Warm up method for two stage furnace
US5326025A · kind A · utility
14Cited by
13References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1993 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Jul 8, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S236/09
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A two-stage furnace is operable at a high fire full rate mode and at a low fire partial rate mode when there is a call for high heat or low heat, respectively. In order for the furnace to be less prone to vent gas condensate formation when operating at low fire, and to permit the heat exchanger and vent pipe to reach equilibrium as soon as possible on both low fire and high fire, a shorter blower-on delay is provided for high fire and longer blower-on delay is provided on low fire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.