1, blue is a mild and fresh color, which brings people a cool feeling, which is consistent with the original design purpose of air conditioning fans, that is, the air blown by fans makes people feel cool and comfortable.

2. Blue is a color that helps to reduce the indoor temperature visually. This is because blue has a short wavelength in the spectrum, which can effectively absorb heat and convert it into other forms of energy, thus achieving a certain cooling effect.

3. Blue ice crystals also have psychological effects, which can make people feel relaxed and calm, thus making it easier for people to enter a comfortable state. This is also in line with the use of air-conditioning fans, which are often used in offices, study rooms, living rooms and other places that need to concentrate and relax.