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Features and
Benefits
PKG-PRC002-EN 7
Trane 3-D
®
Scroll Compressor
Simple Design with 70% Fewer Parts
Fewer parts than an equal capacity
reciprocating compressor means
significant reliability and efficiency
benefits. The single orbiting scroll
eliminates the need for pistons,
connecting rods, wrist pins, and valves.
Fewer parts lead to increased reliability.
Fewer moving parts, less rotating mass,
and less internal friction means greater
efficiency than reciprocating compressors.
Patented 3-D Scroll Compliance
Trane 3-D scroll compliance provides
important reliability and efficiency
benefits. 3-D compliance allows the
orbiting scrolls to touch in all three
dimensions, forming a completely
enclosed compression chamber that leads
to increased efficiency. In addition, 3-D
compliance means the orbiting scrolls only
touch with enough force to create a seal—
so there is no wear between the scroll
plates. The fixed and orbiting scrolls are
made of high strength cast iron—resulting
in less thermal distortion, less leakage,
and higher efficiencies. The most
outstanding feature of the scroll
compressor 3-D compliance is that
slugging will not cause failure. In a
reciprocating compressor, however, liquid
or dirt can cause serious damage.
Low Torque Variation
The 3-D scroll compressor has a very
smooth compression cycle with torque
variations that are only 30 percent of that
produced by a reciprocating compressor.
This means the scroll compressor
imposes very little stress on the motor for
greater reliability. Low torque variation
means reduced noise and vibration.
Suction Gas Cooled Motor
Compressor motor efficiency and
reliability are further optimized with this
design. Cool suction gas keeps the motor
cooler for longer life and better efficiency.
Proven Design Through Testing and
Research
With over twenty years of development
and testing, Trane 3-D scroll compressors
have undergone more than 400,000 hours
of laboratory testing and field operation.
This work combined with over 25 patents
makes Trane the worldwide leader in air
conditioning scroll compressor technology.
One of two matched scroll plates — the
distinguishing feature of the scroll
compressor.
The Chart above illustrates low torque
variation of 3-D Scroll compressors as
compared to a reciprocating compressor.