Patent ID: 9010136
Filing Date: 2015-04-21
Classification: F25B

Abstract:
1. A method for operating a refrigeration plant, in a refrigeration mode, which comprises in a refrigeration circuit a compressor, a condenser, an expansion valve with an entrance and an exit, and an evaporator, the evaporator having a primary side and a secondary side, the evaporator being passed through on said secondary side by a secondary medium to be cooled down, whereby a heat exchanger is provided between an inlet line for the secondary medium and a refrigerant line leading from said expansion valve, such that said heat exchanger is positioned directly upstream of the entrance of said expansion valve, and whereby the method is comprised of the step of keeping constant the temperature of the refrigerant at the entrance of the expansion valve, thereby achieving a stable operation of and hence a highly efficient evaporation in the refrigeration circuit and whereby the temperature of the refrigerant at the entrance of the expansion valve is kept constant by at least partially passing a mass flow of the secondary medium after being cooled down in the evaporator through the heat exchanger in parallel or counter-flow or cross-flow with respect to the refrigerant flow by means of a first valve.