A hydrophilic polymer coating was prepared and used to release the frost formation in a series of experiments. The frost surface temperature and frost thickness were measured on the coated surface and uncoated copper surface

respectively

and the results were compared. The experimental results show that the onset of the frost formation on the coated surface can be retarded about 5-55mins

even over 3 hours in some certain conditions below the freezing point. Moreover

the frost thickness greatly reduces by 40%. Furthermore

the frost layer deposited on the coated surface is looser than that on the uncoated surfaces and thus can be removed by external force more easily. The effects of the polymer coating thickness on frost formation was studied and it is found that under ordinary conditions the effectiveness of frost suppression of the polymer coatings increases with the coating thickness due to the increased ability to absorb water.