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US 2007/0177971 A1Published application
Impeller for blower and air conditioner having the same
AssigneeDaikin Industries, Ltd.
InventorsHironobu Teraoka, Hirohiko Matsushita, Tadashi Ohnishi, Hideshi Tanaka, Kouzou Yoshinaga
Life of this patent
Estimating the term…
Abstract
An impeller is provided for a blower having a blade (15), a plurality of notches (17) provided at predetermined intervals on a side edge of the blade (15), and a plurality of smooth portions (18) each provided between a pair of the notches (17). Since a transverse vortex discharged from the side edge of the blade (15), and on a large scale, is organized by vertical vortexes formed in the notches (17) on a small scale so as to be segmented into stable transverse vortexes, it becomes possible to reduce aerodynamic noise.
Claims22
An impeller for a blower characterized by:
- a blade (15);
- a plurality of notches (17) provided at predetermined intervals on a side edge of the blade (15);
- and a plurality of smooth portions (18), each being provided between a pair of the notches (17).
An impeller for a blower having:
- a circular support plate (14) having a rotational axis;
- and a plurality of blades (15) provided on a peripheral edge portion of the support plate (14), extending in parallel to the rotational axis and having a predetermined blade angle, the impeller being characterized by:
- a plurality of notches (17) provided on an outer edge (15a) of a pair of side edges of each of the blades (15), and arranged at predetermined intervals along a longitudinal direction of the respective blades (15);
- and
- a plurality of smooth portions (18), each being provided between a pair of the notches (17).
2 more elements
An impeller for a blower having:
- a circular support plate (14) having a rotational axis;
- and a plurality of blades (15) provided on a peripheral edge portion of the support plate (14), extending in parallel to the rotational axis and having a predetermined blade angle, the impeller being characterized by:
- a plurality of notches (17) provided on an inner edge (15b) of a pair of side edges of each of the blades (15), arranged at predetermined intervals along a longitudinal direction of the respective blades (15);
- and
- a plurality of smooth portions (18), each being provided between a pair of the notches (17).
2 more elements
An impeller for a blower having:
- a circular support plate (14) having a rotational axis;
- and a plurality of blades (15) provided on a peripheral edge portion of the support plate (14), extending in parallel to the rotational axis and having a predetermined blade angle, the impeller being characterized by:
- a plurality of notches (17) provided on both side edges (15a, 15b) of a pair of side edges of each of the blades (15), arranged at predetermined intervals along a longitudinal direction of the respective blades (15);
- and
- a plurality of smooth portions (18), each being provided between a pair of the notches (17).
2 more elements
An impeller for a blower having:
- a circular support plate (14) having a rotational axis;
- and a plurality of blades (15) provided on a peripheral edge portion of the support plate (14), extending in parallel to the rotational axis and having a predetermined blade angle, the impeller being characterized by:
- a plurality of notches (17) provided on an outer edge (15a) of a pair of side edges of a predetermined blade (15) selected from among the plurality of blades (15), arranged at predetermined intervals along a longitudinal direction of the predetermined blade (15);
- and
- a plurality of smooth portions (18), each being provided between a pair of the notches (17).
2 more elements
An impeller for a blower having:
- a circular support plate (14) having a rotational axis;
- and a plurality of blades (15) provided on a peripheral edge portion of the support plate (14), extending in parallel to the rotational axis and having a predetermined blade angle, the impeller being characterized by:
- a plurality of notches (17) provided on an inner edge (15b) of a pair of side edges of a predetermined blade (15) selected from among the plurality of blades (15), arranged at predetermined intervals along a longitudinal direction of the predetermined blade (15);
- and
- a plurality of smooth portions (18), each being provided between a pair of the notches (17).
2 more elements
An impeller for a blower having:
- a circular support plate (14) having a rotational axis;
- and a plurality of blades (15) provided on a peripheral edge portion of the support plate (14), extending in parallel to the rotational axis and having a predetermined blade angle, the impeller being characterized by:
- a plurality of notches (17) provided on both side edges (15a, 15b) of a pair of side edges of a predetermined blade (15) selected from among the plurality of blades (15), arranged at a predetermined interval along a longitudinal direction of the predetermined blade (15);
- and
- a plurality of smooth portions (18), each being provided between a pair of the notches (17).
2 more elements
Dependencies are inferred from the claim text.