Water purification device liquid level control system

Abstract

The invention discloses a liquid level control system of a water purification device. The liquid level control system comprises a power supply circuit, a water level monitoring circuit, a single chip microcomputer control circuit and a drive circuit. The opening / closing of the water level monitoring circuit is controlled by the water level of the water purification device; the water level monitoring circuit is used for sending a low level signal to the single chip microcomputer control circuit when opened and sending an up level signal to the single chip microcomputer control circuit when closed, meanwhile, the water level monitoring circuit is used for receiving a series of pulse signals, simulating AC signals, with the equal amplitude. The single chip microcomputer control circuit is used for receiving electrical signals output by the water level monitoring circuit; when receiving the low level signal, the single chip microcomputer control circuit performs continue excitation to the drive circuit; when receiving the up level signal, the single chip microcomputer control circuit does not output signals. The drive circuit is used for receiving electrical signals output by the single chip microcomputer control circuit, and drives a motor to supply water to the water purification device when receiving a low level signal, otherwise the motor does not work. The liquid level control system can produce weak and intermittent AC signals in purified water and is used for collecting the AC signals, thereby accurately controlling the water supply of the water purification device.

Description

technical field [0001] The invention relates to a liquid level control technology, in particular to a liquid level control system of a water purification device. Background technique [0002] In terms of water purification liquid level control, the traditional mechanical control is no longer widely used at present, but the electric control method is mostly used to control the water level. While adopting the electronic control method, it will also bring a series of new problems, such as: corrosion of electrodes in contact with water, water pollution caused by electrode corrosion, electricity safety issues, etc. Especially for water purification devices, these problems constitute the problem of drinking safety; at the same time, because it involves water purification, the purity of water is high, which puts forward requirements for the strength of the electrical signal, too high will speed up the electrode. Corrosion brings about the problem of electricity safety; too low inc...

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Problems solved by technology

While adopting the electronic control method, it will also bring a series of new problems, such as: corrosion of electrodes in contact with water, water pollution caused by electrode corrosion, electricity safety issues, etc.

Especially for water purification devices, these problems constitute the problem of drinking safety; at the same time, because it involves water purification, the purity of water is high, which puts forward requirements for the strength of the electrical signal, too high will speed up the electrode. Corrosion brings about the problem of electricity safety; too low increases the difficulty of monitoring electrical signals

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