Short-pipe throttling device and air conditioner vacuumizing and refrigerant charging method

The invention belongs to the technical field of air conditioner equipment and particularly relates to a short-pipe throttling device and an air conditioner vacuumizing and refrigerant charging method in order to solve the problem that low efficiency is caused due to the fact that an existing short-pipe throttling device conducts vacuumizing and refrigerant charging through a stop valve. The short-pipe throttling device comprises a pipe body. A main channel for refrigerant circulation is formed in the pipe body. The pipe body is provided with a first orifice and a second orifice communicating with a main pipeline. The short-pipe throttling device further comprises a bypass pipe connected with the first orifice and the second orifice. Through the technical scheme, in the vacuumizing or refrigerant charging process, air or refrigerant can be discharged out of or injected into an air conditioner outdoor unit through the main pipeline and can also be discharged out of or injected into the air conditioner outdoor u