Patent ID: 7448228
Filing Date: 2008-11-11
Classification: F25B

Abstract:
1. Improvement system of energy efficiency for the refrigeration cycle in which refrigerant vapor having low pressure and low temperature is compressed into one having high pressure and high temperature and then is condensed by heat-exchange with circumstances; a condensed refrigerant liquid is expanded and then is evaporated by heat-exchange with a circumstance, and by which a heating and a cooling are performed, comprising of: an auxiliary heat exchanger unit for heat-exchanging between refrigerant liquid having high pressure and refrigerant vapor having low pressure; a cabinet which houses a pressure support valve placed at an inlet of an inner pipe of the auxiliary heat exchanger unit, and a pressure of the refrigerant liquid having high pressure condensed at the outdoor heat exchanger is decreased by the pressure support valve, and a condensed pressure of the outdoor heat exchanger is maintained; a pressure compensator, consisting of a pressure compensation tank connecting to an inlet pipe of an expansion valve and storing an additional refrigerant; a first pressure check valve provided at an inlet pipe of the pressure compensation tank and being open only over the predetermined pressure of the refrigerant; and a second pressure check valve provided at an outlet pipe of the pressure compensation tank and being open only under the predetermined pressure of the refrigerant.