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. 12, 2002
Filed:
Aug. 30, 2001
Applicant:
Inventors:
Nobuo Domyo, Osaka, JP;
Koichi Kita, Osaka, JP;
Assignee:
Daikin Industries, Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F25B 9/00 ;
U.S. Cl.
CPC ...
F25B 9/00 ;
Abstract
A compressor ( ), a four-way switching valve ( ), an outdoor heat exchanger ( ), an expansion valve ( ) and an indoor heat exchanger ( ) are sequentially connected together through gas piping ( ) and liquid piping ( ), thereby forming a refrigerant circuit ( ). The refrigerant circuit ( ) is filled with an R32 single refrigerant or an R32/R125 mixed refrigerant containing at least 75% by weight of R32. Synthetic oil is used as refrigerating machine oil. When the rated cooling capacity is 5 kW or less, the liquid piping ( ) is formed from piping having an inner diameter of less than 4.75 mm.