Water purification apparatus with backflush

Abstract

The invention relates to water treatment industry, in particular to the depth-type filtration and purification of drinking water. The invention discloses a water purifier having backwashing, comprising an engine seat and a filter element, wherein, the engine seat also internally comprises a dual-interface waterway switcher which is composed of an upper disc, a middle disc and a lower disc that are respectively provided with a water switching hole, and a gland cover; the gland cover are contacted and matched with the upper disc, the middle disc and the lower disc as well as the engine seat; the waterway switcher has 4-8 equivalent switching positions, and the water switching hole of the upper disc is respectively communicated with A and B independent waterway channels; the middle disc together with the upper and the lower discs and the engine seat forms a sealing inner cavity communicated with a C waterway channel and can rotate to simultaneously seal and switch the two switching interfaces; the communication relation among the water switching holes of the three discs can be changed along with the rotation of the middle disc. The water purifier has the advantages of simple and practical structure, low cost, easy control of the assembling quality and good effect on backwashing.

Description

technical field [0001] The invention relates to the water treatment industry, and specifically relates to the deep filtration and purification of drinking water. Background technique [0002] At present, water purifiers are relatively popular in China. When using water, the water purifier is used to filter the water and the impurities caused by the water pipeline in depth, which better protects the health of users. Yet, along with the popularization of water purifier, their defect and deficiency also gradually exposed in application aspect. After the filter element of the water purifier is used for a period of time, the filter material of the filter element is gradually blocked by impurities and adsorbed on the outer surface of the filter material, resulting in a significant decline in filtration and adsorption effects. The "pollution" degree of the filter element impurities exceeds the "pollution" degree of the drinking water itself, so that the filter element becomes a n...

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Problems solved by technology

However, since the outlet and the water inlet are on the same side of the filter layer, the effect of flushing the filter layer is very poor. Reverse flushing of the water port to flush out the impurities trapped in the filter element

However, due to the need to be equipped with a power supply system, electronic control system, timing device, multiple solenoid valves, etc., the price is very high. Therefore, although this type of water purifier has a better effect, the price is very high and it is not easy to promote.

Moreover, the front and rear stages of existing water purifiers mostly use screen-type filter materials, and the intermediate stage is a structure of granular filter materials. It is difficult to remove the impurities accumulated in the middle and permeated screens in the rear stage by using the reverse full recoil mode. After passing through the multi-stage filter element, it is completely discharged from the water inlet, and the intermediate impurities are often washed back and forth in the forward and reverse directions and cannot be discharged; the water purifier without the "backwash" function, because the user is worried that the purification effect will decline. The fast stability is poor, and the filter element is afraid of excessively intercepting impurities and causing secondary pollution, so it is unwilling to use

In addition, the water purifier has a single function and poor adaptability

Generally, it is a mode of small flow and fine filtration, which is limited to drinking water, and there is a lack of models that can take into account the dual functions of drinking and washing

However, water purifiers with washing flow are often expensive and bulky.

Above-mentioned defect and deficiency cause water purifier to be difficult to obtain wider popularization

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