公开(公告)号：US12215716B2

公开(公告)日：2025-02-04

申请号：US18618349

申请日：2024-03-27

Applicant: Milwaukee Electric Tool Corporation

Inventor： Adam Czerwonka ,  Adam Ostrowski

IPC: F04D29/66 ,  F04D19/00 ,  F04D19/02 ,  F04D29/38

Abstract: Blowers, e.g., for use in outdoor applications, are provided. A blower includes an air inlet; an air outlet; and a fan assembly disposed between the air inlet and the air outlet. The fan assembly has a three-stage fan. The three-stage fan includes three axial fans mounted on a drive shaft and three stator fans arranged in series with the axial fans, wherein each axial fan comprises a plurality of blades each having a blade tip. The three-stage fan has a dimensionless flow coefficient Φ in a range from about 0.3 to 0.5 as calculated by the equation Φ=(q/(A))/ωR where q represents flow (m3/s), A represents cross sectional area at the fan (m2), ω represents speed (rad/s) and R represents fan tip radius (m) measured at a blade tip.

公开(公告)号：US20240328434A1

公开(公告)日：2024-10-03

申请号：US18618349

申请日：2024-03-27

Applicant: Milwaukee Electric Tool Corporation

Inventor： Adam Czerwonka ,  Adam Ostrowski

IPC: F04D29/66 ,  F04D19/00 ,  F04D29/38

CPC classification number: F04D29/667 ,  F04D19/002 ,  F04D29/384 ,  F05D2240/307

Abstract: Blowers, e.g., for use in outdoor applications, are provided. A blower includes an air inlet; an air outlet; and a fan assembly disposed between the air inlet and the air outlet. The fan assembly has a three-stage fan. The three-stage fan includes three axial fans mounted on a drive shaft and three stator fans arranged in series with the axial fans, wherein each axial fan comprises a plurality of blades each having a blade tip. The three-stage fan has a dimensionless flow coefficient Φ in a range from about 0.3 to 0.5 as calculated by the equation Φ=(q/(A))/ωR where q represents flow (m3/s), A represents cross sectional area at the fan (m2), ω represents speed (rad/s) and R represents fan tip radius (m) measured at a blade tip.