High-frequency and high-voltage pulse generator for sterilizing

Abstract

A high-frequency and high-voltage pulse generator for sterilization relates to a pulse generator. A control circuit and a pulse generating circuit are provided; the control circuit is provided with a voltage comparator, a triode, a first NAND gate, a second NAND gate, a coupler, and a relay; the pulse generating circuit is provided with a relay normally open switch, MOSFET switching tube, first transformer, second transformer, diode, capacitor, spark arrestor. Based on the traditional high-frequency pulse device, a timer based on NE555 is designed, and DSP is used to digitally process the sterilization signal, so that the interference of the sterilization circuit is greatly reduced. Capacitor charging and discharging is used to obtain high-voltage pulses, so that the output pulse can reach 12-100kV / cm, and the width is controlled at the microsecond level, and the pulse front is controlled at the nanosecond level, which can effectively sterilize and will not change the food composition. ; It can be turned on and off in an instant and has a large flow capacity and reliable operation.

Description

technical field [0001] The invention relates to a pulse generator, in particular to a high-frequency and high-voltage pulse generator for sterilization based on DSP intelligent control. Background technique [0002] In the food processing industry, the sterilization process of protecting and preserving food by killing microorganisms is a necessary process for food processing. Pasteurization, the traditional heat treatment and sterilization method, will destroy the heat-sensitive ingredients in food, such as affecting the nutrition of food, aggravating browning reaction and affecting color and luster. In the new treatment method, high-voltage pulse sterilization has the advantages of low sterilization energy consumption, high speed, and effective preservation of food nutrients. However, the continuous discharge arc will cause electrolysis loss, electrolysis chemical products and ultraviolet rays, etc., which will cause the decomposition of food components and introduce new p...

AI Technical Summary

Problems solved by technology

[0004] Since the pulse trigger part directly controls the high-voltage pulse generator, the jitter and other interference of the external power supply may lead to uneven distribution of the high-voltage pulse electric field, misconduct of the spark switch under non-working conditions, affecting the stability of the sterilization effect and even causing food Composition changes

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