Burner for heating system

Abstract

A burner for a furnace includes an inner wall defining a central burner chamber. The inner wall includes a plurality of inner wall openings to admit a fuel flow into the central burner chamber. The burner further includes an outer wall which, defines an annulus for the fuel flow to the plurality of inner wall openings. An igniter is located in the central chamber. A furnace includes a heat exchanger and one or more burners disposed at and aligned with one or more burner openings of the heat exchanger. The one or more burners include an inner wall defining a central burner chamber. The inner wall includes a plurality of inner wall openings to admit a fuel flow into the central burner chamber. The one or more burners further include an outer wall defining an annulus for the fuel flow to the plurality of inner wall openings.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority to U.S. provisional application Ser. No. 61 / 521,143, filed Aug. 8, 2011, the entire contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]The subject matter disclosed herein relates to heating systems. More specifically, the subject disclosure relates to burners for residential and commercial heating systems.[0003]Heating systems, in particular furnaces include one or more burners for combusting a fuel such as natural gas. Hot flue gas from the combustion of the fuel proceeds from the burner and through a heat exchanger. The hot flue gas transfers thermal energy to the heat exchanger, from which the thermal energy is then dissipated by a flow of air driven across the heat exchanger by, for example, a blower.[0004]A typical construction is shown in FIG. 1. A burner 100 is located external to a heat exchanger 102. The burner 100, referred to as an inshot burner 100, receives ...

AI Technical Summary

Benefits of technology

The patent describes a burner for a furnace that includes an inner wall with multiple openings for fuel to enter the central chamber. There is also an outer wall that creates an annulus for the fuel flow. The burner has an igniter located inside the central chamber. The patent also mentions a furnace that includes a heat exchanger and burners that are aligned with the heat exchanger's openings. These burners have an inner wall with multiple openings and an outer wall that creates an annulus for the fuel flow. The furnace also has an igniter in the central chamber. These technical features improve the efficiency and control of the burner and furnace.

Problems solved by technology

The heat exchanger walls would necessarily be in close proximity to the burner and thus the concentration of heat produced in the immediate vicinity of the burner would result in excessively high temperatures in the wall of the heat exchanger 102.

Further, premix burners have a much quicker heat release than inshot burners and do not have the benefit of secondary airflow to protect the heat exchanger surfaces from damage.

Thus, simply replacing inshot burners with premix burners in an existing furnace construction would result in excessively high temperatures at adjacent heat exchanger surfaces.

Further, ignition access to a premix burner surface can be difficult and result in even more energy being dumped into the heat exchanger entry surfaces.

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