Backflushing type water filter

Abstract

The invention relates to the field of water filters, in particular to a backflushing type water filter which comprises a shell, a water inlet pipe connected with a tap water pipe is fixed to the upperend face of the shell, a blow-off pipe is fixed to one side of the bottom of the shell, a valve is fixed to the blow-off pipe, and a mounting groove is formed in the bottom of the shell. A filter device is fixed to the position of the mounting groove and comprises a sealing cover assembled with the mounting groove, a water outlet pipe is fixed to the bottom of the sealing cover, a filter screen is further fixed to the portion, in the shell, of the sealing cover, and a backwashing device is fixed to the interior of the filter screen; and the backwashing device comprises a supporting plate anda connecting plate which are arranged on the two sides of the interior of the filter screen, a supporting shaft is fixed to the top of the supporting plate, and a water guide plate is further fixed between the supporting plate and the connecting plate. Self-rotation of the water guide plate is achieved through the water guide plate structure, the baffle rotates along with the water guide plate topush water in the filter screen to back flush the filter screen, and impurities can be effectively prevented from being attached to the outer wall of the filter screen.

Description

【Technical field】 [0001] The invention relates to the field of water filters, in particular to a recoil type water filter. 【Background technique】 [0002] The filter screens of the pre-filters all use sintered screens. Since the screens are used for a long time, in the process of filtering impurities in the pipeline, washing the impurities on the screens is a very important technical barrier. At present, most manufacturers use two types of flushing: the first is positive flushing, which is the same as the product filtration direction and process; the second is reverse flushing, flushing from the inside and outside of the filter together. [0003] The above two methods are used to flush impurities along the direction of the original filtration waterway. Such flushing methods have the following disadvantages: the flushing direction is the same as the filtering direction, and the flushing efficiency is not high and not thorough. Reason: Since the filtering method of the waterw...

AI Technical Summary

Problems solved by technology

[0003] The above two methods are used to flush impurities along the direction of the original filtration waterway. This flushing method has the following disadvantages: the flushing direction is the same as the filtering direction, and the flushing efficiency is not high and not thorough.

Reason: Since the filtering method of the waterway protector is to separate the particulate impurities in the tap water through the interception of the filter screen, most of the particulate impurities are attached to the filter screen. When the washing direction is the same as the filtering direction, these particles on the filter screen Particles and impurities are protected by the gaps in the filter and cannot be flushed from the front, so the flushing is not clean

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