The invention relates to an evaporator burner (1; 101) for a mobile heating device, comprising: a combustion chamber (3), a fuel feed line (4) for feeding liquid fuel, and an evaporator for evaporating fed fuel. The evaporator has a support body (6; 106) made of a nonporous material, comprising a fuel preparation surface (6a; 106a) which faces the combustion chamber (3) and which comes into contact with the liquid fuel. A surface structuring (11) with a plurality of depressions (11a) and elevations (11b) is introduced into the fuel preparation surface (6a; 106a) and/or into a support body (6; 106) rear face (6b; 106b) facing away from the fuel preparation surface.

A vehicle heater includes a plurality of heating units (12, 14) as well as a heat exchanger device (32) for transmitting heat provided in the heating units (12, 14) to a heat carrier medium (M). The heat exchanger device (32) includes, associated with each heating unit (12, 14), a heat exchanger zone for transmitting heat provided in the heating unit (12, 14) to the heat carrier medium (M).

There is disclosed a vehicle air conditioner which is capable of achieving protection of an air flow passage without hindrance, even when a temperature sensor which detects a temperature of an electric heater fails. When a detected value of an electric heater temperature sensor detecting the highest temperature among a plurality of electric heater temperature sensors 61 to 64 is in excess of a predetermined threshold value, a controller executes a protecting operation of limiting energization to the electric heater or stopping the energization. The controller calculates an estimated value Thtrest of the temperature which is calculated back from a consumed power of the electric heater, and when one of the electric heater temperature sensors fails, the controller executes the protecting operation on the basis of the highest value among the detected values of the temperature sensors other than the electric heater temperature sensor and the estimated value.

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).

An auxiliary heater with a casing enclosing internal components which components include a heat exchanger separate from and outside the coolant tank and wherein two coolant loops each have their own coolant pumps and wherein a potable water loop exchanges heat with coolant within the heat exchanger. A control circuit provides enhanced coolant flow through the heat exchanger when the call for hot water is significant without significantly reducing the temperature of the hot water being used. A level switch within the coolant tank prevents coolant pumps from running without pump coolant and a filling and air purging operation improves the initial filling operation of the auxiliary heater with coolant and also prevents the coolant pump from running dry. A user switch may dedicate the hot coolant from the coolant tank to either the production of hot potable water or it may share both hot water and space heating.

A delivery device provides two medium flows guided separately from one another in a fuel-operated vehicle heater. The delivery device includes a first delivery wheel (14) rotatable about a first rotation axis (A) for delivering a first medium, a second delivery wheel (16) rotatable about a second rotation axis (A) for delivering a second medium, as well as a drive motor (12) for driving the first delivery wheel (14) and the second delivery wheel (16). At least one delivery wheel (16) is coupled with the drive motor (12) via a magnetic coupling device (60).

A heat exchanger arrangement, especially for a vehicle heater, includes a pot-like heat exchanger housing (12) extending in the direction of a longitudinal axis (L) of the housing. The heat exchanger housing includes an outer housing part (14) with the outer circumferential wall (18) and with an outer bottom wall (20) as well as an inner housing part (16) with the inner circumferential wall (22) and with an inner bottom wall (24). A heat carrier medium flow connecting piece (50, 52), open towards the heat carrier medium flow space, is provided at an axial end area (44) of the outer circumferential wall of the outer housing part, the end area being located at a distance from the outer bottom wall. A waste gas flow connecting piece (30) is open towards an interior space (26) of the heat exchanger housing, which interior space is enclosed by the inner wall.

There is provided a hybrid type heating system capable of heating air and water together. As an embodiment, the present invention provides a technology of carrying out heating not using a battery in an electric vehicle, a technology of heating a battery so that performance of the battery does not decrease under a low outdoor temperature condition, and a technology of carrying out heating with not decreasing driving distance of the electric vehicle or increasing the driving distance of the electric vehicle.

Described herein are two-stage catalytic heating systems and methods of operating thereof. A system comprises a first-stage catalytic reactor and a second-stage catalytic reactor, configured to operate in sequence and at different operating conditions, For example, the first-stage catalytic reactor is supplied with fuel and oxidant at fuel-rich conditions. The first-stage catalytic reactor generates syngas. The syngas is flown into the second-stage catalytic reactor together with some additional oxidant. The second-stage catalytic reactor operates at fuel-lean conditions and generates exhaust. Splitting the overall fuel oxidation process between the two catalytic reactors allows operating these reactors away from the stoichiometric fuel-oxidant ratio and avoiding excessive temperatures in these reactors. As a result, fewer pollutants are generated during the operation of two-stage catalytic heating systems. For example, the temperatures are maintained below 1.000 C. at all oxidation stages.