Expansion device for air conditioning loop in motor vehicle, uses capillary expansion unit to lower pressure of fluid emerging from condenser to improve transition from fluid to gaseous state

摘要

The refrigerant loop includes an expansion unit (40) to lower pressure of fluid emerging from the condenser, and an evaporator (5) to return fluid to the gaseous state. The expansion device is between condenser output and evaporator input, and is a capillary tube of diameter less than that of the conduit (62) connecting evaporator to condenser. This conduit partly houses the capillary tube.