Burner

• US 20040224273A1
• Filed: 06/10/2004
• Published: 11/11/2004
• Est. Priority Date: 03/22/2002
• Status: Active Grant

• Current Assignee: Rinnai Corporation
• Original Assignee: Rinnai Corporation
• Inventors: Inomata, Masanobu
• Granted Patent: US 7,094,050 B2
• Time in Patent Office: Days
• US Class Current: 431/354
• CPC Class Codes: F23D 14/065 with injector axis inclined to the burner head axis
• CPC Class Codes: F23D 14/60 Devices for simultaneous control of gas and combustion air
• CPC Class Codes: F23D 2900/00003 Fuel or fuel-air mixtures flow distribution devices upstream of the outlet

Abstract

A burner capable of reducing manufacturing costs by attaching upper and lower flow regulating plates to a metal plate rationally from the viewpoint of costs is provided. A burner 100 comprises a metal plate, having formed thereto a plurality of flame ports 102 disposed along the inner circumference of an opening 101 and alternately protruding in the upper and lower directions, and an annular mixture pipe 106 disposed outwardly of the opening 101. Substantially annular upper and lower flow regulating plates 200 and 300 are respectively disposed above and below the burner 100 with a clearance therebetween. The burner 100 has an integrally disposed flange portion 120 extending outwardly from the annular mixture pipe 106. The upper and lower flow regulating plates 200 and 300 have integrally disposed arms 220 and 320 that extend from outer circumferences of the upper and lower flow regulating plates 200 and 300 across the annular mixture pipe to a position corresponding to the flange portion and crimped to the flange portion.

Claims

1. A burner comprising:

a metal plate with a round opening, having formed thereto a plurality of flame ports arranged along an inner circumference of the opening and an annular mixture pipe disposed outwardly of the opening for supplying a mixture of gas and primary air to the flame ports; and

substantially annular upper and lower flow regulating plates respectively disposed above and below the metal plate with a clearance therebetween for regulating flow of secondary air;

a flange portion formed integrally thereto and projecting outwardly of the annular mixture pipe; and

arms formed integrally to the upper and lower flow regulating plates, extending from outer circumferences of the upper and lower flow regulating plates across the annular mixture pipe to a position corresponding to the flange portion and fixed mechanically to the flange portion.

2. The burner according to claim 1, wherein the arms of the upper and lower flow regulating plates are mechanically fixed to the flange portion at the same position.

3. The burner according to claim 2, further comprising a fixing means for mechanically fixing the arms of both the upper and lower flow regulating plates together to the flange portion.

4. The burner according to claim 1, wherein contact sections are disposed along a circumferential direction of the flow regulating plates for restricting tilt of the flow regulating plates by coming into contact with the burner when the arms of the upper and lower flow regulating plates are mechanically fixed to the flange portion.

5. The burner according to claim 1, wherein

the flange portion is provided with a slit;

the arm of the lower flow regulating plate is extended across the annular mixture pipe to reach the slit on the flange portion; and

the arm of the upper flow regulating plate comprises an upper plate portion extending in the outer radial direction from the substantially annular upper flow regulating plate, a side plate portion extending downward from both left and right ends of the upper plate portion, a lower plate portion extending transversely from the lower end of the side plate portion in contact with the flange portion, and a claw portion extending from the end of the lower plate portion through the slit and protruding below the flange portion, which is bent to embrace the arm of the lower flow regulating plate and to be crimped to the flange portion.

6. The burner according to claim 1, wherein

the flange portion is provided with a through hole;

the arm of the upper flow regulating plate comprises an upper plate portion extending in the outer radial direction from the substantially annular upper flow regulating plate, a side plate portion extending downward from both left and right ends of the upper plate portion, and a lower plate portion extending transversely from the lower end of the side plate portion in contact with the flange portion and having formed thereto a first screw hole corresponding to the through hole of the flange portion;

the arm of the lower flow regulating plate comprises a second screw hole corresponding to the through hole of the flange portion; and

the arm of the upper flow regulating plate, the flange portion and the lower flow regulating plate are screwed together via the first screw hole, the through hole and the second screw hole.

7. The burner according to claim 2, wherein contact sections are disposed along a circumferential direction of the flow regulating plates for restricting tilt of the flow regulating plates by coming into contact with the burner when the arms of the upper and lower flow regulating plates are mechanically fixed to the flange portion.

8. The burner according to claim 3, wherein contact sections are disposed along a circumferential direction of the flow regulating plates for restricting tilt of the flow regulating plates by coming into contact with the burner when the arms of the upper and lower flow regulating plates are mechanically fixed to the flange portion.

9. The burner according to claim 2, wherein

the flange portion is provided with a slit;

the arm of the lower flow regulating plate is extended across the annular mixture pipe to reach the slit on the flange portion; and

the arm of the upper flow regulating plate comprises an upper plate portion extending in the outer radial direction from the substantially annular upper flow regulating plate, a side plate portion extending downward from both left and right ends of the upper plate portion, a lower plate portion extending transversely from the lower end of the side plate portion in contact with the flange portion, and a claw portion extending from the end of the lower plate portion through the slit and protruding below the flange portion, which is bent to embrace the arm of the lower flow regulating plate and to be crimped to the flange portion.

10. The burner according to claim 3, wherein

the flange portion is provided with a slit;

the arm of the lower flow regulating plate is extended across the annular mixture pipe to reach the slit on the flange portion; and

the arm of the upper flow regulating plate comprises an upper plate portion extending in the outer radial direction from the substantially annular upper flow regulating plate, a side plate portion extending downward from both left and right ends of the upper plate portion, a lower plate portion extending transversely from the lower end of the side plate portion in contact with the flange portion, and a claw portion extending from the end of the lower plate portion through the slit and protruding below the flange portion, which is bent to embrace the arm of the lower flow regulating plate and to be crimped to the flange portion.

11. The burner according to claim 2, wherein

the flange portion is provided with a through hole;

the arm of the upper flow regulating plate comprises an upper plate portion extending in the outer radial direction from the substantially annular upper flow regulating plate, a side plate portion extending downward from both left and right ends of the upper plate portion, and a lower plate portion extending transversely from the lower end of the side plate portion in contact with the flange portion and having formed thereto a first screw hole corresponding to the through hole of the flange portion;

the arm of the lower flow regulating plate comprises a second screw hole corresponding to the through hole of the flange portion; and

the arm of the upper flow regulating plate, the flange portion and the lower flow regulating plate are screwed together via the first screw hole, the through hole and the second screw hole.

12. The burner according claim 3, wherein

the flange portion is provided with a through hole;

the arm of the upper flow regulating plate comprises an upper plate portion extending in the outer radial direction from the substantially annular upper flow regulating plate, a side plate portion extending downward from both left and right ends of the upper plate portion, and a lower plate portion extending transversely from the lower end of the side plate portion in contact with the flange portion and having formed thereto a first screw hole corresponding to the through hole of the flange portion;

the arm of the lower flow regulating plate comprises a second screw hole corresponding to the through hole of the flange portion; and

the arm of the upper flow regulating plate, the flange portion and the lower flow regulating plate are screwed together via the first screw hole, the through hole and the second screw hole.