Purified water supply system with power failure reset function

Abstract

The invention discloses a purified water supply system with a power failure reset function. The purified water supply system comprises a liquid level sensor, a stop valve, a drain valve and a controlmodule, wherein the control module is used for controlling a pump, the drain valve and the stop valve to operate; during power failure reset, the preset time of opening the stop valve is controlled bythe control module, and when liquid at a water inlet is detected by the liquid level sensor, the drain valve and the stop valve are controlled to open at the same time by the control module until noliquid is detected by the liquid level sensor; the control module is further used for controlling the drain valve and the stop valve to close and controlling the pump to start when no liquid is detected by the liquid level sensor; and the control module is further used for controlling the stop valve to open when the time of starting the pump reaches a threshold. According to the purified water supply system with the power failure reset function, the device is arranged, so that when the pump is powered off and is restarted, the condition in the pump can be determined, high output of the pump isavoided, sand the pump cannot be damaged by overloading.

Description

technical field [0001] The invention relates to the technical field of water supply engineering, in particular to a clean water supply system with a power failure reset function. Background technique [0002] A pump is a machine that transports or pressurizes a liquid. It transmits the mechanical energy of the prime mover or other external energy to the liquid to increase the energy of the liquid. It is mainly used to transport liquids including water, oil, acid and alkali, emulsion, suspoemulsion and liquid metal. Liquids, gas mixtures and liquids containing suspended solids can also be transported. The technical parameters of pump performance include flow rate, suction lift, lift, shaft power, water power, efficiency, etc.; according to different working principles, it can be divided into volumetric pumps, vane pumps and other types. Positive displacement pumps use the change in the volume of their working chambers to transfer energy; vane pumps use the interaction betwe...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that when the existing centrifugal pump is restarted after power failure, the pipeline resistance cannot be judged due to the unknown situation in the pipeline, which will easily lead to excessive output of the pump, resulting in overloading of the pump and damage to the pump , the purpose is to provide a clean water supply system with a power failure reset function to solve the above problems

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