Water filter and operating principle thereof

Abstract

The invention relates to a water filter and an operating principle thereof. The water filter comprises a tank cylinder, a bottom cover and a filter screen cylinder, wherein a water inlet, a water outlet, a back-washing inlet and a sewage draining opening are formed in the side surface of the tank cylinder; an upper flow guide cover is arranged at the upper part in the tank cylinder, and a lower flow guide cover is arranged at the lower part in the tank cylinder; a water inlet flow guide cavity is formed between the upper flow guide cover and the tank cylinder; the water inlet corresponds to the side surface of the upper flow guide cover in the water inlet flow guide cavity; a sewage draining flow guide cavity is formed between the lower flow guide cover and the bottom of the tank cylinder; the sewage draining opening corresponds to the side surface of the lower flow guide cover in the sewage draining flow guide cavity; the filter screen cylinder is limited between the upper flow guide cover and the lower flow guide cover; the area in the filter screen cylinder is communicated with the water inlet flow guide cavity and the sewage draining flow guide cavity. The operating principle is that through controlling the inlets in the side surface of the tank cylinder, when water flows to the area outside the cylinder from the area inside the filter screen cylinder, the filtering is realized, and the back-washing is realized when water flows to the area inside the cylinder from the area outside the filter screen cylinder. The water filter is relatively simple in structure, easy to mount and use, relatively convenient for filter and backwashing, and better in effect, thereby being suitable for being used as a water filtering device.

Description

technical field [0001] The invention relates to a water filtering device, which is a water filter and its working principle. Background technique [0002] At present, there are many sources of domestic water, mainly provided by local waterworks. Although the water quality has been treated before leaving the factory and meets domestic water standards, various water quality problems, such as odor and turbidity, can still be found in domestic water, which makes people doubt whether the water quality is qualified. Qualified water quality is obviously not conducive to human health. For this reason, prior art discloses some household water quality filters, although can play the effect of filtering and purifying, but itself does not have self-cleaning function, after long-term use, purifying effect becomes worse, needs to be replaced regularly, and cost is higher, and repeatedly Replacement is more complicated. [0003] Such as the authorized announcement number CN101451642B pub...

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Problems solved by technology

[0004] In order to overcome the above disadvantages, the purpose of the present invention is to provide the field with a water filter suitable for domestic water or industrial water filtration and its worki...

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