Scroll Compressors
Copeland Scroll Compressors

When Emerson first pioneered the use of scroll technology in compressors, it changed the industry forever. Since then, Copeland Scroll™ technology remains at the forefront for HVAC/R applications, impressing contractors and original equipment manufacturers (OEMs) with its superior efficiency, proven reliability and ease of installation.

With the broadest product line in the industry, Copeland Scroll compressors range from 1-60 HP, with over 80 million manufactured units worldwide. They have become the compressor of choice to lead the industry through major transitions, including new energy standards, regulation and the R-22 phase out in Asia. Copeland Scroll compressors can be used in single or tandem configurations and can also be modulated for increased efficiency and homeowner comfort.

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How It Works

How Scroll Compressors Work

The Copeland Scroll compressor has one scroll, or spiral, orbiting in a path defined by a matching fixed scroll. The fixed scroll is attached to the compressor body.

The orbiting scroll is coupled to the crankshaft and orbits, rather than rotates. The orbiting motion creates a series of gas pockets traveling between the two scrolls. On the outer portion of the scrolls, the pockets draw in gas, and then move into the center of the scroll, where the gas is discharged. As the gas moves into the increasingly smaller inner pockets, the temperature and pressure increase to the desired discharge pressure

Design Benefits

Better Liquid Handling
Radial compliance allows the scroll members to separate in the presence of liquid refrigerant, thus, providing protection against liquid damage

Greater Efficiency
With axial compliance, optimized force between two scrolls can be obtained, leading to high efficiency over the entire operating range.

Improved Sound and Vibration
The system operates at lower sound level and better sound quality. Vibration level is also improved due to lower discharge gas pulse compared with traditional compressors.

Unmatched Reliability

  • 70% fewer moving parts
  • Ability to start under any system load, without start components
  • Easy to service and maintain due to their compact size and lightweight, simple design
  • Engineered for optimum performance with today’s chlorine-free refrigerants
  • No complex internal suction and discharge valves for quieter operation and higher reliability
Vapor Injection Technology

Vapor Injection is the latest technology to improve efficiency and reliability of the compressor as well as the ability to maintain cooling/heating capacity at severe ambient conditions. The concept of Vapor Injection can be explained using the compression theory, which states that inlet volume and outlet volume are directly related to each other. This means that the compressor capacity can be raised by increasing the volume of inlet refrigerant. In application, the vapor injection line is added inside a Copeland Scroll® compressor to directly inject vapor refrigerant into the scroll unit, making it work like a two stage compression. Higher mass flow and sub cooling in the system leads to capacity gain and better efficiency.

Benefits include:

  • Improved system performance of up to 7-10% for cooling mode and up to 30% for heating mode
  • Improved reliability due to the injection of vapor refrigerant which significantly reduces scroll temperature.


Industry LeadingEmerson continues to invest in the evolution and improvement of its Copeland Scroll® compressor technology to meet environmental goals and indoor comfort and efficiency needs. Copeland Scroll compressors have been instrumental to achieve the increased energy regulation and standards in Asia like: CSPF/HSPF in South Korea and High energy labeling in Thailand, China, Taiwan, India, etc. Copeland Scroll technology has also lead the industry in the recent R-22 phase out. For example, Copeland Scroll compressors are designed for use with the chlorine-free, environmentally friendly R-410A refrigerant to replace the use of R-22.
ApplicationsWith over 80 million units manufactured and 10 plant facilities worldwide, Copeland Scroll compressors are setting the standard for performance and energy efficiency. Click below to find out where Copeland Scroll compressors are used:

Residential Applications
Commercial Applications


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