The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 2002
Filed:
Jul. 05, 2001
Yasunori Kiyokawa, Osaka-fu, JP;
Yoshinori Noboru, Osaka-fu, JP;
Kazuyoshi Sugimoto, Osaka-fu, JP;
Takashi Sato, Osaka-fu, JP;
Jyunichi Suzuki, Osaka-fu, JP;
Kenji Aida, Osaka-fu, JP;
Sanyo Electric Co., Ltd., Osaka-fu, JP;
Abstract
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.