Backflush front filter with multiple filtering functions

Abstract

The invention discloses a backflush front filter with multiple filtering functions. The backflush front filter comprises a reversing valve body, a valve core component and a filter screen component, wherein the reversing valve body comprises a casing; the casing comprises an inner cavity for water flow to flow in and out, and an outer cavity arranged along the outer side of the inner cavity; the casing is provided with a first port connected with the filter screen component, a second port connected with the valve core component and enabling the valve core component to move in the inner cavity,and a third port; the inner cavity is communicated with the outer cavity at the first port; a communicating hole communicated with the inner cavity and the outer cavity is formed in a position closeto the second port; the filter screen component comprises a filter screen body and a water flow discharge channel. The backflush front filter can switch water flow direction, has filtering, flushing and back flushing functions, meanwhile, can thoroughly flush impurities embedded in a filter screen and different to flush through inverted flowing water flow when being flushed, and can flush the inner wall of the filter screen.

Description

technical field [0001] The invention relates to the field of water purification, more specifically, it relates to a recoil pre-filter with multiple filtering functions. Background technique [0002] The pre-filter is generally installed behind the water meter, and its main function is to restore the tap water to the standard before leaving the factory and protect downstream equipment. The city’s water supply pipelines are old and long. Impurities such as corrosion and sediment in the pipelines will not only cause brown water and control failures of water equipment, such as dripping water from faucets, blockage and rupture of heat exchanger pipes, but also impurities will precipitate on the pipelines. On the one hand, It provides a breeding ground for the growth of bacteria, and on the other hand, it will form galvanic substances, which can cause corrosion or perforation of metal pipes in just a few months. The pre-filter is a filtering device for water in the whole house, w...

AI Technical Summary

Problems solved by technology

[0003] The current pre-filter has the following problems: the filter with only filtering function, when cleaning, the pipeline is cut off and the filter is disassembled for cleaning, which is complicated and time-consuming; the pre-filter with the cleaning function has a certain It has the cleaning function, but because the impurities are embedded in the filter element hole of the filter net, it cannot be thoroughly cleaned, resulting in the growth of bacteria. If you want to clean it, you have to cut off the pipeline to dismantle and wash the filter element assembly; the front flushing function If the water quality is poor or consumers have bad habits, the filter element will be easily blocked, not only the smaller impurities cannot be washed out, but will be embedded deeper and tighter in the filter element, which will easily cause secondary pollution and can only be opened. The housing takes out the filter element and brushes it with a toothbrush. The cleaning efficiency is low and it is easy to damage the components; the pre-filter with recoil function can only achieve one layer of filter mesh filtration, and cannot achieve multiple filtration, and the filtration effect is poor.

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