With the rapid growth of smart cities, commercial displays, and intelligent transportation systems, Outdoor Digital Signage is becoming increasingly widespread.

Modern digital signage systems are no longer simple display devices. They now integrate:

• High-brightness display modules
• Power supply systems
• Control boards
• Communication modules
• Network systems

and other high-power electronic components.

At the same time, the market is demanding:

• Thinner designs
• Higher brightness
• Lower noise
• Longer service life
• Reliable outdoor operation

As a result, thermal management has become one of the key factors affecting overall system reliability.

Why Is Cooling Becoming More Difficult for Outdoor Digital Signage?

Traditional digital signage systems had relatively spacious internal structures, where standard axial fans could provide sufficient airflow.

However, as equipment becomes thinner and more compact, several thermal challenges emerge:

Many systems perform well during laboratory testing, but after actual outdoor deployment, issues such as the following may occur:

• Local overheating
• Black screen failures
• Brightness reduction
• Fan stoppage
• Power supply protection shutdowns

In many cases, the root cause is that conventional cooling solutions are no longer suitable for high-impedance airflow paths.

Why Are Traditional Axial Fans Reaching Their Limits?

Many engineers still prioritize conventional axial fans during the early design phase.

Axial fans are characterized by:

• Large airflow volume
• Simple structure
• Lower cost

However, in ultra-thin digital signage systems, the limiting factor is often no longer airflow volume, but static pressure capability.

When the internal structure includes:

• Narrow airflow channels
• Complex exhaust paths
• Dense component layouts

standard axial fans may struggle to push air effectively through the system.

This can lead to:

• Heat accumulation
• Localized hot spots
• Reduced cooling efficiency

For high-resistance systems, static pressure becomes more important than airflow volume alone.

Why Are More Outdoor Displays Switching to Centrifugal Fans?

To address slim and high-resistance structures, many manufacturers are adopting:

Splash Proof Centrifugal Fans

Compared with traditional axial fans, centrifugal fans use a 90-degree airflow structure, making them more suitable for:

• Narrow airflow paths
• Long-distance air delivery
• High-density systems
• High static pressure applications

In high-impedance environments, centrifugal fans can move air more effectively throughout the system.

As a result, they are increasingly used in:

• Outdoor digital signage
• EV charging stations
• Solar inverters
• Energy storage systems

and other industrial outdoor equipment.

Why Is Waterproof Performance Essential for Outdoor Digital Signage?

Digital signage systems are commonly installed in:

• Shopping mall exteriors
• Subway stations
• Bus stations
• Highway billboards
• Outdoor information terminals

These systems are continuously exposed to:

• Rain
• Humidity
• Condensation
• Dust
• High outdoor temperatures

Under such conditions, conventional fans may experience:

Therefore, IP protection rating has become a critical specification for outdoor cooling systems.

SANYO DENKI San Ace Splash Proof Centrifugal Fan Solution

For Outdoor Digital Signage applications, San Ace provides a Splash Proof Centrifugal Fan lineup designed to address:

• High static pressure cooling
• Outdoor waterproof protection
• Long service life
• Intelligent speed control

Core Advantages of the Solution

High Static Pressure Design

For slim digital signage systems, high static pressure performance is essential.

For example, the San Ace 9W2TM48P4G001 offers:

Its maximum static pressure reaches:

$708Pa$

making it highly suitable for thin, high-resistance airflow structures.

Waterproof and Dustproof Performance

San Ace Splash Proof Centrifugal Fans are available with:

IP68 models are particularly suitable for:

• Long-term outdoor operation
• High humidity environments
• Condensation-prone applications

including:

• Outdoor digital signage
• EV chargers
• Energy storage systems
• Solar power equipment

PWM Intelligent Speed Control

Digital signage systems often operate under varying loads:

• High brightness during daytime
• Lower brightness at night

As a result, full-speed fan operation is not always necessary.

San Ace Splash Proof Centrifugal Fans support PWM speed control, enabling automatic speed adjustment based on system temperature:

This helps achieve:

• Lower noise
• Reduced power consumption
• Longer fan lifespan

Recommended Models for Outdoor Digital Signage

Recommended for Ultra-Thin Structures
9W2TM48P4H001

Suitable for:

• Ultra-thin advertising displays
• Compact outdoor information terminals
• Narrow airflow systems

Recommended for Medium-Sized Digital Signage
9W2TN48P1H001

Suitable for:

• Medium and large outdoor displays
• Commercial display equipment
• High-brightness display systems

Value of the San Ace Cooling Solution

Compared with conventional cooling solutions:

Engineering Support from Jentech Electronics

As a comprehensive industrial cooling solution provider, Shenzhen Jentech Electronics Co., Ltd. provides:

Original San Ace Product Support

Including:

• Splash Proof Axial Fans
• Splash Proof Centrifugal Fans
• Splash Proof Blowers

Thermal Engineering Support

Including:

• Airflow path analysis
• Static pressure matching
• Airflow optimization
• Noise optimization
• PWM speed control recommendations

Customization Services

Supporting:

• Connector processing
• Customized cable lengths
• FG/RD/PWM signal customization
• Waterproof level customization
• Special mounting structure adaptation

 Conclusion

As Outdoor Digital Signage continues evolving toward:

• Slimmer structures
• Higher brightness
• Outdoor deployment
• Longer service life

traditional axial fan solutions are gradually reaching their thermal limits.

High static pressure, waterproof centrifugal fans with PWM control are becoming a key cooling solution for next-generation outdoor digital signage systems.

San Ace Splash Proof Centrifugal Fans are helping manufacturers achieve more stable, thinner, and more reliable outdoor cooling designs.

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SANYO San Ace IP54/IP56/IP68 Splash Proof Centrifugal Fan