CN108464342B - Electrostatic field generating device, fresh-keeping equipment and electrostatic field control method - Google Patents
Electrostatic field generating device, fresh-keeping equipment and electrostatic field control method Download PDFInfo
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Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/015—Preserving by irradiation or electric treatment without heating effect
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B4/00—General methods for preserving meat, sausages, fish or fish products
- A23B4/015—Preserving by irradiation or electric treatment without heating effect
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
Abstract
The invention provides an electrostatic field generating device, fresh-keeping equipment and a control method of an electrostatic field; the device comprises a power input interface, a power electronic conversion circuit, a voltage conversion circuit, a central control circuit and a discharge circuit; the central control circuit is used for receiving the fresh-keeping parameters of the fresh-keeping equipment and outputting the adjustment instruction of the electrostatic field; the adjustment instructions comprise voltage adjustment instructions and frequency adjustment instructions; the power electronic conversion circuit is used for receiving the regulating command, rectifying and inverting external power supply according to the regulating command, and outputting electric energy with set voltage and set frequency; the voltage conversion circuit performs boosting treatment on the electric energy; the discharging circuit is used for discharging the electric energy after the boosting treatment to generate an electrostatic field. The invention can generate an alternating electrostatic field, thereby automatically adjusting parameters such as field intensity voltage, alternating frequency and the like of the electric field according to preservation conditions, preservation objects and the like, leading the preservation objects to be always in the optimal preservation environment and improving the preservation effect of the preservation equipment.
Description
Technical Field
The invention relates to the technical field of preservation, in particular to an electrostatic field generating device, preservation equipment and an electrostatic field control method.
Background
Under the action of an electrostatic field, the cell membrane potential of the fruits, vegetables and meat changes, the activity of biological enzymes is reduced, and respiratory metabolism activities are inhibited, so that the fresh-keeping effect can be effectively improved by placing the fruits, vegetables and meat in the electrostatic field environment; most of the existing electrostatic field preservation technologies adopt a high-voltage direct-current constant electric field. Because the voltage of the high-voltage direct-current constant electric field source is fixed, it is difficult to ensure that various fruits, vegetables and meats are well preserved; the electric field source is permanently started, and meanwhile, the problems of high-voltage electric coupling connection and the like exist, so that the voltage of the fresh-keeping equipment is high, the safety is poor, and the reliability of the fresh-keeping effect is low.
Aiming at the problem that the reliability of the preservation effect of the direct current constant electric field is low, no effective solution is proposed.
Disclosure of Invention
Accordingly, the present invention is directed to an electrostatic field generating device, a fresh-keeping apparatus, and a method for controlling an electrostatic field, so as to generate an ac electrostatic field, automatically adjust parameters such as field intensity voltage, alternating frequency, etc. of the electric field according to fresh-keeping storage conditions, fresh-keeping objects, etc., so that the fresh-keeping objects are always in an optimal fresh-keeping storage environment, and improve the fresh-keeping effect of the fresh-keeping apparatus.
In a first aspect, an embodiment of the present invention provides an electrostatic field generating apparatus, which is applied to a fresh-keeping device; the device comprises a power input interface, a power electronic conversion circuit, a voltage conversion circuit, a central control circuit and a discharge circuit; the power input interface is connected with an external power supply; the power input interface, the power electronic conversion circuit, the voltage conversion circuit and the discharge circuit are sequentially connected; the central control circuit is connected with the power electronic conversion circuit; the central control circuit is used for receiving the fresh-keeping parameters of the fresh-keeping equipment and outputting the adjustment instruction of the electrostatic field; the adjustment instructions comprise voltage adjustment instructions and frequency adjustment instructions; the power electronic conversion circuit is used for receiving the regulating command, rectifying and inverting external power supply according to the regulating command, and outputting electric energy with set voltage and set frequency; the voltage conversion circuit performs boosting treatment on the electric energy; the discharging circuit is used for discharging the electric energy after the boosting treatment to generate an electrostatic field.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein the power electronic conversion circuit includes a rectifying unit and an inverting unit; the rectification unit is used for rectifying external power supply; the inversion unit is used for performing inversion treatment on the rectified electric energy according to the adjustment instruction and outputting electric energy with set voltage and set frequency.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein the rectifying unit includes a full bridge rectifier; the inverter unit includes a full-control switching device.
With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the voltage conversion circuit includes an isolated voltage converter.
With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the apparatus further includes a parameter acquisition circuit; the parameter acquisition circuit is connected with the central control circuit; the parameter acquisition circuit is used for acquiring the preservation parameters of the preservation equipment and sending the preservation parameters to the central control circuit; the preservation parameters at least comprise one or more of the door opening frequency, the running time, the temperature, the quantity and the type of the preservation objects of the preservation equipment.
With reference to the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, wherein the parameter acquisition circuit includes a human-computer interaction interface unit and/or a sensor unit.
With reference to the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where the apparatus further includes a display circuit; the display screen in the display circuit is arranged on the shell of the fresh-keeping equipment; the display circuit is connected with the central control circuit; the display circuit is used for displaying the fresh-keeping parameters, and the voltage and frequency of the current electrostatic field.
With reference to the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, wherein the discharge circuit includes a metal plate electrode and a ground electrode; the metal plate electrode is arranged opposite to the grounding electrode; the metal plate electrode and the grounding electrode are arranged in the fresh-keeping equipment.
With reference to the first aspect, an embodiment of the present invention provides an eighth possible implementation manner of the first aspect, wherein the power input interface is further configured to connect to a power supply of a plurality of power supply parameters; the power supply parameters include voltage class and ac-dc type.
In a second aspect, an embodiment of the present invention provides a fresh-keeping apparatus, where the fresh-keeping apparatus includes the above-mentioned electrostatic field generating device, and further includes a storage room.
In a third aspect, a method for controlling an electrostatic field provided by an embodiment of the present invention is applied to the above-mentioned electrostatic field generating device; the method comprises the following steps: the central control circuit receives the preservation parameters of the preservation device; the preservation parameters at least comprise the door opening frequency and the running time of the preservation equipment, and the temperature, the quantity and the variety of the preservation objects are various; the central control circuit generates a corresponding adjusting instruction according to a preset control rule; the adjustment instructions comprise voltage adjustment instructions and frequency adjustment instructions; the voltage regulation command comprises a change rule of a field intensity peak value of the electrostatic field along with time; the frequency adjustment instruction comprises a change rule of alternating frequency of the electrostatic field along with time; the preset control rule comprises a corresponding relation between the preservation parameter and the adjusting instruction; the central control circuit outputs the adjusting instruction to the power electronic conversion circuit; the power electronic conversion circuit adjusts the inversion parameters according to the adjustment instruction so as to output electric energy with set voltage and set frequency.
The embodiment of the invention has the following beneficial effects:
according to the electrostatic field generating device, the preservation device and the electrostatic field control method provided by the embodiment of the invention, the preservation parameters of the preservation device are received through the central control circuit, and the adjustment instruction of the electrostatic field is output; receiving the regulating command through a power electronic conversion circuit, rectifying and inverting external power supply according to the regulating command, and outputting electric energy with set voltage and set frequency; boosting the electric energy through a voltage conversion circuit; and then the electric energy after the boosting treatment is discharged by a discharge circuit, so that an electrostatic field is generated. The electrostatic field generated by the method is an alternating current electric field, and parameters such as field intensity voltage, alternating frequency and the like of the electric field can be automatically adjusted according to preservation storage conditions, preservation objects and the like, so that the preservation objects are always in the optimal preservation storage environment, and the preservation effect of the preservation equipment is improved.
Additional features and advantages of the invention will be set forth in the description which follows, or in part will be obvious from the description, or may be learned by practice of the invention.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an electrostatic field generating device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another electrostatic field generating device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a fresh-keeping apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of another preservation apparatus according to an embodiment of the present invention;
fig. 5 is a flowchart of a method for controlling an electrostatic field according to an embodiment of the present invention.
Icon:
10-a power input interface; 11-a power electronic conversion circuit; 12-a central control circuit; 13-a voltage conversion circuit; 14-a discharge circuit; 110-rectifying unit; a 111-inverter unit; 130-isolated voltage converter; 20-a parameter acquisition circuit; 21-a display circuit; 140-metal plate electrodes; 141-a ground electrode; 30-electrostatic field generating means; 31-a storage room; 1-a power input module; a 2-rectification module; 3-an inversion module; 4-a frequency control unit; a 5-voltage conversion module.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Considering the problem that the existing electric field preservation device adopts a direct current constant electric field preservation effect, the embodiment of the invention provides an electrostatic field generation device, preservation equipment and an electrostatic field control method; the technology can be applied to fresh-keeping equipment, so that the fresh-keeping effect of fruits, vegetables and meat is improved; the technique can also be applied to devices where an electrostatic field is required to be set.
For the convenience of understanding the present embodiment, first, an electrostatic field generating device disclosed in the embodiment of the present invention will be described in detail.
Referring to fig. 1, a schematic diagram of an electrostatic field generating device is shown; the device comprises a power input interface 10, a power electronic conversion circuit 11, a central control circuit 12, a voltage conversion circuit 13 and a discharge circuit 14;
the power input interface 10 is connected with an external power supply; the power input interface 10, the power electronic conversion circuit 11, the voltage conversion circuit 13 and the discharge circuit 14 are connected in sequence; the central control circuit 12 is connected with the power electronic conversion circuit 11;
the central control circuit 12 is used for receiving the preservation parameters of the preservation equipment and outputting the adjustment instruction of the electrostatic field; the adjustment instructions include a voltage adjustment instruction and a frequency adjustment instruction; the power electronic conversion circuit 11 is configured to receive an adjustment instruction, rectify and invert external power supply according to the adjustment instruction, and output electric energy with a set voltage and a set frequency; the voltage conversion circuit 13 performs a step-up process on the electric energy; the discharge circuit 14 discharges the boosted electric energy to generate an electrostatic field.
The preservation parameters can be a plurality of types of temperatures, numbers and types of preservation objects, such as door opening frequency and running time of the preservation equipment; when a research and development personnel sets the central control circuit, the corresponding relation between the fresh-keeping parameter and the adjusting instruction can be stored in the central control circuit in advance; the correspondence may be in the form of an operational formula, a list, or the like. After the central control circuit obtains the fresh-keeping parameters, the corresponding adjusting instructions can be obtained by inquiring the corresponding relation so as to adjust the discharge parameters of the electrostatic field to the optimal state.
For example, when the door opening and closing frequency of the preservation apparatus exceeds a set threshold value in a set period of time, the environment in the storage room may be greatly disturbed, and at this time, it may be necessary to adjust the peak voltage of the electrostatic field, or adjust the field strength change rate of the electrostatic field, so as to enhance the preservation effect of the electrostatic field; for example, fresh meat generally requires higher preservation conditions than fruits and vegetables, and when the types of fresh meat are changed from fruits to vegetables, it is also generally necessary to adjust the peak voltage of the electrostatic field or adjust the field strength change rate of the electrostatic field to enhance the fresh-keeping effect of the electrostatic field.
According to the electrostatic field generating device provided by the embodiment of the invention, the central control circuit is used for receiving the preservation parameters of the preservation equipment and outputting the adjustment instruction of the electrostatic field; receiving the regulating command through a power electronic conversion circuit, rectifying and inverting external power supply according to the regulating command, and outputting electric energy with set voltage and set frequency; boosting the electric energy through a voltage conversion circuit; and then the electric energy after the boosting treatment is discharged by a discharge circuit, so that an electrostatic field is generated. The electrostatic field generated by the method is an alternating current electric field, and parameters such as field intensity voltage, alternating frequency and the like of the electric field can be automatically adjusted according to preservation storage conditions, preservation objects and the like, so that the preservation objects are always in the optimal preservation storage environment, and the preservation effect of the preservation equipment is improved.
Referring to fig. 2, another electrostatic field generating device is shown; the device is realized on the basis of the electrostatic field generating device shown in fig. 1; the device comprises a power input interface 10, a power electronic conversion circuit 11, a central control circuit 12, a voltage conversion circuit 13 and a discharge circuit 14.
Further, the power electronic conversion circuit includes a rectifying unit 110 and an inverting unit 111; the rectifying unit 110 is used for rectifying external power supply; the inverter 111 is configured to perform an inversion process on the rectified power according to the adjustment command, and output power with a set voltage and a set frequency. In actual implementation, the electric energy is rectified by the rectifying unit and then output, is connected in series with the internal direct current bus, and is connected in series with the inversion unit; the rectifying unit and the inversion unit integrally form a power electronic conversion circuit, and the power electronic conversion circuit has the functions of realizing the rectification input of a front-stage power supply and outputting electromagnetic energy with controlled voltage and frequency under the control of a central control circuit.
The rectifying unit is generally composed of a main circuit, a filter and a transformer; the rectifying unit can realize three types through a main half-wave rectifier, a full-wave rectifier or a bridge rectifier of a rectifying circuit in the power circuit; the bridge rectifier can be a full bridge rectifier or a half bridge rectifier; the half-bridge rectifier generally comprises a rectifying circuit consisting of two triodes or MOS (metal oxide semiconductor) tubes; the full-bridge rectifier generally comprises a rectifying circuit consisting of four triodes or MOS transistors; in the rectification process of the full-bridge rectifier, the alternating current waveform is firstly converted into the same polarity and then rectified, and all input waveforms form output, so that the full-bridge rectifier has high energy utilization rate and high load capacity; based on this, the present embodiment preferably implements the rectifying unit described above through a full bridge rectifier to obtain a stable dc power supply.
The inverter unit may be implemented by various fully controlled switching devices, such as a gate turn-off thyristor, a power field effect transistor, an insulated gate bipolar transistor; because gallium nitride has the advantages of high broadband, high critical breakdown electric field, high saturated electron drift velocity and high electric mobility, the inversion unit in the embodiment is realized by a gallium nitride (GaN) fully-controlled switching device so as to realize reliable inversion output at high frequency.
In this embodiment, the front stage of the power electronic conversion circuit adopts full-bridge rectification, so that a stable direct-current voltage source can be obtained, and the rear stage adopts an inverter bridge to realize variable-voltage and variable-frequency output. In order to ensure the reliability of the device, the front-stage element can adopt an integrated single-phase full-wave rectifying circuit, and the rear-stage element can adopt a gallium nitride fully-controlled switching device so as to realize reliable inversion output under high frequency.
Further, the voltage conversion circuit includes an isolated voltage converter 130 that boosts and outputs electric energy. Through the isolation type voltage converter, the front stage and the rear stage of the circuit can be electrically isolated, and electric coupling connection between primary high-voltage output and secondary high-voltage output is avoided, so that the electrostatic field generating device has good electric safety and reliability.
The voltage conversion circuit has the capability of crossing low-frequency and high-frequency working conditions through reasonable converter parameter design, has the advantage of wide-range frequency adjustment, and can reach 10 Hz-10 kHz. The design of the traditional power frequency circuit and the design of the high-frequency circuit are respectively focused, the adopted magnetic conductive materials are different, and the frequency change range is smaller, so that the same magnetic core converter is difficult to realize the frequency wide-range adjustment. In the implementation process of the embodiment, by adopting reasonable converter parameter design and matching with reasonable selection of magnetic conductive materials, the method can realize wide-frequency range output by optimizing the control algorithm of the converter and other means.
The electrostatic field generating device further comprises a parameter acquisition circuit 20; the parameter acquisition circuit 20 is connected with the central control circuit; the parameter acquisition circuit 20 is used for acquiring the preservation parameters of the preservation equipment and sending the preservation parameters to the central control circuit; the preservation parameters at least comprise one or more of the door opening frequency, the running time, the temperature, the quantity and the type of the preservation objects of the preservation equipment; in actual implementation, the specific types of the preservation parameters are not limited to the above-mentioned door opening frequency, running time, temperature, number, types of preservation objects, and the like, and may also include other types of preservation parameters.
In actual implementation, the parameter acquisition circuit comprises a human-computer interaction interface unit and/or a sensor unit; specifically, the parameter acquisition circuit may include only a human-computer interaction interface unit, may include only a sensor unit, and may include both the human-computer interaction interface unit and the sensor unit. The man-machine interface unit can be a keyboard, a touch screen and the like and is used for receiving the fresh-keeping parameters input by a user, and the man-machine interface unit can also be a camera or a microphone and is used for receiving the fresh-keeping parameters input by the user in an image recognition or voice recognition mode. The sensor unit can be a sensor for detecting a door opening and closing device of the fresh-keeping equipment, a timer, a thermometer, a weight detection device and the like, and is used for acquiring corresponding fresh-keeping parameters. The sensor in the sensor unit may comprise various sensitive devices such as heat sensitive, light sensitive, humidity sensitive, gas sensitive, force sensitive, color sensitive, and taste sensitive.
Further, the above device may detect whether the preservation object is stored in the storage room through the above sensor unit (e.g., weight detecting device), and when the storage room is idle, the central control circuit may automatically control the equipment to be turned off; when the preservation object is stored in the storage room, the central control circuit automatically controls the equipment to be started, so that the energy-saving effect of the preservation equipment is improved.
The device also comprises a display circuit 21; the display screen in the display circuit 21 is arranged on the shell of the fresh-keeping equipment; the display circuit 21 is connected with the central control circuit; the display circuit is used for displaying the fresh-keeping parameters, and the voltage and frequency of the current electrostatic field. Through the display circuit, a user can conveniently know the running state of each fresh-keeping device, fresh-keeping objects and the like.
The discharge circuit includes a metal plate electrode 140 and a ground electrode 141; the metal plate electrode 140 is disposed opposite to the ground electrode 141; the metal plate electrode 140 and the ground electrode 141 are disposed in the fresh keeping apparatus. The material of the metal plate electrode may be platinum (Pt), copper (Cu), zinc (Zn), silver (Ag), or an alloy of a plurality of metals.
For example, when the metal plate electrode is disposed at the top of the storage chamber of the fresh-keeping apparatus, the ground electrode may be disposed at the bottom of the storage chamber; when the metal plate electrode is arranged at the left side of the storage room of the fresh-keeping equipment, the grounding electrode can be arranged at the right side of the storage room; of course, the positions of the metal plate electrode and the ground electrode may be interchanged, so that the discharge circuit and the storage chamber integrally form a space electrostatic field. In general, the generated electrostatic field is between the metal plate electrode and the grounding electrode, so that the preservation object is placed between the metal plate electrode and the grounding electrode, and the preservation environment of the variable-frequency electrostatic field is realized.
The above-described ground electrode may be implemented in various ways; for example, the ground electrode may be connected to ground, as shown in fig. 4 below; the ground electrode may be a metal plate-type ground electrode, and in this case, the ground electrode is insulated from the ground, that is, is not connected to the ground; the grounding electrode is arranged opposite to the metal plate electrode, and is aligned in parallel, and a space alternating electrostatic field is formed between the two metal plates.
In order to improve the adaptability of the electrostatic field generating device to the application environment, the power input interface is also used for connecting a power supply with various power supply parameters; the power supply parameters include voltage class and ac-dc type. The power input interface can be connected with 110V-220V AC/DC mixed input type with different voltage levels, the input voltage range is wide, and the electrostatic field generating device can reliably work in different power supply scenes.
Corresponding to the above-mentioned electrostatic field generating device, the embodiment of the present invention further provides a fresh-keeping apparatus, as shown in fig. 3, which includes the above-mentioned electrostatic field generating device 30 and further includes a storage chamber 31. The fresh-keeping equipment can also comprise an alarm which can be used for detecting the electric leakage of the fresh-keeping equipment, and when the equipment is in electric leakage, the alarm generates an alarm signal to prompt a user to repair.
As shown in fig. 4, another fresh-keeping apparatus is provided in the embodiment of the present invention, and the apparatus includes a power input module 1 (corresponding to the power input interface), a rectifying module 2 (corresponding to the rectifying unit), an inverting module 3 (corresponding to the inverting unit), a frequency control unit 4 (corresponding to the central control circuit), a voltage conversion module 5 (corresponding to the voltage conversion circuit), and a discharging circuit 14; the discharge circuit is disposed in the storage chamber.
The frequency control unit is a comprehensive strategy control system in the preservation equipment, the system collects various parameters of a storage room and a preservation object, including door opening and closing times, time, temperature, quantity and types of the preservation object, intelligently judges and obtains required optimal electric field conditions according to various parameter conditions, outputs voltage and frequency control instructions, enables the inverter circuit to work according to the transmitted instructions, and finally generates an electric field preservation environment based on a time sequence of variable field intensity peak value and variable field intensity change rate.
The fresh-keeping equipment provided by the embodiment of the invention has the same technical characteristics as the electrostatic field generating device provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
Corresponding to the above-mentioned electrostatic field generating device and the above-mentioned fresh-keeping apparatus, the embodiment of the invention also provides a control method of electrostatic field, as shown in fig. 5, the method is applied to the above-mentioned electrostatic field generating device; the method comprises the following steps:
step S502, a central control circuit receives fresh-keeping parameters of fresh-keeping equipment; the preservation parameters at least comprise one or more of the door opening frequency, the running time of the preservation equipment, the temperature, the quantity and the type of the preservation objects;
step S504, the central control circuit generates a corresponding adjusting instruction according to a preset control rule; the adjustment instructions include a voltage adjustment instruction and a frequency adjustment instruction; the voltage regulation command comprises a change rule of a field intensity peak value of the electrostatic field along with time; the frequency adjustment instruction comprises a change rule of alternating frequency of an electrostatic field along with time; the preset control rule comprises a corresponding relation between the fresh-keeping parameter and the adjusting instruction;
step S506, the central control circuit outputs the adjusting instruction to the power electronic conversion circuit;
in step S508, the power electronic conversion circuit adjusts the inversion parameters according to the adjustment command to output the set voltage and the set frequency of the electric energy.
According to the control method of the electrostatic field, provided by the embodiment of the invention, the electrostatic field environment based on a specific field intensity peak value and a field intensity change rate of a time sequence can be generated through the voltage regulation command and the frequency regulation command; parameters such as field intensity voltage, alternating frequency and the like of an electric field can be automatically adjusted according to preservation storage conditions, preservation objects and the like, so that the preservation objects are always in an optimal preservation storage environment, and the preservation effect of the preservation equipment is improved.
The embodiment of the invention provides an electrostatic field generating device, a fresh-keeping device and an electrostatic field control method, and provides a fresh-keeping technology based on an alternating-current electrostatic field, wherein the technology can adjust an output field intensity peak value, a field intensity change and field intensity action time; in order to ensure good fresh-keeping effect, the alternating current electrostatic field needs to select proper field intensity peak values, and the same organisms are in different field intensity conditions, so that the generated effects are different, and the proper field intensity peak values are selected according to the characteristics of the organisms, so that the optimal storage effect can be achieved; the alternating current electrostatic field also needs to select proper alternating frequency and different electric field frequencies, and different voltage change rates du/dt of the alternating current electrostatic field bring different field intensity change rates, and the optimal field intensity required by different fresh-keeping objects is different, so that specific field intensity change rates are selected for different fresh-keeping objects, and the fresh-keeping equipment has optimal fresh-keeping effect; in addition, the alternating current electrostatic field also needs to select a proper field intensity emission strategy, and the combination strategy of different field intensity peaks and different field intensity change rates based on time sequences is generated by combining the field intensity peaks and the field intensity change rates, so that the optimal alternating current electrostatic field required by each fresh-keeping object and fresh-keeping storage adjustment can be obtained.
The electrostatic field generating device, the preservation equipment and the electrostatic field control method provided by the embodiment of the invention change the defects of the traditional fixed voltage, fixed frequency and permanent startup, adopt the automatic voltage transformation frequency conversion technology, select the optimal field intensity peak value and the field intensity change rate target according to the temperature, the water content and the storage state of a preservation object, generate the electrostatic field environment based on the specific field intensity peak value and the field intensity change rate of a time sequence, thereby effectively changing the cell membrane potential state of organisms, inhibiting the activity of biological enzymes, reducing respiratory metabolism activity, inhibiting bacterial reproduction and achieving the optimal preservation effect.
The computer program product of the electrostatic field generating device, the fresh keeping apparatus and the method for controlling an electrostatic field provided by the embodiments of the present invention includes a computer readable storage medium storing program codes, and the instructions included in the program codes may be used to execute the method described in the foregoing method embodiments, and specific implementation may refer to the method embodiments and will not be repeated herein.
In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The electrostatic field generating device is characterized by being applied to fresh-keeping equipment, and comprises a power input interface, a power electronic conversion circuit, a voltage conversion circuit, a central control circuit, a discharge circuit, a parameter acquisition circuit and a display circuit, wherein the discharge circuit comprises a metal plate electrode and a grounding electrode;
the power input interface is connected with an external power supply and a power supply with various power supply parameters; the power input interface, the power electronic conversion circuit, the voltage conversion circuit and the discharge circuit are sequentially connected; the central control circuit is connected with the power electronic conversion circuit; the power supply parameters comprise voltage class and AC/DC type;
the central control circuit is used for receiving the preservation parameters of the preservation equipment and outputting the adjustment instruction of the electrostatic field; the regulation instructions comprise a voltage regulation instruction and a frequency regulation instruction; the power electronic conversion circuit is used for receiving the regulating instruction, rectifying and inverting external power supply according to the regulating instruction, and outputting electric energy with set voltage and set frequency; the voltage conversion circuit performs boosting treatment on the electric energy; the discharging circuit is used for discharging the electric energy after the boosting treatment to generate an electrostatic field, and the metal plate electrode and the grounding electrode are arranged oppositely; the metal plate electrode and the grounding electrode are arranged in the fresh-keeping equipment;
the parameter acquisition circuit is connected with the central control circuit; the parameter acquisition circuit is used for acquiring the preservation parameters of the preservation equipment and sending the preservation parameters to the central control circuit; the preservation parameters at least comprise one or more of the door opening frequency, the running time, the temperature, the quantity and the type of the preservation objects of the preservation equipment;
wherein, the parameter acquisition circuit includes man-machine interaction interface unit and, perhaps sensor unit, man-machine interface unit includes: one or more of a keyboard, a touch screen, a camera and a microphone, wherein the man-machine interface unit is used for receiving the preservation parameters input by a user in a mode of image recognition and/or voice recognition and/or keyboard input, and the sensor unit comprises: sensing device for detecting switch door of fresh-keeping equipment, timer, thermometer and weight detection device, and several sensitive devices including thermosensitive, photosensitive, moisture-sensitive, gas-sensitive, force-sensitive, colour-sensitive and taste-sensitive;
the display screen in the display circuit is arranged on the shell of the fresh-keeping equipment; the display circuit is connected with the central control circuit; the display circuit is used for displaying the preservation parameters, and the voltage and frequency of the current electrostatic field.
2. The apparatus of claim 1, wherein the power electronic conversion circuit comprises a rectifying unit and an inverting unit;
the rectification unit is used for rectifying external power supply; and the inversion unit is used for performing inversion treatment on the rectified electric energy according to the regulating instruction and outputting electric energy with set voltage and set frequency.
3. The apparatus of claim 2, wherein the rectifying unit comprises a full bridge rectifier; the inversion unit comprises a full-control type switching device.
4. The apparatus of claim 1, wherein the voltage conversion circuit comprises an isolated voltage converter.
5. A preservation apparatus characterized in that the preservation apparatus comprises the electrostatic field generating device according to any one of claims 1 to 4, further comprising a storage room.
6. A method of controlling an electrostatic field, characterized in that the method is applied to the electrostatic field generating device according to any one of claims 1 to 4; the method comprises the following steps:
the central control circuit receives the preservation parameters of the preservation device; the preservation parameters at least comprise one or more of the door opening frequency, the running time, the temperature, the quantity and the type of the preservation objects of the preservation equipment;
the central control circuit generates a corresponding adjusting instruction according to a preset control rule; the regulation instructions comprise a voltage regulation instruction and a frequency regulation instruction; the voltage regulation command comprises a change rule of a field intensity peak value of the electrostatic field along with time; the frequency adjustment instruction comprises a change rule of alternating frequency of the electrostatic field along with time; the preset control rule comprises a corresponding relation between the preservation parameter and the regulating instruction;
the central control circuit outputs the adjusting instruction to the power electronic conversion circuit;
and the power electronic conversion circuit adjusts inversion parameters according to the adjustment instruction so as to output electric energy with set voltage and set frequency.
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| JP2020186845A (en) * | 2019-05-14 | 2020-11-19 | 株式会社ＭＡＲＳ Ｃｏｍｐａｎｙ | Storage and preservation method |
| 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 |
| CN110477684B (en) * | 2019-08-14 | 2024-04-09 | 长虹美菱股份有限公司 | Storage shelf for fruits and vegetables at normal temperature |
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