| 摘要 |
Disclosed is a cross-flow fan where an inner diameter (d) and an outer diameter (D) of a fan blade meet the relationship expressed by 0.55≦̸d/D≦̸0.95. In cross-flow fan, (N) representing number of fan blades, a chord length (L) and outer diameter (D) of fan blades, and (M) representing number of blade wheels meet the relationships expressed by of 0.6≦̸L/(&pgr;D/N)≦̸2.8 and 0.15≦̸&pgr;D/(N×M)≦̸3.77. A plurality of blade wheels are stacked on each other in a manner that a displacement angle (&thetas;) is generated within the range of (1.2×360°/(N×M))≦̸&thetas;≦̸(360°/N) between adjacent blade wheels. The displacement angle (&thetas;) is set so that the overlapping number of fan blades having an equal installation angle is at most 5% of N×M representing a total number of fan blades. The present invention can provide a cross-flow fan that can succeed in noise reduction, a molding die used to produce the cross-flow fan, and a fluid feeder equipped with the cross-flow fan. |
