This series of compressors builds upon the inherent advantages of scroll technology—high efficiency and quiet operation—and through optimized design, achieves higher power density and a broader application range, making it an ideal choice for medium-sized commercial refrigeration systems. I. Core Advantages1. Outstanding Energy Efficiency, Lower Total Cost of Ownership
Leading Scroll Technology: Danfoss scroll compressors utilize optimized scroll profiles and precision manufacturing processes to minimize internal leakage and gas backflow, achieving exceptionally high volumetric and isentropic efficiency. This translates to lower energy consumption for the same cooling capacity, directly saving users on electricity costs.
Excellent Part-Load Performance: Compressors operate at part-load conditions most of the time. The design of Danfoss compressors, especially when paired with variable speed drives, maintains a high Integrated Part Load Value (IPLV), significantly reducing annual overall operating costs.
Low Starting Current: Scroll compressors start smoothly, causing far less electrical grid impact compared to piston compressors. This helps protect electrical systems and may reduce demand charges.
2. Unmatched Reliability and Durability
Robust Mechanical Construction: The core scrolls are made from high-strength special steel or cast iron, treated with special surface coatings for extreme wear resistance and anti-fatigue strength, ensuring long compressor life.
Superior Motor Protection: Built-in intelligent protection modules (such as PTC thermistors and electronic protection modules) continuously monitor motor temperature, current, and voltage, effectively preventing motor burnout caused by phase loss, voltage instability, overload, liquid slugging, and other abnormal conditions.
Efficient Motor Cooling Technology: Optimized refrigerant injection and flow path design ensure the motor is adequately cooled even under high ambient conditions, maintaining stable operation.
Robust Lubrication System: Utilizing patented technologies like centrifugal oil supply, it ensures critical moving parts (bearings, scrolls) are adequately lubricated even under extreme operating conditions. The high-efficiency oil separator minimizes oil discharge, maintaining system heat exchange efficiency.
3. Exceptional Quietness and Low Vibration The motion of a scroll compressor is continuous and linear, in stark contrast to the sharp reciprocating motion of piston compressors. This inherent advantage allows Danfoss scroll compressors to operate with exceptional smoothness, resulting in very low noise and vibration levels. II. Series Model Parameter Comparison
Model
Displacement Code
Theoretical Displacement (m³/h)
Approx. Refrigeration Capacity*
Positioning within the Series
MLM045T4LC9
045
~ 14.0
~ 4.5 Tons
Entry capacity, for small-medium systems
MLM048T4LC9
048
~ 14.8
~ 4.8 Tons
Primary model for small capacity
MLM058T4LC9
058
~ 18.2
~ 5.8 Tons
Primary model for medium capacity, most widely applicable
MLM066T4LC9
066
~ 20.7
~ 6.6 Tons
Medium-high capacity, strong performance
MLM076T4LC9
076
~ 23.8
~ 7.6 Tons
Large capacity model within the series
*Note: Approximate refrigeration capacity is an estimate based on medium-temperature conditions (e.g., evaporation temperature -10°C) using refrigerants like R134a or R513A. For reference only.III. Typical Application Scenarios Leveraging their efficiency, compact size, and reliability, this series is widely used in:
Commercial Refrigeration: Centralized refrigeration systems for medium-sized supermarkets, cold storage warehouses, and refrigeration stages in food processing centers.
HVAC: Air-cooled chillers for buildings, heat recovery systems.
District Heating & Heat Pumps: Heat pump systems for medium-sized commercial buildings or district heating.
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