Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Seiji Hirakawa

Hidetomo Nakagawa

Takashi Kobayashi

Hiroshi Yoshikawa

Shingo Hamada

Hiroaki Makino

Hajime Ikeda

Yosuke Kikuchi

Koji Sachimoto

Takashi Ikeda

Toshiaki Yoshikawa

Takahide Tadokoro

Koji Yamaguchi

Shoji Yamada

Hiroaki Ishikawa

Tadashi Saito

Masayuki Oishi

Mitsuhiro Shirota

Tetsuo Yamashita

Hiroki Okazawa

Yasuhide Hayamaru

Nobuaki Uehara

Akira Takamori

Hiroyuki Nakagawa

Takuya Niimura

Akinori Sakabe

Naoya Tanaka

Jiro Nakasu

Motoshi Tezuka

Nobutaka Tanabe

Koichi Umetsu

Junichi Okazaki

In an axial flow fan according to the present invention, a plurality of blades rotate about a rotation axis of the blades to convey a fluid. In the axial flow fan, the plurality of blades each have a leading edge at a leading side in a rotational direction, a trailing edge at a trailing side in the rotational direction, and an outer peripheral edge connecting the leading edge and the trailing edge. The leading edge of one of the plurality of blades and the trailing edge of another blade adjacent to the leading edge of the blade in the rotational direction are connected by a plate-shaped connection portion. The plurality of blades each have at least one plate-shaped reinforcement rib extending from a periphery of the rotation axis toward the outer peripheral edge of the blade.

Axial flow fan and air-conditioning apparatus having axial flow fan

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

A stabilizer has a tip portion at a boundary between the stabilizer and a nozzle, and a projection on the lower side of the tip portion, and a first recess is formed between the projection and the tip portion in a continuously recessed shape in the longitudinal direction of the cross flow fan.

Indoor unit of an air-conditioning apparatus with grooved flow stabilizer

In an indoor unit for an air-conditioning apparatus, a casing has an air inlet formed in an upper part and an air outlet formed below a front part. The casing accommodates a heat exchanger and fan. A horizontal airflow-direction louver is mounted pivotally inside the air outlet to guide airflow in a horizontally changeable manner. A vertical airflow-direction louver is mounted to cover the air outlet in a closed position and to guide airflow in a vertically changeable manner. An infrared sensor projects downward from the casing at a position in a horizontal end portion of the casing and in front of the air outlet. An airflow blocking portion is located behind the infrared sensor, and has a side wall on or beside one edge of the air outlet. The side wall is located closer to a center of the air outlet in the horizontal direction than the infrared sensor.

Indoor unit for air-conditioning apparatus with airflow blocking portion for infrared sensor

Propeller fan

A cross flow fan achieves low power input and low noise level by preventing flow separation on an air inlet side and reducing a maximum air velocity in the gap between the blades. At least one of units constituting a cross flow fan is an appearance unit configured such that when the unit is sequentially cut in a direction from one of rings to the other ring along a plane whose normal coincides with a rotation axis, a region S and a region C appear, the radius of a second circle, serving as an inner circumferencial circle (having a radius), in the region S being a first radius of predetermined length, the radius of the second circle, serving as the inner circumferencial circle, in the region C being a second radius shorter than the first radius.

Cross flow fan, air-sending device, and air-conditioning apparatus

To provide an air conditioner capable of reducing an input power and a rotational speed of a fan motor necessary for obtaining a predetermined flow rate from an indoor unit. An air conditioner includes an indoor unithaving at least one inletand one outlet; a cross-flow fanconnected to a fan motor; a front heat exchanger; and a back heat exchanger, wherein an installation angle &#x3b1; of the front heat exchangerpositioned above the rotational center of the cross-flow fanrelative to the horizon is 65&#xb0;&#x2266;&#x3b1;&#x2266;90&#xb0;, a point of the back heat exchangerclosest to the front heat exchangeris located adjacent to the front heat exchangerfrom the rotational center of the cross-flow fan, and an outlet angle &#x3b2;of a blade of the cross-flow fanis 22&#xb0;&#x2266;&#x3b2;2&#x2266;28&#xb0;.

Air conditioner

In an air conditioner, reverse inhalation is prevented while broad band noise and wind sound are reduced. A projection arranged at the leading end of a stabilizer on the downstream side of an air stream flowing along a surface of the stabilizer opposing an impeller and protrudes toward the impeller to define the shortest distance to the impeller. A plurality of grooves or projections are provided on the opposing surface on the upstream side of the projection to disturb the air stream flowing along the opposing surface. The positions of the grooves or the projections are arranged apart in a rotational axis direction. A plurality of convex portions are provided to disturb an air stream flowing along a surface of a casing opposing the impellers. The positions of the convex portions are arranged apart in the rotational axis direction of the impeller.

Growing community of inventors

Tokyo, Japan

Seiji Hirakawa