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:
May. 30, 2017
Filed:
Mar. 15, 2013
Sangmu Lee, Tokyo, JP;
Sangmu Lee, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Chiyoda-Ku, Tokyo, JP;
Abstract
To increase a heat exchange capacity of an indoor heat exchanger without increasing a pressure loss inside tubes of an outdoor heat exchanger. A heat exchanger is constituted by an indoor machine equipped with an indoor heat exchangerconstituted by a plurality of heat transfer tubesA, which have a spiral groovesA formed with a predetermined lead angle Ra on inner faces of the tubes and are made to pierce a plurality of fins, and an outdoor machine equipped with an outdoor heat exchangerconstituted by a plurality of heat transfer tubesA which have a lead angle Rb of spiral groovesA smaller than that of a heat transfer tubesA used for the indoor heat exchangerand are made to pierce a plurality of fins