A cooling array including a housing accommodating electrical built-in components and an air conditioning device that is connected to a heat source of the electrical built-in components by a coolant-carrying inlet line and a return line. To simply air-condition complex systems having a plurality of electrical built-in components, several device inlet lines come out from the inlet line and device return lines come out from the return line and each electrical built-in component is assigned at least one device inlet line and at least one device return line.