Heating apparatus
US7647897B2 · kind B2 · utility
49Cited by
10References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2005 |
| Grant date | Jan 19, 2010 |
| Priority date | — |
| Expiry date | Aug 28, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/00
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A heating apparatus 1 includes a shell 2, a primary heat exchanger (sensible heat exchanger) 3, a burner (combustion means) 5, and a fan 6. A secondary heat exchanger (latent heat exchanger) 7 has a plurality of heat receiving tubes 18 arranged in parallel between a pair of headers 16 and 17, the heat receiving tubes 18 being fixed to tube plates 20. The heat receiving tubes 18 are bare tubes without fins and are arranged across flow of combustion gas. The number of the tubes 18 arranged vertically is less than the number of the tubes 18 arranged horizontally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.