The invention provides a faint yellow
refrigeration coating, and belongs to the technical field of passive
refrigeration. The
coating comprises the following components in percentage by
mass: 35-45% of
styrene-acrylic
emulsion, 3-5% of a purple photoluminescent
pigment, 12-18% of other photoluminescent pigments, 25-30% of
titanium dioxide, 1-2% of yellow
pigment, 10-15% of water and 2-5% of auxiliaries. The surface temperature of the
refrigeration coating is lower than the ambient temperature under direct
sunlight. According to the refrigeration coating disclosed by the invention, a complementary color
photon compensation method and a fluorescent
photon compensation method are utilized, and the purple
photoluminescence pigment and the other yellow-green
photoluminescence pigments are added into yellow finish paint, so that the spectral
reflectivity of the coating in a solar spectrum
ultraviolet region and a visible light region is improved. Meanwhile, the
titanium dioxide is added, and the hyperspectral
reflectivity of the coating in a near-
infrared region is maintained, so that the total effective solar
reflectivity of the surface of the coating is greater than 0.95, and the total
infrared radiance is greater than 0.92, so that the lowest requirement of a passive refrigeration technology that the surface temperature is lower than the
ambient air temperature under direct
sunlight irradiation on the condition that the total solar reflectivity of the surface is not lower than 0.94 is fully met.