Kabushiki Kaisha Toshiba

Takaki Iwanaga

Koichi Goto

Yasuhiro Arai

Tetsuo Sano

Tetsuji Yamashita

Toru Yamaguchi

Kenji Umezu

Takao Hattori

Kazuhiro Moriyama

A refrigerating apparatus employs a mixture of coolants and a coolant controller for controlling a ratio between the coolants to adjust refrigerating capacity during a refrigerating operation. The apparatus has a compressor whose revolution speed is controlled to provide required refrigerating capacity. When the revolution speed of the compressor decreases below a lower set value or rises above an upper set value, the coolant controller controls the ratio between the coolants.

Refrigerating apparatus

An air conditioner employs a refrigerating cycle in which a non-azeotropic mixture of high and low boiling coolants is sealed. The ratio between the high and low boiling coolants of the coolant mixture changes according to a change in the opening of an electric expansion valve 7. A level sensor 19 is arranged in an accumulator 17 that accumulates the liquid phase of the coolant mixture. A value detected by the level sensor is used to calculate the ratio between the high and low boiling coolants actually circulating in the refrigerating cycle. According to the opening of the valve 7 or the ratio between the actual quantities of the high and low boiling coolants, basic operation parameters such as the operation frequency of a compressor 1 are changed. This results in stabilizing and optimizing the operation of the refrigerating cycle even if a cycle temperature or pressure is changed due to a change in the ratio between the high and low boiling coolants of the coolant mixture.

Air conditioner

An electric dust collector system which contains a plurality of charging mechanisms such as ionizer electrodes for charging dust particles and a plurality of collector mechanisms such as collector electrodes for collecting the dust particles. The collector electrodes are oxidized inwardly from the surface to form a metal oxide semiconductor layer. An ionizer-collector integrated electric dust collector system where the collector electrodes are extended and connected from the ionizer electrodes is disclosed. In a preferred embodiment, an electric dust collector system further contains electrostatic filters for collecting the dust particles and mesh-shaped electrodes for applying the electric field.

Electric dust collector system

An air conditioning apparatus to which an operating current is supplied through a plug includes a compressor and a detector for detecting one of the temperature level of the plug and the operating current level flowing through the plug. When the detected level of the plug is above a first upper limit during a predetermined time after the start of the compressor, the output level of the compressor is reduced for decreasing one of the temperature level of the plug and the operating current level flowing through the plug below the first upper limit. When the detected level of the plug is above a second upper limit below the first upper limit after the predetermined time, the output level of the compressor is reduced for decreasing one of the temperature level of the plug and the operating current level flowing through the plug below the second upper limit.

Growing community of inventors

Tokyo, Japan

Takaki Iwanaga