Refrigerant Line With Inner Heat EXCHANGER

WARNING: This page is about a different car, the 2023 Audi S3, 2023 Audi RS 3, 2023 Audi A3 Quattro, and 2023 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

In this refrigerant line, the warm liquid refrigerant flowing on the high pressure side releases energy into the gaseous or vaporous cold refrigerant flowing on the low pressure side. This increases the cooling efficiency of the A/C system.

Fig 1: Identifying Refrigerant Pipe With Inner Heat Exchanger
Courtesy of AUDI OF AMERICA, LLC

NOTE:

This illustration shows a refrigerant line with an inner heat exchanger as it is installed on for example the Golf 7, the Audi A4 from MY 2008 and on the Audi A5 Coupe from MY 2008. Refer to Refrigerant Circuit (vehicle-specific Service Information).

A - Refrigerant line with inner heat exchanger

B - Channels in the refrigerant line, in which the warm liquid refrigerant flows to the evaporator (refrigerant circuit high pressure side)

C - Channel in the refrigerant line, in which the gaseous or vaporous cold refrigerant flows to the A/C compressor (refrigerant circuit low-pressure side)