Pre-positioned filter

Abstract

The invention discloses a pre-positioned filter. The filter comprises an upper body and a lower body; a filter cavity is formed in the upper body and the lower body; a steering gear is connected to the side of the pre-positioned filter and communicated with the filter cavity. The pre-positioned filter further comprises an automatic exhaust mechanism, a magnetic rod assembly and a filter screen; the magnetic rod assembly is connected to the lower end of the lower body; the magnetic rod assembly extends into the filter cavity; a magnetic field generated by the magnetic rod assembly adsorbs magnetic impurities carried in water flow; the filter screen surrounds the magnetic rod assembly, and sieve pores are densely distributed in the filter screen. 24-hour full-automatic deflation is achieved,no noise is generated during automatic exhaust, the mute exhaust effect is achieved, different filtering retention modes are adopted according to the difference of impurities in a heating system pipeline, and smooth heating of terrestrial heat is guaranteed.

Description

Technical field[0001]The invention relates to the field of HVAC and 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 pipelines.Background technique[0002]Air and impurity separators are generally used in heating systems, especially in the return pipeline. The main sources of air in the pipeline are two aspects; one is direct air intake, the initial water-filled pipe or the air intake when it is emptied during use, or When the pipe is under negative pressure, the air passed from the place where the seal is not tight; the second is the dissolved air in the water, because we know that a small amount of air can be dissolved in the water, and the small cavities on the surface of the container wall also adsorb air, and these small bubbles cause The role of gasification nuclear.[0003]The solubility of water to air and the amount of air adsorpt...

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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