The air conditioning production line is mainly divided into two types: cabinet unit and hanging unit, and also includes commercial air conditioning and central air conditioning production lines. The cabinet machine and hanging machine production lines are generally full-automatic production lines, while the others are generally semi-automatic or manual production lines. The cabinet machine and hanging machine are divided into two production lines: indoor machine and outdoor machine, and usually the hanging line is also used for material distribution. The production line of indoor unit generally adopts tooling plate type, which is conveyed by multiple speed chain, chain plate line and roller line, including A, assembly end B, electrical performance testing end C and packaging section. The outdoor unit also adopts the tooling plate type, which is transported by roller line or chain plate line, including: A, front assembly line B, vacuum line C, first inspection D, rear assembly line E, commodity inspection line F. The main customers of the packaging line are: Midea, Gree, Hisense, TCL, AUX, Kelon, Changhong.