Modulation Technologies
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Modulation Technologies  

The Copeland Scroll Digital™ compressor utilizes axial scroll compliance to achieve modulation by forcing the scrolls to separate, causing compression of the refrigerant to stop without stopping the compressor motor. In this “unloaded” state, the compressor output is zero capacity and consumes less than 10% consumption. When the scrolls are engaged in the “loaded” state, compressor output is 100% capacity. The scrolls are separated in a periodic cycle (15 seconds) to obtain a time-averaged compressor capacity based on the ratio of loading and unloading times. This allows the compressor to achieve infinite capacity modulation between 10% and 100%.

Advantages

  • Modulation Capability: Most precise capacity matching capability provides continuous modulation between 10% and 100% capacity, the widest available capacity modulation range available.
  • Electromagnetic Interference Issues: Negligible, since no motor frequency variation is needed.
  • Oil Management Issues: Negligible, since compressor motor runs at constant speed.
  • Efficiency: High system efficiency is obtained by matching capacity with cooling/heating demand.
  • Temperature Control: Precise and smooth control is achieved, limiting any fluctuations in setpoint.
  • Humidity Control: Precise and smooth control is achieved, limiting any fluctuations in setpoint.