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A water full detection circuit

A detection circuit, full of water technology, applied in the field of automatic control, full of water detection, to ensure stability, normal operation and service life

Active Publication Date: 2019-03-22
HAIER YOUJIA INTELLIGENT TECH (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems described above

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Embodiment Construction

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0034] The present invention uses the conduction and cut-off of the triode under different signals to carry out the circuit layout, and through the introduction of two...

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Abstract

The invention provides a water fullness detection circuit which comprises a first triode P1, a second triode P2, a third triode P3, a fourth triode P4, a first biasing resistor Rb1, a second biasing resistor Rb2, a pull-down resistor R0, a first collecting end J1, a second collecting end J2, a first input end I1, a second input end I2 and an output end O1. According to the water fullness detection circuit, the basic components such as the resistors and the triodes are adopted, the resistance of water is utilized to trigger water fullness signals, a single-chip microcomputer is utilized to collect the water fullness signals, and an alarm signal is triggered. According to the water fullness detection circuit, a current varying in directions is generated in water by communication and shutdown of the triodes under different signals, the influence of water electrolysis on detection signals is effectively solved, signal stability and detection result reliability are ensured, and thus normal operation and the service life of a device are effectively ensured.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to the technical field of full water detection. Background technique [0002] The full water detection function is required in many household appliances, such as washing machines, dishwashers, water heaters, heating furnaces and other household appliances. The current water full detection scheme is roughly divided into two types: one is to use a physical method to place a float in the water. Using the circuit to directly detect water is also using the conductivity of water to obtain a certain voltage signal by detecting the resistance of the water, or using the resistance of the water and the capacitance in the circuit to generate oscillations to detect the frequency signal. [0003] The scheme of using the float switch to detect the full water has obvious disadvantages: firstly, the cost is high, and secondly, the service life is not long. Because the switch is in a hum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/24
CPCG01F23/24
Inventor 麻文山
Owner HAIER YOUJIA INTELLIGENT TECH (BEIJING) CO LTD