Matsushita Electric Industrial Co., Ltd.

Matsushita Seiko Co., Ltd.

Masao Wakai

Nobuyuki Yano

Takashi Inami

Mitsuru Ieki

Akira Aoki

Takuro Kotera

Toshio Utagawa

Tetsuo Ishizu

Kazufumi Watanabe

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.

Ventilator

A method of manufacturing a heat exchanger in which a laminate prepared by laminating many sheets one upon another so that the neighboring sheets may be formed with bonded portions and non-bonded portions, is expanded in such a direction that the respective sheets are spaced from each other so as to form flow channels or passages between the sheets at the non-bonded portions, and which employs the steps of printing patterns of bonded material onto the sheets, laminating the sheets, and subsequently expanding the laminate of the sheets to form the heat exchanger.

Method for manufacturing a heat exchanger

Heat exchanger apparatus

Growing community of inventors

Kasugai, Japan

Masao Wakai