Kabushiki Kaisha Toshiba

Yoshiaki Nagaoka

Masao Isshiki

Masao Ozu

Eiji Kuwahara

Atsushi Nagasawa

Atsuyuki Hiruma

Kazuhiko Akiyama

Nobuo Kawai

Takao Hoshi

Kenzi Iizuka

Tohru Kubo

Susumu Nagakura

A refrigeration cycle has a compressor, an outdoor rotary-type heat exchanger, a motor-operated expansion valve, and an indoor rotary-type heat exchanger which are sequentially connected to each other to circulate a refrigerant. A tank is set in a connected state or a non-connected state with respect to a refrigerant discharge side of the compressor. A detector detects at least a pressure at one side of each of the exchangers. A first controller sets the tank in a non-connected state when a normal operation of an air conditioner is to be started, and controls the capacity of the compressor, the rotational speed of the exchangers, and the opening degree of the valve in accordance with an air-conditioning load, thereby performing the normal operation of the air conditioner. A second controller causes the compressor to keep operating at a predetermined capacity until a detection pressure from the detector coincides with a preset value, when the air conditioner is to be stopped, and sets the tank in a connected state while controlling the valve to a predetermined opening degree, thereby recovering a refrigerant in the tank. A third controller rotates the exchangers at a predetermined speed when the air conditioner is to be started, and sets the tank in a connected state while controlling the valve to a predetermined opening degree, thereby filling the refrigerant in the exchangers from the tank.

Air conditioner using rotary-type heat exchangers

A cooling fin, used in a heat-exchanger, which includes a breakable line section extending from one side of the cooling fin plate to a substantially middle portion of the plate in a direction perpendicular to the elongated direction of the plate and a substantially V-shaped notch formed at a portion of the other side of the plate corresponding to the extended end of the breakable line section. The cooling fins are stacked in prescribed numbers to make a cooling fin block. The breakable line section includes a perforated line and is broken when one part of the cooling fin block in the elongated direction is bent against the other part of the block along the breakable line section.

Bendable cooling fin and heat-exchanger with a bent cooling fin block

Growing community of inventors

Shizuoka, Japan

Yoshiaki Nagaoka