Sealed combustion gas-fired infrared heater

Abstract

A gas fired infrared heater is provided that includes a burner, a combustion chamber, a cooling air passage for supplying cooling air to the combustion chamber, a combustion air passage for supplying combustion air to the burner; and an outlet passage allowing combustion product gases to exit the combustion chamber. The cooling air passage is separate from the combustion air passage. The cooling air passage and the combustion air passage both draw from the same pressure zone into which combustion products exit.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a gas-fired infrared heating apparatus; particularly a heating apparatus that completely segregates an incoming combustion air flow from an incoming radiation-transmissive panel cooling air flow, both of which draw from the pressure zone to which combustion products exit, and that segregates both from the combustion chamber itself. BACKGROUND OF THE INVENTION [0002] A heating device having a fuel-fired radiant burner has long been used for heating various enclosures. The heating device here described includes a thin, radiation-transmissive panel that transmits infrared radiation into the space to be heated (e.g., room, tent) and also seals a combustion chamber which houses a radiant from the space being heated. To maintain the integrity of the heating device, the panel must be cooled. [0003] One way to cool the panel is to have a stream of cooling air flow (e.g., by convection) over the panel. An additional way to cool t...

AI Technical Summary

Problems solved by technology

However, one problem with this approach is that turbulence in the flame area creates enough admixture of combustion products with incoming combustion air to interfere with clean combustion (e.g., these units produced too much carbon monoxide from recirculation.)

Another problem with this approach is that back drafts can cause impaired combustion, carbon monoxide formation, or snuffing of the flame.

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