US 12,448,985 B2
Air blower
Nobuaki Yabunouchi, Kyoto (JP); and Hayato Takahashi, Hyogo (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 18/710,534
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Oct. 28, 2022, PCT No. PCT/JP2022/040403
§ 371(c)(1), (2) Date May 15, 2024,
PCT Pub. No. WO2023/095549, PCT Pub. Date Jun. 1, 2023.
Claims priority of application No. 2021-192483 (JP), filed on Nov. 26, 2021.
Prior Publication US 2025/0035130 A1, Jan. 30, 2025
Int. Cl. F04D 29/54 (2006.01); F04D 25/08 (2006.01)
CPC F04D 29/541 (2013.01) [F04D 25/088 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An air blower comprising:
a body having a first inlet port for a gas at a first end of the body and an outlet port for the gas at a second end of the body and also having a flow channel connecting the first inlet port to the outlet port, the flow channel having a circular cross section;
a fan disposed inside the body and configured to generate an airflow as a stream of the gas;
a rectifier having a second inlet port for the gas and disposed between the fan and the outlet port in a direction pointing from the first inlet port toward the outlet port; and
an imparter configured to emit a functional component and impart the functional component to the airflow, wherein:
the rectifier is configured to divide the airflow into a first airflow and a second airflow,
a first region where the first airflow passes is located inside a second region where the second airflow passes when viewed in plan in the direction,
the first airflow has a flow velocity higher than a flow velocity of the second airflow at a predetermined position along the direction,
the imparter is configured to impart the functional component to the airflow within a range defined by projecting, in the direction, the first region at the predetermined position and extending from the second inlet port through the outlet port,
the rectifier comprises:
a first rectifier having the second inlet port and configured to change a flowing direction of the airflow; and
a second rectifier interposed, in the direction, between the first rectifier and the outlet port and configured to unify flowing directions of the airflow into the direction pointing from the first inlet port toward the outlet port, and
the first rectifier is configured to turn the airflow swirling downstream of the fan into the airflow directed toward a central axis of the fan, thereby forming, downstream of the first rectifier, a flow velocity distribution in which a velocity of the first airflow is higher than a velocity of the second airflow.