Patent ID: 7517449

Claim:
A water purification filter easily replaced by a connector, comprising: a connector including an inflow hole through which external feed water flows in, a check valve body in which a check valve installed to open/close a feed water flowing path for guiding feed water from the inflow hole to a filter side is formed and a concentrated water discharge path is formed outside the check valve, an outflow hole for externally discharging water purified by a filter, and a concentrated water control hole for externally discharging concentrated water through a concentrated water discharge path, and controlling a discharge amount of concentrated water; a filter housing for housing a reverse osmosis membrane filter, and opening the feed water flowing path by opening the check valve in connection with the connector; a locking means installed in the connector, for detachably fixing the filter housing to the connector; and a passage switching guide being installed at the upper portion of the filter housing, and having a first path for supplying feed water to the reverse osmosis membrane filter from the feed water flowing path opened when the filter housing is connected to the connector, a second path for supplying water purified by the reverse osmosis membrane filter to the outflow hole, and a third path for supplying concentrated water from the reverse osmosis membrane filter to the concentrated water discharge path; wherein the locking means comprises: a lower cover being mounted on the bottom surface of the connector, and having a through hole at its center and positioning grooves; filter support members being rotatably hinge-fixed on the positioning grooves, and having coupling grooves in an arc shape; and a lever having coupling protrusions movably coupled to the coupling grooves, and detachably locking the filter housing to the connector by rotating the filter support members by rotation by the user.