Patent ID: 6298683
Filing Date: 2001-10-09
Classification: F25B

Abstract:
A refrigeration system comprising:a first refrigeration circuit (1) for a refrigerating apparatus (6A), said first refrigeration circuit (1) being formed into a two-stage cascade refrigerating cycle by establishing connection between a high temperature-side refrigerant circuit (3) and a low temperature-side refrigerant circuit (4) through a refrigerant heat exchanger (5); anda second refrigeration circuit (2) which is formed into a refrigerating cycle different from that of said first refrigeration circuit (1);wherein a liquid piping line (15a) of said high temperature-side refrigerant circuit (3) and a liquid piping line (36a) of said second refrigeration circuit (2) are connected together through a first connection piping line (41) and wherein a suction-side gas piping line (15b) of said high temperature-side refrigerant circuit (3) and a suction-side gas piping line (36b) of said second refrigeration circuit (2) are connected together through a second connection piping line (42);said refrigeration system further comprising:switching means (43, 44) for selective circulation of a refrigerant of said second refrigeration circuit (2) to said refrigerant heat exchanger (5) of said first refrigeration circuit (1) through each of said connection piping lines (41, 42).