The invention discloses a heat dissipation structure and a heat dissipation system for a direct-current charging pile, and relates to the technical field of electric vehicle charging, the direct-current charging pile comprises a host and a charging gun, and the charging gun comprises a charging gun main body, an insulating sleeve and a plurality of cable sub-pipelines; the heat dissipation structure comprises a cold storage pool, a flow guide pipe and a power pump; the flow guide pipe comprises a branch pipe arranged in the charging gun main body, the branch pipe is divided into a flow inlet pipe and a flow return pipe, the flow inlet pipe is inserted and wound among the plurality of cable sub-pipelines, and the flow return pipe is tightly attached to the inner side wall of an insulating sleeve of a cable; the device further comprises an electric valve and a control chip, and when the power pump is started and the electric valve is in a normally open state, the control chip generates a preset interrupt signal to adjust intermittent start and stop of the electric valve, so that the inflow pipe shakes to change the contact position of the inflow pipe and the cable sub-pipeline. The charging gun is subjected to linkage heat dissipation through the heat dissipation structure of the host, the heat dissipation operation cost of the charging pile on the charging gun is reduced, and the heat dissipation effect of the charging gun is improved.

本发明公开了一种用于直流充电桩的散热结构及散热系统，涉及电动车充电技术领域，直流充电桩包括主机和充电枪，充电枪包括充电枪主体、绝缘套管和若干个电缆子管道；散热结构包括蓄冷池、导流管以及动力泵；导流管包括设置在充电枪主体内部的支流管，支流管划分有进流管和回流管，进流管穿插绕设在若干个电缆子管道之间，回流管紧贴电缆的绝缘套管内侧壁；还包括电动阀门和控制芯片，在动力泵启动且电动阀门处于常开状态下，控制芯片产生预设中断信号调整电动阀门间歇性启停，以使进流管产生抖动来改变进流管与电缆子管道的接触位置。通过主机的散热结构对充电枪进行联动散热，降低充电桩对充电枪的散热运行成本，提高充电枪的散热效果。