Heat exchanger

摘要

The vaporizer (1) has a refrigerant fluid channel provided between stacked disc portions. Inlet and outlet opening portions (6,7) are provided for the supply and removal of fluid from the stacked disc portions. Several through-holes (4) are provided in the stacked disc portions. An expansion valve (26) is integrated in a main portion. The refrigerant fluid is passed into the refrigerant fluid channel through a dip tube (11). A switching-off unit (13) is integrated in the main portion. The switching-off unit is provided for closing the refrigerant fluid channel. Independent claims are included for the following: (1) a battery heating and/or cooling system of motor vehicle; and (2) a motor vehicle air-conditioning apparatus.