When "24V DC Cooling Fan" PCB in a small number of devices made larger when the heat can be applied on the heat generating device or the heat sink heat transfer tube, when the temperature has not come down, may be employed with the fan of the radiator, in order to enhance the cooling effect . When a large amount of heating devices, can be a big heat shield, which is based on the location and the level of "24V DC Cooling Fan" PCB board devices and custom heat sink or special on a large flat radiator cutout different elements height position. The integral buckle in the heat shield element surface, and in contact with each radiating element. However, due to "24V DC Cooling Fan" at the level of consistency is poor-chip components, the cooling effect is not good. Usually in the component surface plus a soft thermal phase change thermal pad to improve heat dissipation.