Air blowing device
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsSeiji Shirahama, Munetada Satou, Masayuki Takada, Kazuhiro Muromachi
Life of this patent
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Abstract
An air blowing device includes a housing with a suction port and a blow-off port, and a fan placed in the housing. The fan includes a fan case with a tongue section, an impeller, and a motor. The fan case includes an inlet and an outlet, and is shaped such that a space between the impeller and an inner wall of the fan case increases along a rotary direction of the impeller up to a cross section cut along a line between the tongue section and its opposite section. An opening area of the fan case at the tongue section is kept equal or decreases up to the outlet.
Claims14
An air blowing device comprising:
- a housing including a suction port for sucking air in a room and a blow-off port for discharging the air outside the room;
- a fan disposed in the housing;
- and
- a connecting duct externally connecting to the blow-off port,
- wherein the fan includes a fan case having a tongue section, an impeller disposed in the fan case, and a motor for driving the impeller,
- the fan case includes an inlet communicating with the suction port and an outlet communicating with the blow-off port,
- the fan case is shaped such that a space between the impeller and an inner face of the fan case increases along a rotary direction of the impeller up to a cross section cut along a line between the tongue section and an opposite section to the tongue section, and an opening area of the fan case is maintained equal from the tongue section through the outlet,
- when viewed from a bottom face of the housing, the fan case has a linear section, the linear section being formed continuously and bending at the opposite section as a vertex,
- a portion of the linear section between the outlet and the vertex is parallel to a portion of the fan case between the outlet and the tongue section, and
- when the housing is connected to the connecting duct, the linear section becomes closer to a centerline of the duct as the linear section closes to the outlet of the fan case, the linear section also becomes closer to the centerline as the linear section extends farther from the outlet of the fan case, and a blow-off port side of the connecting duct has a greater opening area than an opening of the blow-off port.
Dependencies are inferred from the claim text.