Water level detection system

Abstract

A water level detection system comprises a water containing device, a first slide rheostat, a sensor, a frequency-to-voltage converter, a comparison circuit and an indicating module, where the water containing device comprises a water tank, a floating block floating on the water surface of the water tank and a connecting part connected with the floating block; the first slide rheostat is connected with the connecting part; the sensor is connected with the first slide rheostat; the frequency-to-voltage converter is connected with the sensor; the comparison circuit is connected with the frequency-to-voltage converter; the indicating module is connected with the comparison circuit; the floating block is used for being driven by rising and falling of the water level to drive a slide end of the first slide rheostat to move so as to change the voltage of the sensor; the sensor is used for changing the capacitance according to changes of the voltage so as to change the voltage output by the frequency-to-voltage converter; the comparison circuit is used for comparing the voltage output by the frequency-to-voltage converter with a reference voltage so as to determine whether the indicating module is to be started or not.

Description

technical field [0001] The invention relates to a water level detection system, in particular to a water level detection system for judging a water tank in an automatic vending machine. Background technique [0002] A current vending machine uses a compressor for cooling and heating. During the cooling and heating process, condensed water will be generated. The water in the water tank of the condensed water will often overflow due to overfilling, and a large amount of condensed water will overflow, which will easily cause personnel Slipping and equipment damage, etc., may also cause a short circuit of the equipment and cause hazardous accidents. Contents of the invention [0003] In view of the above, it is necessary to provide a water level detection system for real-time monitoring and indication of the tank water level. [0004] A water level detection system applied to an electronic device, comprising a water holding device installed in the electronic device, the water...

AI Technical Summary

Problems solved by technology

[0002] A current vending machine uses a compressor for cooling and heating. During the cooling and heating process, condensed water will be generated. The water in the water tank of the condensed water will often overflow due to overfilling, and a large amount of condensed water will overflow, which will easily cause personnel Slipping and equipment damage, etc., may also lead to short-circuiting of equipment and equipment, resulting in hazardous accidents

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