Corner-unbreakable connecting piece for air pipe and air pipe comprising same

The utility model discloses a corner-unbroken connecting piece for an air duct and the air duct comprising the same, comprising a first connecting edge and a second connecting edge which are used for connecting air duct plates and are connected to form a break angle; the first connecting edge and the second connecting edge are respectively provided with a plurality of connecting ports for connecting air duct plates at intervals along the length direction; a broken opening facilitating bending of the connecting piece is formed in the first connecting edge in the width direction, and the broken opening extends from the outer edge of the first connecting edge to the direction of the second connecting edge. The connecting piece solves the technical problems that in the prior art, a connecting piece for connecting three adjacent air pipe plates is low in corner connecting strength, and the air pipe is poor in sealing performance, and the technical effects of enhancing the strength of the corner and improving the s