Pipeline assembly and air conditioner

The utility model discloses a pipeline assembly and an air conditioner, relates to the technical field of air conditioners, and aims to solve the technical problem of leakage caused by cracks easily formed after welding of a pipeline connecting position of an air conditioner compressor. The pipeline assembly comprises a first pipeline and a sleeve, the first pipeline comprises a first pipe section and a second pipe section which are connected with each other, the sleeve comprises a connecting section and a protecting section, the connecting section is arranged on the outer side of the first pipe section in a sleeving mode, and the protecting section is connected with the connecting section and extends to the outer side of the second pipe section. A protection groove is formed between the inner wall of the protection section and the outer wall of the second pipe section, and the width of the protection groove is larger than or equal to 0.1 mm. The air conditioner comprises an air conditioner indoor unit and an