Patent ID: 8651331

Claim:
A refrigeration appliance with a water dispenser comprising: a refrigerated cabinet having a dispenser area; a cabinet water inlet in the refrigerated cabinet connectable to a premises water line; a valve downstream of the cabinet water inlet selectively openable to provide water from the premises water line; a cold water storage tank in the refrigerated cabinet having a tank body defining an interior volume, an inlet downstream of the valve for admitting water into the interior volume of the tank body supplied via the cabinet water inlet, and an outlet for providing water via a dispensing conduit to a dispenser in the dispenser area, the inlet including a venturi portion for creating a reduced pressure within the interior volume of the tank body via flow of water into the cold water storage tank; and an evacuation chamber in communication with the inlet via a conduit extending from the venturi portion, the evacuation chamber positioned above the interior volume of the tank body and having a vent opening vented to atmosphere, air within the evacuation chamber being in contact with water in the evacuation chamber, the evacuation chamber including a float valve for selectively closing a liquid opening in an end of the conduit when the valve is opened, a float body in the float valve floating upward to open the liquid opening and allow water to enter the evacuation chamber via the liquid opening when pressure in the interior volume of the tank body is higher than in the evacuation chamber when the valve is closed, the reduced pressure being in communication with the dispensing conduit via the outlet so that, after dispensing operation is completed, water remaining in the dispensing conduit is drawn toward the interior volume of the tank body.