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. 09, 2017
Filed:
Apr. 09, 2014
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Masaaki Nagai, Osaka, JP;
Masanobu Wada, Osaka, JP;
Abstract
A fin-and-tube heat exchanger comprises: fins () which each have flat sections (), first sloped sections (), and second sloped sections (); and heat transfer pipes (). If a flat plane which is in contact, from the side opposite the crest of a ridge (), with the upstream end and downstream end of the first sloped sections () in the air flow direction is a reference flat plane (H), the angle between the reference flat plane (H) and each of the second sloped sections () measured in a region upstream of a through-hole in the air flow direction is θ2, then the range of θ2 is determined by the relationship 0°<θ2<tan[(L±α)/{(S1−D1)/2−L/tan θ1}].