A vehicle heater includes a heater housing (12), through which heating air to be heated can flow, with a heating air inlet area and with a heating air outlet area. A burner unit is arranged in the heater housing. A combustion air blower (46) is arranged in the heater housing for delivering combustion air to the burner unit. A heat exchanger unit is arranged in the heater housing (12). Heating air flowing through the heater housing (12) can flow around the heat exchanger unit. A combustion air intake muffler (76) is arranged essentially in the heater housing (12). A muffler housing (78) made in one piece with the heater housing (12) is associated with the combustion air blower (46).

A vehicle heater includes a heater housing (12), through which heating air to be heated can flow, with a heating air inlet area and with a heating air outlet area. A burner unit is arranged in the heater housing. A combustion air blower is arranged in the heater housing for feeding combustion air to the burner unit. A heat exchanger unit is arranged in the heater housing (12). Heating air flowing through the heater housing (12) can flow around the heat exchanger unit. A combustion air intake muffler (76), which is essentially arranged in the heater housing (12), is associated with the combustion air blower (46).

A flow-directing insert for a heating device having an evaporator burner, wherein: the evaporator burner has a fan chamber or combustion air pre-chamber, an evaporator holder and a combustion chamber, the evaporator holder has a base wall and a circumferential wall with at least two combustion air passage openings to direct combustion air from the fan chamber or combustion air pre-chamber initially along an exterior of the evaporator holder through the combustion air passage openings into the combustion chamber, the flow-directing insert comprises at least a first region for positioning over at least one of the combustion air passage openings and a second region for fixing in the fan chamber or combustion air pre-chamber of the evaporator burner, the first region being in the shape of a tongue.

A hot air feed wheel, for a vehicle heater, includes a hub (44) to fix the hot air feed wheel (22) to a drive shaft and a feed area (50), adjacent to the hub (44), in a transition area (48). A plurality of feed blades (36) are arranged following one another about a feed wheel longitudinal axis (L) in the circumferential direction. The transition area (48) includes a plurality of connection webs (66) following one another about the feed wheel longitudinal axis (L) in the circumferential direction.

The invention relates to a heating device, in particular for mobile use, comprising a combustion chamber for reacting fuel with combustion air in order to release heat, a heat exchanger for transferring at least part of the released heat to a heating medium to be heated, a fuel conveying device for supplying fuel to the combustion chamber, a combustion air fan for supplying combustion air to the combustion chamber, a heating medium fan for supplying the heating medium to the heat exchanger, a common drive for the combustion air fan and the heating medium fan, at least one sensor for monitoring the mass flow of the heating medium, and a controller, which controls the fuel conveying device and the common drive. The controller is designed to change the ratio of the amount of the heating medium and the amount of the fuel supplied to the combustion chamber according to the mass flow of the heating medium.

The present disclosure provides cab heater systems for electric vehicles. The first system includes a combustion chamber having a combustor inlet, a combustor outlet, and a hydrogen storage fluidly coupled to the combustor inlet configured to supply hydrogen to the combustor for combustion. The second system includes a fluid circulation pump, one or more cabin heat exchangers, a heat transfer tube fluidly connected to the fluid circulation pump and to the one or more cabin heat exchangers, and an insulated tank. The insulated tank includes a tank heat exchanger fluidly connected to the heat transfer tube, a resistance heater, and a phase change material. In the charging mode, the resistance heater provides heat to the phase change material and to the tank heat exchanger, while in the heating mode, the fluid circulation pump provides heat to the tank heat exchanger and to the one or more cabin heat exchangers.

A combustion chamber assembly unit, for a fuel-operated vehicle heater, includes a combustion chamber housing (12) with a combustion chamber (18) defined by a circumferential wall (14) and by a bottom area (16). A flame tube (30) follows the circumferential wall (14) in the direction of a housing longitudinal axis (L) and encloses a waste gas flow space (32) that is open in the direction of the housing longitudinal axis (L). A flame diaphragm (34) has a flow-through opening (60). A waste gas backflow space (46) is formed between the flame tube (30) and a housing (38) enclosing same. The waste gas flow space (32) is open towards the waste gas backflow space (46) in a first axial end area (48) of the waste gas backflow space (46). A catalytic converter device (54), through which combustion waste gases can flow, is provided in the waste gas backflow space (46).

A method is provided for operating a fuel-operated vehicle heater (10) during a start phase of combustion operation. The heater includes a combustion air feed device (26) feeding air and a fuel feed device (22) feeding fuel (B) to a burner area (12) with a combustion chamber (16). An electrically energizable ignition element (32) ignites a fuel/air mixture formed. The method includes energizing the ignition element (32) in a preheating phase prior to the fuel feed, at a time of entry into an ignition phase, detecting electrical resistance of the ignition element (32) and determining a desired resistance based on the electrical resistance of the ignition element (32) detected and operating the ignition element (32) in a resistance-regulating operating mode during the ignition phase such that an actual resistance of the ignition element (32) is in the range of the determined desired resistance of the ignition element (32).

A heating apparatus for generating a hot air flow comprises a single fan, a burner heating element and a resistance heating element. In this respect, an air passage that conducts air to be heated and a combustion air passage that leads to a burner adjoin the fan downstream, wherein a combustion air flow in the combustion air passage can be controlled by a control element associated with the combustion air passage.

A vaporizing burner combustion chamber assembly unit, especially for a vehicle heater, includes a bottom part (32) with a bottom wall (34) and with a first circumferential wall (38) and a porous evaporator medium (42) at least partially covering a front side of the bottom wall, which is to face a combustion chamber (14). A ring-shaped holding part has a second circumferential wall (54) and a contact area (56) touching the porous evaporator medium. The first circumferential wall extends, from an outer edge area (36) of the bottom wall essentially in a longitudinal axis (L) direction of a bottom assembly unit (30), on a rear side of the first bottom wall facing away from a combustion chamber, in the direction away from the porous evaporator medium. The second circumferential wall extends at least partially over the first circumferential wall on its outer side and is fixed to same.