Compressor and refrigerating system

The invention discloses a compressor and a refrigerating system. The compressor comprises a compressor body. The compressor body comprises an air duct assembly. The air duct assembly comprises an inner layer air duct and an outer layer air duct and is arranged in a connecting pipe. One end of the inner layer air duct is connected with a compression cavity. The other end of the inner layer air duct is connected with the other end of an air suction pipe. The inner layer air duct is sleeved with the outer layer air duct, and a confined space is defined between the inner layer air duct and the outer layer air duct. The distance between the outer end of the outer layer air duct and the outer end of the connecting pipe is Ls. The distance between the outer end of the confined space and the outer end of the connecting pipe is Lk. Ls and Lk meet the requirements that Lk is larger than 10 mm and Ls-Lk is larger than 5 mm. according to the compressor, transmitting of heat on the compressor body to a refrigerant in the