Sanyo Electric Co., Ltd.

Yoshinori Noboru

Kazuyoshi Sugimoto

Yasunori Kiyokawa

Toshihiko Mitsunaga

Yoshio Ishiai

Hideki Wadayama

Katsuki Tsuchiya

Takashi Sato

Kenji Aida

Denji Mashimo

Jyunichi Suzuki

It is desired to avoid lack of lubricant oil in any of a plurality of compressors disposed in parallel in a single refrigerant circuit. To achieve this result, a freezer unit is provided, wherein a first kind of oil return pipe leading to a refrigerant suction pipe of a first compressor from an oil separator installed in a discharged refrigerant junction pipe is installed, and a second kind of oil return pipe leading to a refrigerant suction pipe of a second compressor from the regular oil level height of the first compressor is utilized.

Freezing apparatus

A high-performance scroll compressor permits the prevention of the deformation of an end plate of a fixed scroll in a hermetically sealed vessel of a typical wall thickness and strength, thus obviating the need for increasing the wall thickness of the vessel or employing a material of higher strength to enhance the pressure resistance of the vessel. A partition is provided between the rear surface of the fixed scroll and the hermetically sealed vessel, and a hole of the partition is communicated with a discharge hole in the end plate of the fixed scroll. A covering member is mounted on the partition to form a muffler, and a discharge pipe is attached to the muffler.

Scroll compressor having a discharge muffler

A high-performance compressor is capable of preventing inadequate oil feed even if the compressor tilts or foams and it is also capable of reducing the amount of oil discharged. The compressor has a compression element and an electric element housed in a hermetically sealed vessel, the interior of the hermetically sealed vessel being divided into an oil reservoir chamber and a hermetically sealed chamber. Two oil pumps are mounted on one end of a rotary shaft and oil is sucked into one of the oil pumps from the oil reservoir chamber and fed to the compression element mounted on the other end of the rotary shaft; oil is sucked into the other oil pump from the hermetically sealed chamber and fed to the oil reservoir chamber.

Compressor having a pump with two adjacent rocking rotors

A rotating type scroll compressor according to the present invention having a closed shell that houses an electric drive member and a scroll compressing member, the scroll compressing member having a drive scroll member having a drive scroll member and a follower scroll member, the drive scroll member having a spiral shape wrap formed on a end plate and being driven by the electric drive member, the follower scroll member having a center axial line that deviates from a center axial line of the drive scroll member and a spiral shape wrap fitting to the wrap of the drive scroll member, said rotating type scroll compressor comprising rotating shaft portions to which radial force of the rotating drive scroll member and the follower scroll member is applied, said rotating shaft portions being disposed at an upper portion and a lower portion of the wraps to which the radial load of fluid is applied.

Rotating scroll compressor having main and auxiliary rotating shaft

Rotating scroll compressor having a movable bearing member

Scroll compressor having limited axial movement between rotating scroll

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

A scroll compressor according to the present invention has a fixed scroll member and an orbiting scroll member, the latter being arranged in a juxtaposed relation with the former so that wraps thereof are fitted closely together, an electric motor having a driving shaft, and a swing link between the orbiting scroll member and the electric motor for transferring a rotational force generated by the electric motor to the orbiting scroll member. The swing link has an opening for receiving a boss of the orbiting scroll member and an eccentric opening to receive a driving pin of the driving shaft so that the orbiting scroll member orbits but does not rotate relative to the fixed scroll member. In the present invention, the swing link, which has a novel feature with respect to a positional relation established between the eccentric opening and the boss opening of the swing link, has a first member which is a main portion of the swing link and a second member which is a balance weight movably attached to the first member. The balance weight is limited in its movement in a radial direction of the rotary shaft.

Scroll compressor with balance weight movably attached to swing link

Growing community of inventors

Gunma-ken, Japan

Yoshinori Noboru