Method for monitoring a refrigerant fill-quantity in a refrigeration machine, refrigeration machine, and motor vehicle

A method for monitoring a refrigerant fill-quantity of a refrigeration machine, which has a compressor for compression of the refrigerant, an expansion device for pressure relief of the refrigerant, a high-pressure heat exchanger, through which the refrigerant is passed through after compression by the compressor, in order to transfer heat to a heat exchange medium comprising air, and a low-pressure heat exchanger, through which the refrigerant is passed through after pressure relief by the expansion device, in order to absorb heat from the heat exchange medium or another heat exchange medium, wherein fill level information relating to the refrigerant fill-quantity is determined as a function of multiple operating parameters,

• wherein the method comprises determining the fill level information independently of the temperature of the refrigerant after compression by the compressor such that the temperature of the refrigerant after compression by the compressor is not used for calculation of the fill level information, wherein a temperature of the heat exchange medium or of the other heat exchange medium is used as one of the operating parameters, wherein, when a notification condition dependent on the fill level information is met, the method further comprises controlling a notification device in order to provide a notification to a user or an external device;
• and wherein the fill level information is determined by an algorithm that is parameterized by a machine learning method.