First of all, we can see the cleanliness test process of ventilation duct after cleaning. First, we should clean the surface dust volume of ventilation duct of central air-conditioning ventilation system. These samples should be cleaned within seven days after cleaning the ventilation duct. After cleaning, the main air ducts such as supply duct, return duct and fresh duct of each set of central air conditioning ventilation duct are determined, and at least five representative sampling points are selected. The sample material is dried in a 105C thermostat for 2 hours, then cooled in a dryer for 4 hours, or stored in a dryer for 24 hours. The initial weight was measured with a balance in a sealed bag. Determine the sampling area of the sampling position of the ventilation duct and remove all residual dust on the wall of the inner duct.
Another is to grasp the steps of ventilation pipe pollution detection: first, before cleaning the surface area of air duct of central air conditioning ventilation system. At least five representative sampling points (such as fresh air, supply air and return air duct) are selected for determination and testing in the ventilation ducts of each central air conditioning and ventilation system. If sampling is not possible in the main ventilation duct, no less than five sampling points can be extracted. When sampling the main ventilation pipe, open the maintenance hole, cleaning hole or site hole. Remove the tuyere from the supply tuyere when sampling. The dust on the surface of the air duct should be collected when sampling, and the air duct should be removed intact in the prescribed area.
Now, with the development of the city, more and more high-rise buildings appear in every city, especially in this city, more and more high-rise buildings, we can see high-rise buildings everywhere on the street, and most of these high-rise buildings are equipped with air conditioning. In fact, the air in these high-rise buildings is transported through ventilation ducts. With people's pursuit of health and the improvement of air quality requirements, the importance of air conditioning ventilation duct cleaning will gradually increase.
So in the cleaning industry, the ventilation duct cleaning industry, with the improvement of awareness, will have a good development, in the next five to 10 years is also a development peak, but you also have to see that because of the complexity of the building ventilation system, it is difficult to clean, so the needs of enterprises and institutions have this order, in the selection of ventilation duct cleaning. Enterprises should also choose some more formal shops, so as to achieve the above quality and effect.