There are many products require cooling fan with waterproof and dustproof features, such as humidifiers, refrigerators, toilets, bathroom products, outdoor products, industrial equipment, such as IP55 waterproof function is what function, the two 5 in the end on behalf of what?
Degree of protection using the International Electrotechnical Commission (IEC) recommended IP × × level standards, different installation sites, the level is not the same. Specific reference to the following instructions selected. In the grade standard, "××" is a two-digit number, the first one indicates the degree of protection of the solid, the second one indicates the degree of protection of the liquid. There are seven levels of solid protection rating, said with 0-6; liquid protection level has nine levels, with 0-8, respectively.
Dust level
0: No protection
1: Prevent large solids intrusion
2: Prevent medium size solid intrusion
3: prevent small solids from entering
4: to prevent objects greater than 1mm into the solid
5: prevent the accumulation of harmful dust
6: completely prevent dust from entering
waterproof level
0: No protection
1: dripping into the shell no effect
2: When the shell is tilted to 15 degrees, dripping into the shell no effect
3: Water or rain from the 60-degree angle to the shell no effect
4: The liquid splashed into the shell from any direction without damage
5: rinse with water without any harm
6: Can be used in the cabin environment
7: can withstand water immersion in a short time (1m)
