Compressor type refrigerator

The condenser is mounted above the evaporator and the connecting pipe between them for the refrigerant has a vertical or at least upward sloping section with a flow restrictor downstream of it in which there are two chokes, one causing 5-25% of the total pressure drop and the firest 95-75% of the drop and operating esp. on the critical flow regime whilst the other operates outside that regime. Increased thermodynamic efficiency is attained by limiting possibility of gas short circuit, to an amt. which maintains stability.