US Patent 9301638 Drink preparation machine

Provided is a drink preparation machine with an outer housing, which contains at least one ventilation element for ventilating an interior which is enclosed by the outer housing. In order to reduce the likelihood of penetration by dust, water and/or small objects, to allow simple and quick cleaning with reduced use of detergents and to achieve energy-saving operation of the drink preparation machine, the at least one ventilation element can be actuated to open and close.