A radiation heating device includes: a planar heat generation layer; a heat generation portion that is provided in the heat generation layer and that generates heat by energization; a plurality of heat radiation portions that are disposed in the heat generation layer and that radiate heat transferred from the heat generation portion; a low heat conduction portion that is provided around each of the heat radiation portions and that has a lower heat conductivity than the heat radiation portions; and a contact detection unit that detects contact of an object with the heat generation layer. The radiation heating device further includes an energization amount decrease unit that decreases an energization amount of the heat generation portion when the contact detection unit detects the contact of the object with the heat generation layer.

A device for raising a temperature in at least one portion of a vehicle from a low temperature value to a temperature value increased above this, has at least one electronic component producing waste heat. The at least one electronic component is formed as a processor. Furthermore, a controller is provided, being designed to command the processor to provide a computing capacity in a heating mode, and to supply the waste heat generated upon performing at least one computation of the processor to the at least one portion of the vehicle. The disclosure furthermore relates to a method for raising a temperature of at least one portion of a vehicle from a low temperature value to a temperature value increased above this.

An arrangement is provided for heating a vehicle interior of a motor vehicle. The arrangement comprises an air duct extending along a direction of extension and being defined by a duct housing, for air to flow through, which, in a cross section perpendicular to the direction of extension, comprises a first duct zone, via which the air can be introduced into a first interior zone of the vehicle interior, and a second duct zone, via which the air can be introduced into a second interior zone of the vehicle interior. The arrangement further comprises at least one heating device arranged in the air duct, comprising a plurality of heating sections, which extend at right angles to the direction of extension in the air duct (and have electrical PTC heating elements.

A vehicle air conditioning apparatus includes an air conditioning case including a case body having a case opening that is open to an air conditioning opening, and a case cover that can open and close the case opening. The case cover can be attached/detached to/from the case body via the air conditioning opening outside of the vehicle interior. An evaporator and a heater can be attached/detached to/from the case body via the air conditioning opening outside of the vehicle interior, while the case cover is removed from the case body to open the case opening.

A temperature control device for heating an interior space of a vehicle and/or units of the vehicle, includes a number of electrically operated heating elements, electric leads, by means of which the heating element can be connected to the voltage supply of the vehicle, and at least one heat transfer section. A fluid flows through the at least one heat transfer section and transfers the heat generated by the heating elements to a fluid. The at least one heat transfer section includes a thermally conductive first material, and the heating elements and the electric leads are enclosed by an electrically non-conductive and thermally conductive second material. A related method is also disclosed for producing the present temperature control device.

A heating medium heating device includes: a plate-shaped PTC heater formed by making compressive heat transfer sheets cover individually two surfaces of a PTC element; a first heating medium distribution box including a first matching surface in which a PTC heater accommodating recess is formed, the PTC heater accommodating recess including a bottom surface with which the compressive heat transfer sheet located on a first-surface side of the PTC heater is in close contact; a second heating medium distribution box including a flat second matching surface that closes the PTC heater accommodating recess by being bonded, liquid-tightly via a liquid gasket, to the first matching surface, the second matching surface being a surface with which the compressive heat transfer sheet located on a second-surface side of the PTC heater is in close contact; and a barrier part rising from a peripheral edge part of the PTC heater towards the second matching surface.

Provided is a positive temperature coefficient (PTC) unit for a vehicle heater. The PTC unit according to an exemplary embodiment of the present invention includes: a heat generation part which includes PTC elements; and a heat radiation part which is provided on at least one surface of the heat generation part and includes a heat radiation base material and a heat radiation film provided on at least a portion of an outer surface of the heat radiation base material to improve heat radiation performance. According to the present invention, improved heat radiation performance may be exhibited, and concurrently, heat radiation performance due to excellent durability may be exhibited for a long period of time without a structural change for increasing a specific surface area of a heat radiation part while reducing an air ventilation property, so as to improve heat radiation performance. In addition, since an air ventilation property of the heat radiation part is increased, it is possible to prevent increases in noise and power consumption due to excessive use of peripheral devices such as a fan. Furthermore, since it is possible to prevent overheating of a PTC module and overload of a PTC module control circuit, which are caused by a reduction in the air ventilation property of the heat radiation part, a high-priced and high performance control circuit may not be required, thereby implementing a PTC heater for a vehicle with reduced production costs.

A vehicle air conditioning device which is capable of inhibiting liquid return to a compressor and generation of noise due to bumping in an accumulator. There are executed a heating mode to close a solenoid valve 17, open a solenoid valve 21, let a refrigerant from a compressor 2 radiate heat in a radiator 4, decompress the refrigerant through an outdoor expansion valve 6, let the refrigerant absorb heat in an outdoor heat exchanger 7, and send the refrigerant to an accumulator 12, and a dehumidifying and cooling mode to open the solenoid valve 17, close the solenoid valve 21, decompress the refrigerant through an indoor expansion valve 8, let the refrigerant absorb heat in a heat absorber, and send the refrigerant to the accumulator. When shifting from the heating mode to the dehumidifying and cooling mode, the solenoid valve 21 is opened for a predetermined period of time.

An air-conditioning device includes: a compressor, an external heat exchanger, an evaporator, a fluid-cooled condenser, a thermostatic expansion valve, an internal heat exchanger, a fixed restrictor, a first flow-path switching valve, and a second flow-path switching valve configured to switch flow path of cooling medium so as to bypass the fluid-cooled condenser and the fixed restrictor at cabin-cooling operation time.

A liquid heating device includes: a liquid circulation circuit configured to allow circulation of antifreezing fluid therethrough; an electric heater provided in the liquid circulation circuit, the electric heater being configured to heat the antifreezing fluid circulating through the liquid circulation circuit; and a controller serving as a controlling unit configured to control output of the electric heater. The controller restricts the output of the electric heater when viscosity of the antifreezing fluid exceeds a predetermined threshold viscosity.