A first heater heats a vehicle compartment by using cooling water of the internal combustion engine. A second heater heats the vehicle compartment by using electrical power supplied by the electrical storage device. The controller during driving of the internal combustion engine, when a temperature of the cooling water is equal to or higher than a reference temperature, controls the internal combustion engine to stop; when the second heater is operated during driving of the internal combustion engine, when a state quantity indicating a state of charge of the electrical storage device is equal to or higher than a threshold, controls the second heater such that an amount of heat generation of the second heater is higher than that generated when the state quantity is less than the threshold; and sets the reference temperature to be low as compared to when the state quantity is less than the threshold.

A heating temperature is appropriately estimated according to an operation mode to achieve comfortable vehicle interior air conditioning. A vehicular air conditioning device 1 includes a compressor 2, an air flow passage 3, a radiator 4 for heating air to be supplied to a vehicle interior, a heat absorber 9 for cooling the air to be supplied to the vehicle interior, and a heat pump controller. The heat pump controller calculates a heating temperature TH being the temperature of air on a leeward side of the radiator and use the heating temperature in control, and calculates the heating temperature TH using an estimation formula which differs depending on the operation mode.

A vehicle-mounted temperature controller includes a low temperature circuit and a refrigeration circuit. The low temperature circuit has a heat generating equipment heat exchanger exchanging heat with heat generating equipment, a radiator, a first heat exchanger, and a three-way valve. The refrigeration circuit has a second heat exchanger discharging heat from the refrigerant to a high temperature circuit to make the refrigerant condense, and the first heat exchanger making the refrigerant absorb heat from the cooling water to make the refrigerant evaporate. The low temperature circuit includes a first partial circuit through which the cooling water flows through the radiator and the first heat exchanger, and a second partial circuit through which the cooling water flows through the heat generating equipment heat exchanger without passing through the radiator and the first heat exchanger. The cooling water circulates simultaneously and separately at these first partial circuit and second partial circuit.

A radiant heating device for producing radiant heat in a passenger compartment of a motor vehicle includes a heating surface for emitting heat radiation, a heating element for providing heating power, a first temperature sensor for detecting a first temperature in a specific spot and for providing a corresponding first temperature indication, and a second temperature sensor for detecting a second temperature on the surface and for providing a corresponding second temperature indication. In order to detect a local over-heating of the heating surface, a difference between the two temperature indications is determined. In the event of a defect, a protective operating mode is then selected.

A control system for a burner assembly used in vehicles and boats particularly for a coolant storage type heater and a method of operating the control system. Sensors for producing a resistance change as a function of temperature are utilised to send a continuous signal to the control system from both the coolant and the potable water by being in contact with coolant and potable water throughout control system operation. The sensors and the control system allow flexible heater operation and may further dependent upon the user where commands can be entered to a touch screen connected to the control board of the control system.

An operating method for an electric heater may include heating a fluid passing the electric heater to an outlet temperature by at least one heating element and operating the electric heater in one of a normal mode or a protection mode. In the normal mode, the at least one heating element may be supplied with at least one of a direct current and a direct voltage. In the protection mode, electrical power supplied to the at least one heating element may be regulated by pulse width modulation. The electric heater may be operated in the normal mode if a reference temperature is less than or equal to a critical temperature and in the protection mode if the reference temperature is greater than the critical temperature.

The present application discloses an electric vehicle, and an electric heating device and a control system thereof. The electric heating device includes: n resistance heating units, independently electrically connected in parallel with each other; n switches, electrically connected in series with respective resistance heating units for independently controlling power-on or power-off of the respective resistance heating units; and a controller, configured to selectively turn on or turn off any at least one of the n switches according to a working condition of the electric vehicle, wherein n is a natural number equal to or greater than 2.

A vehicle cabin thermal management system includes a first heat exchange system adapted to operate primarily based upon a convective mode of heat transfer within a vehicle cabin, a second heat exchange system adapted to operate primary based upon a non-convective mode of heat transfer within the vehicle cabin, and a controller in communication with the first heat exchange system and the second heat exchange system, wherein the controller controls a thermal output of the second heat exchange system, and wherein the controller controls the first heat exchange system to reduce the operating level of the first heat exchange system in response to the controller operating the second heat exchange system.

A heat pump air-conditioning system for a vehicle includes a refrigerant circuit, an auxiliary heater, and a control unit. The control unit compares a difference between a target blowout temperature and an actual blowout temperature with a predetermined first temperature threshold value in magnitudes, The control unit adjusts an opening degree of a first expansion valve and an opening degree of a second expansion valve. The control unit adjusts an output power of the auxiliary heater. The control unit executes a plurality of different modes of a heat pump air-conditioning to control the actual blowout temperature to approach and maintain at the target blowout temperature.

A method (7) for controlling the temperature of a heating surface (5) of a heating panel (1) suitable for being installed inside a passenger compartment of a vehicle, for example a motor vehicle, this surface (5) being likely to be touched by a passenger in said passenger compartment, the method (7) involving controlling the temperature of said heating surface (5) as a function of at least one item of data representative of the profile of a passenger accommodated in the passenger compartment and/or at least one item of data representative of the heating surface (5) of the heating panel (1). The invention also relates to a corresponding control device (15).