High efficiency radiant heater
AssigneeReznor LLC
InventorsGlyn Wilfred Turner, Lee Brian Herbert
Life of this patent
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Abstract
A radiant tube heater with a burner assembly, a radiant tube assembly and a combustion air pre-heater, wherein the burner assembly comprises: a burner fuel nozzle; a plenum chamber and a pre-mixer chamber; the plenum chamber having a combustion air inlet; wherein in use: combustion air flows from said plenum chamber through an orifice to said pre-mixer where said air is mixed with burner fuel entering said pre-mixer through said nozzle prior to being combusted at a burner head; said pre-mixer being at least partly located within said radiant tube assembly; and where in use at least part of the combustion air supplied to said plenum is preheated in said air pre-heater using residual sensible heat of the hot combustion gas products of the heater.
Claims16
A radiant tube heater comprising:
- a burner assembly including a combustion inlet, the burner to produce combustion air using pre-combustion air;
- a radiant tube assembly connected to the burner assembly, the radiant tube assembly to deliver combustion air to a radiant tube discharge;
- a combustion pre-heater comprising:
- a housing coupled to the radiant tube discharge and the combustion inlet;
- a pre-heater block located in the housing, the pre-heater block comprising:
- a first pre-combustion duct and a second pre-combustion duct parallel to the first pre-combustion duct;
- a member connected the first and second pre-combustion ducts to direct the pre-combustion air from the first pre-combustion duct to the second pre-combustion duct;
- and
- a plurality of combustion channels connected to the first pre-combustion duct and the second pre-combustion duct.
A radiant tube heater comprising:
- a burner assembly including to produce combustion air using pre-combustion air;
- a radiant tube assembly to deliver combustion air from the burner;
- a combustion pre-heater comprising:
- a housing coupled to the radiant tube assembly;
- a pre-heater block located in the housing, the pre-heater block comprising:
- a first pre-combustion duct and a second pre-combustion duct parallel to the first pre-combustion duct;
- and
- a plurality of combustion channels in thermal communication with the first pre-combustion duct and the second pre-combustion duct to cool the hot combustion air and to heat pre-combustion air in both the first and second-pre-combustion ducts in parallel.
Dependencies are inferred from the claim text.