Project: Telecom & Components Thermal Management
Cooling Approach: Air-cooled
Cooling Approach: The Hong Kong customer (Climax Telecom Limited) needs a compact cooling solution for a sealed telecom cabinet (0.2 m³) with 400W heat load in a 55°C ambient environment. Their goal is to reduce internal temperatures to 10°C. They aim to enhance the cooling capacity of the Micro Aircon DV2830E-AC model, without altering its dimensions, and are open to exploring alternative models. RIGID offers a custom Micro DC Aircon meeting these requirements, supporting the customer’s mission to enhance operational efficiency with innovative automation solutions.
Recommended products: Micro DC Aircon, DV3830E-AC

Get A Sample Online

---

Project Background –

Telecom Component Cooling in High Temperature

A Hong Kong-based telecom systems company approached RIGID with a critical cooling requirement for one of its latest infrastructure projects. The challenge involved maintaining a stable and safe operating temperature within a sealed outdoor cabinet measuring 0.2 cubic meters. This cabinet houses sensitive electronic equipment that generates up to 400W of heat, and it operates in a harsh ambient environment of 55°C. The existing cooling solution caused internal temperatures to exceed 60°C, far above the acceptable limit. The customer’s target is to bring the internal cabinet temperature down to 10°C to ensure system reliability and prevent overheating.

To address this need, the customer selected RIGID’s Micro DC Aircon – Model DV3830E-AC, a compact and energy-efficient cooling unit specially designed for outdoor telecom applications. The Micro DC Aircon features direct active air cooling, which provides highly efficient thermal management in confined spaces. Operating on 48V DC power, it ensures reliable performance even during power outages, thanks to built-in free cooling backup capability.

 

Solution

3.8cc Micro DC Aircon

How Micro DC Aircon Works in Telecom System

RIGID’s Micro DC Aircon is a compact, energy-efficient air-cooling system engineered to protect sensitive telecom electronics from overheating, particularly in sealed outdoor cabinets exposed to high ambient temperatures.

Here’s how it works in the system:

1. Heat Monitoring
   Electronic components inside the sealed cabinet generate heat during operation. A built-in temperature sensor monitors the internal air temperature in real time.

2. Cooling Activation
   When the temperature exceeds the set threshold, the Micro DC Aircon automatically activates. The system uses a capillary tube expansion device, enabling a reliable and compact refrigeration cycle driven by a miniature BLDC rotary compressor, operating on 48V DC power.

3. Refrigeration Cycle

   • The evaporator coil located inside the cabinet absorbs heat from the internal air.

   • The refrigerant evaporates, carrying the heat away.

   • The compressor compresses the refrigerant vapor and sends it to the condenser, where heat is released to the outside.

   • The cooled refrigerant returns through the capillary tube, and the cycle repeats.

4. Air Circulation
   Cool air is distributed evenly within the cabinet through side air ports, ensuring stable operation of the electronic equipment.

5. Energy Efficiency & Backup Power
   The unit’s DC-powered design minimizes energy consumption and is ideal for solar-powered or battery-supported systems. In case of a power outage or when deployed in remote, off-grid locations, the unit can continue operating on battery power, ensuring uninterrupted protection.

Key Features for Telecom Applications

 

1. Compact & Lightweight Design
   Ideal for space-constrained sealed cabinets and outdoor enclosures.

2. 48V DC Power Supply
   Compatible with telecom backup systems and off-grid solar or battery setups.

3. Energy Efficient Operation
   BLDC compressor and optimized airflow ensure low power consumption.

4. Capillary Tube Expansion System
   Reliable, maintenance-free cooling with a compact and efficient design.

5. Active Air Cooling
   Direct cooling of internal cabinet air to maintain optimal operating temperatures.

6. High Ambient Temperature Performance
   Operates effectively in environments up to 55°C, ensuring equipment safety.

7. Quiet Operation
   Low noise levels support use in urban or noise-sensitive telecom sites.

8. Built-in Temperature Control
   Automatic start/stop based on cabinet temperature settings for reliable operation.

9. Side Air Ports Design
   Flexible installation with directional airflow for better thermal management.

10. Battery Backup Compatible
    Continues to operate on DC battery power during grid outages or remote use.

11. Optional R290 Refrigerant Compatibility
    Environmentally friendly and compliant with green initiatives.

12. Isolated Evaporator Design
    Prevents cross-contamination and improves thermal isolation within the cabinet.

 

Benefits for Telecom Cooling

 

1. Stable Internal Temperature Control
   Efficiently lowers cabinet temperature from over 60°C to the target 50°C, ensuring reliable equipment performance and preventing heat-related failures.

2. Compact & Space-Saving
   The micro-sized unit fits perfectly in the limited space of a sealed 0.2 m³ cabinet without requiring design modifications.

3. High Performance in Harsh Conditions
   Operates effectively in extreme ambient temperatures up to 55°C, making it ideal for outdoor telecom environments in Hong Kong.

4. Energy Efficiency
   Low power consumption thanks to the 48V DC compressor and capillary tube design reduces operating costs.

5. Backup Power Compatibility
   Can run on battery power in case of power outages or in off-grid installations, ensuring uninterrupted cooling and system safety.

6. Quiet Operation
   Noise-optimized design supports use in urban or noise-sensitive locations without disturbing nearby residents.

7. Custom Upgrade Options
   Offers the flexibility to enhance cooling capacity in future models without changing physical dimensions, supporting scalability for upcoming projects.

8. Trusted Performance
   Proven reliability based on prior orders and positive feedback gives confidence in continued use and further investment.

 

RIGID’s Micro DC Aircon 

RIGID’s Micro DC Aircon is a compact, energy-efficient cooling solution designed for sealed cabinets and telecom systems.

Powered by 48V DC, it features a BLDC rotary compressor, capillary tube, and integrated evaporator and condenser coils. Operating efficiently in ambient temperatures up to 55°C, it delivers reliable cooling for heat-sensitive electronics.

Key benefits include quiet operation, low power consumption, battery backup compatibility, and environmentally friendly refrigerant options like R290.

Its space-saving design, side air ports, and high cooling performance make it ideal for remote or off-grid locations, ensuring stable thermal control and uninterrupted operation in harsh environments.

RIGID R&D Team

RIGID’s R&D team is a dynamic group of engineers and innovators specializing in compact cooling technologies. With deep expertise in refrigeration, thermodynamics, and electronics, the team drives product innovation, customization, and performance optimization. Focused on precision, reliability, and energy efficiency, RIGID’s R&D team delivers cutting-edge thermal solutions tailored to demanding applications in telecom, medical, aerospace, and industrial sectors.