Ventilator
AssigneeMatsushita Seiko Co., Ltd.
InventorsTetsuo Ishizu, Masao Wakai
Life of this patent
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Abstract
A ventilator has incorporated in a main body thereof an air blower having a ventilation casing provided with a fan intake opening facing an intake opening of the main body of the ventilator, the inner side of the main body being opened to form the intake opening thereof. A cylindrical soundproof unit including an inner ventilation passage having a larger ventilation area than a fan intake space and formed of a laminated plate which is formed of a plurality of air layers arranged in a direction intersecting the rotation axis of the air blower from the inner ventilation passage, is disposed in a space between the fan intake opening and the intake opening of the main body. The soundproof unit makes it possible to decrease noise generated by the air blower while the ventilation resistance is hardly increased.
Claims6
A ventilator, comprising:
- a main body which includes an intake opening;
- an air blower, incorporated in the main body, having a ventilation casing provided with a fan intake opening facing the intake opening of the main body;
- and
- a cylindrical soundproof unit including an inner ventilation passage having a ventilation area which is larger than a fan intake space defined by the fan intake opening and which comprises a laminated plate which defines a plurality of air layers arranged in a direction intersecting a rotation axis of the air blower from the inner ventilation passage, said cylindrical soundproof unit being disposed between the fan intake opening and the intake opening of the main body, the soundproof unit being disposed so as to define a space between an outer periphery of the soundproof unit and an inner surface of the main body, and the plurality of air layers defined by said laminated plate of said soundproof unit being in communication with the inner ventilation passage and with the space.
Dependencies are inferred from the claim text.