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 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).

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.

A fluid heating system intended for use in recreational vehicles that circulates glycol in a system loop with various heat sources and other devices that distribute this heat to an enclosure or a domestic water system. It has a system controller operationally connected to a remove tactile display unit that allows for the input of the operation parameters to the system controller. The control unit is operatively connected for data and signal transfer to the user's cell phone via a non-internet connected localized wi-fi network. This provides the user with system status information, fault codes and allows selected operational functions and resets to be remotely initiated that heretofore required local manipulation. It also incorporates altimeter to allow the furnace controller to maximize its burn efficiency.

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.

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.

A heat exchanger unit, especially for a vehicle heater, includes a heat exchanger housing (12) with a heat transfer medium inlet opening (22) and with a heat transfer medium outlet opening (24). At least one connecting branch (26, 28), is inserted or can be inserted into the heat transfer medium inlet opening (22) and the heat transfer medium outlet opening (24). At least one housing locking element meshing recess (34, 36, 38, 40) is provided in association with the at least one connecting branch (26, 28) in the heat exchanger housing (12). A locking element (44), locking the connecting branch (26, 28) on the heat exchanger housing (12), is positioned or can be positioned such that the locking element (44) meshes with the at least one housing locking element meshing recess (34, 36, 38, 40) and with at least one connecting branch locking element meshing recess (42).

A heating apparatus comprising a tank having a tank inlet, a tank outlet, a heat exchanger inlet and heat exchanger outlet. A heat exchanger is located in the tank and comprises a hollow body having a mouth coupled to the heat exchanger inlet and a flue outlet coupled to the heat exchanger outlet. A burner device has a burner head that is located at least partly located in the mouth inside said hollow body.

A heating apparatus comprising a tank having a tank inlet, a tank outlet, a heat exchanger inlet and heat exchanger outlet. A heat exchanger is located in the tank and comprises a hollow body having a mouth coupled to the heat exchanger inlet and a flue outlet coupled to the heat exchanger outlet. A burner device has a burner head that is located at least partly located in the mouth inside said hollow body.

Disclosed is a vehicle-mounted gas water heater, wherein the water flow pipe comprises a water inflow section, a first heating section, a second heating section and a water outflow section, wherein the water inflow section is shortened, wherein the water inflow section is shortened, a heating section is rapidly heated directly by the combustion heating device, and the second heating section is heated by winding on the heat exchanger, so that, formation of condensed water at the water inflow section is reduced due to reduction of surface area, condensed water formed on the surface of the first heating section is rapidly evaporated, and it is difficult for condensed water to form on the surfaces of the second heating section and the outflow section.