Mitsubishi Denki Kabushiki Kaisha

Makoto Yoshihashi

Motoo Sano

Takashi Ikeda

Akira Takamori

Yoshinori Tanikawa

Motoshige Satou

Natsuko Nishigaki

Hiroshi Yoshikawa

Katsuyuki Aoki

Hidetomo Nakagawa

Yoshihiro Tanabe

Kunihiro Morishita

Katsuhisa Ootsuta

Sou Suzuki

Satoshi Chiguchi

Katsumi Ohashi

To obtain an air conditioning apparatus which provides a favorable atmosphere to the ear and saves energy even if the suction resistance of the impeller becomes high due to such as dust in the air conditioning apparatus. The air conditioning apparatus is provided with an impeller which is formed by a plurality of vanes and a ring for supporting the plurality of vanes, and includes a nozzle portion formed by a stabilizer and an air outlet, a cross flow fan formed by a guide wall, and a heat exchanger. The ratio H/&phgr;D of the outside diameter &phgr; D of the impeller to the height H of the air conditioning apparatus is 2.2 or above and 3.0 or below.

Air conditioner

A cross flow having a volute is disclosed which is less noisy during its operation. A volute-portion starting radius which is the length of a segment O-F.sub.1 at a volute-portion starting point F.sub.1 is R.sub.1 ; a maximum volute radius which is the length of a segment O-F.sub.2 at the outlet portion starting point F.sub.2 is R.sub.M ; a maximum volute angle which is an angle formed by the segment O-F.sub.2 and O-F.sub.1 is .varies.M; a point on the volute portion having a distance to the center O of the rotating shaft is R.sub.J =(R.sub.1 +R.sub.M)/2; an angle .varies..sub.J is formed by a segment connecting that point and the center 0 of the rotating shaft; the segment O-F.sub.1 is .varies..sub.M /2 (=F.sub.1 -O-F.sub.J); a volute portion of a scroll casing is formed into a circular arc such that R.sub.1 &lt;R.sub.J &lt;R.sub.M, and the circular arc passes through the points F.sub.1, F.sub.J, and F.sub.2.

Cross flow fan

The invention relates to a separation-type air conditioner capable of increasing the heat exchanging area of a compact indoor unit and of effecting high-performance heat exchange, and particularly employable as a high-performance yet compact indoor unit whose height is low. A front heat exchanger having a configuration in which an upper edge portion and a lower edge portion are respectively made to recede is disposed in an indoor unit. In addition, a rear heat exchanger separate from the front heat exchanger is disposed on the rear surface side of the front heat exchanger. Consequently, it is possible to increase the heat exchanging area in an indoor unit having the same height, and improve the heat exchanging capacity.

Separate-type air conditioner

An air conditioner includes bent portions provided at edge portions of a plurality of fins juxtaposed on a heat exchanger, respectively. Each bent portion is located at an edge portion which is near a cross flow fan and on the sides of said fin facing the cross flow fan and lying generally between the cross flow fan and a coolant pipe of the heat exchanger. The bent portions are formed by bending the edge portions so as to be in parallel to the coolant pipe and staggered along an axis parallel to the coolant pipe. Thereby, the noise during the operation of the cross flow of the air conditioner can be reduced.

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Shizuoka, Japan

Makoto Yoshihashi