a pre-filter

Abstract

A pre-filter includes an upper body and a lower body, a filter cavity is formed in the upper body and the lower body, a diverter is connected to the side, and the diverter is connected through the filter cavity; it also includes: an automatic exhaust mechanism; a magnetic rod assembly, Connected to the lower end of the lower body, the magnetic rod assembly extends into the filter cavity, and the magnetic field generated by the magnetic rod assembly absorbs the magnetic impurities carried in the water flow; the filter screen surrounds the magnetic rod assembly inside, and the filter screen is densely covered with sieve holes. The invention realizes 24-hour automatic air release, no noise during automatic air release, and achieves the effect of silent air release. The invention also adopts different filtration and retention methods according to the different impurities in the pipes of the heating system to ensure smooth geothermal heating. .

Description

technical field [0001] The invention relates to the field of HVAC water purification treatment, in particular to a pre-filter, which discharges gas in some closed-circulation fluid systems in time to remove mud sand, casting residues, rust and other impurities in pipes. Background technique [0002] Air and impurity separators are generally used in heating systems, especially in return pipes. There are two main sources of air in the pipes; one is direct intake, the pipes that are not initially filled with water or the intake when they are emptied during use, or When the pipeline forms a negative pressure, the air that has passed through the seal is not tight; the second is to dissolve the air in the water, because we know that a small amount of air can be dissolved in the water, and the air is also adsorbed in the small holes on the surface of the container wall, and these small bubbles form. The role of gasification nuclei. [0003] The solubility of water to air and the a...

AI Technical Summary

Problems solved by technology

When water is heated, air bubbles are a continuous process, and the gas in the water pipe is very harmful to the heating system. On the one hand, it is mainly manifested in increasing the friction along the way, increasing the local resistance, and causing the water pressure in the pipe to be distorted. On the other hand, most of the radiators we use are made of cast iron. The sand mold residues and other impurities in the radiators cannot be completely washed during engineering installation. In addition, the water in the heating system is always in a closed cycle. The heating part of the boiler does not have a filter screen, so the rust residue inside the radiator and the pipe and the impurities of the water itself will enter the heat exchanger again through the circulating water pump of the wall-hung boiler. Part of it becomes scale and adheres to the inner wall of the heat exchanger to make its pipe diameter thinner, so that the pressure of the circulating water pump is further increased. Long-term operation will cause the speed of the circulating water pump to decrease or even get stuck, seriously affecting its service life.

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