Choosing the right fan or blower

Choosing the right fan or blower:

Many devices with electronic components deliver more power and have ever higher packing densities. Convection cooling is the most widely used solution, and the most cost-effective method, using air as a medium to dissipate heat by means of forced air movement. The increase of heat generation of convection cooling requires more powerful compact fans but also need to be quiet and request a low power consumption.

To meet these requirements, Dynetics supplies innovative fans.

In the design phase, to avoid quality issues, thermal management should already be considered an important part of the result of the application and could lead to a shorter product life. Unwanted heat can be effectively controlled by air movement by means of axial-, radial-, crossflow-, or centrifugal fans. Each version of fan has proven its efficiency in use through many years, and the effectiveness has been continuously improved. Choosing the right fan as a cooling solution depends on several factors.

Some important topics to consider are:

1.    Supply voltage (AC or DC) 

2.    Air performance (static pressure; Airflow; volume of air to cool the area), yields the desired velocity 

3.    Sound level 

4.    Bearing type (sleeve- or ball bearing) 

5.    Available space: solved by axial-, radial-, centrifugal-, crossflow-fans

6.    Desired integrated options: like ingress protection against dust, water, salt spray, etc. speed control, cable assemblies, etc. 

Dynetics, with offices in Germany and the Netherlands, supports developers in selecting the most suitable product for their mechatronic task. For unit cooling without compromise, we have a wide range of axial-, radial, crossflow and centrifugal fans from leading manufacturers. All fans are designed to meet the UL, CSA, TUV, CE & CUL requirements. The fans are produced by a quality assurance process, meeting REACH, RoHS conditions and received a final inspection before delivery to customers, 

At the upcoming PCIM trade fair, Dynetics will once again present its mechatronic products with Focus on its fans and blowers. Below we list some examples: 

Quiet and energy-saving fans for effective cooling or ventilation:

Ultra-reliable fans operate for 80,000 to 100,000 hours at a temperature between 20 and 40°C

The efficiency of the fan and the lifespan are decisive in your selection.

With the increases of speed, the motor temperature will increase, that will be transferred to his bearings. The ball-bearing based fans have a reduced friction, resulting in reliable and durable fans with an extended lifespan and noise reduction. Our fans feature high efficiency like a low motor loss to keep the bearing temperature low, ensuring a long service life. The performance characteristics include, for example, the L10 curves of selected fans, the service life of 100,000 hours at 20°C and 60,000 hours at 40°C. The basic indication of life expectancy can be found in the following graphs.

The F10 curve represents life expectancy based on a survival rate of 90%. Dynetics will provide the MTTF (Mean Time to Failure) data upon request. 

In case of a cost-effective choice, we also offer fans based on sleeve bearing but with a shorter lifespan between 30,000 and 40,000 hours.

Additional integrated options and special functions: 

Our fans and blowers are optionally available with additional built-in features and intelligence. All models can be supplied with signal outputs for speed, threshold and blocking. We also manufacture custom solutions with modified electronics and signal input for speed control.

Stepless speed control:

via the output of a separate wire through PWM (pulse width modulation) signal control, which also leads to a further reduction in power consumption and noise levels.

Predictive maintenance:

A signal is generated when the speed of the fan motor drops, allowing for predictive and preventive maintenance, and resulting in higher equipment availability.

Optimal fans in harsh/humid applications: 

Dynetics can customize the different fan models for operation in harsh environments as waterproof or with high moisture resistant protective coatings. This makes the fans ideal for environments with high humidity, a lot of dust or salt spray, and waterproof (such as IP68), with a reduction in bearing temperature rise, etc.

Customized solutions can be developed, including cable assemblies,

centrifugal fan

A centrifugal fan or blower is often used as a fan to create targeted airflow on the spot. and ideal for space-constrained applications. It provides reliable airflow performance while maximizing a compact system design.

Example 1: (new) Waterproof blower (DC09733024S1100H) 

The compact blower has dimensions of 97 x 95 x 33mm and has an output of 1.85 m3/min; 1950.35Pa, with only 69dBA, and available in 12-, 24, or 48V/DC and weighs 200g

We have been able to successfully use the blower from the DC09733 series in a harsh environment with high humidity.

The fans are RoHs tested, available in different power classes and with supply Voltages 12V; 24V; or 48V/DC and with various options.

For more details we invite you to visit our website (click on DC09733024S1100H for direct access) 

Example 2: a compact centrifugal fan:

New: DS12728024H0000A

Our new 120mm DC blower features an ultra-slim 28mm design 

A 24V/DC centrifugal fan with dimensions Ǿ120x28mm and metal base plate; Power requirement 0.85A; Air Flow Rate 51.0CFM; 3.30inch H2O; 64.5dB

Highly efficient Axial fans for space-saving solutions:

The units to be cooled continues to get more compact. The efficient cooling of such units requires high-quality fans with either high static pressure or compact and super-quiet multi-blade blowers.

Example 3: NEW D1225R Series:

A new cost-effective axial fan without sacrificing quality or reliability.

The D1225R is a space-saving axial fan and available in 12- or 24V/DC. This ball-bearing axial fan has a unique design that not only optimizes the shape of the impellers, but also the use of a 3-phase BLDC motor, with integrated rubber damping and a new driver IC.

As a result, the D1225R range has outstanding features, including a 5dB lower noise level and air performance at a depth of just 25mm, with performance currently only found in fans with a depth of 32mm. The 7mm saved allows the designer to reduce the drag of the entire unit, increasing the flow rate and improving cooling efficiency. This newly developed high-efficiency motor, together with a new, customer-specific driver IC, resulted in energy savings of approximately 30%.

 Summary of the optimization:

1.    Wider quiet operating range (50% increase)

2.    Significant vibration reduction.

3.    Energy efficiency (30% savings)

4.    The new design improves the sound quality.

5.    Available with integrated speedometer or blocking sensor 

6.    Dust protection and waterproof (up to IP68)

Examples of 25mm Compact Axial Fans:

New D1225R24BBAZ-00:

24V/DC axial fan with dimensions □120x25mm; Power requirement 0.58A; Air Output 150CFM; 0.6 inch H2O; 50dB; IP68

New: DS09225024M0001S

24V/DC axial fan with dimensions □92x25mm; Power Requirement 0.22A; Air capacity 75.6CFM; 0.35Inch-H2O; 48dB

axial fan

Example 4: New DS0923224H0011A:

axial fan with dimensions □92x32mm; Power Requirement 0.6A; Air Output 106.37CFM; 0.71-inch H2O; 51.9dB; IP67

High Static Pressure/High Airflow Fans:

Where the volume flow rate drops with conventional axial fans in the event of increased pressure loss in the device, the new G-series offers a solution.

The G Series Axial Fan with Pressure Chamber still maintains performance where a certain volume flow is required with high back pressure.

The integrated pressure chamber with stationary blades ensures that there is significantly more pressure and volume flow at the operating point and that the fans perform above average and is also suitable as an integrated protective grille.

In contrast to centrifugal fans, where the flow direction swirls centrifugally, the outgoing air flow flows effectively and straight to the bolt-on flange.   

The new G fan series shows that energy can be saved in this way.

The fans are available with dimensions of □92x38mm; □120x38mm; □134x38mm; and Φ172mm diameter; a performance that was previously only possible with much larger fans. The fans are based on 3-phase BLDC motors and have a PWM connector for stepless speed control with stop function. All models can be supplied with speedometer for speed, threshold value and blockage. Supply voltage is 12, 24 or 48 VDC.

Example 4.: New G0938C12BAZP (high static pressure/high airflow):

The axial fan in an aluminum housing (dimensions □92x38mm) needs a 12V/DC supply voltage and has a nominal current requirement of 1.8A.  Air output of nominal 640Pa (2.57 inchH2O); and 109CFM (3.1m3/min) and are supplied as standard with PWM speed connector and speedometer signal.

Also new is the DC09238024H11100 

We also have the series of axial fans with high static pressure/high airflow available in a plastic housing. Example is the DC09238024H11100 with dimensions of □92x38mm.

As a 24V/DC axial fan, the axial fan has an air performance of 474.64Pa (48.4 mmH2O) and 166.37CFM.

The axial fans are particularly suitable for cooling heavy industrial applications (e.g. Welding equipment, frequency controllers, UPS, Datacentre) and in the telecom sector. 

AC fans:

These fans were in the past based on shaded pole motors.
Thanks to modern electronics developments, many more efficient solutions are now available as EC fans.

EC stands for electronically commutated fans. Basically are this BLDC fans with an integrated power supply. Our EC fan range includes axial fans in sizes from 60x60x25mm to 205x205x72mm and Ǿ72mm. but also blower and backward curved radial fans.

Example 5.:  EC fan: DYE12038V2HBLD-YH3

axial fan 120x120x38mm; 220V/AC; The fan is RoHs compliant and CE approved

Our product specialists will be happy to advise you on the optimal choice.

Dynetics will be exhibiting at the upcoming PCIM trade fair in Nuremberg (9-11-06-2026) and has booth 9-132.

Further details can be found at:

http://www.dynetics.eu/products/fans-blowers/axial-fans/axial-fans-dc-types