High-frequency and high-voltage pulse generator for sterilizing

A pulse generator, high-frequency and high-voltage technology, applied in the field of high-frequency and high-voltage pulse generators, can solve the problems of food composition changes, spark switch misconduct, and affect the stability of sterilization effects, etc., to achieve large flow capacity and reliable work Effect

Inactive Publication Date: 2016-06-22
XIAMEN UNIV
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  • Claims
  • Application Information

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

Method used

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  • High-frequency and high-voltage pulse generator for sterilizing
  • High-frequency and high-voltage pulse generator for sterilizing
  • High-frequency and high-voltage pulse generator for sterilizing

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Embodiment Construction

[0025] The present invention will be further described through specific embodiments below in conjunction with the accompanying drawings.

[0026] see Figure 1~3 , a food sterilization high-frequency high-voltage pulse generation circuit diagram, suitable for liquid food sterilization, including DC power input U dc , DSP-based sterilization signal control circuit, pulse generation circuit. The DC input terminal U dc Connect the pulse generating circuit, wherein the switch K1 in the pulse generating circuit is controlled to be turned off by the sterilization signal control circuit. The control circuit includes voltage comparator LM311, triode BD37, NAND gate chip 74HC00, PCS317 photocoupler, 24V relay and several resistors and capacitors. The I input is connected to one end of the resistor R7=10K, and the other end of R7=10K is connected to the ground in parallel with R3=1M and C7=0.1nF respectively, and connected to the non-inverting terminal (pin 2) of the voltage comparat...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M9/04A23L3/32
CPCH02M11/00A23L3/32
Inventor 何良宗张雅雯
Owner XIAMEN UNIV
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