The use of refrigerant tubing for a vehicle air conditioning system

摘要

Tubing for use in carrying a refrigerant in a vehicle air conditioning system, and in particular a CO2 refrigerant comprises a flexible bundle of metal capillary tubes (2). Each of the capillary tubes (2) preferably has an internal diameter in the range of 2.0 to 3.0 mm inclusive. Advantageously, the bundle is encased in an elastomeric material (3). Such tubing (1) is sufficiently flexible to compensate for the relative movement of the engine with respect to the vehicle body and is capable of withstanding the mechanical stresses to which it will be subjected.