| 摘要 |
A gas burner head with extra simmer capabilities, a burner base assembly and combinations thereof are disclosed. A gas burner head having one or a multiple fuel/air mixture exit ports with a simmer flange located above the ports and extending beyond the port exit by a predetermined distance allows the flame/fuel-air mixture from a given port to be fully or partially covered from above at a desired flame height or fuel-air mixture setting. The burner head can be a single or multiple piece assembly and can be used as part of a complete system or as an added-on component to an existing burner system. A burner base assembly has a burner base plate, a venturi and an orifice enclosure that creates a means to supply the required gas for combustion and also enables the burner head to be fully sealed. The venturi can be built-in as part of the burner base plate or made as a separate component and assembled through the burner base plate to create a sealed path. The orifice enclosure houses the gas injector orifice and can be installed in a separate compartment partitioned from the burner base plate by a sheet of metal (or partition plate) or in an enclosed area or plenum. Both the burner base plate/venturi combination and the orifice enclose may be securely attached to each other to maintain a predetermined distance between the gas orifice and the venturi inlet to allow a predetermined amount of primary air and gas mixture to be injected through the venturi into the burner head to create proper combustion. The burner base plate may be installed in a slightly raised position relative to the partition plate and/or orifice enclosure to create an air gap and the path through which primary air flows. A secondary source of primary air may be supplied through openings located around the orifice enclosure. The burner base assembly can be a single or multiple piece assembly and can be used as part of a complete system or as an added-on component to an existing burner system. Because of the rules governing abstracts, this abstract should not be used to construe the claims.
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