Device and method for fresh-keeping fruits and vegetables based on single-array dielectric barrier discharge plasma

A technology of dielectric barrier discharge and plasma, which is applied in plasma, preservation of fruits and vegetables, and preservation of fruits and vegetables through radiation/electrical treatment, etc. It can solve the problem of inability to achieve all-round freshness of fruits and vegetables, prolong the shelf life of vegetables and food, and the design is too simple and other issues, to achieve the effect of reducing the cost of use and user threshold, shortening the processing time, and reducing the waste of fruits and vegetables

Active Publication Date: 2021-09-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent 201710255637.9 discloses a method that closely combines modified atmosphere preservation technology with low-temperature plasma sterilization to significantly prolong the shelf life of vegetables and foods by more than 15 days (see South China University of Technology's invention patent application "A method and device for vegetable preservation", The publication date is September 15, 2017, and the publication number is CN 107156279A), but the design is too simple, there are safety hazards in the plasma excitation process, and it is impossible to achieve all-round preservation of fruits and vegetables

Method used

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  • Device and method for fresh-keeping fruits and vegetables based on single-array dielectric barrier discharge plasma
  • Device and method for fresh-keeping fruits and vegetables based on single-array dielectric barrier discharge plasma

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Embodiment 1

[0049] The fruit and vegetable fresh-keeping method of the present embodiment comprises the following steps:

[0050] (1) Place the freshly picked lychees on the shelf of the refrigerator after sorting;

[0051] (2) Start the plasma fruit and vegetable fresh-keeping device, and use the circulating cold air to pre-cool the fruits and vegetables;

[0052] (3) Start the single-array dielectric barrier discharge plasma excitation device, and first perform the initial deep treatment;

[0053] (4) Subsequent start-up of the single-array dielectric barrier discharge plasma excitation device for intermittent processing as required.

[0054] Specifically, after starting the refrigerator and the plasma generator, when the air flows between the electrodes, the plasma oxidation active components excited and generated between the electrodes are distributed in the refrigerator through the flowing cold wind, so that all-round freshness of fruits and vegetables can be carried out. The tempe...

Embodiment 2

[0057] The fruit and vegetable preservation device based on this embodiment is the same as that of Embodiment 1.

[0058] The fruit and vegetable fresh-keeping method of the present embodiment comprises the following steps:

[0059] (1) Freshly picked tomatoes are placed on trays after selection;

[0060] (2) Start the plasma fruit and vegetable fresh-keeping device, and use the circulating cold air to pre-cool the fruits and vegetables;

[0061] (3) Start the single-array dielectric barrier discharge plasma excitation device, and first perform the initial deep treatment;

[0062] (4) Subsequent start-up of the single-array dielectric barrier discharge plasma excitation device for intermittent processing as required.

[0063] Specifically, after starting the refrigerator and the plasma generator, when the air flows through between the electrodes, the plasma oxidation active components excited and generated between the electrodes are distributed in the refrigerator through th...

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Abstract

The invention belongs to the field of refrigerating and fresh-keeping of fruits and vegetables, and relates to a fresh-keeping device for fruits and vegetables based on a single-array dielectric barrier discharge plasma. In the device, a single-array dielectric barrier discharge plasma excitation device is installed in the shelf of the air-cooled refrigerator, wherein the single-array dielectric barrier discharge plasma excitation device includes: electrodes, discharge medium, fixing device, electrode lead wires, Transformer, pulse power supply and discharge area; the discharge medium wraps the electrode and is fixed in the shelf by the fixing device, and the two ends of the electrode are provided with insulating caps, which are sealed with the discharge medium, and are connected to the transformer and the pulse power supply through the electrode lead wire , the discharge region is between adjacent discharge media. The invention adopts a pulsed plasma exciter, and the intermittent treatment mode is mild and energy-saving; the plasma adopts a normal pressure air excitation mode, which can carry out comprehensive preservation of fruits and vegetables. The invention also provides a fresh-keeping method for fruits and vegetables based on a single-array dielectric barrier discharge plasma.

Description

technical field [0001] The invention relates to the field of refrigeration and preservation of fruits and vegetables, in particular to a device and method for preserving fruits and vegetables based on single-array dielectric barrier discharge plasma. [0002] technical background [0003] As people pay more attention to the freshness of fruits and vegetables, air-cooled frost-free has become the technological development trend and the mainstream means of fresh-keeping in the freezer fresh-keeping industry, but there are still inevitable defects in the cold-keeping fresh-keeping technology. The current refrigerated temperature (2-8°C) can only inhibit the growth and reproduction of some microorganisms, and generally cannot inhibit the growth of psychrophilic bacteria (such as Yarrowia, Listeria and Pseudomonas), nor can it achieve real-time on-line sterilization and To purify the air, it cannot effectively prevent the browning of fruits and vegetables and the degradation of et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05H1/24A23B7/148A23B7/04A23B7/015
CPCA23B7/015A23B7/0425A23B7/148
Inventor 孙大文潘园园成军虎韩忠韩永旭
Owner SOUTH CHINA UNIV OF TECH
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