High efficiency water heating system
US4445464A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1982 |
| Grant date | May 1, 1984 |
| Priority date | — |
| Expiry date | Jul 12, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24H1/403
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A high efficiency gas fired residential water heater includes an insulated, plastic-lined storage tank. The water in the tank is heated by an external heat exchanger which defines a water-walled combustion chamber. The fuel gas and combustion air burned in the chamber are premixed to a near stoichiometric mixture without the use of a blower. Under the force of line pressure or less, the fuel gas is accelerated into an aspirator/mixer which premixes an amount of air sufficient for complete combustion of the fuel gas. The water-walled combustion chamber is particularly suited for substantial recovery of the heat of a pilot flame. The pilot products of combustion heat water at the upper end of the combustion chamber without causing significant convective flow throughout the heat exchanger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.