SPIRAL FAN ASSEMBLY

摘要

PURPOSE: A spiral fan assembly is provided to reduce the size of a blowing fan system having the spiral fan by generating a great amount of wind with great wind pressure using the spiral fan assembly. CONSTITUTION: A spiral fan assembly includes a rotating shaft(11) coupled to a driving motor such that the rotating shaft(11) is rotated, a cylindrical hub(12) fixedly coupled to the rotating shaft(11), a plurality of blades(13) formed at an outer peripheral portion of the cylindrical hub(12) in a spiral pattern, and a fan housing surrounding a rotational route of the blades(13). The fan housing(14) has a hollow cylindrical structure. Two blades(13) are installed in the outer peripheral portion of the cylindrical hub(12) at an 180degs interval. A blade pitch of an intake part of the blade(13) is larger than a blade pitch of an exhaust part of the blade(13).