Impeller for fun, fun therewith and air conditioner with the fun

Application Number  00128850 Application Date  2000.09.22
Publication Number  1289897 Publication Date  2001.04.04
Priority Information   1999/9/24 JP 270830/99  
Applicant(s) Name  Matsushita Electric Ind. Co., Ltd.  
Inventor(s) Name  Izuyoshi Itsuki;Sugio Takashi  
Patent Agency Code  31100 Patent Agent  hou jiayou
AbstractIt is intended to lessen the effect of the blade end vortex of air generated on the negative pressure surface near the outer circumference of a rotating blade given to the influent air state on other blade rotating behind when it is separated from this blade and flows away. As a result, disturbance of influent air on each succeeding blade is reduced. The influent air coming into each blade is smooth. Unstable phenomena in the succeeding rotating blade such as air separation and decline of speed hardly take place. Accordingly, the blade noise is lowered and the static pressure is enhanced. An impeller has a hub and two blades disposed in the hub. Each blade has a shape with an aspect ratio (b/L) defined in a range of b/L<=1.