CN108870852A - A kind of low-frequency alternating electric field stable state generation device for fresh food preservation by low temperature - Google Patents
A kind of low-frequency alternating electric field stable state generation device for fresh food preservation by low temperature Download PDFInfo
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- CN108870852A CN108870852A CN201810898528.3A CN201810898528A CN108870852A CN 108870852 A CN108870852 A CN 108870852A CN 201810898528 A CN201810898528 A CN 201810898528A CN 108870852 A CN108870852 A CN 108870852A
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- stable state
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
Abstract
The invention discloses a kind of low-frequency alternating electric field stable state generation devices for fresh food preservation by low temperature comprising sequentially connected integrated switch control device, current signal generating source and electric field antenna plate；The current signal generating source includes voltage reduction module, field-programmable voltage amplification array, boost module, field programmable analog frequency modulation array, mode switch module, driving unit, detection unit and control unit.The present invention is by installing low-frequency alternating electric field stable state generation device additional in cabinet body inside and outside, low-frequency alternating electric field of the frequency between 50Hz~50KHz can be generated, and then reach stable state resonant state, so as to so that interior of the cabinet low-frequency alternating electric field exists when long, reduce fresh food freezing point, realize fresh food ice tremble with fear overlength when refreshing sterilizing；In addition, the present invention can regulate and control electric field magnitude, regulation electric field frequency and change signal mode, fresh-keeping effect is improved to reach, reduces the purpose of freezing point.
Description
Technical field
The invention patent belongs to electronic technology field, and in particular to a kind of low-frequency alternating for fresh food preservation by low temperature
Electric field stable state generation device.
Background technique
In cooling procedure, when being down to a certain temperature, the moisture in fresh food starts to freeze fresh food, and forms ice
Crystalline substance, this temperature are chill point or freezing point.Since the moisture in fresh food typically constitutes from 2/3, up to 95% or more, in water
Dissolved with sugar, acid, minerals and colloidal substance, therefore freezing point is generally between (- 0.5~-3.5) DEG C.Existing fresh food
Preservation physical technique carries out cooling refrigeration or cold storage to fresh food merely.When temperature drops near freezing point, fresh food will
It can gradually be frozen.The hydrone in fresh food can be made to polarize using low-frequency alternating electric field, and make it with electric field
Alternation keep the non-heating of low frequency to shake, the generation of ice crystal is influenced, so that the freezing point of fresh food be made to be greatly reduced.However it is existing
Technology is there are many defects, such as when low frequency electric field of generation cannot be long exists, inefficiency.And theory shows different electricity
Field amplitude makes the reduction of the freezing point of different fresh food (such as fish, meat, vegetables and fruits class) have different effects, at this time such as
Fruit to achieve the effect that fresh food not freeze it is optimal need to make and cover the devices of different amplitudes more and achieve the goal, however this
Resulted in the waste of resource and device active region need to be isolated and caused by space irrational utilization the problem of, while it is theoretical
Show that electric field frequency, the mode (waveform continuous mode and pulse mode) of electric field are the same with amplitude, different values or mode are not to
The reduction of same fresh food freezing point has different effects, also will appear the above problem.
Summary of the invention
Goal of the invention of the invention is：In order to solve the above technological deficiency existing in the prior art, the invention proposes
A kind of low-frequency alternating electric field stable state generation device for fresh food preservation by low temperature.
The technical scheme is that：A kind of low-frequency alternating electric field stable state generation dress for fresh food preservation by low temperature
It sets, including sequentially connected integrated switch control device, current signal generating source and electric field antenna plate；The current signal generates
Source includes that voltage reduction module, field-programmable voltage amplification array, boost module, field programmable analog frequency modulation array, mode are cut
Change the mold block, driving unit, detection unit and control unit, the voltage reduction module, field-programmable voltage amplification array, boosting mould
Block, field programmable analog frequency modulation array, mode switch module, driving unit and detection unit are sequentially connected, and the control is single
Member respectively with the field-programmable voltage amplification array, field programmable analog frequency modulation array, mode switch module and detection
Unit connection.
Further, table wall is arranged in interior of the cabinet in the electric field antenna plate.
Further, the field-programmable voltage amplification array includes operational amplifier and field-programmable Resistor Array Projector
Column.
Further, the reverse side of the operational amplifier is connected by an output end of first resistor and voltage reduction module
It connects, in-phase end is connected by second resistance and the another output of voltage reduction module, and output end is by 3rd resistor and together
The connection of phase end；The field-programmable electric resistance array includes multiple parallel branches, and both ends connect with the both ends of 3rd resistor respectively
It connects, each parallel branch is made of the first metal-oxide-semiconductor being connected in series and the 4th resistance.
Further, the field programmable analog frequency modulation array is made of field-programmable capacitor array.
Further, the field-programmable capacitor array includes multiple parallel branches, both ends respectively with boost module
The connection of two output ends, each parallel branch is made of the second metal-oxide-semiconductor and first capacitor being connected in series.
Further, the mode switch module includes third metal-oxide-semiconductor.
The beneficial effects of the invention are as follows：The present invention is generated by installing a kind of stable state of low-frequency alternating field additional in cabinet body inside and outside
Device can generate low-frequency alternating electric field of the frequency between 50Hz~50KHz, and then reach stable state resonant state, so as to so that
Interior of the cabinet low-frequency alternating electric field exists when long, reduce fresh food freezing point, realize fresh food ice tremble with fear overlength when refreshing sterilizing；
In addition, the present invention can regulate and control electric field magnitude, regulation electric field frequency and change signal mode, to reach improve it is fresh-keeping at
Effect, reduces the purpose of freezing point.
Detailed description of the invention
Fig. 1 is the structural representation of the low-frequency alternating electric field stable state generation device for fresh food preservation by low temperature of the invention
Figure；
Fig. 2 is field-programmable voltage amplification array circuit structural schematic diagram in the embodiment of the present invention；
Fig. 3 is field programmable analog frequency modulation array circuit structural schematic diagram in the embodiment of the present invention；
Fig. 4 is position view of the device relative to refrigerator-freezer in the embodiment of the present invention.
Wherein appended drawing reference is：1, integrated switch control device, 2, current signal generating source, 3, electric field antenna plate.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
As shown in Figure 1, for the low-frequency alternating electric field stable state generation device for fresh food preservation by low temperature of the invention
Structural schematic diagram.A kind of low-frequency alternating electric field stable state generation device for fresh food preservation by low temperature, including it is sequentially connected
Integrated switch control device 1, current signal generating source 2 and electric field antenna plate 3；The current signal generating source 2 includes decompression mould
Block, field-programmable voltage amplification array, boost module, field programmable analog frequency modulation array, mode switch module, driving are single
Member, detection unit and control unit, the voltage reduction module, field-programmable voltage amplification array, boost module, field-programmable
Analog fm array, mode switch module, driving unit and detection unit are sequentially connected, described control unit respectively with it is described existing
Field programmable voltage amplification array, field programmable analog frequency modulation array, mode switch module and detection unit connection.
In an alternate embodiment of the present invention where, above-mentioned integrated switch control device is used to control the on-off of power supply, should
Function can realize that those skilled in the art can be easily according to the state of the art using existing switching circuit
It realizes the function, does not repeat here.
In an alternate embodiment of the present invention where, above-mentioned current signal generating source is for generating AC signal and tool
There are controllable amplitude, controllable frequency and the function of changing signal mode, has including voltage reduction module, field-programmable electricity
Press big array, boost module, field programmable analog frequency modulation array, mode switch module, driving unit, detection unit and control
Unit processed.Current signal generating source adjusts the voltage of out-put supply and frequency according to cut-offfing for internal field programmable gate array,
Supply voltage required for providing it according to the actual needs of electric field antenna plate, so reach generate frequency between 50Hz~
The low-frequency alternating electric field of 50KHz, and then achieve the purpose that stable state resonant state, in addition there are also many defencive functions, as overcurrent,
Over-voltage, overload protection etc..
Voltage reduction module T1 of the invention is used to for alternating current 220v being depressured into 12v safe voltage, and is input to field-programmable
Voltage amplification array；The function can realize that those skilled in the art are according to the existing skill of this field using existing transformer
Art can easily realize the function, not repeat here.
Field-programmable voltage amplification array of the invention includes operational amplifier and field-programmable electric resistance array, is such as schemed
It is field-programmable voltage amplification array circuit structural schematic diagram in the embodiment of the present invention shown in 2；The reverse phase of operational amplifier U1
End is connect by first resistor R1 with an output end of voltage reduction module T1, and in-phase end passes through second resistance R2 and voltage reduction module
The another output of T1 connects, and output end is connect by 3rd resistor R3 with in-phase end；Field-programmable electric resistance array packet
Include multiple parallel branches, both ends are connect with the both ends of 3rd resistor R3 respectively, each parallel branch by be connected in series first
Metal-oxide-semiconductor Q1 and the 4th resistance R4 composition.Field-programmable voltage amplification array can be compiled by the scene after control 3rd resistor R3
Journey electric resistance array controls the amplification coefficient of voltage amplifier, to achieve the purpose that pressure regulation；And pass through control unit control the
The opening and closing of one metal-oxide-semiconductor Q1, make the 4th resistance R4 and entry loop in parallel branch to adjust the resistance in entire circuit, from
And achieve the purpose that adjust voltage amplification coefficient.
Boost module T2 of the invention is used to boost the voltage that field-programmable voltage amplification array exports, and defeated
Enter to field programmable analog frequency modulation array；The function can using existing transformer realize, those skilled in the art according to
The state of the art can easily realize the function, not repeat here.
Field programmable analog frequency modulation array of the invention is made of field-programmable capacitor array, as shown in figure 3, for this
Field programmable analog frequency modulation array circuit structural schematic diagram in inventive embodiments；Field-programmable capacitor array include it is multiple simultaneously
Join branch, both ends connect with two output ends of boost module T2 respectively, and each parallel branch is by the second metal-oxide-semiconductor for being connected in series
Q2 and first capacitor C1 composition.One inductance is formed by the transformer coil of prime boost module T2, afterwards plus field-programmable is electric
Hold array and constitute LC oscillation circuit, the second metal-oxide-semiconductor Q2 is switched on and off by control unit control and is incorporated to capacitor quantity to control,
So as to adjust the total capacitance of field-programmable capacitor array, the characteristic frequency of entire LC oscillation circuit is controlled, to reach control
The purpose of electric voltage frequency output.
Mode switch module of the invention uses third metal-oxide-semiconductor, is connected to the defeated of field programmable analog frequency modulation array
Outlet；The opening and closing of third metal-oxide-semiconductor are controlled to achieve the purpose that adjust electric field patterns by control unit, are realized in wave
It is switched between shape continuous mode and pulse mode.
Control unit of the invention can be compiled for controlling the first metal-oxide-semiconductor Q1, scene in field-programmable voltage amplification array
Second metal-oxide-semiconductor Q2 in journey analog fm array, in mode switch module third metal-oxide-semiconductor opening and closing；The function can adopt
With microprocessor or digital circuit, those skilled in the art can easily realize this according to the state of the art
Function does not repeat here.
As shown in figure 4, for position view of the device relative to refrigerator-freezer in the embodiment of the present invention.Current signal of the invention
Generating source 2 generates AC signal and has the function of changing signal waveform, and table is arranged in interior of the cabinet in electric field antenna plate 3
Wall, generates alternating electric field by access AC signal, the stable state resonance of electric field is formed in interior of the cabinet, to make in refrigerator-freezer
Stable state exists when the low frequency electric field in portion can be long, to realize that the cold overlength of efficient ice is fresh-keeping.In addition, device can regulate and control electric field
Amplitude, regulation electric field frequency and change signal mode, improve fresh-keeping effect to reach, reduce the purpose of freezing point.
The present invention realizes the stable state resonance of low-frequency alternating electric field using symmetrical stainless steel watch wall, and principle is：Alternating electric field
After being generated in cabinet body, it can be generated after being transferred to the table wall on opposite, the table wall that reflected electric wave meets this side will form again
Reflection forms stable state resonant state so as to the roundtrip between symmetrical stainless steel watch wall.
The present invention takes full advantage of the characteristics of metal watch wall can be with low-loss Reflex low frequency alternating electric field, symmetrical using muti-piece
The stainless steel watch wall of placement, thus realize low-frequency alternating electric field efficiently long in refrigerator-freezer when, uniform stable state resonance.?
The low-frequency alternating electric field of even distribution can significantly reduce the freezing point for depositing in the fresh food of interior of the cabinet, protect fresh food
Hold and tremble with fear temperature band in ice, i.e., in subzero, above freezing will not freeze.Both the new old generation of fresh food cell can have been reduced
The growth for thanking, inhibiting bacterium in turn avoids occurring institutional framework damage because freezing, maintain fresh food original state,
Flavor, mouthfeel etc., the results show can Jiang Shui, ox using low-frequency alternating electric field stable state resonance device of the present invention
The freezing point of the fresh food such as meat, the flesh of fish is down to -10 DEG C.
The stable state generation device of low-frequency alternating electric field of the invention is with structure is simple, at low cost, effect is good, to fresh food
The advantages that product are without influencing is suitble to make further genralrlization in the market.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.This field
Those of ordinary skill disclosed the technical disclosures can make according to the present invention and various not depart from the other each of essence of the invention
The specific variations and combinations of kind, these variations and combinations are still within the scope of the present invention.
Claims (7)
1. a kind of low-frequency alternating electric field stable state generation device for fresh food preservation by low temperature, which is characterized in that including successively
Integrated switch control device (1), current signal generating source (2) and the electric field antenna plate (3) of connection；The current signal generating source
It (2) include that voltage reduction module, field-programmable voltage amplification array, boost module, field programmable analog frequency modulation array, mode are cut
Change the mold block, driving unit, detection unit and control unit, the voltage reduction module, field-programmable voltage amplification array, boosting mould
Block, field programmable analog frequency modulation array, mode switch module, driving unit and detection unit are sequentially connected, and the control is single
Member respectively with the field-programmable voltage amplification array, field programmable analog frequency modulation array, mode switch module and detection
Unit connection.
2. being used for the low-frequency alternating electric field stable state generation device of fresh food preservation by low temperature, feature as described in claim 1
It is, table wall is arranged in interior of the cabinet in the electric field antenna plate (3).
3. being used for the low-frequency alternating electric field stable state generation device of fresh food preservation by low temperature, feature as claimed in claim 2
It is, the field-programmable voltage amplification array includes operational amplifier and field-programmable electric resistance array.
4. being used for the low-frequency alternating electric field stable state generation device of fresh food preservation by low temperature, feature as claimed in claim 3
It is, the reverse side of the operational amplifier is connected by an output end of first resistor and voltage reduction module, and in-phase end is logical
The another output for crossing second resistance and voltage reduction module connects, and output end is connect by 3rd resistor with in-phase end；It is described
Field-programmable electric resistance array includes multiple parallel branches, and both ends are connect with the both ends of 3rd resistor respectively, each branch in parallel
Route the first metal-oxide-semiconductor being connected in series and the 4th resistance composition.
5. being used for the low-frequency alternating electric field stable state generation device of fresh food preservation by low temperature, feature as claimed in claim 4
It is, the field programmable analog frequency modulation array is made of field-programmable capacitor array.
6. being used for the low-frequency alternating electric field stable state generation device of fresh food preservation by low temperature, feature as claimed in claim 5
It is, the field-programmable capacitor array includes multiple parallel branches, and both ends connect with two output ends of boost module respectively
It connects, each parallel branch is made of the second metal-oxide-semiconductor and first capacitor being connected in series.
7. being used for the low-frequency alternating electric field stable state generation device of fresh food preservation by low temperature, feature as claimed in claim 6
It is, the mode switch module includes third metal-oxide-semiconductor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810898528.3A CN108870852A (en) | 2018-08-08 | 2018-08-08 | A kind of low-frequency alternating electric field stable state generation device for fresh food preservation by low temperature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810898528.3A CN108870852A (en) | 2018-08-08 | 2018-08-08 | A kind of low-frequency alternating electric field stable state generation device for fresh food preservation by low temperature |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115918717A (en) * | 2022-12-20 | 2023-04-07 | 中国药科大学 | Browning control and fresh keeping method for fresh-cut purple yam |
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