Diagonal flow air jet fan

PURPOSE: A diagonal flow air jet fan is provided to reduce friction of the indoor air and minimize noises, while allowing the indoor air to flow a further distance. CONSTITUTION: A diagonal flow air jet fan(100) comprises a housing(110) including a connection housing(112) having a connector(112a) to be fixed at an end of a hanger(102), an inlet housing(114) having an inlet port and which is connected to an end of the connection housing, and an outlet housing(116) having an outlet port(116a) and which is connected to the other end of the connection housing; a fixed unit arranged within the connection housing, and which includes a motor and a plurality of blades having curved portions to be fixed at the inner surface of the connection housing, wherein the blades are inclined with respect to the air outlet direction in such a manner that rotation speed of the blades is reduced so as to increase a pressure; and a rotatable unit having an end connected to a driving shaft of the driving motor and the other end formed into a tapered shape, wherein the rotatable unit includes a plurality of rotating blades arranged along the outer surface of the rotatable unit. Each of rotating blades is inclined with respect to the air outlet direction, and has a wavy cross section so as to allow for ingress of indoor air.