Patent ID: 8141381
Filing Date: 2012-03-27
Classification: F25B

Abstract:
1. A vapor compression refrigerating cycle apparatus comprising: a compressor, a condenser, a regeneration heat exchanger, an expansion device, and an evaporator connected in series; an injection device that injects liquid refrigerant; and a controller that controls refrigerating capacity, wherein the vapor compression refrigerating cycle apparatus carries out a cycle corresponding to a reversed Ericsson cycle in which isothermal heat dissipation process and isothermal heat absorption process occur overstriding a saturated vapor line and a saturated liquid line respectively, and heat exchange is carried out between isobaric heat dissipation process in a liquid zone and isobaric heat absorption process in a superheated vapor zone, wherein process part occurring in a superheated vapor zone of the isothermal heat dissipation process in the reversed Ericsson cycle is substituted by adiabatic compression process and isobaric heat dissipation process, the adiabatic compression being carried out by the compressor and the isobaric heat dissipation being carried out in the condenser together with remaining process part occurring in the superheated vapor zone of the isothermal heat dissipation process under isothermal and isobaric condition, wherein part of the isobaric heat dissipation process in the liquid zone is carried out in the regeneration heat exchanger by releasing heat from refrigerant liquid in the liquid zone to refrigerant vapor entering the compressor, wherein remaining process part of the isobaric heat dissipation process in the liquid zone is substituted by isenthalpic or isentropic expansion, the expansion being carried out by the expansion device, and expanded refrigerant is introduced to the evaporator to carry out isothermal and isobaric heat absorption and then to be sucked into the compressor, wherein the regeneration heat exchanger is located so that its vapor side is between the evaporator and the compressor, and its liquid side is between the condenser and the expansion means device, wherein the controller controls the refrigerating capacity by controlling dryness of refrigerant vapor entering the vapor side of the regeneration heat exchanger, and wherein the injection device injects part of the liquid refrigerant introduced from part between a liquid outlet of the regeneration heat exchanger and an inlet of the expansion device into the compressor to control refrigerant temperature at an outlet of the compressor to be a prescribed temperature.