Thin-form centrifugal fan
View Patent ↗A small, lightweight and inexpensive thin-form centrifugal fan having a first moving blade; a second moving blade; and a stationary blade disposed between the first moving blade and the second moving blade and directing gas taken in by rotation of the first moving blade to the second moving blade. The first and second moving blades are formed such that the rigidity of their central portions is smaller than the rigidity of their outer perimeter areas.
1. A moving blade portion for use in a thin-form centrifugal fan comprising:
a base having a center portion and a peripheral portion; and
a plurality of partitions extending perpendicularly from the peripheral portion of the base;
wherein a thickness of the peripheral portion of the base is greater than a thickness of the center portion of the base along the entire length of the partitions.
2. The moving blade portion according to claim 1 , wherein the partitions are formed of a film-shaped metal foil.
3. The moving blade portion according to claim 1 , wherein the partitions are formed of a synthetic resin.
4. A thin-form centrifugal fan having a moving blade portion, the moving blade portion comprising:
a base having a center portion and a peripheral portion; and
a plurality of partitions extending perpendicularly from the peripheral portion of the base;
wherein a thickness of the peripheral portion of the base is greater than a thickness of the center portion of the base along the entire length of the partitions.
5. A thin-form centrifugal fan according to claim 4 wherein the partitions are formed of a film-shaped metal foil.
6. A thin-form centrifugal fan according to claim 4 wherein the partitions are formed of a synthetic resin.
7. A thin-form centrifugal fan comprising:
a first moving blade with a plurality of partitions;
a second moving blade with a plurality of partitions; and
a stationary blade disposed between the first moving blade and the second moving blade and directing gas taken in by rotation of the first moving blade to the second moving blade,
wherein the first and second moving blades are formed such that the rigidity of their central portions is smaller than the rigidity of their outer perimeter areas and the thickness of their outer perimeter areas is greater than a thickness of their center portions along the entire length of the partitions.
8. The thin-form centrifugal fan according to claim 7 , wherein the partitions are formed of a film-shaped metal foil.
9. The thin-form centrifugal fan according to claim 7 , wherein the partitions are formed of a synthetic resin.