Matsushita Electric Industrial Co., Ltd.

Shozo Hase

Shuichi Yamamoto

Taisei Kohayakawa

Takashi Morimoto

Kiyoshi Sawai

Osamu Aiba

Masahiro Tsubokawa

Hideo Hirano

Toshiharu Yasu

Hiromasa Ashitani

Sadayuki Yamada

Hiroyuki Fukuhara

Taise Kohayakawa

It is an object of the present invention to improve the efficiency of a scroll gas compressor by operating a bypass at a proper compression ratio. To achieve the object, the present invention is constituted so that at least one pair of bypass holes whose one ends are opened in a compression chamber currently performing compression nearby a discharge vent and whose other ends communicate with a discharge chamber are asymmetrically arranged on a panel board. This structure makes it possible to improve the efficiency of the compressor by operating the bypass at an optimum compression ratio even if a difference is observed between pressure rises of a pair of symmetric compressed spaces under the compression process.

Scroll gas compressor having asymmetric bypass holes

Base wraps 21a and 31a of a fixed scroll 20 and orbiting scroll 30 both have spiral lengths that satisfy specified compression ratio in low speed drive region. Spiral shaped extension wraps 21b and 31b are provided for at least one of the base wraps 21a and 31a, extended from the spiral end position thereof, and a displacement is effected in the direction in which the thickness of the wraps 21 and 31 becomes thinner, at least at either the inner walls of the extension wraps 21b and 31b or at the outer walls of the wraps 21 and 31 in opposition thereto, making the interrelationship greater.

Scroll compressor

In a sealed-type scroll compressor having a stationary scroll member and an orbiting scroll member, the stationary scroll member is fixed after rotating it in an orbiting direction of the orbiting scroll member by a predetermined angle from a phase angle position where a possible orbiting radius between both scroll members is made maximum at the temperature before driving the scroll compressor.

Sealed-type scroll compressor and assembling method therefor

Sealed-type scroll compressor with relatively shifted scrolls based on

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Hikone, Japan

Shozo Hase