Patent ID: 11920835
Assignee: WEISS TECHNIK GMBH
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  C | IPC F

Claim 0:
1. A method for operating a cooling device, a temperature of at least −80° C. or lower being established at a heat exchanger by means of the cooling device having a cooling circuit comprising a refrigerant, the heat exchanger, an internal heat exchanger, a compressor, a condenser and a controllable expansion element of the cooling device, the refrigerant undergoing a phase transition in the heat exchanger, the refrigerant of a high-pressure side of the cooling circuit being cooled by means of the internal heat exchanger, the cooling of the refrigerant of the high-pressure side by means of the internal heat exchanger being used to reduce an evaporation temperature at the controllable expansion element, a zeotropic refrigerant being used as refrigerant,
wherein
the controllable expansion element is controlled by means of a control device of the cooling device in such a manner that the refrigerant partially freezes during an expansion at the controllable expansion element.