because the return air filter of the air conditioning unit cannot be cleaned and changed in real time, the surface cooler, condensate dish, condensate pipe of the air conditioning unit and the black greasy pollutants attached to the return and air outlet are the most direct source of infection of air pollution.

The surface cooler USES the refrigerant to absorb heat in the surface cooler so that the temperature of the cooled space gradually decreases. Divided into snake coil type and cold air type. The performance of the fan-coil heat exchanger determines the capacity of the fan-coil to convey cold (heat) and the effect on the air volume. Air cooled finned condenser in an air conditioning unit. The aluminum fins of the surface cooler in the air conditioner adopt the shape of double flanged Windows to ensure the perturbation of air heat exchange and make it in the turbulent state, which greatly improves the heat exchange efficiency of the surface cooler. The surface cooler aluminum fins in the factory after a strict three-way cleaning process, metal cleaner, ultrasonic cleaning, rinsing water, to ensure that there is no residue on the fins, so that the air more smoothly flow, fundamentally ensure the reliability of heat transfer.

1. Due to the long-time operation of the air-conditioning chilled water pipe system, a layer of Ca2+, Mg2+, Fe2+ and other compounds are attached to the inner wall of the chilled water pipe, which reduces the cross-sectional area of pipeline water flow and adds system resistance, leading to the increase of load of the chilled water pump and even the water shortage at the end of the system.

2. Because the air conditioning and ventilation ducts operate for a long time, the inner wall of the ducts is attached with a layer of dust containing bacteria, legionella bacteria and viruses, which poses great risks to human body.

3, cooling tower packing, and cooling water pipe because of long time running, packing and cooling water pipe wall adhesion layer contains bacteria, viruses, legionella bacteria, algae, dirt, reduces the cross-section of pipe flow, add the system resistance, by cooling water pump load add cooling tower water supply ability is reduced, even affect the refrigerating unit refrigeration result, especially the pollution more and more severe situation open type cooling tower.