Switch

The invention provides a switch, and relates to the technical field of switches, and the switch comprises a housing which is provided with an accommodation cavity, and the accommodation cavity comprises an air channel; the power supply assembly is arranged in the accommodating cavity; the shell is provided with an air inlet and an air outlet, the air inlet and the air outlet are both connected with the air channel so that air can enter the air channel from the air inlet and be exhausted from the air outlet, and at least part of the power source assembly is arranged in the air channel so that the air entering the air channel can exchange heat with the power source assembly to reduce the temperature of the power source assembly. The heat dissipation device is suitable for the heat dissipation process of the switch and is used for solving the problems of large fan heat dissipation noise and improvement of the overall power consumption of the switch. 本申请提供一种交换机，涉及交换机技术领域，该交换机包括：形成有容纳腔的壳体，容纳腔包括风道；设置于容纳腔内的电源组件；壳体上开