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:
Nov. 20, 2012
Filed:
Dec. 03, 2009
Satoshi Tomioka, Kawasaki, JP;
Hideya Tamura, Kawasaki, JP;
Tetsuya Ito, Kawasaki, JP;
Takahiro Matsunaga, Kawasaki, JP;
Takamitsu Kurokawa, Kawasaki, JP;
Shintaro Sanada, Kawasaki, JP;
Satoshi Tomioka, Kawasaki, JP;
Hideya Tamura, Kawasaki, JP;
Tetsuya Ito, Kawasaki, JP;
Takahiro Matsunaga, Kawasaki, JP;
Takamitsu Kurokawa, Kawasaki, JP;
Shintaro Sanada, Kawasaki, JP;
Fujitsu General Limited, Kawasaki-Shi, JP;
Abstract
A refrigeration apparatus includes an outdoor unit having a first compressor and a second compressor connected in parallel with each other, a first oil separator attached to the first compressor and connected to a suction pipe of the second compressor via a first oil return piping including a pressure reducing device, and a second oil separator attached to the second compressor and connected to a suction pipe of the first compressor via a second oil return piping including a pressure reducing device. The suction pipes of the first and second compressors are connected together. The first compressor is a variable-speed compressor, and the second compressor is a constant-speed compressor. A solenoid valve selectively forming a bypass circuit with respect to the pressure reducing device, is connected in parallel with the pressure reducing device of the first oil return piping. The solenoid valve is opened when the first compressor is restarted.