The present invention employs cross-flow to extend operation time of filtration
devices and to increase filtration efficiency. The filtration device with cross-flow
function consists of a filter, a case for containing the filter and a diffuser.
There are an inlet and an outlet set on the case. The diffuser is set inside the
filter along longitudinal direction. The diffuser consists of a reducing section,
a throat section and a flared section for producing cross-flow so as to prevent
the impurities and particles in the fluid to form cake on the inner surface of
filter, so the operation time is therefore greatly increased. A drain outlet is
set for adjusting the impurities and particles concentrations of the fluid inside
the filter for further extending the effective operation time.
