Current control circuit and electrode water level monitoring device

Abstract

The invention relates to a current control circuit and an electrode water level monitoring device. The current control circuit comprises a triode Q1, a triode Q2, a triode Q3, a triode Q4 and a control circuit. The control circuit outputs a first pulse signal and a second pulse signal opposite in waveform according to the set period. A source electrode s1 of the triode Q1 and a source electrode s2 of the triode Q3 are connected, and work currents are introduced. A grid electrode g1 of the triode Q1 and a grid electrode g2 of the triode Q2 are connected, and the first pulse signal is introduced. A grid electrode g3 of the triode Q3 and a grid electrode g4 of the triode Q4 are connected, and the second pulse signal is introduced. A drain electrode d1 of the triode Q1 and a drain electrode d2 of the triode Q2 are connected, and are connected with a first electrode. A drain electrode d3 of the triode Q3 and a drain electrode d4 of the triode Q4 are connected and are connected with a second electrode. A source electrode s2 of the triode Q2 and a source electrode s4 of the triode Q4 are connected and grounded. According to the technology, electrode oxidizing and rusting or liquid impurity adsorbing caused by long-time alternating-current voltages is avoided, the conductive performance of the electrodes is ensured, wrong judgment on the liquid level is reduced, and the monitoring accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of electrode water level monitoring, in particular to a current control circuit and an electrode water level monitoring device. Background technique [0002] The water level switch is a switch used to control the liquid level. It is mainly divided into contact type and non-contact type in form. Among them, the contact float type liquid level switch is the most widely used. In many industrial production processes, water level switches are often used to judge liquid state, measure liquid height, volume, etc. For example, in recent years, with the shortage of water resources and the improvement of market requirements for energy saving and environmental protection performance of home appliances, for example, In Europe and North America, the water-saving indicators for home appliances have entered the legislative process, and good water-saving performance has become an important technical development trend of th...

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Problems solved by technology

[0004] But when it is actually used, this switch has a disadvantage. Applying AC voltage to the two electrodes for a long time will easily cause the electrodes to oxidize and rust or absorb a large amount of impurities in the liquid, resulting in the electrodes being unable to conduct electricity, or the conduction signal is intermittent. Occurs, reducing the accuracy of liquid level monitoring

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