空气质量比较差时，有些人会带上口罩，来过滤掉空气中的杂质。搅拌车也是有“口罩”的，那就是空气滤清器。那么自上料水泥搅拌车的空气滤清器什么时候更换？

When the air quality is poor, some people will wear masks to filter impurities in the air. The mixer also has a "mask", that is, an air filter. When will the air filter of the mixer be replaced?

要了解空气滤清器的工作原理，搅拌车启动时，发动机在吸入空气和燃油混合之前，空气滤清器的功能就是滤掉空气中的灰尘、碳、部分的水蒸气及其它的杂物，从而保证清洁的空气进入到气缸中。

To understand the working principle of the air filter, the function of the air filter is to filter out the dust, carbon, part of the water vapor and other impurities in the air before the engine inhales air and mixes fuel when the mixer is started, so as to ensure that clean air enters the cylinder.

在理论上每单位体积的燃油燃烧时，大约需要1万单位体积的清洁空气。一般情况下，制造商推荐空气滤清器正常维护的更换周期为4.8万Km,且每2.4万Km要进行一次常规检查；所以保守的维护更换周期为2.4万Km，搅拌车所处的工作环境比较差，维护周期要相应的减少一些。

In theory, 10000 units of clean air are required for the combustion of fuel per unit volume. In general, the manufacturer recommends that the replacement cycle for normal maintenance of the air filter is 48000 km, and a routine inspection should be carried out every 24000 km; Therefore, the conservative maintenance and replacement cycle is 24000 km, and the working environment of the mixer is relatively poor, so the maintenance cycle should be reduced accordingly.

在大气中含有三种密度不同的基本颗粒污染物，即灰尘、残渣和碳粒。如果是在开放式的高速公路上，灰尘的含量较建筑工地低一些，灰尘浓度较大的区域，即建筑工地，搅拌站，风沙区域，在这些地方工作的搅拌车，它的空气滤清器的检验和更换频率要高一些。

There are three basic particulate pollutants with different densities in the atmosphere, namely dust, residue and carbon particles. If it is on the open expressway, the dust content is lower than that of the construction site, and the areas with higher dust concentration, namely the construction site, mixing plant, and wind blown sand area, the inspection and replacement frequency of the air filter of the mixer truck working in these areas should be higher.

而在高速公路和交通比较拥堵的区域，因为搅拌车的排放物集中，所以空气中碳的含量明显偏高，对于滤清器的检查更应该仔细，尤其是滤清器的内部褶皱处；有时候，滤清器的外部看似清洁，但是其实内部已经非常脏了，因此须尽快更换。

However, in the expressway and areas with heavy traffic, the carbon content in the air is obviously high because of the concentration of emissions from the mixer, so the filter should be checked more carefully, especially the internal wrinkles of the filter; Sometimes, the outside of the filter looks clean, but the inside is very dirty, so it must be replaced as soon as possible.

搅拌车的工作场所一般是灰尘较大的搅拌站和建筑工地，它的空气滤清器就显得尤为重要，对它的保养要十分用心，否则就会造成发动机的非正常磨损，减少发动机的使用寿命，所以要定期进行检查维护并更换，注意事项就来我们网站http://www.sdzkjf.cn咨询！

The working place of the mixer is usually the mixing station and construction site with heavy dust. Its air filter is particularly important, and its maintenance should be very careful, otherwise it will cause abnormal wear of the engine and reduce the service life of the engine. Therefore, regular inspection, maintenance and replacement should be carried out. Please visit our website for precautions http://www.sdzkjf.cn consulting service