Liquid pressure amplification with superheat suppression

An air-conditioning or refrigeration system comprising:

• a compressor, a condenser, an expansion valve, an evaporator, and conduit means interconnecting the compressor, condenser, expansion valve and evaporator in series in a closed loop for circulating refrigerant therethrough, the conduit means including:
• first conduit means coupling an outlet of the compressor to an inlet to the condenser to convey superheated vapor refrigerant from the compressor into the condenser at a first pressure and temperature;
• centrifugal pump means having an inlet coupled to an outlet of the condenser for receiving condensed liquid refrigerant at a second pressure less than said first pressure and boosting the second pressure of the condensed liquid refrigerant by a substantially constant increment of pressure within a predetermined range to discharge the condensed liquid refrigerant from an outlet of the pump means at a third pressure greater than said second pressure;
• second conduit means for transmitting a first portion of the condensed liquid refrigerant from outlet of the pump means through the expansion valve into the evaporator to vaporize and effect cooling for air conditioning or refrigeration;
• and
• third conduit means coupling the outlet of the pump means the condenser for transmitting a second portion of the condensed liquid refrigerant from outlet of the pump means at said third pressure into the condenser together with the superheated vapor refrigerant to vaporize the liquid refrigerant therein and effect cooling of the superheated vapor refrigerant entering the condenser to a reduced temperature, thereby reducing said first pressure, the second portion being less than the first portion.