Fruit and vegetable preservation device and method based on single-array dielectric barrier discharge plasma

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 a single-array dielectric barrier dischargeplasma. The device is characterized in that a single-array dielectric barrier discharge plasma excitation device is mounted in a storage rack of an air-cooled refrigerated cabinet, wherein the single-array dielectric barrier discharge plasma excitation device comprises an electrode, discharge mediums, a fixing device, electrode leading-out wires, a transformer, a pulse power supply and discharge areas; the discharge mediums wrap the electrode and is fixed in the storage rack through the fixing device; insulating sealing caps are arranged at two ends of the electrode; the insulating sealing caps are hermetically connected with the discharge mediums and are connected with the transformer and the pulse power supply through the electrode leading-out wires; and the discharge areas are arrangedbetween the adjacent discharge mediums. The 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 comprehensive fruit and vegetable preservation can be carried out. The invention further provides a fruit and vegetable preservation method based on the 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...

AI Technical Summary

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

Images