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.

The present invention provides an infrared hydrogen/oxygen combustor. The structure of the combustor includes a sinus ring (1). A surrounding foot (12) of the angle-shaped sinus ring (1) wraps a material-containing basin (14). A first small tube (16) and a second small tube (7) are connected the material-containing basin (14) and the angle-shaped sinus ring (1). Water solution (3) is contained in the material-containing basin (14). A straight-hole ceramic water-absorbing board (5) is provided on the upper part of the water solution (3), a spacing ring (6) is provided above the side of the material-containing basin (14) and in the upward ring of the angle-shaped sinus ring (1), a two-stage material-containing box (9) with a separated brake is provide on one side of the angle-shaped sinus ring (1). The technical scheme of the invention reduces the production cost, the pollution and protects the environment.

The present invention provides a safer all-around radiation heating assembly than similar traditional heaters. As typical with traditional heaters, a shroud is used to surroundably cover a portable liquid propane tank. To replace the portable liquid propane tank, the shroud must be continuously raised to a predetermined height while a service person accesses the propane tank. There is a danger that if and when the shroud drops, a spark could be created resulting in igniting highly flammable escaped propane gas. The present invention overcomes dangers associated with the traditional heaters by eliminating the spark creation danger and by introducing a ventilation system to allow any leaked propane gas to escape away from the heater.

The present invention provides a safer all-around radiation heating assembly than similar traditional heaters. As typical with traditional heaters, a shroud is used to surroundably cover a portable liquid propane tank. To replace the portable liquid propane tank, the shroud must be continuously raised to a predetermined height while a service person accesses the propane tank. There is a danger that if and when the shroud drops, a spark could be created resulting in igniting highly flammable escaped propane gas. The present invention overcomes dangers associated with the traditional heaters by eliminating the spark creation danger and by introducing a ventilation system to allow any leaked propane gas to escape away from the heater.

This invention relates to a rotary flame heater, comprising a burner, a first wind wheel, a second wind wheel and a glass tube set in sequence from bottom to top; one side of the burner is set with an ignition device, the first wind wheel and second wind wheel are annular, a plurality of first air inlet passages are aslant set on a side wall of the first wind wheel, a plurality of second air inlet passages are aslant set a side wall of the second wind wheel, the inclined direction of the plurality of first air inlet passages is the same with that of the second air inlet passages. The advantage of this invention is to make full use of the combustion space, increase the contacting area with the glass tube and increase the calorific value when burns the same gas, which achieves a better heating effect.

A radiant panel burner is provided having a primary heat emitter and a secondary heat emitter. The radiant panel includes a plenum chamber that houses a baffle connected to a mixer that supplies combustible gas. In a preferred embodiment, the primary heat emitter is a perforated ceramic grid positioned over the plenum chamber and having a plurality of ports through which the combustible gas can travel. The secondary heat emitter is a non-planar radiant panel positioned over the primary heat emitter that generates convective and radiant heat. The non-planar shape of the secondary heat emitter provides more uniform heating and reduces accumulation of cooking by-products. The radiant panel protects the primary heat emitter from contaminants and provides enclosure for the combustion area for more rapid and efficient heating. Together, the primary and secondary heat emitters are configured to provide fast, clean, efficient, and uniform heating within a grilling apparatus.

A burner which is capable of producing zero NOx and zero CO by passing a thoroughly mixed stream of air and fuel at an appropriate air-to-fuel ratio to maintain a temperature below the NOx forming threshold through a radiant combustion zone. The radiant combustion zone provides the intense radiant energy required to initiate and to complete the combustion process. The burner comprises an Air-Fuel Ratio Attainment Means (AFRAM) and an Air-Fuel Mixing Means (AFMM) in fluid communication with the AFRAM to thoroughly mix the air and fuel to provide a readily combustible mixture, and one or more Radiant Combustion Zone (RCZ), and a Combustion Initiation Means (CIM) located in a combustion-initiation-contact position to initiate the combustion in the RCZ. A high velocity section or a porous flow permeable membrane is used as a combustion guard to prevent flameback from occurring. A second porous flow permeable membrane may be used as a flame trap for containing the infrared radiation within the radiant combustion zone. The burner can be used in commercial and domestic appliances and space heaters. At lower excess air the burner can be operated as an ultra low NOx burner.

The present invention relates to a radiant tube apparatus disposed in a heat treatment facility to perform a heat treatment of a strip and a method for manufacturing the same. The radiant tube apparatus includes a tube having an internal pipe, wherein the tube has a first continuous pattern and a second continuous pattern extending side by side and spaced apart from each other at a predetermined distance on a surface, and, in each of the first continuous pattern and the second continuous pattern, a plurality of unit patterns having a predetermined height from the surface are connected to each other in a longitudinal direction.

A thermophotovoltaic (TPV) system, comprises a substrate, an emitter material adhered to the substrate, and a thermophotovoltaic (TPV) cell. The emitter material is a typically a metal oxide doped nickel oxide sol-gel material, in which the metal is magnesium or zirconium, and in which the sol-gel material comprises 97-99 mol % metal oxide, and about 1-3 mol % nickel oxide dopant. Providing an emitter material as a sol-gel allows the material to be coated on to surfaces providing better adherence to the surface, and also provides excellent heat stability. A sol-gel material is also described.