A compartment switch circuit for automatic ventilation in public toilets

Abstract

An interval switch circuit for automatic ventilation in public toilets, which relates to an automatic switch circuit, which consists of an interface, a rectifier integrated block, a drop resistor, a filter capacitor, a voltage regulator diode, a timing resistor, a timing capacitor, a discharge diode, and a NOT gate a, NOT gate b, delay resistor, delay capacitor, NOT gate c, drive resistor and one-way thyristor, the second leg of the timing resistor is connected to the positive pole of the timing capacitor, the input terminal of NOT gate a and the discharge diode The anode of the NOT gate a is connected to the input of the NOT gate b, the output of the NOT gate b is connected to the first pin of the delay resistor and the first pin of the drive resistor, and the second pin of the delay resistor is connected to The positive pole of the delay capacitor is connected to the input terminal of the NOT gate c, and the output terminal of the NOT gate c is connected to the cathode of the discharge diode; the second leg of the driving resistor is connected to the control pole of the one-way thyristor. The invention performs ventilation in the public restroom in the mode of starting up at intervals, so as to save electric energy and prolong the service life of the exhaust fan.

Description

technical field [0001] The invention relates to electronic circuits, in particular to an automatic switch circuit. Background technique [0002] There are public restrooms in stations, docks, airports, office buildings, hospitals, shopping malls and other places. Many public restrooms that cannot be naturally ventilated need to be ventilated frequently to eliminate odors and improve air quality. Manually switching exhaust fans for ventilation is a common method. , but manual operation often causes unpleasant odors in the bathroom or wastes electric energy due to failure to turn on or off the exhaust fan in time. Contents of the invention [0003] The purpose of the present invention is to provide an interval switch circuit for automatic ventilation in public toilets, so that the exhaust fan is automatically opened according to the set interval time, and then automatically closed after a certain time delay, so as to realize automatic ventilation in public toilets, so that t...

AI Technical Summary

Problems solved by technology

[0002] There are public restrooms in stations, docks, airports, office buildings, hospitals, shopping malls and other places. Many public restrooms that cannot be naturally ventilated need to be ventilated frequently to eliminate odors and improve air quality. Manually switching exhaust fans for ventilation is a common method. , but manual operation often causes unpleasant odors in the bathroom or wastes electricity due to failure to turn on or off the exhaust fan in time

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