Heat pump with secondary loop air-conditioning system

A heater and air-conditioning assembly for a vehicle comprising;

• a compressor (12) for compressing a refrigerant,
• a front end condenser (14) in fluid communication with said compressor for condensing fluid from said compressor (12),
• a chiller-condenser (16) disposed downstream of and in fluid communication with said condenser (14),
• a chiller-evaporator (18) disposed downstream of and in fluid communication with said chiller-condenser (16),
• a main three-way valve (20) disposed between said compressor (12) and said condenser (14) for directing flow from said compressor (12) to said condenser (14) in an air-conditioning mode and for directing flow from said compressor (12) through a by-pass line (22) to said chiller-condenser (16) in a heat pump mode,
• a heat pump expansion device (24) for expanding and exchanging heat with the refrigerant in said heat pump mode, and
• an by-pass valve (26) disposed between said chiller-condenser (16) and said chiller-evaporator (18) for directing flow from said chiller-condenser (16) through said heat pump expansion device (24) and to said chiller-evaporator (18) in said heat pump mode,
• a cabin heat exchanger (36),
• a coolant feed line (34) for conducting coolant flow from said chiller-condenser (16) to said cabin heat exchanger (36),
• a coolant exit line (38) for conducting coolant from said cabin heat exchanger (36) to said chiller-evaporator (18),
• an interconnect line (40) for conducting coolant from said chiller-evaporator (18) to said chiller-condenser (16), and
• a coolant three-way valve (44) in said exit line (38) for directing coolant from said cabin heat exchanger (36) to said chiller-evaporator (18) and chiller-condenser (16) in said air conditioning mode.