MEMBRANE AIR DRYER WITH PRE-CHARGE VOLUME

摘要

A membrane air dryer includes a housing (44) with an air inlet (46), an a ir outlet (48), a sweep air inlet (51) and a sweep air outlet (54); and a me mbrane separator (42) having surfaces extending between and having an inlet and an outlet respectively connected to the air inlet and the air outlet. A sweep air passage in the housing extends between first and second ends of th e membrane along and includes surfaces of the membrane. The sweep air passag e has an inlet adjacent the air outlet and has an outlet adjacent the air in let and connected to the sweep air outlet. A volume (170) is concentric to t he membrane separator, has an inlet connected to the outlet of the membrane separator and has an outlet connected to the sweep air inlet. The filter may be mounted in a reservoir (26) with the membrane separator extending into t he reservoir.