Composite high voltage pulse electric field, and electric field sterilization device and method

Abstract

The invention relates to the field of electric pulse generation, biomedicine and food processing, and provides a composite high voltage pulse electric field, and an electric field sterilization device and method in view of the problems in the prior art. A microsecond high voltage pulse generation circuit and a nanosecond high voltage pulse generation circuit are triggered by a trigger control circuit that integrates electric parameter detection with waveform parameter control, in order to output microsecond and nanosecond high voltage pulse signals according to a set pulse waveform parameter and a time sequence, the microsecond and nanosecond high voltage pulse signals are loaded to a sterilization processor together, the composite high voltage pulse electric field with a preset waveform structure is loaded on the sterilization processor to load a microsecond-nanosecond composite high voltage pulse electric field on a processed material so as to form dual inhibition of survival ability and fertility of bacteria, thereby improving the sterilization efficiency of the pulse electric field, and prolonging the expiration date of the processed material.

Description

technical field [0001] The invention relates to the fields of electric pulse generation, biomedicine and food processing, in particular to a compound high-voltage pulse electric field, an electric field sterilization device and method. Background technique [0002] In the fields of food processing and medical treatment, sterilization is a crucial work. At present, the sterilization methods used in industry include heat sterilization, chemical agent sterilization, strong light sterilization, etc. Although these sterilization methods can kill bacteria, the existence of these sterilization methods may cause changes in the composition of the processed object or chemical residues, etc. problems, which have certain limitations in its application. For example, heat sterilization often changes the physical or chemical properties of the processed object (such as food), resulting in changes in its color, aroma, taste, organizational structure, and decline in nutritional value, seriou...

AI Technical Summary

Problems solved by technology

However, at present, such devices are basically sterilized by a high-voltage pulsed electric field with a width greater than a few microseconds. Simply using this electric field sterilization method, due to the breakdown field of the bacteria-containing liquid (such as fresh milk or freshly squeezed juice), It is strongly related to the electric field duration t (basically with t -1 / 3 (minus one-third power) in a linear relationship), the larger the pulse width, the lower the breakdown field strength, and the lower the pulse electric field strength allowed to be loaded. Therefore, it is difficult to achieve high field strength and high-efficiency sterilization, and for Spores or viruses in bacteria-containing liquids have little effect and do not have a broad spectrum

Images