Patent ID: 9662604
Date: 2017-05-30
CPC Classifications: B01D

Claim:
1. A filter unit comprising: a filtration system comprising a dirty air section, a cleaned air section and a plurality of cassette filters disposed between the dirty air section and the clean air section, wherein the cleaned air section comprises at least one outlet for air cleaned by the plurality of cassette filters; wherein the at least one outlet is attached to a clean air plenum in fluid communication with an exhaust air fan and an exhaust chimney, wherein the exhaust fan generates an air flow so that fluid flows from the filtration system, into the clean air plenum and out of the chimney; wherein the filter unit further comprises a telescopic cleaning system for cleaning the plurality of cassette filters, wherein the telescopic cleaning system comprises: a vertical linear shaft holding the telescopic cleaning head wherein the vertical linear shaft is configured for driving the telescopic cleaning head up and down in the Y axis; two horizontal linear shafts holding the telescopic cleaning head and the vertical linear shaft, the horizontal shafts driving the telescopic cleaning head and the vertical linear shaft forward and backward in the X axis; an air inlet to connect the accelerated cleaning air to the telescopic cleaning head; a piping to transfer air from a discharge end of the exhaust air fan to the air inlet of the telescopic cleaning head; and a conically narrowing unit on the piping to generate the accelerated cleaning air from the exhaust fan discharge, the conically narrowing unit working as an accelerator with Bernoulli principle to speed up the air to be supplied to the telescopic cleaning head.