Patent ID: 6997183

Claim:
A breathing gas humidifier system comprising: a replaceable and closed water reservoir with stable pressure, said water reservoir being provided for receiving a water reserve for the breathing gas humidifier system; an intermediate storage unit with water, said intermediate storage being closed from the environment and being located under the water reservoir and having a connector; a reservoir valve associated with said water reservoir; an intermediate storage unit valve associated with said intermediate storage unit, said reservoir valve and said intermediate storage unit valve cooperating to provide a water flow connection between said water reservoir and said intermediate storage unit only when the water reservoir is received in said connector; a heated evaporator chamber with an outlet connected to a breathing gas line and to a patient; a water connection line located below a water level of said intermediate storage unit, said intermediate storage unit being connected via said water connection line to said heated evaporator chamber, said outlet opening above water in said heated evaporator chamber, the water evaporating at the boiling point passing via the outlet into the breathing gas line to the patient; and a gas pressure equalizing line located between said heated evaporator chamber and said intermediate storage unit.