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. 04, 2018
Filed:
Mar. 04, 2013
Hitachi-johnson Controls Air Conditioning, Inc., Minato-ku, Tokyo, JP;
Hiroaki Tsuboe, Tokyo, JP;
Atsuhiko Yokozeki, Tokyo, JP;
Yoshiharu Tsukada, Tokyo, JP;
Susumu Nakayama, Tokyo, JP;
Hitachi-Johnson Controls Air Conditioning, Inc., Tokyo, JP;
Abstract
An object is to prevent performance deterioration by a refrigerant having a low global warming potential (GWP) and to decrease the diameter of a connection pipe. A refrigerating cycle device includes a compressor, a heat source-side heat exchanger, a first expansion device, a liquid-side connection pipe, a second expansion device, a user-side heat exchanger, and a gas-side connection pipesequentially connected. In addition, a refrigerating cycle uses a refrigerant of R32. The outer diameters of the liquid-side connection pipe and the gas-side connection pipe are set to '(D−1)/8 inch' (wherein 'D/8 inch' is the outer diameter of a connection pipe in the use of a refrigerant of R410A). The liquid-side connection pipe has a range of the Dgiven “2≤D≤4” and the gas-side connection pipe has a range of the Dgiven “3≤D≤8”.