Air conditioning system

The utility model provides an air conditioning system which is characterized by comprising a compressor, a four-way reversing valve, a heat exchanger set, a monitoring unit and an adjusting unit. Wherein the compressor, the four-way reversing valve and the heat exchanger set are connected to form a first loop, and the first loop is used for refrigerating or heating a target environment; the monitoring unit is used for monitoring the supercooling degree of the heat exchanger group; the adjusting unit and the compressor are connected end to end to form a second loop, and the second loop is connected with the first loop in parallel; the adjusting unit is used for recovering the refrigerant from the first loop or releasing the refrigerant to the first loop according to the supercooling degree of the heat exchanger set. According to the air conditioning system, the refrigerant can be recycled or released according to the running condition, so that the refrigerant amount is always in the optimum range when the air