Combined cooling unit and heat pump circuit including for motor vehicles has valve system to keep inner heat transmitter at a higher pressure than in the cooling circuit

摘要

A combined cooling unit and heat pump circuit comprises a compressor (1), multiway valve (2), external (3) and internal (6) heat transmitters and an inner heat transmitter (4). There is a multiway valve (9) in the cooling circuit. The inner heat transmitter (8) of the cooling circuit is at a lower pressure than the inner heat transmitter (41).