Handheld blower
AssigneeChervon (HK) Limited
InventorsToshinari Yamaoka, Jianpeng Guo, Fangjie Nie, Xiandian Shao
Life of this patent
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Abstract
A handheld blower includes a housing, the housing including an air inlet and a duct assembly, the duct assembly including a duct, a motor and a fan mounted in the duct, a battery, a handle, and a blowpipe which defines a central axis. Along the direction of the central axis, the area of the flowing cross-section of an air passage at the rear end of the fan adjacent to the air inlet is larger than that of the flowing cross-section of an air outlet of the blowpipe, and the rate between the area of the flow cross-section of the air outlet of the blowpipe and the area of the flow cross-section of the flow-through area at the position of the fan is greater than or equal to 0.8.
Claims20
A handheld blower, comprising:
- a housing, the housing comprising an air inlet and a duct assembly, the duct assembly comprising a duct connected with the housing, a motor and a fan mounted in the duct;
- a battery mounted on the housing providing power to the motor;
- a handle comprising a gripping portion;
- and
- a blowpipe connected to the housing by the duct assembly wherein the blowpipe defines a central axis and along the direction of the central axis an area of a flowing cross-section of an air passage at a rear end of the fan adjacent to the air inlet is larger than that of a flowing cross-section of an air outlet of the blowpipe and wherein a flow-through area formed between an inner wall of the housing and a hub of the fan, and a rate between an area of a flow cross-section of the air outlet of the blowpipe and an area of a flow cross-section of the flow-through area at the position of the fan is greater than or equal to 0.8.
A handheld blower, comprising:
- a housing, the housing comprising an air inlet and a duct assembly, the duct assembly comprising a duct connected with the housing, a motor and a fan mounted in the duct;
- a blowpipe, connected to the housing by the duct assembly;
- and
- a battery mounted on the housing, wherein the battery of the handheld blower has a capacity larger than 170 wh.
A handheld blower, comprising:
- a housing, the housing comprising an air inlet and a duct assembly, the duct assembly comprising a duct connected with the housing, a motor and a fan mounted in the duct, and the fan being connected to the motor;
- a blowpipe, connected to the housing by the duct assembly;
- and
- a battery mounted on the housing, wherein the fan is an axial fan having an outer diameter in the range from 85 mm to 140 mm.
Dependencies are inferred from the claim text.