Disclosed is a refrigerant circuit which comprises a compressor, a water heat exchanger, a receiver, an expansion valve, and an evaporator. For this reason, as the number of points that express the device color gamut increases, a mapping destination search requires longer time. The caller is thus unaware or uncertain that they have been blocked. The natural pigment compositions which are useful for coloring of food products and pharmaceuticals do not migrate in the products and they are acid stable.