Sealing plug for connecting tube of internal-external machine of air conditioner and air conditioner

The utility model discloses a sealing plug for a connecting tube of an internal-external machine of an air conditioner and the air conditioner. The sealing plug comprises an elastic column body matched with a nut arranged on the connecting tube, and a positioning rib matched with a positioning groove formed in the inner wall of the nut is arranged on the elastic column body, or a positioning groove matched with a positioning rib arranged on the inner wall of the nut is formed in the elastic column body. The sealing plug is of an embedded press assembly structure, the elastic column body is aligned to the mouth portion of the nut, and the sealing plug can be installed into the nut through one-time pressing. Compared with a threaded-connection type sealing plug structure, the assembly time of each sealing plug can be saved by 1-2 seconds while the connecting reliability is ensured, and the assembling efficiency is improved.