Brother Kogyo Kabushiki-kaisha

Rinnai Corporation

Yoichi Kojima

Hiroaki Sasaki

Kazuhiro Hayakawa

Shinya Otsubo

Takeshi Kawashima

Hidekatsu Naruse

Masaru Shimazaki

Provided are a heat exchanger that does not impede downsizing and removes water in the heat absorbing pipe adequately with a simple configuration even when the reduction in diameter of the heat absorbing pipe is made. A heat exchangerin which heat absorbing pipesare disposed in a multi-tier arrangement within a casingwhich is the passage of combustion exhaust gas, both pipe endsof each of the heat absorbing pipesare connected respectively to two headersprovided on a side plateof the casingand water introduced from an external pipeto each of the heat absorbing pipesthrough the headeris heat-exchanged and heated by combustion exhaust gas. The pipe endsof the heat absorbing pipesare arranged at a predetermined vertical interval. A drainage platefor forming a drainage passage through which the water that has reached the pipe end openingsA of respective heat absorbing pipesis removed during drainage operation for the heat absorbing pipesis disposed in the headerdisposed on a lower side of the heat absorbing pipesso as to face a number of the pipe end openingsA vertically arranged in a state of continuous.

Heat exchanger

Light deflector includes: polygon mirror made of plastic and having reflecting surfaces; motor rotatable on a rotation axis; and rotor rotatable by the motor, and including base portion intersecting the axis of rotation, and first protruding portion having circular cylindrical shape and protruding from the base portion in a rotation-axis direction. The polygon mirror has inner surface contacting outer peripheral surface of the first protruding portion, and bottom surface facing to the rotor in the rotation-axis direction. The bottom surface has contacting portion contacting the base portion, and the contacting portion overlaps a line segment connecting the rotation axis and any of vertexes of the polygon mirror viewed from the rotation-axis direction. The bottom surface has non-contacting portion spaced apart from the base portion, and the non-contacting portion overlaps a perpendicular dropped from the rotation axis to any of the reflecting surfaces viewed from the rotation-axis direction.

Light deflector and image forming apparatus

Growing community of inventors

Nagoya, Japan

Yoichi Kojima