Heat exchanger for automotive air conditioning system has high-pressure and low-pressure units

摘要

An automotive heat pump circuit (1) has a compressor that inducts and compresses a coolant, and a first heat exchanger (2) that heats a fluid circulating in a circuit (W1) under the influence of a high-pressure coolant from the compressor. A second heat exchanger (3) heats a second fluid that circulates in a second circuit (W2) under the influence of a high-pressure coolant emerging from the first high-pressure heat exchanger. A first high-pressure heat exchanger (59) heats a third fluid using heat from the first fluid. A second heat high-pressure exchanger (60) heats the third fluid using heat from the second fluid. A decompression unit (7, 10) decompresses the high-pressure coolant emerging from the second high pressure heat exchanger, and a low-pressure heat exchanger (4, 8) evaporates the decompressed low-pressure coolant.