a pre-filter

Abstract

The invention discloses a front filter which comprises an upper cover, a cylinder, a magnetization filter element and a spiral filter element, wherein the cylinder is fixed at the lower end of the upper cover; the magnetization filter element and the spiral filter element are arranged inside the cylinder; the bottom end of the upper end is opened; a water inlet and a water outlet which are isolated from each other are formed in two sides of the upper cover; the inner end of the water outlet extends downwards to form a filtration connector; the upper end of the cylinder is opened; the opening in the upper end of the cylinder is in sealed connection with the opening in the bottom end of the upper cover; the magnetization filter element is arranged in the center of the cylinder; the spiral filter element is arranged around the magnetization filter element. The magnetization filter element comprises a columnar magnetic core and outer tubes, wherein the columnar magnetic core is arranged in the center of the cylinder; the side wall of the top of the columnar magnetic core is in sealed connection with the filtration connector; the outer tubes are arranged at the periphery of the columnar magnetic core at intervals; inlets are formed in the side surfaces of the upper ends of the outer tubes; outlets which are communicated with the filtration connector are formed in the side surface of the upper end of the columnar magnetic core; the inlets and the outlets are opposite in direction. By adopting the spiral filtering net structure, not only is the filtration area increased, but also a cleaning function of a filtering net is achieved, and meanwhile due to arrangement of the magnetization filter element, filtered water can be sufficiently magnetized, so that the descaling purpose is achieved.

Description

technical field [0001] The invention relates to a pre-filter. Background technique [0002] The pre-filter is usually installed after the water meter of the water inlet pipe to ensure that a large amount of precipitated impurities generated in the pipe network will not cause harm to the human body, and it plays a positive role in protecting the concealed pipes, faucets, electrical appliances, etc. [0003] There are four main types of pre-filters on the market today: [0004] 1. Laminated filter is a thin and specific plastic laminate with a large number of micron-sized grooves engraved on both sides. When a series of laminates of the same pattern are compressed by spring and liquid pressure on a specially designed inner support, The grooves between the laminations intersect to form a series of filter cells of around 100 microns. Disadvantages: incomplete washing of impurities, uneven filtration accuracy, and no sewage outlet. [0005] 2. Shunflush pre-filters, most of wh...

AI Technical Summary

Problems solved by technology

Disadvantages: incomplete washing of impurities, uneven filtration accuracy, no sewage outlet

Disadvantages: If the water quality is poor, or the consumer's habits are not good, the filter element is easy to be blocked, not only the small impurities cannot be washed out, but they are embedded deeper and tighter in the filter element, which is easy to form secondary pollution, and the shell can only be opened Take out the filter element and scrub it with a toothbrush

Disadvantages: complex product structure, incomplete flushing, such as poor water quality, some impurities are embedded deeper and tighter in the filter element, and finally the filter element is blocked, causing secondary pollution. Once blocked, it is very difficult to maintain. Most of the production of siphon type product filtration Accuracy is above 50 microns

Disadvantages: Backwash pre-filter When backwashing, unpurified tap water enters the clean water side of the filter screen, which will cause pollution of the clean water side of the filter screen for a long time; at the same time, the flushing is not thorough

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