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Ю case size: 25 * 25 * 10 mm
Ю bearing structure: B: BALL (BALL bearings)
Ю Ж electric pressure: 5 v ~ 12 v and 24 v ~ 48 v 60 ~ 110 v
Ю electricity flow: 0.15 (Amp)
Ю work rate: 0.75 (W)
Turn Ю speed: 12000 (RPM)
Ю wind quantity: 1.8 (CFM)
Ю static pressure: 3.76 (mmH20)
Ю noise sound: 20 (dB - A)
Special dc small fan manufacture as follows:
1, open mold manufacturing: mould manufacturing dc small fan is mainly based on customer requirements, for customers to customizing suitable fan such as (size, performance parameters, design, installation, positioning, selection of material and suitable for the environment, the cooling effect, lifespan, etc.)
2, to be customized: we undertake customer existing fan, fan samples, customized to sample the same fan, fan.
3, waterproof, waterproof grade a IP55, IP65, IP66, IP67, IP68 for user to choose from, the user can choose suitable waterproof level according to the environment.
4, moistureproof, can make ordinary moistureproof and high moisture.
5, fire prevention, adopt new fire prevention materials, meet the national fire protection standards.3. The wind noise, the flow of air between blunt talk to each other, with the surrounding objects, friction, and the separation of blade for air, periodic supply air pulse power, etc., will produce noise. The faster the air velocity, turbulence, the more often wind noise is bigger, and will increase with the increase of wind speed in acceleration. Common in axial flow fan blades and the space between the casing outside the joints of the flyback airflow, produce a wind noise at the same time, more can cause adverse effect to air volume, is therefore a flange, side in the wind, and so on to improve design.
Noise is the main influence is reflected in the user's physical and mental health and safety, accompanied with noise and vibration may lead to wear and interface chip loose platter, scratches and so on the phenomenon of using threatening.
Work should focus on when choosing a fan fan noise, for nature is as small as possible. But manufacturers in product parameters provided by the noise data, often have a certain gap with the actual use of the effect, not directly with the accurate, this is mainly due to the industrial standard test methods and practical use environment there is a difference.
1. First, the background noise of daily life is much higher than in the quiet room 15 dba background noise. General city, residential area near the traffic trunk road, background noise in the middle of the night between 30 ~ 35 dba, whereas daytime in 40 ~ 50 dba.
2. Second, quiet interior wall material with sound-absorbing, sound insulation effect, Yu Jinfeng side measurement cannot reflect the fan sends out the sound pressure of airflow, and the actual use of the user is unable to avoid.
3. Moreover, the fan working alone and install to work on the radiator noise difference is huge. Experienced users know: air cooled radiator high-speed most of the noise from air flow through the radiator fins were produced by the wind noise and rubs, the fan itself accounts for only small part of noise. Most of the radiator along with noise also is only the fan noise working alone, rather than the whole work noise, the manufacturer does not specify a little misleading.
4. In addition, the distance between the user and the radiator fan in practical use are generally within 1 m, if we consider the case of sound insulation effect, the echo of the small room, particular case is difficult to determine. Of course, this is a test of any "standardised" cannot solve the problem, users can only suggest to reduce the noise damage does not affect to use at the same time try to widen and the distance between the noise source, choose sound insulation effect better case, when the room is decorated with sound-absorbing materials.
Therefore, in order to more close to the user in the actual use of state, uphold the principle of the OCER.net always deep, strict, we are air cooled radiator test, concluded a set of noise test standard:
6, temperature control: can be made
