Central air conditioner filtering system and filtering method thereof

Abstract

The invention relates to the technical field of cleaning devices and provides a central air conditioner filtering system, which comprises a circulating water pipeline and an electric control box for controlling the circulating water pipeline to operate according to a set order; at least one group of filtering devices in parallel connection and a water drain pipeline controlled by a fourth electrically operated valve are arranged between a water inlet pipe and a water return pipe; each group of the filtering devices comprises a first electrically operated valve arranged at a water inlet end of a filter and a second electrically operated valve arranged at a water outlet end of the filter; a pressure gauge and a pressure senor are arranged on the filter; a water flow sensor is arranged between the filter and the second electrically operated valve; a water drain pipe is arranged between the filter and the first electrically operated valve; a third electrically operated valve is arranged on the water drain pipe; a filter screen is arranged in the filter. According to the central air conditioner filtering system and the filtering method, through repeated circular filtering and back washing, the operation cost of central air conditioner is reduced, the effects of energy conservation and environmental protection are realized, and economic benefits and social benefits are realized.

Description

technical field [0001] The invention relates to the technical field of central cleaning devices, in particular to a central air-conditioning filter system and a filter method thereof. Background technique [0002] At present, in the circulating water system of the central air-conditioning system, the unstable water quality can easily lead to adverse consequences such as system fouling, corrosion, biological slime, and bacteria and algae. During the operation cycle of central air-conditioning circulating water, the concentration of various salts increases accordingly. When the concentration of Cl and SO4 ions is high, the anti-corrosion performance of the metal surface protective film will be reduced. In particular, Cl has a small ionic radius and strong penetrability, which can easily destroy the protective film on the metal surface and increase the anodic process speed of its corrosion reaction, causing localized corrosion of the metal. The growth of microorganisms in wate...

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Problems solved by technology

Scale adhesion in equipment pipes: The thermal conductivity of scale is extremely low, which reduces heat transfer efficiency or uneven heat transfer, affects the cooling effect of central air conditioning, increases the pressure of the condenser, increases the pressure difference between the front and back of the compressor, and increases the load on the motor. Cause high-voltage operation, increase power consumption, and in severe cases, directly cause high-voltage accident shutdown of the main engine

Reduce the water circulation of the system: deposits, such as scale and microbial slime, cover the central air-conditioning water system equipment pipes or the surface of the heat exchanger flow channel, which will seriously block the pipes, hinder water flow, reduce the circulation of chilled water, and improve the heat exchange efficiency. Further decrease

Corrosion often causes rust residues to fall off the inner walls of system pipes and equipment, which will block the coils, reduce the heat exchange effect of the air conditioner, and cause major downtime accidents such as perforation and leakage in severe cases; at the same time, the existence of corrosion also shortens the service life of the equipment. to shorten

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