The present invention provides an apparatus for diffusing a chemical substance comprising: a chamber having a diffusing member arranged to diffuse a chemical substance to air disposed within the chamber, wherein the chamber is in communication with an air-inlet arranged to receive air from an exterior of the chamber and an air-outlet arranged to expel air from within the chamber.

The present invention provides an apparatus for diffusing a chemical substance comprising: a chamber having a diffusing member arranged to diffuse a chemical substance to air disposed within the chamber, wherein the chamber is in communication with an air-inlet arranged to receive air from an exterior of the chamber and an air-outlet arranged to expel air from within the chamber.

A process for operating a heater that can be operated with hydrocarbon fuel, especially for a vehicle includes providing a substoichiometric air/fuel mixture in a precombustion chamber (18) for a combustion operation and performing a cold flame combustion in the precombustion chamber (18). The precombustion products forming in the precombustion chamber (18) during the cold flame combustion are supplied to a catalyst arrangement (32) and a partial catalytic oxidation is performed for producing a gas containing hydrogen and carbon monoxide. The gas produced during the partial catalytic oxidation is supplied to a main combustion chamber (34) for producing a hydrogen/carbon monoxide/air mixture. The hydrogen/carbon monoxide/air mixture is burned in the main combustion chamber (34).

A process for operating a heater that can be operated with hydrocarbon fuel, especially for a vehicle includes providing a substoichiometric air/fuel mixture in a precombustion chamber (18) for a combustion operation and performing a cold flame combustion in the precombustion chamber (18). The precombustion products forming in the precombustion chamber (18) during the cold flame combustion are supplied to a catalyst arrangement (32) and a partial catalytic oxidation is performed for producing a gas containing hydrogen and carbon monoxide. The gas produced during the partial catalytic oxidation is supplied to a main combustion chamber (34) for producing a hydrogen/carbon monoxide/air mixture. The hydrogen/carbon monoxide/air mixture is burned in the main combustion chamber (34).

This invention describes a new porous hydrogen burner that is intended to be installed on different types of furnaces requiring a precise monitoring of the thermal flux, and in particular furnaces for steam-reforming of natural gas or naphtha.

Disclosed is an evaporator arrangement (1) for evaporating liquid fuel for a mobile fuel-operated heating device, comprising: an evaporator unit (5) for distributing and evaporating liquid fuel; and at least one fuel supply line (6) for delivering liquid fuel to the evaporator unit (5). The evaporator unit (5) has at least one first section (B1) made of a metal wire mesh (8).

Disclosed is an evaporator arrangement (1) for evaporating liquid fuel for a mobile fuel-operated heating device, comprising: an evaporator unit (5) for distributing and evaporating liquid fuel; and at least one fuel supply line (6) for delivering liquid fuel to the evaporator unit (5). The evaporator unit (5) has at least one first section (B1) made of a metal wire mesh (8).

An evaporator burner for a mobile heating device is provided having a combustion chamber, an evaporator accommodation, and an evaporator element for evaporation of liquid fuel. The evaporator element is accommodated in the evaporator accommodation at the side facing the combustion chamber. At the side of the evaporator accommodation facing away from the combustion chamber, the evaporator burner comprises at least one combustion air guide element which is arranged such that a combustion air flow path extending at least along a portion of a base wall of the evaporator accommodation is formed between the combustion air guide element and the base wall of the evaporator accommodation.

An evaporator burner for a mobile heating device is provided having a combustion chamber, an evaporator accommodation, and an evaporator element for evaporation of liquid fuel. The evaporator element is accommodated in the evaporator accommodation at the side facing the combustion chamber. At the side of the evaporator accommodation facing away from the combustion chamber, the evaporator burner comprises at least one combustion air guide element which is arranged such that a combustion air flow path extending at least along a portion of a base wall of the evaporator accommodation is formed between the combustion air guide element and the base wall of the evaporator accommodation.

A mobile heating device operated with liquid fuel is provided, having: a combustion chamber (2) comprising a combustion air inlet (3), wherein the combustion chamber adjacent to the combustion air inlet (3) comprises a widening portion (20) the cross-section of which widens with increasing distance from the combustion air inlet (3) and in which in operation combustion air and fuel are converted in a flaming combustion; a fuel supply which is arranged such that fuel is supplied into the widening portion (20); and an air guide device (6) being adapted to feed combustion air into the widening portion (20) with a flow component directed in the circumferential direction such that an axial recirculation region (RB) forms in the widening portion (20) in which gases flow in the direction towards the combustion air inlet (3) oppositely to a main flow direction (H). The combustion chamber (2) is fluidically sectioned into a primary combustion zone (PZ) and a secondary combustion zone (SZ). The primary combustion zone (PZ) comprises the widening portion (20) and the recirculation region (RB). The secondary combustion zone (SZ) is provided with a secondary combustion air inlet (23) in such a manner that a higher air-fuel ratio λ than in the primary combustion zone (PZ) forms in the secondary combustion zone (SZ).