Patent ID: 7353660

Claim:
An apparatus comprising: a compressor having an inlet and an outlet and at least a first port between the inlet and outlet; a condenser having an inlet coupled to the compressor outlet to receive refrigerant and having an outlet; a first evaporator having an inlet coupled to the condenser to receive refrigerant and having an outlet coupled to the compressor inlet; a second evaporator having an inlet coupled to the condenser to receive refrigerant and having an outlet coupled to the first port to return refrigerant to the compressor, bypassing a compression path between the compressor inlet and first port; and a bypass conduit extending between: a first location between the first evaporator and the compressor inlet; and a second location between the second evaporator and the first port; a first valve positioned to directly control flow through the bypass conduit; and a second valve positioned to directly control flow between the second location and the first port.