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:
Dec. 06, 2005
Filed:
Mar. 30, 2001
Nobuo Domyo, Osaka, JP;
Nobuo Domyo, Osaka, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
A refrigerant circuit () is formed by connecting, in the order given, a compressor (), a four-way selector valve (), an outdoor heat exchanger (), an expansion valve (), and an indoor heat exchanger () by a gas side pipe () and a liquid side pipe (). The refrigerant circuit () is charged with a single refrigerant of R32 or with an R32/R125 mixed refrigerant whose R32 content is not less than 75% by weight. As a refrigeration oil, a synthetic oil is used, and such a refrigeration oil has an addition of an extreme pressure additive. When cooling rated capacity is not more than 5 kW, the liquid side pipe () is formed by use of a pipe whose inside diameter is less than 4.75 mm.