Refrigerated display case

A refrigerated display case (20) having at least one unit composed of a plurality of wall assemblies, namely a bottom assembly (22.3), a rear wall assembly, and a top assembly (22.1), which delimit a cooling space at a bottom side, a rear side, and a top side, and having a cooling unit (1) whose components include at least one evaporator (11), one condenser (13, 13′), and one electric control unit (15),

• the cooling unit (1) including at least two closed refrigerant circuits (10, 10′) conveying propane as a refrigerant, at least one compressor (12, 12′),
• wherein propane is the refrigerant conveyed in the cooling unit (1), and in order to variably control the a cooling output, the at least one compressor (12, 12′) is embodied with a speed regulation and the at least one compressor (12, 12′) is embodied for operation at a constant speed,
• wherein the propane capacity of the respective refrigerant circuits (10, 10′) is ≤150 g each, and
• wherein a required cooling output is covered by the at least one compressor (12) with constant speed and that for covering fluctuations in the required cooling output the supplied cooling output is adjusted by means of the at least one speed-regulatable compressor (12′).