Gas-liquid separator and air conditioning system of vehicle

A gas-liquid separator for an air conditioning system of a vehicle, wherein the gas-liquid separator comprises:

• a housing having a liquid inlet, a liquid outlet, an air inlet and an air outlet;
• a middle cylinder arranged in the housing, wherein an upper end of the middle cylinder is provided with a separation recess, a first flow channel is formed between an inner surface of the housing and an outer surface of the middle cylinder, the first flow channel is configured to communicate the air inlet and the separation recess;
• an inner cylinder at least partially accommodated in the middle cylinder, wherein a second flow channel is formed between at least part of an outer surface of the inner cylinder and an inner surface of the middle cylinder, the second flow channel is configured to communicate the separation recess and the air outlet;
• a third flow channel is formed in the inner cylinder, and the third flow channel is configured to communicate the liquid inlet with the liquid outlet.