Refrigerant supplementary device and air conditioning system

The utility model discloses a refrigerant supplementary device and air conditioning system, wherein, the refrigerant supplementary device includes refrigerant storage jar, capillary, flow control valve, pressure sensor and control module, refrigerant storage jar, through the capillary communicates with the breathing pipe of compressor, pressure sensor installs on the breathing pipe of compressor, flow control valve set up in on the capillary, flow control valve is used for according to the flow control command control aperture, and the flow that makes the refrigerant supply is in to be predetermine in the flow range, control module with pressure sensor with the flow control valve electricity is connected for relatively reach the numerical value that lacks of refrigerant with the actual measurement pressure value of refrigerant and normal pressure value, and when the lacking numerical value and be less than the settlement threshold value of refrigerant to flow control valve sends the flow control instruction. The utility model discloses technical scheme can supply the refrigerant that leaks automatically to the precision that the refrigerant supplyed can be improved, the performance of product is improved.