BRIEF DESCRIPTION OF THE DRAWINGS
Other objects, features, and advantages of the present disclosure will become more apparent from the following detailed description made with reference to the accompanying drawings, in which like parts are designated by like reference numbers and in which:
FIG. 1 is a cross sectional view of a first embodiment of a blower;
FIG. 2 is a top view of the blower of FIG. 1;
FIG. 3A is a cross sectional view of the blower taken along line A-A of FIG. 2;
FIG. 3B is a cross sectional view of the blower taken along line B-B of FIG. 2;
FIG. 3C is a cross sectional view of the blower taken along line C-C of FIG. 2;
FIG. 3D is a cross sectional view of the blower taken along line D-D of FIG. 2;
FIG. 3E is a cross sectional view of the blower taken along line E-E of FIG. 2;
FIG. 4 is a graph showing a relationship of a motor-side scroll angle and a cross sectional area of the first embodiment and that of a comparative example 1;
FIG. 5 is a graph showing a relationship of a cross sectional area of an air passage at a motor-side scroll start portion and a specific noise level;
FIG. 6 is a graph showing a relationship of a cross sectional area of an air passage at a motor-side scroll finish portion and a specific noise level;
FIG. 7 is a graph showing a test result which has measured specific noise levels in the comparative example 1 and the comparative example 2;
FIG. 8 is a graph comparing a fluctuation of static pressure between blades in the first embodiment and that of the comparative example 1;
FIG. 9 is a graph showing a specific noise level for the first embodiment;
FIG. 10 is a top view of a second embodiment of the blower;
FIG. 11A is a cross section view of the blower taken along line F-F of FIG. 10;
FIG. 11B is a cross section view of the blower taken along line G-G of FIG. 10;
FIG. 11C is a cross section view of the blower taken along line H-H of FIG. 10;
FIG. 11D is a cross section view of the blower taken along line I-I of FIG. 10;
FIG. 11E is a cross section view of the blower taken along line J-J of FIG. 10;
FIG. 12 is a graph showing a relation between a maximum radius at a motor-side scroll start portion and a specific noise level;
FIG. 13 is a graph showing a specific noise level for the second embodiment;
FIG. 14A is a partial top view of a third embodiment of the blower;
FIG. 14B is a view seen from an arrow K in FIG. 14A;
FIG. 15 is a top view of the blower in a fourth embodiment;
FIG. 16A is a cross section view of the blower taken along line M-M of FIG. 15;
FIG. 16B is a cross section view of the blower taken along line N-N of FIG. 15;
FIG. 16C is a cross section view of the blower taken along the line Q-Q of FIG. 15;
FIG. 16D is a cross section view of the blower taken along line T-T of FIG. 15;
FIG. 16E is a cross section view of the blower taken along line U-U of FIG. 15;
FIG. 17 is a partial cross sectional view of a blower in a fifth embodiment;
FIG. 18 is a partial cross sectional view of a blower in a sixth embodiment;
FIG. 19 is a partial cross sectional view of a blower in a seventh embodiment;
FIG. 20 is a partial cross sectional view of a blower in an eighth embodiment; and
FIG. 21 is a partial cross sectional view of a blower in a ninth embodiment.
Patent Application
20070212218
