Prefilter

Abstract

A prefilter comprises a connecting part, a filtering part and a drain valve sequentially from top to bottom, wherein a source water inlet is formed in one side of the connecting part, and a filter water outlet is formed in the other side corresponding to the one side; a filtering part port is arranged at a port of the lower end part of the connecting part, a filter core port is arranged in the lower end part of the connecting part, wherein the filter core port is concentric with the filtering part port; the filtering part sequentially comprises a filtering part sleeve, a filter core and a scrapping device from outside to inside; one end of the scraping device is fixed in the filter core port and integrally located in the filter core; one end of the filter core is arranged outside the filter core port in a sleeving manner, and drives the filter core to integrally rotate when the drain valve is rotated, so as to form a relative scraping movement between the surface of a filter screen and the scraping device to achieve a purpose of removing impurities on the surface of the filter screen. Preferably, a T-shaped three-way valve is also arranged in the connecting part, a waterflow direction is switched by adjusting the T-shaped three-way valve, so that the waterflow reversely enters the filter core to realize reverse flushing on the impurities on the surface of the filter screen.

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

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