Mitsubishi Heavy Industries Limited

Mitsubishi Jukogyo Kabushiki Kaisha

Tadahiro Matsukawa

Takayuki Takashige

Koji Toyama

Kenichi Aiba

There is provided an electric compressor capable of being actuated rapidly. During the time when the operation of an automotive air conditioner is stopping, by heating a motor, a refrigerant on the outlet sideof a compressor bodyis heated. Thereby, the temperature of refrigerant on the outlet sideis raised, and the refrigerant is prevented from being liquefied on the outlet sideof the compressor body, by which the automotive air conditioner can be actuated rapidly. Besides, by rotating the motorat the number of revolutions lower than that at the time of normal operation, the refrigerant liquefied on the outlet sideof the compressor bodymay be pushed out.

Electric compressor

A control computer, an error calculator, a Bezier curve divider and an output device are provided for generating a character curve. Coordinates of end points and control points of a Bezier curve are input to the control computer. The error calculator determines squares of distances of the input control points from a straight line connecting the end points as errors. If these errors exceed a tolerable range, the curve divider divides the curve into two parts, and new coordinates of new end points and control points of a divided Bezier curve are input to the error calculator. The curve division and error calculation are repeatedly carried out until the calculated errors fall within the tolerable range. The end points of the respective divided curves are connected by straight lines to develop the original curve.

Growing community of inventors

Nagoya, Japan

Tadahiro Matsukawa