Diversion type diagonal flow fan

A diversion type diagonal flow fan comprises a wind barrel, a motor, a wind wheel and blades. The diversion type diagonal flow fan is characterized by being provided with a diversion barrel which is composed of an outer barrel, an inner barrel and diversion blades, the outer barrel is of a tube shape, the inner diameter of the tube is equal to the inner diameter of the inner wall of the rear end face of the wind barrel, the front end face and rear end face of the outer barrel are respectively provided with a flange plate, the front flange plate of the outer barrel is in fixed butt joint with a flange plate of the wind barrel, the front section of the inner barrel is of a tube shape, the outer diameter of the tube is equal to the outer diameter of the rear end face of the wind wheel, three radial boards are evenly distributed on the inner wall of the front end portion of the inner barrel, a motor outer shell is sleeved inside the three radial boards in a combined mode and extends to form three bosses, three bo