Burner

• US 20040224274A1
• Filed: 06/10/2004
• Published: 11/11/2004
• Est. Priority Date: 03/20/2002
• Status: Active Grant

• Current Assignee: Rinnai Corporation
• Original Assignee: Rinnai Corporation
• Inventors: Tomiura, Hideyuki, Akagi, Kazuyuki, Inomata, Masanobu
• Granted Patent: US 7,101,174 B2
• Time in Patent Office: Days
• US Class Current: 431/354
• CPC Class Codes: F23D 14/06 with radial outlets at the burner head
• CPC Class Codes: F23D 14/26 with provision for a retention flame pilot flame igniters F23Q9/00
• CPC Class Codes: F23D 14/586 formed by a set of sheets, strips, ribbons or the like
• CPC Class Codes: F23D 14/74 Preventing flame lift-off

Abstract

The present invention provides a burner capable of recovering more reliably a flame going out at one flame port via the transfer of flames from other flame ports when the burner is turned down. The burner according to the present invention is formed of two metal plates 10, 20 having substantially wave-shaped ends and superposed with the wave phases shifted. The burner comprises plural flame ports 12, 22 vertically alternately disposed along the ends of the metal plates 10, 20, and plural gas channels 14, 24 for supplying gas to the flame ports 12, 22. The burner further has a first deformed portion 16 where one metal plate 10 is deformed toward the other metal plate 20 at the flame port portions of one of the upper and lower flame ports 12, 22. In the first deformed portion 16, the vertical distance between the upper flame port center 12x and the adjacent lower flame port center 22x is shorter than the vertical distance between the centers of the correspondingly adjacent upper gas channel 14 and lower gas channel 24.

Claims

1. A burner comprising:

two metal plates, having substantially wave-shaped ends and superposed with the wave phases shifted, forming a plurality of flame ports vertically alternately disposed along the ends, and a plurality of gas channels for supplying gas to the flame ports; and

a first deformed portion where one of the metal plates is deformed toward the other metal plate at the flame port portion of one of the upper and lower flame ports, so that a vertical distance between an upper flame port center and an adjacent lower flame port center is shorter than a vertical distance between the correspondingly adjacent upper gas channel center and lower gas channel center.

2. The burner according to claim 1, further comprising a second deformed portion where one of the upper and lower metal plates coming into contact with each other at areas where the adjacent upper and lower flame ports are divided is deformed away from the other metal plate so that the upper and lower flame ports are communicated.

3. The burner according to claim 1, wherein the flame ports have opening areas of different sizes.

4. The burner according to claim 2, wherein the flame ports have opening areas of different sizes.

5. The burner according to claim 1, wherein the opening area of the lower flame ports is larger than the opening area of the upper flame ports, and the burner has a first deformed portion where the upper metal plate is deformed toward the lower metal plate at the upper flame port portion, so that the vertical distance between an upper flame port center and an adjacent lower flame port center is shorter than the vertical distance between the correspondingly adjacent upper gas channel center and lower gas channel center.

6. The burner according to claim 1, wherein both the upper and lower gas channels are slanted with the flame ports disposed upward.

7. The burner according to claim 2, wherein both the upper and lower gas channels are slanted with the flame ports disposed upward.

8. The burner according to claim 3, wherein both the upper and lower gas channels are slanted with the flame ports disposed upward.

9. The burner according to claim 4, wherein both the upper and lower gas channels are slanted with the flame ports disposed upward.

10. The burner according to claim 5, wherein both the upper and lower gas channels are slanted with the flame ports disposed upward.