What Is a Hermetic Compressor and How Does It Work?
A hermetic compressor is a compressor whose motor and compression mechanism sit inside the same sealed steel shell.
How does a hermetic compressor work?
According to Copeland’s description, hermetic reciprocating compressors compress refrigerant vapor with a piston-driven mechanism sealed within a welded steel shell. The motor-driven crankshaft moves pistons within cylinders; the pistons draw in low-pressure refrigerant vapor, compress it to a higher pressure and temperature, and discharge it to the condenser. Copeland also states that the sealed construction of its hermetic reciprocating compressors eliminates the need for routine motor or bearing maintenance.
What to look at in the datasheet when selecting a model
- Refrigerant: the hermetic compressors in our catalogue with datasheet data run on R134a, R404A, R290 or R600a. The Tecumseh service handbook states that hermetic compressors are designed for a specific refrigerant and asks that only the refrigerant on the serial label be used. See our article on refrigerants.
- Capacity: datasheets give cooling capacity in W or kcal/h, for the test conditions written in the datasheet.
- Operating range: LBP, MBP and HBP indicate the evaporating temperature range the compressor is designed for. For detail, see our article on LBP, MBP and HBP.
The models, refrigerants and datasheets of our Cubigel and Zingfa hermetic compressors are in the Cubigel and Zingfa catalogues. To learn how to read the model codes, see the Cubigel compressor guide and the Zingfa selection guide. For product information, pricing and current availability, contact TURA Soğutma.