Fin-tube type heat exchanger
US5170842A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1989 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Jul 18, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S165/502
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A fin-tube type heat exchanger includes a large number of plate fins arranged in parallel to each other at predetermined intervals for allowing an air stream to flow between them, and heat exchanging tubes having an outer diameter Do and extending through the plate fins in a direction at right angles thereto. The heat exchanging tubes are set in rows spaced apart by a pitch L.sub.1 in a direction parallel to an air stream as represented by EQU 1.2 Do .ltoreq.L.sub.1 .ltoreq.1.8 Do, and are spaced in each of the rows by a pitch L.sub.2 in a direction perpendicular to the air stream as represented by EQU 2.6 Do .ltoreq.L.sub.2 .ltoreq.3.3 Do. Each of the plate fins is formed, between the heat exchanging tubes, with a plurality of cut and raised portions open to the air stream and protruding alternately is opposite directions from a base plate of the plate fin. The number of cut and raised portions increase from central portions between adjacent heat exchanging tubes in each row towards the leading and trailing edges of the plate fin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.