Importance

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Abstract

A refrigerant recovery system for use in combination with a low pressure recovery reservoir to recover refrigerants such as CFC, HCFC and HFC from a air conditioning or refrigeration system selectively operable in a plurality of system operating modes including a pressurization mode, a liquid refrigerant recovery mode and a vapor refrigerant recovery mode comprising a system control including a microprocessor to control the operation of the refrigerant recovery system and a plurality of control sensors to monitor a corresponding plurality of system operating parameters, a refrigerant processor operatively coupled to the low pressure recovery tank and the air conditioning or refrigeration system by a fluid conduit network including a plurality of fluid conduits and a fluid flow control including a plurality of fluid flow control devices coupled to the microprocessor to receive control signals therefrom and operatively disposed relative to the fluid conduit network to selectively configure the fluid conduit network to control the flow of the refrigerant therethrough in a plurality of operating configurations corresponding to the plurality of system operating modes in response to the state of the plurality of system operating parameters sensed by the plurality of control sensors to transfer refrigerant from the air conditioning or refrigeration system to the low pressure recovery reservoir.

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First Claim