Overcurrent protection device of ozone generator
An ozone generator and over-current protection technology, applied in the fields of detection, control, and biochemistry, can solve the problems of signal synchronization, power amplification, affecting system reliability and application range, etc., and achieve the effect of consistent working frequency
Active Publication Date: 2012-07-25
XIAN FEISIDA AUTOMATION ENG
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Problems solved by technology
[0004] However, most of the commonly used ozone generators currently use a pulse-controlled push-pull circuit to drive the high-voltage pack, and the high-voltage pack outputs high voltage to drive the ozone generating tube, etc. After the dielectric breakdown in the ozone generator, the power amplification and the high-voltage pack are often And the ozone generator is burned, and the ozone generation will be greatly reduced if the shutdown time is too long, which will seriously affect the reliability and application range of the system; Many ozone water treatment systems are not working properly, and it is difficult to effectively promote and use them at home and abroad
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[0014] refer to figure 1 — figure 2 .
[0015] 1. After the ozone generator breaks down the medium, the limited feedback voltage signal is obtained through the current detection of the high voltage package. The signal is delayed by integration, and the delay time is in accordance with the frequency of the system control signal, the duty cycle and the duration of the ozone generator to allow the breakdown of the medium Determine and pre-set in the system;
[0016] 2. According to the pre-set delay time, the feedback signal is shaped by the AND gate and used as the clock pulse CP of the D flip-flop. The input signal D is the limited feedback voltage signal. When the time after the ozone generator breaks through the medium exceeds the set value The CP pulse has a rising edge, so that the output Q is positive, and the turn-off signal of the control signal PWM is generated to the base of the switching transistor, the switching transistor and the power amplifier are turned off; ...
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In order to overcome the technical defect that the protection circuit of the traditional ozone generator is difficult in synchronous switching off, the invention provides an overcurrent protection device of an ozone generator, which is used for detecting a feedback voltage signal through a high-pressure coil current. The feedback voltage signal is shaped according to preset delay time and then a power amplifier tube is switched off. A protection device switch control signal and a system control signal PWM (Pulse Width Modulation) pulse are synchronized through power supply control, and consistency of system working frequencies is ensured.
Description
technical field [0001] The invention relates to an ozone generator overcurrent protection device and belongs to the technical fields of detection, control, biochemistry and the like. Background technique [0002] With the rapid development of contemporary society, water pollution is becoming more and more serious, and the comprehensive treatment of wastewater has become a major problem that needs to be solved urgently in the contemporary environment. At the beginning of the 20th century, wastewater purification technology has basically formed a treatment method that is now generally called a conventional treatment process, that is, coagulation, sedimentation or clarification, filtration and disinfection. However, in the 1980s and 1990s, the micro-pollution of the water body intensified, making it difficult to meet the requirements of only treating the source water with traditional water treatment processes, and advanced treatment was necessary. Therefore, chemical water tre...
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Inventor 史忠科
Owner XIAN FEISIDA AUTOMATION ENG