CN110973234B - Fruit and vegetable fresh-keeping device and method based on single-array type dielectric barrier discharge plasma - Google Patents
Fruit and vegetable fresh-keeping device and method based on single-array type dielectric barrier discharge plasma Download PDFInfo
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- CN110973234B CN110973234B CN201911079676.3A CN201911079676A CN110973234B CN 110973234 B CN110973234 B CN 110973234B CN 201911079676 A CN201911079676 A CN 201911079676A CN 110973234 B CN110973234 B CN 110973234B
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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
- A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
- A23B7/144—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor
- A23B7/148—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O
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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
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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
- A23B7/04—Freezing; Subsequent thawing; Cooling
- A23B7/0425—Freezing; Subsequent thawing; Cooling the material not being transported through or in the apparatus, with or without shaping, e.g. in the form of powder, granules or flakes
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Abstract
The invention belongs to the field of fruit and vegetable refrigeration and preservation, and relates to a fruit and vegetable preservation device based on single-array dielectric barrier discharge plasma. The device installs single array dielectric barrier discharge plasma excitation device in the supporter of forced air cooling freezer, wherein: the single-array type dielectric barrier discharge plasma excitation device comprises: the device comprises electrodes, a discharge medium, a fixing device, electrode outgoing lines, a transformer, a pulse power supply and a discharge area; the discharge medium wraps the electrodes and is fixed in the storage rack through the fixing device, the two ends of each electrode are provided with the insulating sealing caps, the insulating sealing caps are connected with the discharge medium in a sealing mode and are connected with the transformer and the pulse power supply through the electrode outgoing lines, and the discharge area is located between the adjacent discharge media. The invention adopts the pulse type plasma exciter, and the intermittent treatment mode is mild and energy-saving; the plasma adopts a normal-pressure air excitation mode, so that the comprehensive fruit and vegetable fresh-keeping can be carried out. The invention also provides a fruit and vegetable fresh-keeping method based on the single-array dielectric barrier discharge plasma.
Description
Technical Field
The invention relates to the field of fruit and vegetable refrigeration and preservation, in particular to a fruit and vegetable preservation device and method based on single-array dielectric barrier discharge plasma.
Technical Field
With the attention of people on the fresh-keeping of fruits and vegetables, air cooling frostless has become a technical development trend of the freezer fresh-keeping industry and a main fresh-keeping means, but the refrigeration fresh-keeping technology still has inevitable defects. At present, the refrigeration temperature (2-8 ℃) can only inhibit the growth and the propagation of partial microorganisms, generally can not inhibit the growth of psychrophilic bacteria (such as yersinia, listeria and pseudomonas), can not realize real-time online sterilization and air purification, and can not effectively prevent the browning of fruits and vegetables, degrade ethylene and the like. Therefore, on the basis of the existing traditional air-cooled refrigerator, further technical innovation is realized to prolong the shelf life of fruits and vegetables, and the air-cooled refrigerator has great economic value and social benefit.
In recent years, the low-temperature plasma technology has great potential for fruit and vegetable fresh-keeping, has the advantages of normal-pressure air excitation, low treatment temperature, no chemical residue after treatment and the like, and is a new green, environment-friendly and efficient fresh-keeping technology. A large number of researches show that the low-temperature plasma has the functions of sterilizing and inactivating enzymes, including inhibiting browning, softening and lignification of fruits and vegetables, and can effectively prolong the shelf life of the fruits and vegetables. At present, a patent CN 2502214Y (see the new utility model patent application "low-temperature plasma freezing device" in liu biography, published as 24/07/2002, and published as CN 2502214Y) discloses a low-temperature plasma freezing device, but the requirement of the excitation vacuum degree of the plasma is high, the cost is high, and the device is not easily accepted by consumers. Patent CN101934190A discloses a matrix type dielectric barrier discharge plasma odor treatment device (see the invention patent application "matrix type dielectric barrier discharge plasma odor treatment device" of environment protection engineering ltd, made by Shandong paidi, published as 2011, 01, 05, and publication No. CN 101934190A). Patent 201710255637.9 discloses a method for tightly combining a controlled atmosphere preservation technology with low-temperature plasma sterilization to remarkably prolong the shelf life of vegetable food by more than 15 days (see the invention patent application of southern science and technology, "a vegetable preservation method and device", published as 09 and 15 days in 2017 and CN 107156279A), but the design is too simple, potential safety hazards exist in the plasma excitation process, and the all-round preservation of fruits and vegetables cannot be realized.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a single-array type dielectric barrier discharge plasma based fruit and vegetable fresh-keeping device, which can carry out all-around fresh keeping on fruits and vegetables and effectively prolong the shelf life of the fruits and vegetables.
The invention also provides a fruit and vegetable fresh-keeping method based on the single-array dielectric barrier discharge plasma.
The invention is realized by adopting the following technical scheme:
based on single array dielectric barrier discharge plasma fruit vegetables fresh-keeping device, install single array dielectric barrier discharge plasma excitation device in the supporter of air-cooled freezer, wherein: the single-array type dielectric barrier discharge plasma excitation device comprises: the device comprises electrodes, a discharge medium, a fixing device, electrode outgoing lines, a transformer, a pulse power supply and a discharge area; the discharge medium wraps the electrodes and is fixed in the storage rack through the fixing device, the two ends of each electrode are provided with the insulating sealing caps, the insulating sealing caps are connected with the discharge medium in a sealing mode and are connected with the transformer and the pulse power supply through the electrode outgoing lines, and the discharge area is located between the adjacent discharge media.
Preferably, the discharge medium is a quartz tube, two ends of the quartz tube are provided with insulating sealing caps, the insulating sealing caps are provided with cable through holes, and the insulating sealing caps are connected with the quartz tube in a sealing mode.
Preferably, the electrode is a metal tube and is arranged inside the discharge medium, the outer diameter of the electrode is 4.05mm, and metal powder is uniformly filled between the electrode and the discharge medium.
Preferably, the outer diameter of the quartz tube is 24.30mm, the thickness of the quartz tube is 1mm, the length of the quartz tube is 350.00mm, and the quartz tube is arranged in a single-row array.
Preferably, the discharge area is the middle area of the adjacent discharge medium, and the discharge area is a rectangular cavity with the length of 350.00mm and the width of 1571.00 mm.
Preferably, the pulsed power supply is a microsecond pulsed plasma power supply.
Preferably, the center frequency of the pulse power supply is 10 KHz; frequency range: 1-45 KHz; rise time: 1-10 mus; pulse width: 1-20 mus; output voltage: 5-100 KV.
Preferably, the single array type dielectric barrier discharge plasma excitation device is detachable.
The fruit and vegetable fresh-keeping method based on the single-array dielectric barrier discharge plasma comprises the following steps:
(1) sorting fresh picked fruits and vegetables and placing on a storage rack;
(2) starting a fruit and vegetable fresh-keeping device based on the single-array dielectric barrier discharge plasma to carry out air cooling and precooling on the temperature in the cabinet and the temperature of the fruits and vegetables;
(3) starting a single array type dielectric barrier discharge plasma excitation device to carry out preliminary deep treatment;
(4) and then starting the single-array dielectric barrier discharge plasma excitation device to perform intermittent treatment according to the requirement.
Preferably, the plasma excitation device has a preliminary deep treatment time of 5-360s and a subsequent batch treatment time of 5-240 s.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the invention uses cold air circulated by the refrigerator as a plasma excitation air source, and the obtained plasma oxidation active ingredients are distributed in the refrigerator through flowing cold air, so that the comprehensive fruit and vegetable fresh-keeping can be carried out. The plasma treatment time is short, the efficiency is high, the chemical residue is basically avoided after the post-treatment of sterilization, browning resistance, softening, ethylene degradation and pesticide residue, the secondary pollution is avoided while the quality safety of the fruits and the vegetables is ensured, and the method is very suitable for the all-round refrigeration and fresh-keeping of the fruits and the vegetables.
(2) The fruit and vegetable fresh-keeping device has the advantages of mild, green and efficient plasma treatment conditions, small influence on the quality attributes such as color and luster of food and no chemical residue after treatment.
(3) The fruit and vegetable fresh-keeping device has the functions of low-temperature fresh-keeping and plasma correlation, can effectively inhibit bacteria and sterilize, can effectively degrade ethylene and pesticide residues, and can prevent browning, texture softening and lignification of fruits and vegetables under the condition of low temperature. The introduction of the plasma technology can bring the functions of deodorization, pesticide residue removal, insect pest avoidance and the like, comprehensively protect the quality of the fruits and vegetables in the refrigerated cabinet, effectively prolong the shelf life of the fruits and vegetables while keeping the fresh quality of the fruits and vegetables, and reduce the waste of the fruits and vegetables.
(4) The fruit and vegetable fresh-keeping device has low operation cost. A pulse type plasma exciter is adopted, and the intermittent treatment mode is mild and energy-saving; the plasma adopts a normal-pressure air excitation mode, so that the fruit and vegetable fresh-keeping device does not need to be additionally vacuumized or use food-grade industrial standard gas during operation, and the use cost and the use threshold of a user are reduced.
Drawings
FIG. 1 is a schematic structural diagram of a single-array type dielectric barrier discharge plasma based fruit and vegetable preservation device in an embodiment of the present invention;
fig. 2 is a view of a single array type dielectric barrier discharge plasma excitation device according to an embodiment of the present invention, wherein: (a) is a top view; (b) is a side view; (c) is a front view.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
The invention is completed by installing a single array type dielectric barrier discharge plasma excitation device in a storage rack on the basis of the traditional air-cooled refrigerator and combining and designing. Fruit and vegetable fresh-keeping device based on single array type dielectric barrier discharge plasma comprises: the traditional air-cooled refrigerator (provided with air-cooled air vents and a detachable fruit and vegetable rack) and the plasma excitation device (a discharge medium, electrodes, electrode outgoing lines, a discharge area, a transformer, a pulse power supply and a fixing device). The discharge medium of the plasma excitation device wraps the electrodes and is fixed in the storage rack through the fixing device, the electrodes are arranged in the discharge medium and are connected with the transformer and the pulse power supply through the electrode outgoing lines, and the discharge area is arranged between the adjacent discharge media. Wherein: the plasma excitation device can be detached at any time. A pulse power supply is adopted as a plasma excitation power supply, and the intermittent processing mode is mild and energy-saving. When air flows between the electrodes, the plasma oxidation active ingredients generated by the excitation between the electrodes are distributed in the refrigerated cabinet through cold air flowing in the refrigerated cabinet, so that the comprehensive fruit and vegetable fresh-keeping can be carried out.
The single-array dielectric barrier discharge plasma based fruit and vegetable fresh-keeping device uses cold air circulated by the refrigerated cabinet as a plasma excitation air source, and the obtained plasma oxidation active ingredients are distributed in the refrigerated cabinet through flowing cold air, so that the fruit and vegetable fresh-keeping can be carried out comprehensively. The plasma treatment time is short, the efficiency is high, no chemical residue is left after sterilization, anti-browning and softening, ethylene degradation and pesticide residue post-treatment, secondary pollution is avoided while the quality safety of the fruits and vegetables is ensured, and the method is very suitable for all-dimensional cold storage and fresh keeping of the fruits and vegetables.
In a preferred embodiment, based on a single-array type dielectric barrier discharge plasma fruit and vegetable fresh-keeping device, as shown in fig. 1, a detachable single-array type dielectric barrier discharge plasma excitation device and an emergency stop button 11 are installed in a storage rack 3 of an air-cooled refrigerator 1. The plasma excitation device comprises an electrode 2, a discharge medium 4, a fixing device 5, an electrode lead-out wire 6, a transformer 7, a pulse power supply 8 and a discharge area 9. The electrode 2 is arranged in the discharge medium 4, the two ends of the electrode 2 are provided with insulating sealing caps 10, the insulating sealing caps 10 are hermetically connected with the discharge medium 4 and are connected with the transformer 7 and the pulse power supply 8 through the electrode lead-out wires 6, and the discharge area 9 is arranged between the adjacent discharge media.
A view of a single array type dielectric barrier discharge plasma excitation device is shown in fig. 2, wherein: (a) is a top view; (b) is a side view; (c) is a front view.
Specifically, the plasma excitation device adopts a single array type dielectric barrier discharge form, and the plasma excitation device occupies a small space but has a large processing area.
The discharge medium is a quartz tube, two ends of the quartz tube are provided with insulating sealing caps, the sealing caps are provided with cable through holes, and the sealing caps are connected with the quartz tube in a sealing mode.
In a preferred embodiment, the quartz tube has an outer diameter of 24.30mm, a thick wall of 1mm and a tube length of 350.00 mm. The quartz tubes are arranged in a single-row array, the distance between every two adjacent quartz tubes is 18.18mm, and the number of the single-row quartz tubes is 35.
The electrode adopts a metal tube and is arranged inside the discharge medium, the outer diameter of the electrode is 4.05mm, and metal powder is uniformly filled between the electrode and the discharge medium. The effect of metal powder has shortened the discharge distance, and under the same voltage, the electrode discharges more easily, and in addition, the metal powder of packing plays good cushioning effect, prevents that the electrode inflation from propping apart the quartz capsule.
The discharge area is between adjacent discharge media, and the discharge area is a rectangular cavity with the length of 350.00mm and the width of 1571.00 mm.
The plasma excitation power supply is a microsecond pulse plasma power supply (the central frequency is about 10KHz, the frequency adjustable range is 1-45 KHz, the rising time is about 1-10 mu s, the pulse width is about 1-20 mu s, and the output voltage is 5-100 KV). The pulse power supply is similar to intermittent treatment, prevents heat accumulation in continuous treatment, can improve the effects of sterilization and the like, and can effectively prevent heat accumulation, so that the whole treatment process is in a low-temperature state.
The fruit and vegetable fresh-keeping device is also provided with an emergency stopping device based on the single-array dielectric barrier discharge plasma, and a door of the fruit and vegetable fresh-keeping device is set to be in a closed state before the plasma is excited, so that excitation and use safety are ensured.
The fruit and vegetable fresh-keeping method based on the single-array dielectric barrier discharge plasma comprises the following steps:
(1) sorting fresh picked fruits and vegetables and placing on a storage rack;
(2) starting a fruit and vegetable fresh-keeping device based on the single-array dielectric barrier discharge plasma to carry out air cooling and precooling on the temperature in the cabinet and the temperature of the fruits and vegetables;
(3) starting a single array type dielectric barrier discharge plasma excitation device to carry out preliminary deep treatment;
(4) and then starting the single-array dielectric barrier discharge plasma excitation device to perform intermittent treatment according to the requirement.
Preferably, the plasma excitation device has a primary deep treatment time of 5-360s and a subsequent batch treatment time of 5-240 s.
The fresh-keeping effect of the fresh-keeping device and the fresh-keeping method of the present invention will be described in further detail through specific examples.
Example 1
The fruit and vegetable fresh-keeping method comprises the following steps:
(1) sorting fresh picked litchis and placing the litchis on a storage rack of a refrigerated cabinet;
(2) starting a plasma fruit and vegetable fresh-keeping device, and precooling the fruits and vegetables by using circularly flowing cold air;
(3) starting a single-array dielectric barrier discharge plasma excitation device, and performing primary deep treatment;
(4) and then starting the single-array dielectric barrier discharge plasma excitation device to perform intermittent treatment according to the requirement.
Specifically, after the refrigerated cabinet and the plasma generator are started, when air flows between the electrodes, plasma oxidation active ingredients generated by excitation between the electrodes are distributed in the refrigerated cabinet through flowing cold air, and therefore all-round fresh keeping of fruits and vegetables can be achieved. The temperature in the control cabinet is 2-8 ℃, the air speed in the control cabinet is 1m/s, the primary advanced treatment time of the plasma is 2min, and the subsequent intermittent treatment time is 1 min.
The results show that: after the traditional refrigerator is used for refrigerating for 5 days, the litchi peel in the traditional refrigerator is dry, the color deepening browning phenomenon is very serious, and some fruits even have alcoholic smell, but the single-array type dielectric barrier discharge plasma based fruit and vegetable fresh-keeping device based on the dielectric barrier discharge plasma has the functions of sterilizing and purifying the air in the refrigerator, particularly can effectively prevent the browning of fruits and vegetables, is obviously superior to the traditional refrigerator in shelf life and quality attribute, and can prolong the shelf life by 7 days.
Example 2
The fruit and vegetable fresh-keeping device based on the embodiment is the same as the embodiment 1.
The fruit and vegetable fresh-keeping method comprises the following steps:
(1) picking fresh picked tomatoes and placing the tomatoes in a tray;
(2) starting a plasma fruit and vegetable fresh-keeping device, and precooling the fruits and vegetables by using circularly flowing cold air;
(3) starting a single-array dielectric barrier discharge plasma excitation device, and performing primary deep treatment;
(4) and then starting the single-array dielectric barrier discharge plasma excitation device to perform intermittent treatment according to the requirement.
Specifically, after the refrigerated cabinet and the plasma generator are started, when air flows between the electrodes, plasma oxidation active ingredients generated by excitation between the electrodes are distributed in the refrigerated cabinet through flowing cold air, and therefore comprehensive fruit and vegetable fresh keeping can be achieved. Controlling the cabinet internal temperature at 2-8 deg.C, the cabinet internal air speed at 1.2m/s, the plasma primary advanced treatment time at 2.5min, and the subsequent intermittent treatment time at 1.5 min.
After the fruit and vegetable fresh-keeping device is refrigerated for 7 days, the ethylene concentration in the fruit and vegetable fresh-keeping device based on the single-array dielectric barrier discharge plasma is obviously lower than that in a traditional refrigerated cabinet, part of tomato meat in the traditional refrigerated cabinet is in a water bubble soft rot shape or has scattered black spots, the fresh taste is naturally and naturally absent, and the fresh taste is long in time and even decays. The tomatoes in the fruit and vegetable fresh-keeping device based on the single-array dielectric barrier discharge plasma are bright in color and better in fresh-keeping effect.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (6)
1. Based on single array dielectric barrier discharge plasma fruit vegetables fresh-keeping device, its characterized in that installs single array dielectric barrier discharge plasma excitation device in the supporter of air-cooled freezer, wherein: the single-array type dielectric barrier discharge plasma excitation device comprises: the device comprises electrodes, a discharge medium, a fixing device, electrode outgoing lines, a transformer, a pulse power supply and a discharge area; the discharge medium wraps the electrode and is fixed in the storage rack through a fixing device, the two ends of the electrode are provided with insulating sealing caps which are hermetically connected with the discharge medium and are connected with the transformer and the pulse power supply through electrode outgoing lines, and the discharge area is between the adjacent discharge media;
the electrode adopts a metal tube and is arranged in the discharge medium, the outer diameter of the electrode is 4.05mm, and metal powder is uniformly filled between the electrode and the discharge medium;
the discharge medium is a quartz tube, two ends of the quartz tube are provided with insulating sealing caps, cable through holes are formed in the insulating sealing caps, and the insulating sealing caps are connected with the quartz tube in a sealing mode;
the outer diameter of the quartz tube is 24.30mm, the thick wall is 1mm, the length of the quartz tube is 350.00mm, and the quartz tubes are arranged in a single-row array manner;
the discharge area is the middle area of the adjacent discharge medium, and is a rectangular cavity with the length of 350.00mm and the width of 1571.00 mm;
the single array type dielectric barrier discharge plasma excitation device is provided with an emergency braking device.
2. The plasma fruit and vegetable fresh-keeping device according to claim 1, wherein the pulse power source is a microsecond pulse plasma power source.
3. The plasma fruit and vegetable fresh-keeping device according to claim 2, characterized in that the center frequency of the pulse power supply is 10 KHz; frequency range: 1-45 KHz; rise time: 1-10 mus; pulse width: 1-20 mus; output voltage: 5-100 KV.
4. The plasma fruit and vegetable fresh-keeping device according to claim 1, wherein the single array type dielectric barrier discharge plasma excitation device is detachable.
5. The fruit and vegetable fresh-keeping method based on the single-array type dielectric barrier discharge plasma is characterized by being realized based on the plasma fruit and vegetable fresh-keeping device of any one of claims 1 to 4, and comprises the following steps:
(1) sorting fresh picked fruits and vegetables and placing on a storage rack;
(2) starting a fruit and vegetable fresh-keeping device based on the single-array dielectric barrier discharge plasma to carry out air cooling and precooling on the temperature in the cabinet and the temperature of the fruits and vegetables;
(3) starting a single array type dielectric barrier discharge plasma excitation device to carry out preliminary deep treatment;
(4) and then starting the single-array dielectric barrier discharge plasma excitation device to perform intermittent treatment according to the requirement.
6. The plasma fruit and vegetable fresh-keeping method according to claim 5, characterized in that the plasma excitation device is used for preliminary deep treatment for 5-360s and subsequent intermittent treatment for 5-240 s.
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| CN111657338A (en) * | 2020-07-10 | 2020-09-15 | 天津科技大学 | Cabinet type low-temperature plasma fruit and vegetable sterilization equipment and sterilization method thereof |
| CN112075492A (en) * | 2020-08-31 | 2020-12-15 | 华南理工大学 | Corona discharge low-temperature plasma device, litchi fresh-keeping device and litchi fresh-keeping method |
| CN112155052B (en) * | 2020-09-04 | 2024-02-06 | 华南理工大学 | Surrounding DBD low-temperature plasma device, fresh-keeping storage and transportation vehicle and fresh-keeping method |
| CN112722402A (en) * | 2021-01-25 | 2021-04-30 | 华南理工大学 | Perishable packaged food fresh-keeping device and method based on low-temperature plasma |
| CN112998065A (en) * | 2021-02-24 | 2021-06-22 | 华南理工大学 | Device and method for preventing and controlling mango anthracnose based on plasma active hot water |
| CN114040557B (en) * | 2021-11-04 | 2022-09-20 | 中船重工安谱（湖北）仪器有限公司 | Array type dielectric barrier glow discharge device |
| CN113891542A (en) * | 2021-11-09 | 2022-01-04 | 上海众英创科技有限公司 | Positive and negative ion slurry generator |
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| CN101934190A (en) * | 2010-09-14 | 2011-01-05 | 山东派力迪环保工程有限公司 | Matrix type dielectric barrier discharge plasma peculiar smell gas treatment device |
| CN204994546U (en) * | 2015-05-29 | 2016-01-27 | 深圳市同盛绿色科技有限公司 | Food storage device under normal atmospheric temperature based on plasma technique |
| CN205262024U (en) * | 2015-10-28 | 2016-05-25 | 北京昊天盛通科技有限公司 | Plasma degassing unit's refrigerator is equipped with |
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