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:
Jul. 27, 2010
Filed:
Mar. 03, 2006
Masakazu Okamoto, Osaka, JP;
Katsumi Sakitani, Osaka, JP;
Michio Moriwaki, Osaka, JP;
Yume Inokuchi, Osaka, JP;
Masakazu Okamoto, Osaka, JP;
Katsumi Sakitani, Osaka, JP;
Michio Moriwaki, Osaka, JP;
Yume Inokuchi, Osaka, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
A first and a second expansion and compression machine () having different volume ratios (Vc/Ve) are connected in parallel to a refrigerant circuit () of a refrigeration apparatus. Expanders () of the expansion and compression machines () are connected in parallel. Compressors () of the expansion and compression machines () are also connected in parallel. Upon variation in the operating condition of the refrigeration apparatus, the ratio of rotation speed between the expansion and compression machines () is controlled by a controller (). This, as a result, allows the refrigeration apparatus to operate at a COP close to an ideal condition.