Patent ID: 8746007
Filing Date: 2014-06-10
Classification: F25B

Abstract:
1. A heat converter for condensation that changes high-temperature and high-pressure refrigerant gas discharged from a compressor having a suction port of refrigerant in a refrigeration system to low-temperature refrigerant liquid, comprising: an isobaric cooling unit for cooling the high-temperature and high-pressure refrigerant gas under isobaric change; a pressure-reducing and liquefying unit for liquefying the refrigerant gas a part of which is liquefied in the isobaric cooling unit while reducing the pressure and the enthalpy of the refrigerant by an acceleration phenomenon of the refrigerant; and a pressure-reducing and cooling unit for cooling the refrigerant passed through the pressure-reducing and liquefying unit while further reducing the pressure and the enthalpy of the refrigerant along a saturated liquid line by the acceleration phenomenon of the refrigerant, and discharging the pressure-reduced and cooled refrigerant from an exit thereof, wherein respective flow passages of the isobaric cooling unit, the pressure-reducing and liquefying unit and the pressure-reducing cooling unit are designed to be narrower in inner diameter in this order, pressure of the pressure-reduced and cooled refrigerant at the exit of the pressure-reducing and cooling unit is substantially equal to pressure of the refrigerant at the refrigerant suction port of the compressor, and the isobaric cooling unit is a mini heat exchanger for liquefying 5 to 50 wt % of high-temperature and low-temperature refrigerant gas discharged from the compressor; wherein the cross-sectional area of the flow passage of the pressure-reducing and liquefying unit is set to 40 to 50% and the cross-sectional area of the flow passage of the pressure-reducing and cooling unit is set to 20 to 30% with respect to the cross-sectional area of the flow passage of the isobaric cooling unit.