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US 2010/0248172 A1Published application
High-efficiency burner
OwnerJames R. Purcellinventor
Life of this patent
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Abstract
The invention relates generally to a fuel burner, and more particularly, but without limitation, to a high-efficiency gas burner with a gas pre-heat feature. Embodiments of the invention include a preheat tube that is coupled inline between a pressurized gas source and an orifice. The preheat tube may be formed into an elongated loop. An air/gas mixing tube extends inside the loop formed by the preheat tube from a proximal end near the orifice to a distal end away from the orifice. The distal end of the air/gas mixing tube is exposed to a portion of the preheat tube.
Claims16
A burner, comprising:
- an input port configured to receive pressurized gas;
- a preheat tube, a first end of the preheat tube coupled to the input port;
- an orifice coupled to a second end of the preheat tube;
- and
- a mixer tube, a first end of the mixer tube disposed near the orifice, a second end of the mixer tube disposed near a first portion of the preheat tube, the preheat tube being disposed outside the mixer tube, the burner being configured such that, in operation, a flame produced in part by preheated gas escaping from the orifice is contained by the mixer tube except that the flame extends beyond the second end of the mixer tube to heat the first portion of the preheat tube.
2 more elements
Dependencies are inferred from the claim text.