Throttling short pipe device capable of being replaced quickly and air conditioner

The throttling short pipe device comprises a short pipe main body and a throttling device, one end of the short pipe main body is detachably connected with a high-pressure stop valve, the other end ofthe short pipe main body is connected with one end of the throttling device, and the other end of the throttling device is detachably connected with an indoor unit and outdoor unit connecting pipe structure; and a throttling hole is formed in the throttling device. When the throttling short pipe device needs to be replaced in case of blockage, the refrigerant only needs to be collected into the air conditioner outdoor unit, the high-pressure stop valve is closed, the throttling short pipe device is detached through a wrench, and then the qualified throttling short pipe device is replaced. According to the air conditioner throttling device, the air conditioner outdoor unit does not need to be disassembled, welding is not needed, refrigerants do not need to be discharged, resource waste isavoided, maintenance of th