Patent ID: 7325747

Claim:
A flow control valve system, comprising: a flow sensor configured to sense flow of a mixed fluid that includes at least a first fluid and a second fluid; and a valve including a flow regulator operatively coupled to the flow sensor to regulate the flow of the mixed fluid based on the flow of the mixed fluid sensed by the flow sensor, the flow regulator defining at least in part a first flow opening through which the first fluid flows, the flow regulator being configured to shrink the first flow opening to reduce flow of the first fluid upon a decrease in the flow of the mixed fluid at the flow sensor and to enlarge the first flow opening to increase flow of the first fluid upon an increase in the flow of the mixed fluid at the flow sensor, and a mixture regulator defining at least in part the first flow opening, the mixture regulator being configured to regulate a mixture ratio of the first fluid and the second fluid in the mixed fluid by at least adjusting size of the first flow opening.