Furnace apparatus
US5297729A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 1992 |
| Grant date | Mar 29, 1994 |
| Priority date | — |
| Expiry date | Aug 28, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24H9/0026
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An improved heating system is disclosed for providing heated air to a heated space, preferably using a gaseous fuel as the energy source. The system preferably includes an air heating sub-system, a compact combustion chamber, a separate cold air supply sub-system for conveying cold air from the heated space to the air heating sub-system, a combustion chamber heat exchanger in fluid communication with the cold air supply sub-system for transferring heat thereto, and a separate air circulating sub-system for withdrawing cold circulating air from the heated space. A mixing chamber is provided for mixing heated air from the air heating sub-system with the cold circulating air to provide heated air to the space. The system also preferably includes separate sub-systems for supplying pressurized combustion air and pressurized gaseous fuel to the air heating sub-system and for forcibly conveying exhaust gases therefrom without the need for a draft-type chimney or stack. In one preferred embodiment, a vortex-type air separator separates higher temperature and lower temperature combustion air, with the higher temperature air being used for combustion and the lower temperature air being heate…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.