Sanyo Electric Co., Ltd.

Tokyo Sanyo Electric Co.

Yoshio Ishiai

Yoshinori Noboru

Toshihiko Mitsunaga

Masaya Tadano

Toshiyuki Ebara

Kazuyoshi Sugimoto

Takeo Komatsubara

Motohiko Kosano

Hirokazu Kawakami

Yutaka Hirano

Denji Mashimo

Hiroshi Takagi

Ituo Iwahashi

Masaaki Tanaami

There is disclosed a multi-stage compressing refrigeration device for multi-stage compressing a refrigerant using a plurality of compressing means. Its object is to enhance reliability, intend to reduce input and improve refrigeration effect, and to enhance efficiency. In the multi-stage compressing refrigeration device, low-stage compressing means and high-stage compressing means, a condenser, first expanding means, an intermediate evaporator, second expanding means and a main evaporator constitute a refrigeration cycle. The refrigerant flowing out of the condenser is branched into one refrigerant passed to the intermediate evaporator via the first expanding means and the other refrigerant passed to the main evaporator via the second expanding means. Heat exchange is performed between the refrigerant flowing into the second expanding means and the intermediate evaporator. Additionally, the refrigerant flowing out of the main evaporator is sucked by the low-stage compressing means, and the refrigerant flowing out of the intermediate evaporator is sucked by the high-stage compressing means together with the refrigerant discharged from the low-stage compressing means.

Multi-stage compressing refrigeration device and refrigerator using the device

Scroll compressor having limited axial movement between rotating scroll

Scroll compressor with a driving pin between scrolls and a sliding shaft

A scroll compressor having a fixed scroll member and an orbiting scroll member. The fixed scroll member has an end plate and a wrap attached to the end plate in an involute curve and, similarly, the orbiting scroll member has an end plate and a wrap attached to the end plate thereof in a juxtaposed relation with the fixed scroll member so that the wraps of the two scroll members are fitted closely together. A check valve is provided so that an exhaust opening of the end plate is always opened when the compressor is in its operation and closed only when the operation is stopped.

Scroll compressor with biased-open exhaust valve

A hermetically sealed motor compressor for use in a small-size refrigerating machine, refrigerator, freezer and the like has a compressor on which is mounted a silencer comprising in combination a suction muffler of thermal insulating and a discharge muffler made of formed metal plates. The suction muffler has an suction port disposed near the open end of a suction coupling fixed to a sealed casing, and also has an connection pipe connected to a compressor cylinder and having a distal end fitted directly in a hole defined in an head plate which is mounted on the head of the cylinder. A refrigerant gas as it is introduced from the suction coupling into the sealed casing can be drawn into the cylinder through the suction port, the suction muffler and the connection pipe to minimize heat transfer to the suction gas, so that the compressor can increase its volumetric efficiency.

Hermetically sealed motor compressor

Growing community of inventors

Ota, Japan

Yoshio Ishiai