Prepn process of hydrophilic paint for superthin air conditioner aluminium foil heat exchanger

Abstract

The present invention discloses preparation process of hydrophilic paint for heat exchanger aluminum foil of air conditioner. The paint consists of one kind of base paint, and one kind of top paint. The base paint consists of hydroxyl emulsion 15.0-20.0 wt%, amino resin 1.5-3.0 wt%, cross-linking assistant 0.05-0.5 wt%, color paste 1.5-2.5 wt%, and mixed solvent for the rest. The top paint includes two components, component A and component B, in the weight ratio of 9.0-11.0 to 1, the component A consists of hydrophilic polymer 25.0-35.0 wt%, hydrophilic reinforcer 5.0-10.0 wt%, surfactant 0.5-3.5 wt%, and mixed solvent for the rest; and the component B consists of curing agent 60.0-65.0 wt% and deionized water 35.0-40.0 wt%. The paint of the present invention has high adhesion, high hydrophilicity, and capacity of forming very thin coating to ensure the heat exchange performance of the heat exchanger.

Description

Technical field:

[0001] The invention relates to a method for preparing a coating, in particular to a method for preparing a hydrophilic coating for an ultra-thin air-conditioning aluminum foil heat exchanger. Background technique:

[0002] When the air conditioner is cooling, the water vapor in the air condenses and adheres to the fin surface of the air conditioner's aluminum foil heat exchanger. On the one hand, the attached condensed water tends to form a water bridge between the fins, which increases the ventilation resistance and noise when the air conditioner is running. The efficiency of the heat exchanger is reduced. On the other hand, when condensed water adheres to the fins for a long time, it will absorb dirt in the air and cause corrosion reactions on the surface of the fins, which will also reduce the working efficiency of the heat exchanger. The reaction produces a major component of Al 2 o 3 ·3H 2 O white powder, and blown out with the warm wind, polluting...