Heat exchanger
US4433645A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 20, 1981 |
| Grant date | Feb 28, 1984 |
| Priority date | — |
| Expiry date | May 20, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A heat exchanger includes elongated inner and outer tubular members defining an elongated generally annular passage therebetween. A burner mounted adjacent one end of the tubular members discharges hot gases into the inner tubular member for axial flow therealong and entry into the annular passage adjacent the ends of the tubular members remote from the burner. The gases then flow back through the annular passage for discharge through a lateral exhaust outlet in the outer tubular member adjacent the one end thereof. The annular passage has a varying cross-sectional shape along its length such that a major portion of the gases enter the annular passage at a location diagonally opposite from the exhaust outlet and then flow both longitudinally and circumferentially along the annular passage toward the exhaust outlet. The heat exchanger is particularly useful in heating diesel engine coolant to facilitate more rapid engine starting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.