Abstract: An evaporator for use in a refrigeration system includes one or more Coanda evaporation chambers having an integrated, internal expansion device. The internal expansion device is a linear atomization tube having a plurality of ejection holes arranged in a series of spiral rows. Liquid refrigerant introduced into the linear atomization to is ejected onto the inner wall of the Coanda evaporation chamber, covering it completely with a thin layer of liquid refrigerant. Liquid refrigerant is fed to the linear atomization device in a series of rapid pulses.

Abstract: An evaporator for use in a refrigeration system includes one or more Coanda evaporation chambers having an integrated, internal expansion device. The internal expansion device is a linear atomization tube having a plurality of ejection holes arranged in a series of spiral rows. Liquid refrigerant introduced into the linear atomization to is ejected onto the inner wall of the Coanda evaporation chamber, covering it completely with a thin layer of liquid refrigerant. Liquid refrigerant is fed to the linear atomization device in a series of rapid pulses.

Abstract: A compression refrigeration system and evaporator having multiple circuits. Spray nozzles are provided for atomization and expansion of the refrigerant. The atomizing spray nozzles are interposed in each evaporator circuit and the nozzles are sized to distribute atomized refrigerant to the various evaporator circuits based on airflow rates across the associated circuit.

Abstract: A system for atomizing the refrigerant directed to an evaporator in a vapor compression refrigeration system using spray nozzles. In one embodiment, one or more spray nozzles discharge into a distributor which is connected via a plurality of conduits to the various evaporator circuits. The distributor is designed to deliver a volume of refrigerant to each circuit based on airflow rates across the circuit. In another embodiment, an atomizing spray nozzle is interposed in each evaporator circuit and the nozzles are sized to distribute atomized refrigerant to the various evaporator circuits based on airflow rates. The invention also comprehends a method if improving the efficiency of existing system by replacing conventional expansion devices with spray nozzles sized in each circuit in relation to the airflow.

Abstract: An expansion device for refrigeration system having a piston which reciprocates to either open or close ports to increase or decrease the volume of atomized refrigerant liquid received from the condenser. Atomization may be enhanced by use of auxiliary ultrasonic or electrostatic atomization devices.