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Direct Expansion System
- The world’s smallest cooling system
- Mini rotary compressor boost peak performance
- +/-0.5℃ temperature control, high precision
- No liquid pump,no reservoir, maintenannce-free
- High heat flux for mobile and portable refrigeration
Direct Expansion System
DC-Powered Direct Refrigeration, the World's Smallest Cooling Systems
Direct Expansion systems are designed to satisfy the growing market that wants the vapor-compression refrigeration cycle, to meet their compact device’s direct refrigerant cooling requirement. It is known as Direct Refrigerant cooling or Refrigerant circulating systems or DC condensing units.
The main components of the dc refrigeration system is a miniature rotary compressor, condenser, expansion valve(capillary), driver board, filter drier, and other refrigeration parts. The mini dc compressor is the heart of the system.
Driven by the micro refrigeration compressor, the refrigerant flows directly through the cold plate(acting as an evaporator) with circulation. The advantages are substantial. it eliminates the use of secondary coolant, instead, the refrigerant absorbs heat directly at the heat source through a contact heat exchanger(cold plate).
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Miniature, Powerful Direct Expansion System (DX System)
The Rugged & Efficient Battery-Driven DC Condensing Unit
12V DX System
- Model:MCS01910
- Refrigerant: R134a
- Current Range: 1~9A(Max 10A)
- Weight: 1.8kgs(3.96lbs)
- Capacity: 300W(1,023Btu)
- Temperature Range: ±20℃ (-4~68℉)
- Drive Board Speeds: 2000 ~ 4500rpm
Size: 180x170x126mm
- Core Parts: 12V rotary mini compressor, condenser, capillary
- Features: Easily integrate into a system and provide very high heat flux at the heat source
24V DX System
- Model:MCS01920-L
- Refrigerant: R134a
- Current Range: 1~7A(Max 8.5A)
- Weight: 2.3kgs(5.06lbs)
- Capacity:115W (LMP)
- Temperature Range: ±20℃ (-4~68℉)
- Drive Board Speeds: 2000 ~ 4500rpm
- Size: 320x110x200mm
- Core Parts: 24V rotary mini compressor, condenser, capillary
- Features: Optimal thermal solution unlocks peak performance of mobile and portable refrigeration
24V DX System (3.2cc)
- Model:MCS03220
- Refrigerant: R134a
- Current Range: 1~7A(Max 7.5A)
- Weight: 3.0kgs(6.6lbs)
- Capacity:550W(1,876Btu)
- Temperature Range: ±20℃ (-4~68℉)
- Drive Board Speeds: 2000 ~ 4500rpm
- Size: 250x160x170mm
- Core Parts: 24V rotary mini compressor, condenser, capillary
- Features: Powered by direct current power supply where vehicle, battery, grid, or solar power is available
Direct Expansion System Advantages
Active Thermal Management for high heat flux applications
Smallest Footprint
Easy to integrate into the user’s system and save on floor space
High Reliability
Problem-free operation, fewer service calls
High Efficiency
Highest heat transfer rate, Low power draw, less heat rejection
Low Weight
Integrated unit weighs only 2.5kgs, extremely portable
Low Noise
Working oise < 40dB, superbly silent operation
Low Cost
Simplified configuration, minimum power consumption
Direct Expansion System Features
The direct refrigeration unit does not use a secondary coolant, instead the refrigerant flows directly through the cold plate with the circulation being driven by the miniature compressor, minimizing part count and maximizing thermal efficiency
- No reservoir
- No liquid pump
- No user maintenance
- No plastic tubing or fitting
- Factory-sealed cooling loop
- Cooling capacity 40% greater than a water chiller
DX System Typical Applications
Due to their compact size, low weight, and reliability, theRefrigerant circulating systems are ideally suited for mobile or portable chilled applications
- Boxes cooler
- Battery Cooling
- Laboratory Equipment
- Medical Laser Cooling
- Electronics Instruments
- PCs and Servers Cooling
- Mini Refrigerator/Freezer
- RV & Marine Air Conditioners
Refrigerant Circulating Systems
In the direct expansion unit, there is no need for a liquid pump, water tank, associated tubing, and connector and tubing- sources of failure and leaks. The DX cooling system only needs a minimal parts. This method minimizes the size and component count of the system and maximizes the highest efficiency and capacity.
Compared to commercial liquid coolers, MOIR’s direct expansion evaporator system is as much as 20 times smaller and 20 times lighter. The cooling capacity for direct expansion cooling is 45% greater than that of a liquid cooler.
Due to the elimination of the liquid pump and the secondary coolant loop, the compact dc condensing unit is greatly improving reliability with a long lifetime exceeding 90,000 hours.
Direct Expansion Cooling Applications
Due to the elimination of the liquid pump and the secondary liquid loop, the dx cooling unit minimizes its size and components that providing much smaller, lighter and higher reliable characteristics. Compared to the normal commercial water chillers, the direct expansion cooling installation work becomes easier and saves cost of the entire system for the users. It greatly simplifies the configuration of the cooling system and provides the highest efficiency. Nowadays direct refrigerant cooling units have been growing rapidly and are used across a wide range of applications because of their simplicity, reliability and low comsumption. For example, mini-freezer, precise instruments, lasers, medical, commercial and other active thermal solutions, where the cold plate is mounte on it directly.
- Wine beverage cooling
- Food cooler
- Portable refrigerator
- RV & Camping air conditioner
- Vehicle box cooler
- Medical imaging cooling
- Mini fridge
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