Ultrasonic atomizer and water shortage detection device

Abstract

The invention discloses an ultrasonic atomizer and a water shortage detection device. The ultrasonic atomizer comprises a water tank (1), an atomizing sheet (2), a sensing antenna (3) and a water shortage detection device (9), wherein the sensing antenna (3) is in contact with a bottom shell of the water tank and is used for sensing whether water exists or not; the atomizing sheet (2) is mounted at the bottom of the water tank; the water shortage detection device (9) comprises a microprocessor (8), a boosting module (7), a signal rectifying and filtering module (4), a signal amplifying module(5) and a signal shaping module (6); the microprocessor (8) outputs a 3MHZ frequency to the boosting module (7); a signal is transmitted to the atomizing sheet (2) through a capacitor after voltage inversion; and when the water exists in the water tank, the high-frequency voltage signal is radiated to the sensing antenna (3) through the water as a carrier, the sensing antenna (3) obtains the signal, a direct current level is obtained through the signal rectifying and filtering module (4), and a level signal with the voltage higher than 2.5V is obtained after the direct current level passes through the signal amplifying module (5).

Description

Technical field [0001] The invention belongs to the field of electronics and relates to an ultrasonic atomizer and a water shortage detection device. Background technique [0002] Atomizer is a common device. [0003] However, the current ultrasonic atomization detection lacks the following three detection methods: [0004] 1. Reed switch plus floating ball detection method, complex structure installation, high cost, short life, dry reed is a mechanical switch with mechanical life, and looks ugly. [0005] 2. The water level probe detection method, the mold is complicated and easy to leak. At the same time, the metal probe is easy to oxidize when directly contacting water, and it is easy to fail for a long time. [0006] 3. Through the chip current detection method, when the water is lacking, the atomizing film generates a large current to determine whether there is water shortage, the disadvantage is that the power tube and the atomizing film are easy to burn. Summary of the inventio...

AI Technical Summary

Problems solved by technology

[0004] 1. The dry reed switch plus floating ball detection method, the structure and installation are complicated, the cost is high, the life is short, and the dry reed is a mechanical switch with a mechanical life and an ugly appearance.

[0005] 2. The water level probe detection method, the mold forming is complicated, and it is easy to leak. At the same time, the metal probe is easy to oxidize when it is directly exposed to water, and it is easy to fail after a long time.

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