Atmospheric-pressure-differential low-temperature-plasma cold sterilization and fresh keeping device and operation method

Abstract

The present invention discloses an atmospheric-pressure-differential low-temperature-plasma cold sterilization and fresh keeping device and an operation method, and relates to an experimental device for sterilizing the interior of a food package. A device main body structurally comprises a plasma module and a high-voltage differential power supply, wherein the high-voltage differential power supply comprises two groups of power supplies A and B, voltages output by the two groups of power supplies are same in amplitude and opposite in phase; and the plasma module comprises two groups of differential electrodes a and b and a lifting device, the electrodes b are fixed electrodes, the electrodes a are movable electrodes, and the electrodes are fixed to the lifting device, so that the distancebetween the upper and lower electrodes is adjusted and different experimental requirements are met. The cold sterilization and fresh keeping device takes the good sterilization and enzyme inactivationeffects, thereby effectively avoiding secondary pollution after food packaging; and the device also can automatically adjust the distance between the upper and lower electrodes according to the sizeof a packaging bag, thereby completing sterilization and enzyme inactivation tasks.

Description

technical field [0001] The invention is a fresh-keeping device for cold sterilizing fruits and vegetables, medicinal materials and food by using low-temperature plasma. Background technique [0002] At present, the sterilization technology of ingredients, medicinal materials and food used in industry is traditionally thermal sterilization (moist heat, dry heat, microwave, etc.). This method has two disadvantages. One is that in the process of heating and sterilization, the high temperature will also destroy the nutritional components of the food itself; Secondary pollution problem. [0003] In recent years, some new cold sterilization methods have appeared, such as radiation, ultraviolet rays, pulses, etc. These methods can avoid the problems caused by heating, but there is no effective solution to the secondary pollution caused by packaging. [0004] By using the plasma generated by the differential high-voltage electric field, the food inside the packaging bag (box) can ...

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Problems solved by technology

[0005] In order to solve the problem of bactericidal inactivation of fruits and vegetables, medicinal materials, food, etc., the present invention provides an atmospheric pressure differential low-temperature plasma cold sterilization and preservation equipment and its operation method

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