Is the so-called silent modern radiator fan really no sound?
Some products that are close to our lives or close to people, have a very high demand for the sound of modern radiator fans. They require quietness, no sound, and no sound.
The so-called mute, just said that the sound is relatively quiet, our industry refers to the mute below 25DB, the cooling modern radiator fan is 1 meter away from the device for testing noise.
In addition, the so-called noise here refers to the wind noise when the modern radiator fan is running, not the noise, the noise is called abnormal sound, it is not normal.
There are many products that require modern radiator fans to have waterproof and dustproof functions, such as humidifiers, refrigerators, toilets, bathroom products, outdoor products, industrial equipment, etc. What is the function of IP55 waterproof function, what do these two 5s represent?
The degree of protection is based on the IP × × grade standard recommended by the International Electrotechnical Commission (IEC). The installation level is different for different installation sites. Specifically, it can be selected by referring to the following description. In the grading standard, “××” is a two-digit number, the first position indicates the degree of protection against solids, and the second position indicates the degree of protection against liquids. The solid protection grade has 7 grades, which are represented by 0-6 respectively; the liquid protection grade has 9 grades, which are represented by 0-8 respectively.
0: no protection
1: Prevent large solid intrusion
2: Prevent medium-sized solids from invading
3: Prevent small solids from entering the intrusion
4: Prevent solid objects larger than 1mm from entering
5: Prevent harmful dust accumulation
6 : Completely prevent dust from entering
0: no protection
1 : Drops of water dripping into the casing have no effect
2: When the outer casing is tilted to 15 degrees, the water drops drip into the outer casing without affecting
3: Water or rain has no effect from the 60 degree corner to the outer casing
4: The liquid is splashed from any direction to the outer casing without damage
5: Rinse with water without any damage
6 : Can be used in the cabin environment
7 : Resistant to water (1m) in a short time
8 : Soaking water for a long time under a certain pressure