Patent ID: 8419512

Claim:
A heating, cooling, and ventilation system for an associated vehicle, the associated vehicle including a body and an engine, the body including a cabin defining an interior portion of the associated vehicle, the system comprising: a first refrigerant compressor selectively coupled to a shaft of the engine of the associated vehicle, the first compressor including an inlet and an outlet; a second refrigerant compressor selectively connected to an electrical power source of the associated vehicle, the second compressor including an inlet and an outlet; a first refrigerant-to-air heat exchanger (RTAX) in fluid communication with air in the interior portion of the associated vehicle; a second RTAX secured to the body of the associated vehicle and in fluid communication with air exterior to the cabin of the associated vehicle; a valve member including a cooling position and heating position, the valve member operatively connecting the inlets of the first and second compressors to a refrigerant outlet of the first RTAX while connecting the outlets of the first and second compressors to a refrigerant inlet of the second RTAX when the valve member is in the cooling position, the valve member operatively connecting the outlets of the first and second compressors to a refrigerant inlet of the first RTAX while connecting the inlets of the first and second compressors to a refrigerant outlet of the second RTAX when the valve member is in the heating position; a blower mounted to the associated vehicle and configured to move air through the first RTAX; a nuclear-biological-chemical (NBC) filtration unit secured to the associated vehicle and in fluid communication with air exterior to the cabin of the associated vehicle; and a controller capable of selectively activating one or more of the first compressor and the second compressor while placing the valve member into one of the cooling position and the heating position, based upon one or more system inputs.