An air conditioning device includes a circuit switching valve that switches to a circuit in which a refrigerant circulates in an order of a heater, a refrigerant-air heat exchanger, a pressure reducer, a refrigerant-outside air heat exchanger, and a suction port of the compressor in a desorption heating mode in which heating of an air-conditioning target space is performed and moisture is desorbed from an adsorber. The circuit switching valve switches to a circuit in which the refrigerant circulates in an order of the heater, the pressure reducer, the refrigerant-outside air heat exchanger, and the suction port of the compressor, bypassing the refrigerant-air heat exchanger, in an adsorption heating mode in which the heating of the air-conditioning target space is performed and moisture is adsorbed by the adsorber. The air blower blows inside air as the blown air toward the refrigerant-air heat exchanger in the adsorption heating mode.

An air conditioning device includes a circuit switching valve that switches to a circuit in which a refrigerant circulates in an order of a heater, a refrigerant-air heat exchanger, a pressure reducer, a refrigerant-outside air heat exchanger, and a suction port of the compressor in a desorption heating mode in which heating of an air-conditioning target space is performed and moisture is desorbed from an adsorber. The circuit switching valve switches to a circuit in which the refrigerant circulates in an order of the heater, the pressure reducer, the refrigerant-outside air heat exchanger, and the suction port of the compressor, bypassing the refrigerant-air heat exchanger, in an adsorption heating mode in which the heating of the air-conditioning target space is performed and moisture is adsorbed by the adsorber. The air blower blows inside air as the blown air toward the refrigerant-air heat exchanger in the adsorption heating mode.

A heating device is provided for an air treatment unit with at least one first assembly and a second assembly, wherein the first assembly has at least one receiving element and the second assembly has at least one fixing element. The receiving element and the fixing element are designed such that the receiving element and the fixing element can be connected with respect to one another in a predefined orientation region, in particular in a predefined angular region.

A heating device is provided for an air treatment unit with at least one first assembly and a second assembly, wherein the first assembly has at least one receiving element and the second assembly has at least one fixing element. The receiving element and the fixing element are designed such that the receiving element and the fixing element can be connected with respect to one another in a predefined orientation region, in particular in a predefined angular region.