Prefilter

Abstract

A prefilter comprises a connecting part, a bottle body, a flexible scraping swob, a filter cartridge, a rotary component, a drainage tube and a blow-down valve, and is characterized in that a body of the connecting part is provided with a water inlet, a water outlet, a bottle body connector, a filter core connector, a drainage tube connector and a blow-down valve connector, wherein one end of the drainage tube is fixedly connected with the drainage tube connector; one end of the filter cartridge is connected with the filter cartridge connector, and the other end sleeves the outside of the drainage tube and sealing match is formed at the contact position of the other end; one end of the bottle body is connected and fixed with the bottle connector by threads, and the other end is provided with the rotary component; the flexible scraping swob is arranged on the inner wall of the bottle body or on the rotary component, and is always in close contact with the outer surface of the filter cartridge; the blow-down valve connector is arranged at the bottom end of an interlayer formed between the inner wall of the bottle body and the outer wall of the filter cartridge and is communicated with the interlayer, and the blow-down valve and the blow-down valve connector are connected. As a preference, a three-way valve is further arranged in the connecting part.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a pre-filter technology. Background technique [0002] With the advancement of science and technology and the improvement of people's living standards, people began to have higher requirements for water and dietary health in daily life. Due to secondary pollution such as rust and sediment in the water supply of the city, the water quality of household water deteriorates and the control of water equipment fails, and the life of other household appliances involving water is shortened, and even a huge safety hazard is generated. Therefore, From the perspective of the general environment, every household needs to install a pre-filter to improve water quality and protect household water equipment. The pre-filter is the nemesis of secondary pollution and a reliable impurity filtering device. [0003] At present, the pre-filters in the market mainly include forward flushing ty...

AI Technical Summary

Problems solved by technology

[0006] Chinese patent: 201510243765.2 (application number) announced a new technology, its invention name is "two-way powerful spray washing pre-filter", which integrates two functions of forward flushing and backwashing, basically solving the current problems in the market. The existence of the built-in filter only has the disadvantage of one-way flushing function, but the internal structure is too complicated, the water flow is affected and the manufacturing cost is high

[0007] At present, compared with other pre-filters, the backwash pre-filter has some improvements in technology, but when encountering the intercepted matter clogged in the filter mesh, it is necessary to open the filter bottle to take out the filter mesh, and use an auxiliary filter to remove the filter. Cleaning tools such as brushes (which can be replaced by toothbrushes), air guns, etc. also bring troubles to users

[0008] At present, the pre-filters on the market are roughly T-shaped. For the owners of the old residential areas that have been renovated, if this T-shaped pre-filter is to be retrofitted and connected later, due to the limited space in the water meter box Restricted, difficult to retrofit

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