Abstract: A module assembly for a refrigerant circuit of a motor vehicle. The module assembly includes an inner heat exchanger and a heat exchanger through which a coolant can flow. The inner heat exchanger is designed to transfer heat from a high-pressure side of the inner heat exchanger to a low-pressure side of the inner heat exchanger. The heat is introducible into a refrigerant compressible by the compressor by operating a compressor of the refrigerant circuit. The heat exchanger is subjected to refrigerant that can be supplied to the heat exchanger from the high-pressure side of the inner heat exchanger and can be expanded by an expansion device of the module assembly. The module assembly is formed separately from an evaporator of the refrigerant circuit and/or separately from a condenser of the refrigerant circuit. and includes a support device separate from the heat exchanger, on which the heat exchanger is held.

Abstract: A method for operating a refrigeration system for a motor vehicle. The method includes setting an operating mode of the refrigeration system having active primary line and inactive secondary line or having active secondary line and inactive primary line; detecting the pressure in the inactive line; and activating and extraction of refrigerant from the inactive line into the active line by lowering the pressure in the active line to a value below the pressure in the inactive line and by opening the relevant valve device.

Abstract: A module assembly for a refrigerant circuit of a motor vehicle. The module assembly includes an inner heat exchanger and a heat exchanger through which a coolant can flow. The inner heat exchanger is designed to transfer heat from a high-pressure side of the inner heat exchanger to a low-pressure side of the inner heat exchanger. The heat is introducible into a refrigerant compressible by the compressor by operating a compressor of the refrigerant circuit. The heat exchanger is subjected to refrigerant that can be supplied to the heat exchanger from the high-pressure side of the inner heat exchanger and can be expanded by an expansion device of the module assembly. The module assembly is formed separately from an evaporator of the refrigerant circuit and/or separately from a condenser of the refrigerant circuit. and includes a support device separate from the heat exchanger, on which the heat exchanger is held.

Abstract: A method for operating a refrigeration system for a motor vehicle. The method includes setting an operating mode of the refrigeration system having active primary line and inactive secondary line or having active secondary line and inactive primary line; detecting the pressure in the inactive line; and activating and extraction of refrigerant from the inactive line into the active line by lowering the pressure in the active line to a value below the pressure in the inactive line and by opening the relevant valve device.