Sanyo Electric Co., Ltd.

Midori Futakawame

Kenzo Matsumoto

Akira Hashimoto

Hiroyuki Sawabe

Masazumi Sakaniwa

Kazuya Sato

Haruhisa Yamasaki

Masaji Yamanaka

Kentaro Yamaguchi

Shigeya Ishigaki

Akifumi Tomiuka

Hiromasa Aoki

A refrigerant systemD comprises a heat insulating housingprovided with an accommodating space inside and a refrigeration unitattached to a lower portion of the heat insulating housingin which a compressora gas cooleran internal heat exchangera restriction meansand an evaporatoraccommodated in a heat insulating caseA are disposed on a unit baseThe gas coolerand the heat insulating caseA are disposed so that air heat-exchanged by the gas coolermoves toward the heat insulating caseA, an air passage T is provided between the unit baseand the heat insulating caseA, the air heat-exchanged by the gas cooleris passed through the air passage T to be discharged outside, and the internal heat exchangeris disposed in such a manner that it is embedded in a heat insulating material layerC provided around the heat insulating caseA to be provided with a heat insulation property. Accordingly, exhaust heat-exchanged by the gas cooler is discharged outside without stagnation, and increases in an overload and operation power of the compressor are suppressed and the durability of the compressor can be improved. Further, the heat-exchanging efficiency of the internal heat exchanger can be improved and the generation of condensation on a surface of an outer side tube of the internal heat exchanger can be prevented.

Refrigerant system

A so-called internal intermediate pressure multistage compression type rotary compressor makes it possible to prevent the pressure inside a roller from inconveniently increasing and also to permit smooth and reliable supply of oil into a cylinder of a second rotary compressing element by a relatively simple construction. A lubrication groove for providing communication between an oil bore and a low-pressure chamber in the cylinder is formed in a surface of an intermediate partitioner that is adjacent to the cylinder of the second rotary compressing element. Furthermore, a through bore for providing communication between a hermetically sealed vessel and the inside of the roller is formed in the intermediate partitioner.

Rotary compressor

An object of the present invention is to provide a multi-cylinder rotary compressor which can enhance the reliability by improving the compression efficiency/mechanical efficiency. The bearings are fixed on the inner wall of the closed container, the cylinders are fixed to the bearings, and a gap is formed between the respective cylinders and the inner wall of the closed container. The design with the relatively large internal volume of the closed container is possible, and the reliability can be enhanced. Further, improvement in the compression efficiency and the mechanical efficiency can be achieved with the compact multi-cylinder rotary compression element.

Multi-cylinder rotary compressor

Growing community of inventors

Gunma, Japan

Midori Futakawame