There is provided a vehicle air conditioning device of a heat pump system which improves comfortability when changing to heating only by an auxiliary heating device. The device includes a heating medium circulating circuit 23 to heat air to be supplied from an air flow passage 3 to a vehicle interior, and when shifting to the heating of the vehicle interior only by the heating medium circulating circuit 23 in a heating mode, a controller executes a shifting control to increase a heating capability of the heating medium circulating circuit 23 prior to stopping a compressor 2 and decrease a heating capability of a radiator 4 in accordance with the increase of the heating capability of the heating medium circulating circuit 23.

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. Resistors for producing a resistance change as a function of temperature are utilised to send temperature signals to the control system from both the coolant and the potable water by being in contact with coolant and potable water throughout burner operation. The use of the thermistor signals together with the signals from aquastats allows flexible heater operation and may be dependent upon the user where commands can be entered in a touch screen connected to the control board of the control system.

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 heater unit emits radiation heat caused by heat generated with a heat generation unit when energized. The heater device includes a contact detection unit having a contact detection region overlying the heater unit to detect a contact by an object on the contact detection region. The heater device includes a determination unit to determine, when a contact by the object on the contact detection region is detected by the contact detection unit, whether the contact is for a predetermined switching operation. A control unit stops energization of the heat generation unit when the determination unit determines that the contact is not for the predetermined switching operation. The control unit switches between a start and a stop of energization of the heat generation unit when the determination unit determines that the contact is for the switching operation.

There is provided a vehicle air conditioning device of a heat pump system which improves comfortability when changing to heating only by an auxiliary heating device. The device includes a heating medium circulating circuit 23 to heat air to be supplied from an air flow passage 3 to a vehicle interior, and when shifting to the heating of the vehicle interior only by the heating medium circulating circuit 23 in a heating mode, a controller executes a shifting control to increase a heating capability of the heating medium circulating circuit 23 prior to stopping a compressor 2 and decrease a heating capability of a radiator 4 in accordance with the increase of the heating capability of the heating medium circulating circuit 23.

A heating apparatus for a vehicle includes an air heating unit configured to heat air conditioning air to be sent into a vehicle cabin, a contact heating unit configured to heat a member that is in contact with a body of an occupant in the vehicle cabin, and an electronic control unit. A heat source of the air heating unit and a heat source of the contact heating unit each are supplied with an electric power from one or more batteries. The electronic control unit is configured to decrease an electric power that is supplied to the heat source of the air heating unit when the heat source of the contact heating unit is on as compared to an electric power that is supplied to the heat source of the air heating unit when the heat source of the contact heating unit is off.

A radiant heating system includes a radiant heating zone, a first radiant heating feature on a first side of the radiant heating zone and a second radiant heating feature on a second side of the radiant heating zone opposite the first side. A method of radiant heating is also disclosed.

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.

An operating method for an electric heater having at least one control unit with at least one temperature sensor measuring a reference temperature, and at least one heating element having a positive temperature coefficient mode above a critical temperature and a negative temperature coefficient mode below the critical temperature, may include heating a fluid passing the electric heater to an outlet temperature by the 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 the reference temperature is less than or equal to the critical temperature, and in the protection mode if the reference temperature is greater than the critical temperature.

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.