Mitsubishi Electric Corporation

Koichi Umetsu

Takashi Ikeda

Mitsuhiro Shirota

Koji Yamaguchi

Takahide Tadokoro

Masayuki Oishi

Seiji Hirakawa

Takahiro Shishido

Jiro Nakasu

A blade included in an impeller is formed so that, when viewed in a vertical cross-sectional view of the blade, a pressure surface of the blade and a suction surface of the blade opposite to the pressure surface are curved more in the direction in which the impeller rotates, in their areas farther from the axis of rotation of the impeller and closer to the exterior of the blade, and are arched so that a portion near the center of the blade is most distant from a straight line connecting the inner end and the outer end of the blade, the pressure surface and the suction surface form a curved surface including at least one circular arc, and a straight portion of the blade is formed to be connected to the curved surface on its one side, and extend toward the inner end of the blade on its other side.

Indoor unit for air-conditioning apparatus

In an air-conditioning device, back flow is less likely to occur at an outlet port in relation to an inlet resistance, and the air-conditioning device includes: a main body having an inlet port and an outlet port; a cross-flow fan provided inside the main body; and a heat exchanger provided inside the main body, wherein the main body includes at least a front surface, a rear surface, an upper surface and a lower surface, the inlet port is formed in the upper surface, a ratio H/Df between the main body height dimension H and the fan outer diameter Df is 2.2 to 2.7, and an angle of inclination &#x3b2; between a rear part of an front upward inclination section of the heat exchanger and a vertical direction is 30&#xb0; to 45&#xb0;.

Air-conditioning device

Growing community of inventors

Tokyo, Japan

Koichi Umetsu