Sanyo Electric Co., Ltd.

Tsuyoshi Higuchi

Kenzo Matsumoto

Kazuaki Fujiwara

Manabu Takenaka

Dai Matsuura

Akira Hashimoto

Kazuhiko Arai

Keijiro Igarashi

Masaaki Takezawa

Aritomo Sato

An objective of the present invention is to provide a motor compressor that reduces noise by lessening a contact area between a stator and a shell, wherein a motor element is constituted of a stator having a stator core that contacts and is fixed to an internal wall of the closed vessel, and a rotator having a magnetic substance, which is attached to the rotating shaft and is rotatably supported in the inside of the stator construct. It is essential that H<Ho is satisfied wherein H is a dimension in a rotating shaft direction of an area in which the stator core contacts the closed vessel and Ho is a dimension in a rotating shaft direction of the stator core.

Motor compressor and cooling apparatus using the same

An object of the present invention is to attain the downsizing of a closed rotary compressor while realizing separation of oil from gas without any problem, and since an electric motor is constituted by a motor of a magnetic pole concentrated winding type which includes: a stator fixed to the inner wall of a closed container; a rotator rotatably supported by a rotating shaft on the inner side of said stator; a stator core constituting said stator; a plurality of cog portions and slot portions formed to said stator core; and a stator winding directly wound around each cog portion utilizing the slot portions, a protrusion dimension of the winding from the stator core is reduced, and the excellent oil separation effect can be obtained.

Closed rotary compressor

An object of the present invention is to provide a multi-cylinder rotary compressor which can eliminate a number of balancers for preventing vibrations. Assuming that the mass eccentricity in a cylinder is m1&times;r1; the mass eccentricity in another cylinder is m2&times;r2; the mass eccentricity of a balancer attached to the lower side of a rotator is m3&times;r3; the mass eccentricity of another balancer attached to the upper side of the rotator is m4&times;r4; respective distances from the cylinder to another cylinder, the lower balancer and another balancer are L2, L3 and L4, when the balancing is attained with the expressions m1&times;r1&plus;m4&times;r4&equals;m2&times;r2&plus;m3&times;r3, m4&times;r4&times;L4&equals;m2&times;r2&times;L2&plus;m3&times;r3&times;L3, and m1&times;r1&equals;m2&times;r2, the lower balancer is eliminated and the mass eccentricity of the balancer is set to be not less than 20% and not more than 80% of m4&times;r4.

Multi-cylinder rotary compressor

Growing community of inventors

Ota, Japan

Tsuyoshi Higuchi