Mitsubishi Denki Kabushiki Kaisha

Toshiaki Yamaguchi

Osamu Matsumoto

Kazuhiro Ueda

Fumio Matsuoka

Takeshi Sugimoto

Kouichi Negoro

Tetsuya Yamashita

Kouji Kajiyama

A condenser (2), an electronic expansion valve (5), an evaporator (6), and a motorized suction throttle valve (8) are connected in series with a compressor. When a capacity is increased, the electronic expansion valve (5) is controlled to be in a throttling direction and the motorized suction throttle valve (8) is controlled to be in an unthrottling direction in association with the control of the electronic expansion valve (5), and when a capacity is decreased, the electronic expansion valve (5) is controlled to be in an unthrottling direction and the motorized suction throttle valve (8) is controlled to be in a throttling direction in association with the control of the electronic expansion valve (5). While a capacity control of a compressor by a throttle control is been carried out, such associated control is made between the electronic expansion valve (5) and the motorized suction throttle valve (8), realizing a fine temperature control in a refrigerating machine without hunting.

Refrigeration cycle system

An electromagnetic proportional control valve of a construction having a sleeve; a spool slidably held within the sleeve; a spring holder to move with the spool; a ball mounted in the spring holder and lifted up thereby; and a valve seat inserted under pressure into the sleeve, the ball being brought into tight contact with the valve seat by the energizing force of the spring.

Electromagnetic proportional control valve

Growing community of inventors

Wakayama, Japan

Toshiaki Yamaguchi