Fan and air-conditioning apparatus provided with fan

Abstract

To provide an air-conditioning apparatus that is provided with an air-sending device that includes: a housing; a fan that is disposed in the housing; a casing that guides an airflow, the casing arranged adjacent to the back side of the fan; and a stabilizer that stabilizes the circular vortex, the stabilizer arranged adjacent to the front side of the fan. When δ=A/D expressed by an air flow inlet port width A and a fan diameter D is 2 or lower, an outer peripheral blade inflow angle β=δ×γ radian is in the range of 0.4≧γ≧0.3. The air-conditioning apparatus provided with an air-sending device is capable of suppressing noise as well as increasing fan performance even when the inlet port is narrow.

1 - 4 . (canceled) 
     
     
         5 . A fan comprising:
 a housing including an inlet port and an outlet port;   a cross flow fan disposed in the housing;   a casing arranged on a back side of the cross flow fan, the casing constituting a part of the outlet port; and   a stabilizer arranged on a front side of the cross flow fan, the stabilizer opposing the casing and constituting a part of the outlet port, wherein   where A is a maximum inlet width of the inlet port in a direction substantially orthogonal to a rotation axis of the cross flow fan, D is a diameter of the cross flow fan, and β is an outer peripheral blade inflow angle,
   β=( A/D )γ(radian),
 
   in which A/D≦2 and 0.4≧γ≧0.3 is defined.   
     
     
         6 . An air-conditioning apparatus provided with the fan of  claim 5 . 
     
     
         7 . A fan comprising:
 a housing including an inlet port and an outlet port;   a cross flow fan disposed in the housing;   a casing arranged on a back side of the cross flow fan, the casing constituting a part of the outlet port; and   a stabilizer arranged on a front side of the cross flow fan, the stabilizer opposing the casing and constituting a part of the outlet port, wherein   an enlarged area ratio is defined as
     1 . 416 ≧τ≧ 1 . 466 ,
 
   where the enlarged area ratio is a ratio of dividing an enlarged air flow path area, which is an area surrounded by a curved line made by the enlarged air flow path of the casing; a line segment connecting a rotation center of the cross flow fan to a starting portion of the enlarged air flow path, the line segment having a length of r 0 ; and a straight line that is, with respect to the rotation center of the cross flow fan, 90 degrees from the line segment, by a sector area of 90 degrees that has a radius of r 0 .   
     
     
         8 . The fan of  claim 7 , comprising:
 the housing including the inlet port and the outlet port;   the cross flow fan disposed in the housing;   the casing arranged on the back side of the cross flow fan, the casing constituting a part of the outlet port; and   the stabilizer arranged on the front side of the cross flow fan, the stabilizer opposing the casing and constituting a part of the outlet port, wherein   where A is a maximum inlet width of the inlet port in a direction substantially orthogonal to a rotation axis of the cross flow fan, D is a diameter of the cross flow fan, and β is an outer peripheral blade inflow angle,
   β=( A/D )×γ(radian),
 
   in which A/D≦2 and 0.4≧γ≧0.3 is defined.   
     
     
         9 . An air-conditioning apparatus provided with the fan of  claim 7 .