Blower apparatus and vacuum cleaner

• Main Authors: Kitamura, Jumpei, Hayamitsu, Ryosuke
• Format: Patent
• Language: English
• Published: 22.01.2019
• Subjects: BLASTING; COFFEE MILLS; DOMESTIC ARTICLES OR APPLIANCES; DOMESTIC WASHING OR CLEANING; FURNITURE; HEATING; HUMAN NECESSITIES; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; SPICE MILLS; SUCTION CLEANERS IN GENERAL; WEAPONS

A blower apparatus includes a motor portion having a central axis extending in a vertical direction; an impeller arranged above the motor portion, joined to a rotating portion of the motor portion, and arranged to rotate to send a gas from above radially outward; an impeller cover portion including an inner surface arranged to cover an outer circumference of the impeller and an upper side of an outer edge portion of the impeller, and further including an air inlet defined in a center thereof; and a body cover portion joined to the impeller cover portion, arranged to cover an outer circumferential surface of the motor portion, and arranged to define a tubular space between the motor portion and the body cover portion. The tubular space includes an upper region and a lower region arranged below the upper region. A radial distance between the outer circumferential surface of the motor portion and an inner circumferential surface of the body cover portion is arranged to continuously decrease with decreasing height in the upper region, and continuously increase with decreasing height in the lower region. The radial distance is arranged to be greater at an upper end of the upper region than at a lower end of the lower region.