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US 9,097,436 B1Granted
Integrated dual chamber burner with remote communicating flame strip
AssigneeLochinvar, LLC
InventorsJim C. Smelcer, Brian J. Iske, Neil W. Rolph, Mohamed M. Doura
Life of this patent
Estimating the term…
Abstract
A dual chamber burner assembly provides a header, a first burner chamber adjacent the header, and a second burner chamber on an opposite side of the first burner chamber from the header. The second burner chamber is provided with a flame sensor portion extending back through the first burner chamber toward the header so that first and second flame sensors may be utilized to detect flame in the first and second chambers, respectively.
Claims21
A burner assembly, comprising:
- a header including a first fuel and air inlet and a second fuel and air inlet;
- a first burner chamber adjacent the header, the first burner chamber including a first foraminous outer burner surface, the first fuel and air inlet being communicated with the first burner chamber;
- and
- a second burner chamber on an opposite side of the first burner chamber from the header, the second burner chamber including a second foraminous outer burner surface located on an opposite side of the first foraminous outer burner surface from the header, the second fuel and air inlet being communicated with the second burner chamber, the second burner chamber having a flame sensor portion extending into the first burner chamber back toward the header, the flame sensor portion including a flame indicating foraminous outer burner surface of the second burner chamber extending from the second foraminous outer burner surface back toward the header, so that a flame sensor located adjacent the flame sensor portion of the second burner chamber need not be exposed to flame from the first burner chamber.
1 more element
A burner assembly, comprising:
- a first foraminous outer wall portion being partially cylindrical in shape and having a circumferential gap;
- a second foraminous outer wall portion including a finger shaped outer foraminous wall portion extending into the circumferential gap;
- at least one interior wall separating first and second interior zones, the first and second interior zones being adjacent the first and second foraminous outer wall portions, respectively, the at least one interior wall including a duct communicating the second interior zone with the finger shaped outer foraminous wall portion of the second foraminous outer wall portion;
- a first fuel and air inlet passage communicated with the first interior zone;
- a second fuel and air inlet passage communicated with the second interior zone;
- and
- a header including a header wall spaced from the at least one interior wall;
- wherein the first interior zone is cylindrical in shape and has first and second ends closed by the header wall and the at least one interior wall, respectively;
- and
- wherein the second interior zone is cylindrical in shape and has a first end closed by the at least one interior wall and a second end covered by foraminous material comprising part of the second foraminous outer wall portion;
- and
- wherein the second foraminous outer wall portion is located on an opposite side of the first foraminous outer wall portion from the header.
9 more elements
A water heating apparatus, comprising:
- a multi-stage burner including:
- a header having first and second inlets;
- first and second internal zones separated by an internal barrier, the first and second internal zones being communicated with the first and second inlets, respectively;
- first and second external foraminous burner wall portions at least partially defining the first and second internal zones, respectively;
- a first blower communicated with the first internal zone of the burner for providing premixed fuel and air to the first internal zone to provide a first burner stage;
- a second blower communicated with the second internal zone of the burner for providing premixed fuel and air to the second internal zone to provide a second burner stage;
- a first flame sensor adjacent the first external foraminous burner wall portion;
- a second flame sensor adjacent the second foraminous burner wall portion;
- and
- an automated control system connected to the first and second blowers, the control system operable to provide air without fuel to the second internal zone when the second burner stage is not burning, so that air flowing through the second internal zone prevents flame from the first burner stage from being detected by the second flame sensor when the second burner stage is not burning.
7 more elements
Dependencies are inferred from the claim text.