散热是保证电源器适配安全、可靠工作的重要条件。温度过高，将引起电源适配器的性能指标发生变化，甚至引起电源适配器的失效，因此，控制好温升，使其不超过可靠性规定的限值是散热设计的根本任务。
Heat dissipation is an important condition to ensure the safe and reliable operation of the power adapter. If the temperature is too high, the performance index of the power adapter will change, even cause the failure of the power adapter. Therefore, the basic task of cooling design is to control the temperature rise well so that it does not exceed the reliability limit.
电源适配器的元器件都有一定的工作温度范围要求，如果超过其极限温度，将引起电源工作状态的改变，因而使电子设备不能稳定、可靠地工作，缩短其使用寿命，甚至造成电子设备的损坏。
The components of power adapter have a certain range of operating temperature requirements. If the limit temperature is exceeded, the working state of power supply will be changed, so that the electronic equipment can not work stably and reliably, shorten its service life, and even cause damage to the electronic equipment.
1、散热器的选用：散热器选择的原则是在保证充分散热的前提下，应尽量选用体积小、重量轻的散热器，这样可节省机内空间，减少电源适配器的总重量。
1. Selection of radiator: The principle of radiator selection is to ensure sufficient heat dissipation, should try to choose a small, light weight radiator, so as to save space in the machine, reduce the total weight of the power adapter.
2、散热器的安装：安装散热器时应尽量选用散热热阻小的安装方式。
2, radiator installation: when installing the radiator, we should try to choose a small heat dissipation method.
3、尽量减小界面热阻：散热器表面应平整、光洁，为减小散热器与功率半导体的接触热阻，应注意保持二者界面间的平整与光洁。如果界面既平整、光洁，又无氧化层时，其间可不加垫片，否则应涂以硅脂或加装导热垫片。
3. Minimizing the thermal resistance of the interface: The surface of the radiator should be smooth and clean. In order to reduce the contact thermal resistance between the radiator and the power semiconductor, it is necessary to keep the interface smooth and clean. If the interface is smooth and clean, and there is no oxide layer, there is no gasket, otherwise it should be coated with silicone grease or heat conductive gasket.
4、散热器的涂覆：为增加散热器的辐射能力，散热片表面应涂一层黑色油漆或氧化物等高辐射系数的涂层，应优先选用具有黑色涂层的散热器，并应保护涂层不受损坏。
4. Radiator coating: In order to increase the radiation capacity of the radiator, the surface of the radiator should be coated with a high radiation coefficient coating, such as black paint or oxide. The radiator with black coating should be preferred and the coating should be protected from damage.
5、散热器的安装：在散热器上安装功率器件时，其安装孔的尺寸应与功率半导体固定孔的尺寸相符，孔不宜太大，也不宜太小。
5. Radiator installation: When installing power devices on the radiator, the size of the installation hole should be the same as the size of the power semiconductor fixed hole, the hole should not be too big or too small.
6、功率半导体的安装位置：功率半导体应安装于散热器的中心。若在同一散热器上装多个功率半导体时，可先近似的按半导体功耗的比例将散热片分割成几部分，每个半导体尽量放在相应部分的中心位置，这样可使散热器均匀受热，提高散热效率。
6. Installation location of power semiconductor: power semiconductor should be installed in the center of radiator. If a plurality of power semiconductors are installed on the same radiator, the radiator can be divided into several parts approximately according to the power consumption ratio of the semiconductors. Each semiconductor should be placed in the center of the corresponding part as far as possible, so that the radiator can be heated evenly and the heat dissipation efficiency can be improved.
7、散热器的安放位置：应尽可能使散热器直接接触电源外部的空气流，使环境温度降低。同时可提高散热器对流换热的效果。
7. The location of the radiator: the radiator should be in direct contact with the air outside the power supply as far as possible to reduce the ambient temperature. At the same time, the effect of convection heat transfer of radiator can be improved.