Rich-lean burner
US9086010B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 2013 |
| Grant date | Jul 21, 2015 |
| Priority date | — |
| Expiry date | Dec 27, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23D2900/21003
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A rich-lean burner includes an inner cylinder to which lean gas, which is a mixture of gas and combustion air, is supplied, and an outer cylinder that is coaxially disposed around the inner cylinder such that rich gas, which is a mixture of gas and combustion air, is supplied between the inner cylinder and the outer cylinder. A burner head, which has small holes and whose diameter decreases toward the leading end, is provided on an opening of the inner cylinder. The burner head is obtained by forming a perforated metal, in which the small holes are arranged in a zigzag manner, into a conical shape. An interval between each of the small holes is two to three times the diameter of the small holes. The total area of the small holes is larger than the area of an upper end opening of an upper inner cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.