Heat pump apparatus for regulating motor vehicle temperature

摘要

This temperature regulation apparatus comprises a heat pump ( 12 ) comprising a main compression circuit ( 14 ) for a refrigerant fluid taking heat from a cold source ( 16 ) and transferring it to a hot source ( 18 ). The cold source ( 16 ) comprises a first heat exchanger ( 24 ) for exchanging heat between the refrigerant fluid and a coolant liquid thermally coupling the main refrigerant circuit ( 14 ) to a first secondary coolant circuit ( 26 ) capable of being selectively connected to an "outside" heat exchanger ( 30 ) and to a "cold" heat exchanger ( 32 ). The hot source ( 18 ) comprises a second heat exchanger ( 34 ) for exchanging heat between the refrigerant fluid and a coolant liquid thermally coupling the main refrigerant circuit ( 14 ) to a second secondary coolant circuit ( 36 ) capable of being selectively connected to at least the outside heat exchanger ( 30 ) and to a "hot" heat exchanger ( 39 ). The invention is applicable in particular to air conditioning a motor vehicle cabin and/or to regulating the temperature of a part of said vehicle.