Scroll Technology

There are 6 major components in a scroll design:

• Fixed Scroll
• Orbiting Scroll
• Housing
• Motor
• Drive Pin
• Idler Shafts

The motor and the fixed scroll are mounted to the housing, which holds the orbiting scroll and other rotating components. The motor drives the orbiting scroll through a crank shaft via the drive pin, which translates rotation motion from the motor into orbiting motion for the scroll compressor. Three idler shafts mounted between the orbiting and fixed scroll insure that the orbiting scroll maintains its position relative to the fixed scroll. All together the idler shafts, fixed and orbiting scroll are referred to as the scroll pack.

The scroll pack contains one inlet ports a discharge port and two acting chambers on either side of the compressor. At any one point during operation, there can be as many as three compression processes occurring simultaneously. There are two chambers formed by close interaction between a fixed and orbiting scroll involute curve. The 1st chamber starts on the inside of the fixed scroll wrap and is half a wrap shorter in length than the 2nd chamber located on the outside of the fixed scroll wrap. Each chamber goes through the same processes.

• The scroll compressor can be completely oil-free.
• Rotary type motion allows the compressor to be perfectly balanced for low vibration and noise.
• There are no valves or other wearing parts.
• A scroll compressor can run at higher speeds of 6000 rpm or higher without compromising quiet, efficient operation.
• Scroll compressor can be manufactured at a competitive cost using Air Squared’s manufacturing techniques.
• A scroll compressor is a positive displacement compressor which results in higher efficiency and high pressure capability.
• There are only two primary moving parts resulting in high reliability and simplification of the manufacturing process.
• Rubbing velocity is low resulting in low noise and low wear.