Patent ID: 6119478
Filing Date: 2000-09-19
Classification: F25B

Abstract:
A refrigeration apparatus comprising:(a) a primary refrigerant circuit (10) which is formed of a combination of a compressor (13), a heat source side heat exchanger (12), decompression means (15), and a primary side (2a) of a refrigerant-refrigerant (R--R) heat exchanger (2) that are connected together by a primary line (11), said primary refrigerant circuit (10) being charged with a primary side refrigerant;(b) a secondary refrigerant circuit (20) which is formed of a combination of a secondary side (2b) of said R--R heat exchanger (2) and a use side heat exchanger (22) that are connected together by a secondary line (21), said secondary refrigerant circuit (20) being charged with a secondary side refrigerant of the same type of said primary side refrigerant; and(c) refrigerant carrying means (M) for circulating said second side refrigerant through said secondary refrigerant circuit (20),wherein said primary line (11) is greater in allowable pressure than said secondary line (21).