Patent ID: 8113008
Filing Date: 2012-02-14
Classification: F25B

Abstract:
1. A refrigeration circuit having a refrigerant circulating therein, said refrigeration circuit enabling a transcritical operation, said refrigeration circuit comprising, in the direction of flow: a condenser/gascooler ( 1 ); a collecting container ( 3 ); a relief device (b, c); an evaporator (E 2 , E 3 ); and a compressor unit ( 6 ) compressing the refrigerant to a pressure between 10 and 120 bar, wherein: an intermediate relief device (a) is arranged between the condenser ( 1 ) and the collecting container ( 3 ), the intermediate relief device relieving downstream pressure to an intermediate pressure of 5-40 bar; a gas space of the collecting container ( 3 ) is connected or connectable ( 11 , 12 ) to an input of the compressor unit ( 6 ); a relief valve (e) is in a connection line ( 11 , 12 ) between the gas space of the collecting container ( 3 ) and the input of the compressor unit ( 6 ); a line ( 2 ) from the condenser/gascooler ( 1 ) divides into a first line section ( 2 ′) and into a second line section ( 13 ); in the second line section ( 13 ) a relief valve is arranged; the refrigerant in the second line section ( 13 ) is evaporated in the heat transfer means (E 1 ) against the refrigerant in the first line section ( 2 ′); a pressure line ( 7 ) is connected or connectable to a line ( 2 , 2 ′, 2 ″) connecting the condenser/gascooler ( 1 ) and the collecting container ( 3 ); and a line ( 18 ) having a valve (i) provided therein connects a first line section ( 2 ′) after the heat transfer means (E 1 ) with the pressure line ( 7 ) after the compressor unit ( 6 ).