The hydrophilic coating treatment process of automobile evaporator and its enhancement effect on condensate discharge and mildew resistance

The hydrophilic coating treatment process of automobile evaporator is one of the important technologies of modern automobile air conditioning system, which has a significant enhancement effect on condensate discharge and mildew resistance.During the operation of the evaporator, the surface temperature is much lower than the dew point of the air, and the water vapor in the air will continue to condense into water droplets.If the surface of the evaporator is not treated with hydrophilic water, the condensate will attach to the fins and pipe walls in the form of water droplets, forming a water bridge to block the air passage, increasing the air flow resistance and reducing the heat transfer efficiency.In severe cases, the accumulated condensate may also be brought into the air duct by the air flow and blown out from the air outlet, causing discomfort to the occupants.

The hydrophilic coating forms a layer of film with good hydrophilicity on the surface of the evaporator, so that the condensate can quickly spread into a uniform water film, flow down along the surface of the fins, and finally gather into the catchment plate and discharge through the drain pipe.This water film flow method avoids the formation of water droplets and the clogging of the water bridge, ensures the smooth flow of the air passage, and maintains the efficient heat transfer performance of the evaporator.The hydrophilic coating is usually composed of a hydrophilic resin and a crosslinking agent. It is cured at high temperature after impregnation or spraying. It has good adhesion and durability, and can maintain the hydrophilic effect throughout the service life of the evaporator.

In addition to promoting the discharge of condensate, the hydrophilic coating also makes a positive contribution to the mildew resistance of the evaporator.The evaporator is in a humid environment for a long time. If organic dirt accumulates on the surface, it is easy to breed mold and bacteria, produce odors, and affect the air quality in the car.The hydrophilic coating makes the surface smoother, and the dirt is not easy to attach, even if there is a small amount of dirt, it is easy to be washed away by the condensate.Some hydrophilic coating formulas also add antibacterial ingredients, which can further inhibit the growth of microorganisms and reduce odor production.Through the continuous improvement and optimization of the hydrophilic coating process, Hyundai automobile evaporators can maintain high-efficiency heat transfer while maintaining long-term cleanliness and hygiene, providing a healthy and comfortable air environment for passengers in the car.