Heating/cooling circuit for hybrid vehicle and electric car, has medium pressure heat exchanger through which air is made to flow, where refrigerant arrives at compressor low pressure input at low pressure level by low pressure exchanger

摘要

The circuit (1) has a refrigeration compressor (2) comprising a low pressure input (3), a medium pressure input (4) and a high pressure output (5), and a high pressure expansion device (13) to be expanded from a high pressure level (p2) to a medium pressure level (P1) by a refrigerant. Air (12) is made to flow through a medium pressure heat exchanger (14), through which the refrigerant absorbs heat from the air. The refrigerant arrives at the low pressure input of the refrigeration compressor at low pressure level by using a low pressure heat exchanger (24).