Pre-filter with double-layered filter screens and working method thereof

Abstract

The invention relates to a pre-filter with double-layered filter screens and a working method thereof. The pre-filter with the double-layered filter screens is characterized by comprising a filter shell body, a filter element and a changeover valve which are arranged in the filter shell body, and a valve head set connected onto the filter shell body; the filter element is provided with two layers of filter screens which are arranged in a sleeving manner; the valve head set is mounted at a first end of the filter element; the changeover valve is mounted at a second end of the filter element; a first separation cavity is formed between the outer-layer filter screen of the filter element and an inner wall of the filter shell body; a second separation cavity is formed between the inner-layer and outer-layer filter screens of the filter element; a filter screen inner cavity of the filter element is a third separation cavity; and the changeover valve is used for changing over the connection and disconnection of the first separation cavity and the second separation cavity. The pre-filter with the double-layered filter screens is simple in structure and reasonable in design; functions of filtering and forward and backward washing the inner-layer and outer-layer filter screens are easily realized; and the pre-filter with the double-layered filter screens is efficient and practical.

Description

technical field [0001] The invention relates to a double-layer filter screen pre-filter and a working method thereof. Background technique [0002] The working principle of the pre-filter is physical screening. The filter element is mainly stainless steel mesh. The main interceptors are large particles such as sediment, rust, and algae. It protects waterways and household water equipment, and is the first line of defense for the whole house's water use. [0003] The precision of the stainless steel mesh plays a key role in the filtering effect: if the precision is too low, the filtering effect will be poor and there will be no protective effect; if the filtering precision is too high, the filter element will easily become fouled and need to be cleaned frequently. [0004] In view of the above problems, the current solution on the market is that the same product is equipped with filter elements of various precisions, which are sold differently according to the water quality i...

AI Technical Summary

Problems solved by technology

[0003] The precision of the stainless steel mesh plays a key role in the filtering effect: if the precision is too low, the filtering effect is not good, and there is no protective effect; if the filtering precision is too high, the filter element is easy to be polluted and needs to be cleaned frequently

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