The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 07, 2025
Filed:
Mar. 20, 2023
Daikin Industries, Ltd, Osaka, JP;
DAIKIN INDUSTRIES, LTD, Osaka, JP;
Abstract
A centrifugal blower includes an impeller, and a scroll casing. The impeller draws in gas through an opening in a side surface and sends out the gas in a centrifugal direction. The scroll casing includes an inlet, an outlet, a peripheral wall arranged along an impeller outer circumference, and a tongue that guides the gas flowing along the peripheral wall to the outlet. The peripheral wall includes a first planar portion extending continuously from the tongue, and a second planar portion located at a position advanced from the first planar portion in a rotation direction of the impeller. The peripheral wall is arranged so that a clearance is minimal at the second planar portion. The clearance is a difference between distances from a center of the impeller to an inner surface of the peripheral wall and to an outer surface of the impeller in a passage along the peripheral wall.