The difference between screw compressor and scroll compressor

There are some differences between screw compressors and scroll compressors in terms of structure, working principle and application.

structure and working principle:

screw compressor: consists of a pair of parallel arrangement, intermeshing male and female rotors (I. e. screw). When the rotor rotates, the air between the rotor slots is continuously compressed and discharged. Screw compressor has the characteristics of simple structure, small size, light weight, few parts and high reliability. In addition, the screw compressor has no reciprocating mass inertia force, so it has good dynamic balance performance, stable operation and low vibration.

Scroll compressor: by a fixed involute scroll and an eccentric rotation of the involute motion scroll. Scroll compressors compress gas by the relative motion of the two scrolls. The scroll compressor is characterized by a small pressure difference between the two adjacent chambers and a small amount of gas leakage, so it has a high volumetric efficiency. In addition, the scroll compressor has a small torque variation range, small vibration, and low noise.

Application:

screw compressor: widely used in various industrial fields, such as refrigeration, air conditioning, air compression, etc. Screw compressors are particularly suitable for occasions where large flow rates and low pressure ratios are required. In addition, the screw compressor also has a high energy efficiency and a long service life.

Scroll compressor: mainly used in small refrigeration and air conditioning systems, such as household air conditioning, commercial air conditioning, etc. Scroll compressors have high efficiency at low gas volumes and therefore perform better in small systems. In addition, the compact structure, light weight, and low noise of the scroll compressor make it advantageous in some situations where noise and vibration requirements are high.

In summary, there are obvious differences between screw compressors and scroll compressors in terms of structure, working principle and application. Which type of compressor to choose depends on the specific application needs and scenarios.