The part name and material / characteristic corresponding to the product serial number ﹣ serial number name and material / characteristic serial number name and material 1: the wind wheel is made of high temperature resistant material, with small deformation under high temperature condition, and the motor works stably 5. The motor assembly 1. The progressive die stamping process is adopted, with good motor coaxiality; 2. The armature part is made of high temperature enameled wire automatic assembly line, with good product consistency; the stability and temperature resistance are better ; 3. Use quiet bearing and lower motor running noise. 2. Use high temperature resistant material for module cover. The deformation is small under high temperature condition. The motor works stably. 6. Use high temperature resistant material for right volute cover. The deformation is small under high temperature condition. The motor works stably 3pwm.