Cyclone for separation of gas-liquid mixture, and a refrigerant accumulator containing this cyclone

A cyclone for separation of a gas-liquid mixture in a vehicle air conditioning system with carbon dioxide as a refrigerant, the cyclone comprising:

• an inlet for the gas-liquid mixture;
• a body of the cyclone with a cylindrical inlet chamber, a cylindrical outlet chamber, and at least one stationary vane in a shape of a helix for ensuring rotation of the gas-liquid mixture in the outlet chamber;
• and
• a deflector facing towards the cylindrical outlet chamber of the body;
• wherein the inlet is arranged substantially coaxially with an axis of the cyclone and opens directly into the inlet chamber of the body of the cyclone, wherein the cylindrical inlet chamber, the at least one stationary vane in the shape of a helix, the cylindrical outlet chamber, and the deflector are arranged sequentially in order in the cyclone with respect to the axis of the cyclone, wherein the deflector faces towards an open end of the cylindrical outlet chamber, and wherein a side opening is formed between an edge of the open end of the cylindrical outlet chamber and an outer edge of the deflector.