Liquid pressure cycle having an ejector

Abstract

The liquid pressure cycle having an ejector pressurizes the liquid refrigerant of the system with a positive displacement rotary pump rather than pressurizing the vapor refrigerant with a vapor compressor. This high-pressure liquid proceeds into two pressure streams. The first stream is directed to an expansion valve then on to an evaporator for space air or other medium cooling. The second stream is directed to the driving force input port of an ejector. This high-pressure input mixes with the low-pressure output from the evaporator. The result of this mixing provides for sufficient pressure enhancement to condense the combination refrigerant vapor as it passes through the condenser. The liquid flow from the condenser proceeds back to the liquid pressure pump and the cycle is repeated.

1 . A liquid pressure cycle comprising:
 a positive displacement rotary liquid pump for high pressure generation;   an expansion valve disposed at the outlet side of the high-pressure liquid pump;   an evaporator for evaporating low-pressure refrigerant after being decompressed by an expansion valve;   an ejector for mixing high-pressure and low-pressure refrigerant streams whose combined output pressure is enhanced and sent to a condenser;   a condenser for cooling and condensing refrigerant discharged from the ejector.