近年来，我国新能源汽车生产销售快速增长，中央、地方各项扶持政策的协同效果得以充分发展。根据国家发展改革委等四部门于2015年11月17日发布的《电动汽车充电基础设施发展指南（2015-2020年）》提出，到2020年，新增集中式充换电站超过1.2万座，分散式充电桩超过 480万个，以满足全国500万辆电动汽车充电需求。建设投资规模达1240亿元，市场将迎来巨大发展机遇。 In recent years, the production and sales of new energy vehicles in China have grown rapidly, and the synergistic effect of the central and local support policies has been fully developed. According to the national development and reform commission issued by the four departments on November 17, 2015 of the electric vehicle charging infrastructure development guide (2015-2020) proposed that by 2020, the new centralized charge in power plant more than 12000, distributed in more than 4.8 million charging piles, in order to satisfy the demands of the country's 5 million electric car charging. With a total investment of 124 billion yuan, the market will see huge development opportunities. 相比于其他电源，充电桩的系统散热量要大的多，对系统热设计要求极为严格。直流充电桩的功率范围在30KW、60KW和120KW，效率普遍在95%左右，那么其中5%就转化为热损耗，其热损耗将是1.5KW、3KW和6KW。对于户外设备，这些热量必然要排出设备之外,否则将会加速设备的老化，同时需要做好防水防尘的处理，以防出现电子设备短路和信号紊乱的情况。 Compared with other power sources, the charging pile system has a large amount of heat energy and is extremely strict in thermal design of the system. The power range of dc charging piles is 30KW, 60KW and 120KW, and the efficiency is generally around 95%, then 5% of them will be converted to heat loss, and the heat loss will be 1.5kw, 3KW and 6KW. For outdoor equipment, the heat must discharge device, otherwise it will accelerate the aging of equipment, need to be waterproof and dustproof processing at the same time, in case of short circuit in electronic equipment and signal disturbance. 目前常用的制冷模式有四种：自然冷却（主要靠散热片）、强制风冷、水冷却、空调。由于受到体积、成本、可靠性等因素的影响，目前大部分公司都是采用强制风冷的方式进行处理。那么，这势必会带来尘埃、腐蚀性气体、湿气等干扰。充电桩散热分为模块散热和机箱整体散热两部分，因为充电模块是内置在里面，所以防护措施主要体现在机箱设计上面。最简单经济的一种设计是在箱体的进出风口做成百叶窗式，然后在出风口加上风扇，把模块风扇排出的热量抽走。 There are four kinds of refrigeration modes commonly used: natural cooling (mainly by heat sink), forced air cooling, water cooling and air conditioning. Due to the influence of factors such as volume, cost and reliability, most companies are now using forced air cooling. This, then, is bound to bring about dust, corrosive gases, moisture and so on. The heat dissipation of charging pile is divided into module cooling and the overall cooling of the chassis. Since the charging module is built in, the protective measures are mainly reflected in the design of the chassis. One of the simplest economic designs is to make a louver form in the inlet and outlet of the box, then exhaust the heat from the fan in the outlet and fan. 这种方法能起到一定的防护作用，时间久了还是难免会有灰尘和湿气进入。如果想要更好的防护效果，可以采用封闭式冷热隔离风道，对内部进行冷热隔离：中隔板使冷热流体完全分开，通过导热载体以及顶部风机高效降温，两端的进出风口选用百叶窗过滤网组，有效防水防尘。 This kind of method can have a certain protective effect, time is long still unavoidable will have dust and moisture enter. If you want a better protective effect, can use enclosed cold heat isolation of air duct, to cold heat isolation: internal partition make completely separated from the cold and hot fluid, through thermal carrier and the top of the high efficiency cooling fan, into the outlet chooses the shutter at the ends of the screen pack, waterproof and dustproof.