The internal structure of these compressors consists of two snail-like spirals, one fixed and the other mobile.
The movable snail rotates at high speed within the stationary snail, 180° in the opposite direction.

Sealing is achieved between the precisely machined and high-speed rotating snails with the oil absorbed together with the refrigerant.

As a result of the snail (spiral) structures rotating towards each other, gas is absorbed into the spaces formed between the snail spirals. The absorbed gas is transported to successive smaller volume spiral pockets and the compression process continues increasingly until the center of the snail parts.

Since the system capacity is a function of scroll rotor speed and volume, it is structurally classified as a positive displacement compressor.

In scroll compressors, the snail (spiral) parts, one of which is fixed and the other is movable, are supported on each other at both ends and are precision machined to ensure sealing between them.

Scroll compressors do not have suction and discharge valves. If we examine carefully Figure 2.14, the refrigerant coming from the suction opens directly to the body and comes into contact with the electric motor windings.

The discharge outlet fills the upper part of the body and is discharged from the discharge pipe. In other words, there is no contact of the hot gas in the discharge with the electric motor windings. This structure will somewhat prevent the scroll compressor from being exposed to high temperatures and refrigerant liquid impacts.