit diagram of a first preferred embodiment of an inverter circuit of a high-voltage electrostatic field generator with a fresh-keeping function according to the present invention.
Fig. 3 is a circuit diagram of a second preferred embodiment of the inverter circuit of the high-voltage electrostatic field generating device with a fresh-keeping function according to the present invention.
Fig. 4 is a diagram of an RC sine wave oscillator circuit according to a first preferred embodiment of the present invention, which provides an oscillator circuit of a high voltage electrostatic field generator with a fresh keeping function.
Fig. 5 is a diagram of an LC sine wave oscillator circuit according to a second preferred embodiment of the present invention, which provides an oscillator circuit of a high voltage electrostatic field generator with a fresh keeping function.
Fig. 6 is a diagram of a third preferred embodiment of a quartz crystal sine wave oscillator circuit of the high-voltage electrostatic field generator with fresh-keeping function according to the present invention.
Fig. 7 is a block diagram of a refrigerator with a fresh keeping function according to the present invention.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and more specific, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The embodiment of the invention provides a high-voltage electrostatic field generating device with a fresh-keeping function, which comprises the following components:
An inverter circuit 1 for inverting a safe direct-current voltage (e.g., 12V) into a high-voltage (e.g., 1000V-5000V) alternating-current voltage output of a predetermined range;
an oscillation circuit 2 connected to the inverter circuit 1 for generating a sinusoidal alternating current signal of a certain frequency and amplitude, forming a vibration signal in space;
A plurality of high-voltage electrodes (3 and 4) connected to the oscillation circuit 2 for generating ozone by applying low-frequency vibration;
A step-down filter device 5 connected to the inverter circuit 1 for step-down filtering the boosted ac voltage;
the power input end of the inverter circuit 1 is connected with a power supply device for providing safe direct current voltage (12V safe direct current voltage is adopted in the embodiment), the output end of the inverter circuit 1 is connected with the oscillating circuit 2, the output end of the oscillating circuit 2 is connected with a high-voltage electrode (a first high-voltage electrode 3 and a second high-voltage electrode 4), a step-down filter device is connected with the other end of the inverter circuit, and the step-down filter device is also connected with a ground wire.
As shown in fig. 1, the high-voltage electrostatic field generating device with the fresh-keeping function according to the present embodiment includes: inverter circuit 1, oscillating circuit 2, first high voltage electrode 3, second high voltage electrode 4 and step-down filter device 5.
The power input end of the inverter circuit 1 is connected with a power supply device for providing safe direct-current voltage, the output end of the inverter circuit 1 is respectively connected with the oscillating circuit 2 and the voltage reduction filter device 5, the output end of the oscillating circuit 2 is connected with the first high-voltage electrode 3 and the second high-voltage electrode 4, the voltage reduction filter device 5 is connected with the other end of the inverter circuit 1, and the voltage reduction filter device 5 is also connected with a ground wire.
The inverter circuit 1 is used for inverting the safe direct-current voltage into a high-voltage alternating-current voltage output with a preset range.
The oscillating circuit 2 is used for generating a sinusoidal alternating current signal of a certain frequency and amplitude, forming a vibration signal in space. The high-voltage electrode 3 and the high-voltage electrode 4 are used for generating ozone by applying low-frequency vibration.
In summary, the high-voltage electrostatic field generating device with the fresh-keeping function provided by the embodiment of the invention uses the inverter circuit 1 to invert the safe direct-current voltage, for example, 12V, into the alternating-current voltage of 1000-5000V, and outputs the alternating-current voltage to the high-voltage electrode through the oscillating circuit 2; the high-voltage electrode is oscillated to generate ozone, so that the space potential generating device has the effect of deodorizing, and is more beneficial to food preservation; an electric field (energy field) with proper intensity can be generated in the refrigerator, so that the fresh-keeping effect of refrigerated, soft frozen and frozen foods is enhanced. The safe direct current voltage input by the invention is for example 12V, the voltage is lower, the safe and reliable operation is realized, the power consumption is smaller, the energy and the electricity are saved, in addition, the direct current is used for high-frequency boost conversion efficiency, and the starting is fast. The inverter formed by the inverter circuit 1 has good safety performance and has the protection functions of short circuit, overload, overvoltage/undervoltage, overtemperature and the like.
Further, as shown in fig. 2 and 3, the inverter circuit 1 includes a switching circuit 10 composed of a transformer and a MOSFET bridge circuit 11 or a triode; the switching circuit 10, which is composed of a MOSFET bridge circuit 11 or a triode, is used as a switch, and the transformer realizes the boosting and can primarily convert square waves into triangular waves or sine waves.
Specifically, in the first preferred embodiment of the inverter circuit 1 of the present invention, the switching circuit 10 formed by the triode is connected with the transformer T1 to form the inverter circuit 1, as shown in fig. 2, the inverter circuit 1 includes the switching circuit 10 formed by the triode, the transformer T1 and the capacitor C2; the switching circuit 10 formed by the triodes includes an inductor L1, a resistor R2, a resistor R3, a resistor R4, a triode Q1, a triode Q2, a capacitor C1, a diode D1 and a field effect transistor VT1. The input end of the switching circuit 10 formed by the triodes is connected with 12V direct current voltage, and through the switching action of the triodes Q1 and Q2, the 12V direct current is boosted and converted into high-voltage alternating current finally, and as the input voltage of the inverter circuit 1 is 12V, the voltage is lower, the inverter circuit is safer and more reliable, has smaller power, saves energy and electricity, has high conversion efficiency and quick starting through high-frequency boosting by direct current, and has strong load adaptability and stability.
With continued reference to fig. 2, one end of the inductor L1 is connected to a 12V dc power supply and an output end of the diode D1, the other end of the inductor L1 is connected to a resistor R1, a resistor R2 and a third pin of the transformer T1, the resistor R1 is further connected to a base of the transistor Q1 and a fifth pin of the transformer T1, the resistor R2 is further connected to a base of the transistor Q2 and a first pin of the transformer T1, an emitter of the transistor Q1 is connected to an emitter of the transistor Q2, an input end of the diode D1 and a drain of the transistor VT1, a collector of the transistor Q1 is connected to one end of the capacitor C1 and a fourth pin of the transformer T1, a collector of the transistor Q2 is connected to the other end of the capacitor C1 and a second pin of the transformer T1, a gate of the transistor VT1 is connected to one end of the resistor R3 and one end of the resistor R4, a source of the transistor VT1 is connected to the other end of the resistor R4 and is grounded, and the other end of the transistor VT 3 is connected to a signal of the wd terminal; in addition, the seventh pin and the eighth pin of the transformer T1 are interconnected and connected with one end of the capacitor C2, the other end of the capacitor C2 is connected with the oscillating circuit 2, and the sixth pin of the transformer is connected between the drain of the field effect transistor VT1, the input end of the diode and the emitter of the triode Q2 of the triode Q1, and is connected with the step-down filter device 5.
In another embodiment, the MOSFET bridge circuit 11 and the transformer T2 form the inverter circuit 1. As shown in fig. 3, the inverter circuit 1 includes a MOSFET bridge circuit 11, a transformer T2, a resistor R11, and a capacitor C4; the MOSFET bridge circuit 11 includes an inductor L2, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a transistor Q3, a transistor Q4, a transistor Q5, a transistor Q6, a capacitor C3, and a diode D2. The input end of the MOSFET bridge circuit 11 is connected with 12V direct current voltage, and through the switching action of the triode Q3 and the triode Q4, the 12V direct current is boosted and converted into high-voltage alternating current finally, and as the input voltage of the inverter circuit 1 is 12V, the voltage is lower, the inverter circuit is safer and more reliable, has smaller power, saves energy and electricity, has high conversion efficiency and quick starting through high-frequency boosting by direct current, and has strong load adaptability and stability.
Specifically, please refer to fig. 3, one end of the inductor L2 is connected to a 12V safe dc power supply and an output end of the diode D2, the other end of the inductor L2 is connected to a resistor R5, a resistor R6 and a third pin of the transformer T2, the resistor R5 is further connected to a base of the triode Q3 and a fifth pin of the transformer T2, the resistor R6 is further connected to a base of the triode Q4 and a first pin of the transformer T2, an emitter of the triode Q3 is interconnected with an emitter of the triode Q4, an input end of the diode D2 and a collector of the triode Q5, a collector of the triode Q3 is connected to one end of the capacitor C3 and a fourth pin of the transformer T2, a collector of the triode Q4 is connected to the other end of the capacitor C3 and a second pin of the transformer T2, a base of the triode Q5 is connected to one end of the resistor R7 and one end of the resistor R8, an emitter of the triode Q5 is connected to the other end of the resistor R7 and the first pin of the resistor T2 and is grounded, an emitter of the triode Q6 is connected to the other end of the triode Q6 and the other end of the resistor Q6 is connected to the resistor Q10 and the other end of the resistor Q9; in addition, the seventh leg, the eighth leg, the ninth leg and the tenth leg of the transformer T2 are interconnected and connected to one end of the capacitor C4, the other end of the capacitor C4 is connected to the oscillating circuit 2, the sixth leg of the transformer is connected to one end of the resistor R11 and the step-down filter 5, and the other end of the resistor R11 is connected to the emitter of the triode Q5 and the other end of the resistor R7 and grounded.
Furthermore, the outside of the inverter circuit 1 is provided with an all-aluminum shell, so that the inverter circuit has good heat dissipation performance, the surface is subjected to hard oxidation treatment, and the inverter circuit has good friction resistance and can resist extrusion or impact of certain external force; the input voltage of the safe direct current voltage of 12V and 12V is in a safe range, so that the safe direct current voltage has good safety performance; in addition, the predetermined range of alternating high voltage is 1000V-5000V.
In summary, the invention converts square wave into triangular wave or sine wave through the transformer by accessing the safe direct current voltage of 12V, and controls the output alternating current voltage between 1000V and 5000V, and the invention is safe and reliable, has lower power consumption, saves energy and electricity because of lower input voltage; in addition, the direct current is boosted by high frequency to obtain high-voltage alternating current, the conversion efficiency is high, the starting is quick, the overload, short circuit, over/under voltage, temperature and the like of the circuit are detected in real time through the ZWD signal end, the circuit has a good circuit protection function, the outer side of the inverter circuit 1 is provided with an all-aluminum shell, the heat dissipation performance is good, the surface is subjected to hard oxidation treatment, the friction resistance is good, and the inverter circuit can resist extrusion or collision of a certain external force.
The oscillating circuit 2 comprises a frequency-selecting network unit, a positive feedback network unit, a stable amplitude link unit and an amplifying circuit which are connected in sequence:
The amplifying circuit is used for ensuring that the circuit obtains output quantity with a certain amplitude in the process from starting vibration to dynamic balance, and realizing energy control;
The frequency-selecting network unit is used for determining the oscillation frequency of the circuit, so that the circuit generates oscillation with a single frequency, namely, the circuit is ensured to generate sine wave oscillation;
The positive feedback network is used for introducing positive feedback to enable an input signal of the amplifying circuit to be equal to a feedback signal;
the amplitude stabilizing link unit is used for stabilizing the amplitude of the output signal.
In summary, the oscillating circuit 2 can generate a sinusoidal ac signal with a certain frequency amplitude. The oscillation circuit 2 generates vibration in the space, which is helpful to break the hydrogen bond between water molecules and rearrange the water molecules. Under the action of an electric field, water molecules are combined with molecules such as protein and carbohydrate to form combined water, so that the effect of protecting the protein and the carbohydrate is achieved; simultaneously, the activity of water is reduced, and the bacterial growth is inhibited; the high-voltage electrode is oscillated to generate ozone, so that the space potential generating device has the effect of deodorizing, and is more beneficial to food preservation.
Further, the oscillation circuit 2 is an RC sine wave oscillation circuit 2, an LC sine wave oscillation circuit 2, or a quartz crystal sine wave oscillation circuit 2.
For example, as shown in fig. 4, when the oscillating circuit 2 is an RC sine wave oscillating circuit 2, the RC sine wave oscillating circuit 2 includes a frequency selecting network unit 20, a positive feedback network unit 21, a constant amplitude link unit 22 and an operational amplifier, which are sequentially connected.
As shown in fig. 4, the frequency-selective network unit 20 includes a capacitor C5 and a resistor R12 connected in sequence, for selecting a signal with a single frequency.
The positive feedback network unit 21 is connected with the frequency-selecting network unit 20, and comprises a capacitor C6 and a resistor R13, wherein one ends of the capacitor C6 and the resistor R13 are connected with the capacitor C5 and the output end of the inverter circuit 1, and the other ends of the capacitor C6 and the resistor R13 are grounded.
Specifically, the frequency-selective network unit 20 causes a certain frequency in the internal noise to satisfy the phase balance condition, and forms positive feedback to become an output signal of the oscillating circuit.
As shown in fig. 4, the amplitude stabilizing unit 22 is connected to the frequency-selecting network unit 20 and the positive feedback network unit 21, and includes a resistor RF and a resistor R14 that are sequentially connected, where the resistor RF is further connected to the resistor R12, the resistor R14 is further connected to ground, and the amplitude stabilizing unit performs amplitude stabilizing through the resistor RF and a transistor in the amplifier.
The operational amplifier is connected with the amplitude stabilizing link, the high-voltage electrode 3 and the high-voltage electrode 4, amplifies the output signal output by the frequency selecting network of the amplitude stabilizing link unit 22 and the positive feedback network unit 21 to obtain a stable sine wave signal, and outputs the stable sine wave signal to the high-voltage electrode 3 and the high-voltage electrode 4.
In summary, in the embodiment of the present invention, the output signal of the oscillating circuit 2 is obtained by forming positive feedback through frequency selection by the frequency selection network and the positive feedback network, then the amplitude stabilizing unit 22 cooperates with the transistor in the operational amplifier to stabilize the amplitude, and then the operational amplifier amplifies and outputs the signal, so as to obtain the sine wave signal with a single frequency, and the oscillating frequency of the RC sine wave oscillating circuit 2 is lower, generally below 1 MHz.
Illustratively, as shown in fig. 5, when the oscillating circuit 2 is an LC sine wave oscillating circuit, the LC sine wave oscillating circuit includes an inductance L3, a capacitance C7, a capacitance C8, a resistance R15, a resistance R16, and an amplifier A2; the one end of inductance L3 and the one end of electric capacity C7 all are connected inverter circuit 1 output and resistance R15, the amplifier A2 is all connected to the other end of inductance L3 and the other end of electric capacity C7, resistance R15 still is connected with amplifier A2 and electric capacity C8, amplifier A2 still is connected with resistance R16, electric capacity C8 and electric capacity R16 all ground connection, follow the frequency selection network that inductance L3 and electric capacity C7 constitute and output sine wave signal to high-voltage electrode 3 and high-voltage electrode 4 between the amplifier.
In the embodiment of the invention, the inductance L3 and the capacitance C7 form a frequency selection network to form LC parallel resonance, the oscillation frequency of the circuit is determined, the circuit generates single-frequency oscillation, the circuit is ensured to generate sine wave oscillation, the sine wave signal is amplified by the amplifier T2, the circuit is ensured to obtain output quantity with a certain amplitude from the process of starting oscillation to dynamic balance, and the energy control is realized. The oscillation frequency of the LC sine wave oscillation circuit is higher and is generally more than 1 MHz.
Illustratively, as shown in fig. 6, when the oscillation circuit 2 is a quartz crystal sine wave oscillation circuit, the quartz crystal sine wave oscillation circuit includes a resistor R17, a six inverter integrated block A3, a capacitor C9, a capacitor C10, a capacitor C11, and a quartz crystal SJT. One end of the resistor R17 is connected with the first pin 1 of the six-inverter integrated block A3, the other end of the resistor R17 is connected with the second pin 2 of the six-inverter integrated block A3 and the capacitor C11, the first pin of the six-inverter integrated block A3 is also connected with one end of the quartz crystal SJT and one end of the capacitor C9, the quartz crystal SJT is also connected with the capacitor C10 and the second pin of the six-inverter integrated block A3, the capacitor C9 and the capacitor C10 are both grounded, and the capacitor C11 is connected with the high-voltage electrode 3 and the high-voltage electrode 4.
Specifically, the quartz crystal sine wave oscillation circuit is an inverting amplification circuit formed by a CMOS NOT gate and a resistor Rl in the six-inverter integrated block A3. The quartz crystal SJT forms a 7C type positive feedback branch with C9 and C10. The quartz crystal presents inductance near the natural resonant frequency, the inductance and the capacitors C9 and C10 form a resonant loop, a frequency-selecting phase-shifting feedback network is formed to feed back to the input end of the amplifier, oscillation is generated, and the adjustment capacitor C10 can finely adjust the oscillation frequency. The stability of the oscillation frequency of the crystal oscillator can be as high as 10 < -5 > or higher, and the crystal oscillator has the highest stability among several oscillating circuits.
The high-voltage electrode is a conductive plate, the conductive plate is made of flexible copper plates, the flexible copper plates are good in flexibility, the conductive plate can be arranged in foaming layers of the refrigerating chamber, the temperature-changing chamber and the freezing chamber back plate, the bottom foaming layer, the top foaming layer, the door body and the like, the conductive plate is bent and deformed at will according to requirements, the surface of the conductive plate is subjected to insulation treatment by using epoxy resin, the occurrence of the leakage phenomenon is avoided, and the thickness of the high-voltage electrode is 0.01-1 mm.
The voltage of the high-voltage electrode is 1000-5000V, the power is below 3W, and the safety and the practicability are high.
The voltage reduction filter device 5 comprises a voltage reduction module and a filter module which are sequentially connected, the voltage reduction module is a voltage reduction chip for realizing the voltage reduction function, and the filter module is a filter chip for realizing the filter function, and the impact of high-voltage current on the ground can be effectively reduced through the voltage reduction filter device 5; specifically, the embodiment of the invention introduces the redundant charges generated by the alternating voltage on the high-voltage electrostatic field generating device into the ground through the voltage reduction filter device 5, so that the damage to circuits and components caused by the impact of the redundant charges is avoided. Since the step-down filter device 5 and the step-down chip and the filter chip thereof are all of the prior art, there are various alternatives, and they will not be described in detail herein.
In summary, the high-voltage electrostatic field generating device with the fresh-keeping function in the invention converts the 12V safe direct-current voltage into the 1000V-5000V alternating-current voltage through the inverter circuit 1, and then the alternating-current voltage is subjected to high-frequency oscillation through the oscillating circuit 2 to generate sine wave signals with certain frequency and amplitude to the first high-voltage electrode 3 and the second high-voltage electrode 4, and the oscillating circuit 2 vibrates in space, so that hydrogen bonds among water molecules are broken, the water molecules are rearranged, and under the action of an electric field, the water molecules are combined with molecules such as protein and carbohydrate to form combined water, so that the effects of protecting the protein and the carbohydrate are achieved; meanwhile, the activity of water is reduced, bacterial growth is inhibited, and in addition, the high-voltage electrode 3 and the high-voltage electrode 4 are oscillated to generate ozone, so that the space potential generating device has the effect of deodorizing, and food preservation is facilitated.
Based on the high-voltage electrostatic field generating device with the fresh-keeping function, the invention also provides a refrigerator with the fresh-keeping function, as shown in fig. 7, the refrigerator with the fresh-keeping function comprises a refrigerator body 100, and the high-voltage electrostatic field generating device 200 with the fresh-keeping function, wherein the high-voltage electrostatic field generating device 200 is arranged in the refrigerator body 100.
The refrigerator body includes a refrigerating compartment 101, a freezing compartment 102, and a compressor compartment 103;
The high-voltage electrostatic field generating device 200 provides the refrigerator with a fresh-keeping function in the refrigerating chamber 101, the freezing chamber 102 and/or the compressor chamber 103.
Illustratively, the high-voltage electrodes may be disposed in any position of the refrigerating chamber 101, the freezing chamber 102, the back plate foaming layer, the bottom foaming layer, the top foaming layer, the door body, etc., and may be bent and deformed as needed. Referring to fig. 7, the high voltage electrostatic field generating device 200 is connected to a 12V power supply of the refrigerator, the high voltage electrostatic field generating device 200 is connected to the high voltage electrode 300, the high voltage electrode 301 and the high voltage electrode 302 through connection wires 400, and the high voltage electrode 300, the high voltage electrode 301 and the high voltage electrode 302 are disposed in the top layer, the bottom layer and the foaming layer between the refrigerating chamber 101 and the freezing chamber 102 of the refrigerator, so that the refrigerating chamber 101 and the freezing chamber 102 are disposed in the high voltage electrostatic fields emitted by the three high voltage electrodes, and food in the refrigerator is kept fresh.
The refrigerator with the fresh-keeping function has the following advantages:
1) The depolarization effect caused by the high-voltage electrostatic field changes the membrane potential difference of the fruit and vegetable cells, thereby slowing down the physiological process of cell metabolism and further reducing the respiration intensity and delaying the aging.
2) The high-voltage electrostatic field can ionize air to generate ion mist and a certain amount of ozone, wherein negative ions have the effects of inhibiting metabolism of fruits and vegetables, reducing the respiration intensity of fruits and vegetables, slowing down the activity of enzymes and the like, so that the life cycle is prolonged, the effect of keeping fresh is correspondingly achieved, a large amount of negative ions can charge neutral dust originally, then the effect of electrostatic dust removal is achieved under the action of the electrostatic field, the air at a storage place is purified, carriers for spreading microorganisms can be greatly reduced, and the corrosion rate is inhibited; ozone has a certain bactericidal effect, can react with ethylene, ethanol, acetaldehyde and the like released by fruits and vegetables to generate CO2 and water, inhibits the mature aging of the picked fruits and vegetables, achieves a certain fresh-keeping effect, and is a strong oxidant, has a strong bactericidal effect, and can cause bacteria and toxic bacteria in the air to lose vitality.
3) The high voltage electrostatic field can change the enzyme activity of the aquatic product and slow down the fat oxidation and protein decomposition rate.
4) The electric field in the refrigerator penetrates through the whole food, on one hand, the change of the water molecule combination mode is promoted, the growth trend of ice crystals can be restrained, the nucleation size of the ice crystals is controlled, the ice crystals formed by frozen food are smaller and more round, and unidirectional sharp ice crystals are not easy to form (the generation of sharp ice crystals is avoided to destroy cell structures); on the other hand, the method is favorable for soft freezing and accelerating frozen food to pass through an ice crystal belt in the freezing and thawing processes, thereby ensuring that the cell tissues of the food are not destroyed, reducing the weight loss of blood and the loss of nutrient components and being favorable for keeping the fresh state of the food.
5) The refrigerator can realize freezing-free refrigeration below the freezing point of meat seafood in the range of-3-0 ℃, can be taken out of the refrigerator at any time for processing, and can effectively prevent color change.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (6)
1. The utility model provides a high-voltage electrostatic field generating device with fresh-keeping function which characterized in that includes:
an inverter circuit for inverting the safe DC voltage into a high-voltage AC voltage output in a predetermined range;
An oscillating circuit connected with the inverter circuit and used for generating sinusoidal alternating current signals with certain frequency and amplitude and forming vibration signals in space;
a plurality of high-voltage electrodes connected to the oscillation circuit for generating ozone by applying low-frequency vibration;
the buck filter device is connected with the inverter circuit and used for carrying out buck filter on the boosted alternating voltage;
the power input end of the inverter circuit is connected with a power supply device for providing safe direct-current voltage, the output end of the inverter circuit is connected with the oscillating circuit, the output end of the oscillating circuit is connected with the high-voltage electrode, the step-down filter device is connected with the other end of the inverter circuit, and the step-down filter device is also connected with the ground wire;
The inverter circuit comprises a switching circuit consisting of a transformer and a MOSFET bridge circuit or a triode; the switching circuit formed by the MOSFET bridge circuit or the triode is used as a switch, and the transformer can realize boosting and can primarily convert square waves into triangular waves or sine waves;
The oscillating circuit comprises a frequency-selecting network unit, a positive feedback network unit, a amplitude stabilizing link unit and an amplifying circuit which are connected in sequence;
The amplifying circuit is used for ensuring that the circuit obtains output quantity with a certain amplitude in the process from starting vibration to dynamic balance, and realizing energy control;
The frequency-selecting network unit is used for determining the oscillation frequency of the circuit, so that the circuit generates oscillation with a single frequency, namely, the circuit is ensured to generate sine wave oscillation;
The positive feedback network is used for introducing positive feedback to enable an input signal of the amplifying circuit to be equal to a feedback signal;
The amplitude stabilizing link unit is used for stabilizing the amplitude of the output signal;
The oscillating circuit is an RC sine wave oscillating circuit, an LC sine wave oscillating circuit or a quartz crystal sine wave oscillating circuit;
The voltage reduction filter device comprises a voltage reduction module and a filter module which are sequentially connected, wherein the voltage reduction module is a voltage reduction chip for realizing a voltage reduction function, and the filter module is a filter chip for realizing a filter function.
2. The high-voltage electrostatic field generating device with the fresh-keeping function according to claim 1, wherein an all-aluminum shell is arranged outside the inverter circuit, the safe direct-current voltage is 8-36V, and the high voltage in the preset range is 1000-5000V.
3. The high-voltage electrostatic field generating device with the fresh-keeping function according to claim 1, wherein the high-voltage electrode is a conductive plate, the conductive plate is made of a flexible copper plate, and the surface of the conductive plate is subjected to epoxy resin insulation treatment.
4. The high-voltage electrostatic field generating device with fresh-keeping function according to claim 1, wherein the voltage of the high-voltage electrode is 1000V-5000V, and the power is below 3W.
5. A refrigerator with a fresh-keeping function, which is characterized by comprising a refrigerator body and the high-voltage electrostatic field generating device with the fresh-keeping function as set forth in any one of claims 1-4, wherein the high-voltage electrostatic field generating device is installed in the refrigerator body.
6. The refrigerator with fresh-keeping function according to claim 5, wherein the refrigerator body includes a refrigerating chamber, a freezing chamber, and a compressor chamber;
the high-voltage electrostatic field generating device is arranged in the refrigerating chamber, the freezing chamber and/or the compressor chamber, so that the refrigerator has a fresh-keeping function.
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| CN110271771A (en) * | 2019-07-19 | 2019-09-24 | 清华大学 | A kind of cellular memory, cell storage device and cell storage method that optimization cell saves |
| CN111446881A (en) * | 2020-05-22 | 2020-07-24 | 湖南大学 | Inverter, inverter circuit and construction method thereof |
| CN112327110B (en) * | 2020-10-19 | 2024-06-14 | 中国科学院电工研究所 | Wide-temperature-zone liquid medium environment test device based on conduction cooling of refrigerator |
| CN113204259B (en) * | 2021-04-28 | 2022-05-17 | 武汉大学 | APD bias voltage module with temperature compensation function |
| CN114698768A (en) * | 2021-12-17 | 2022-07-05 | 韩国建 | Electronic device capable of greatly improving mouthfeel of water-containing food in refrigerating chamber of refrigerator |
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