To achieve excellent drying performance and silentness by using a fan with reduced noise while securing the sufficient quantity of wind even if an air channel for drying has many bends and a large channel resistance.
An impeller 330, as a deformed conventional sirocco fan, has two kinds of vane bodies: a first vane body 334 having only an outer peripheral blade part which is circular as seen from the top, and a second vane body 335 having an inner peripheral blade part of the same shape as of the first vane body 334 extending from the inner side edge of the outer blade part to the inner peripheral side. The vane bodies are annularly disposed so that the second vane bodies 335 are located every integral number of first vane bodies 334. The inner peripheral blade part of the second vane body 335 is nearly triangular with the side facing an inlet as the bottom side, and the distal end on the inner peripheral side is bent to fall in the direction of rotation. With this structure, air can be smoothly taken from the inlet to be fed to the outside, and as the air resistance is small, the noise can be reduced.
COPYRIGHT: (C)2007,JPO&INPIT
Shinhisashi Komoto
Yasushi Kawamura
Kimura Yoji
| JP8193598A | ||||
| JP63183332A | ||||
| JP2003290588A |