IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0306199
(2002-11-27)
|
등록번호 |
US-7481650
(2009-01-27)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Midco International, Inc.
|
대리인 / 주소 |
Marshall, Gerstein & Borun LLP
|
인용정보 |
피인용 횟수 :
14 인용 특허 :
9 |
초록
▼
A direct gas-fired burner assembly is disclosed in which a two-stage flame is produced. A gas manifold is attached to two baffles with apertures disposed therein. The apertures are designed such that a fuel rich zone occurs near the manifold, while a lean zone occurs away from the manifold. At high
A direct gas-fired burner assembly is disclosed in which a two-stage flame is produced. A gas manifold is attached to two baffles with apertures disposed therein. The apertures are designed such that a fuel rich zone occurs near the manifold, while a lean zone occurs away from the manifold. At high fire, the apertures create a negative pressure zone which draws the gas away from the burner thereby allowing a primary flame to burn. The primary flame in the fuel rich zone ignites a secondary flame in the lean zone. Because a flame is burning throughout the entire combustion zone, the flame does not move out past the baffles, the flame remains smaller and cooler, and a lower output of pollutants is achieved.
대표청구항
▼
What is claimed is: 1. A gas-fired burner assembly, comprising: a burner manifold including a pair of shoulders defining a trough therebetween; a gas conduit disposed within the manifold and linked to the trough by a plurality of gas ports that transport gas from the conduit to the trough; at least
What is claimed is: 1. A gas-fired burner assembly, comprising: a burner manifold including a pair of shoulders defining a trough therebetween; a gas conduit disposed within the manifold and linked to the trough by a plurality of gas ports that transport gas from the conduit to the trough; at least one air port provided in each shoulder, each air port linking the trough to ambient air to transport air into the trough, each air port being located substantially between each of the plurality of gas ports so as to form an air buffer between each gas port; a pair of baffles, each baffle comprising a plurality of rows of apertures, fastened to the shoulders, and extending away from the trough in substantially a V-shape defining a combustion chamber therebetween; the plurality of rows divided into at least a primary group of rows; the primary group of rows comprising a first row of apertures and a second row of apertures disposed further from the trough than the first row of apertures; the first row of apertures including a plurality of aperture pairs, each pair being aligned directly above a corresponding air port, thereby forming an air buffer between the gas ports; and the second row of apertures including a plurality of aperture triads, each triad having a center aperture aligned directly above a corresponding air port and apertures to either side of the central aperture aligned with one of the apertures of one of the aperture pairs, thereby forming an air buffer between the gas ports and creating a negative pressure zone above the air ports. 2. The assembly of claim 1, the primary group of rows further including a third row of apertures, the third row including substantially equidistantly spaced apertures, each aperture being directly above an air port. 3. The assembly of claim 2, wherein the apertures of the second row and the third row form a plurality of triangular-shaped aperture groupings. 4. The assembly of claim 1, wherein a primary flame is maintained proximate the primary group of rows. 5. The assembly of claim 4, further including a secondary group of rows of apertures, the secondary group including a fourth row of apertures, a fifth row of apertures, a sixth row of apertures, a seventh row of apertures, an eighth row of apertures, and a ninth row of apertures, each row disposed further from the trough than the preceding row. 6. The assembly of claim 5, wherein the fourth row includes a plurality of substantially equidistantly spaced apertures, each aperture being either directly above an air port or directly above a gas port. 7. The assembly of claim 6, wherein the apertures of the fourth row are larger than the apertures of the first, second and third rows. 8. The assembly of claim 6, wherein the apertures of the fourth, seventh, and ninth rows are directly above a gas port. 9. The assembly of claim 6, wherein the diameters of the apertures of the seventh and ninth rows alternate between two sizes, and the diameters of the apertures of each of the remaining rows are generally consistent within each row. 10. The assembly of claim 5, the plurality of rows further including a tertiary group of rows of apertures, the tertiary group including a tenth row of apertures and an eleventh row of apertures, each row disposed further from the trough than the preceding row. 11. The assembly of claim 10, wherein the baffles include an outwardly directed end flange, each end flange being imperforate. 12. The assembly of claim 11, wherein all combustion is contained within the combustion chamber between the manifold and the end flanges. 13. The assembly of claim 11, wherein the baffles further comprise a front edge and a rear edge, and the apertures provided in the baffles nearest the front and rear edges provided in a laterally offset orientation from the manifold to the end flanges. 14. The assembly of claim 13, further including first and second end plates spanning between the first and second baffles, the first and second end plates and first and second baffles being manufactured from sheet metal. 15. The assembly of claim 1, wherein the baffles extend from the manifold a distance A, and the manifold has a length B, the ratio of B to A being at least 1:1. 16. The assembly of claim 15, wherein the burner assembly has a Btu output of at least 750,000 Btu per lineal foot. 17. The assembly of claim 16, wherein the burner assembly has NO2 and CO emission levels which satisfy ANSI Standards Z83.4 and Z83.18.
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