Nyob rau hauv lub chiller system, lub compressor yog lub hwj chim qhov chaw rau tub yees. Nws tsub kom lub siab ntawm cov tub yees nyob rau hauv lub system, ua rau nws circulate thiab ua kom txias. Compressors tau muab faib ua peb hom raws li lawv cov qauv: qhib, semi-hermetic, thiab hermetic. Feem ntau cov tshuab chillers rau cov dej txias tshaj 0℃siv hermetic compressors, thaum qis -kub chillers rau chilled dej hauv qab 0℃siv semi-hermetic compressors (feem ntau ntsia hlau thiab reciprocating hom). Qhib- hom chillers feem ntau yog siv hauv cov tshuab tub yees siv ammonia ua cov tub yees.
Hermetic tub yees compressor yog ib chav tsev uas lub compressor thiab lub cev muaj zog nyob ua ke nyob rau hauv ib lub kaw hlau casing. Los ntawm sab nraud, tsuas yog lub tshuab nqus tsev nqus thiab cov kav dej tawm thiab lub cev muaj zog ntawm cov xaim hluav taws xob pom. Lub compressor casing yog muab faib ua rau sab sauv thiab qis, uas yog welded ua ke tom qab lub compressor thiab lub cev muaj zog raug ntsia. Nws tsis tuaj yeem disassembled nyob rau hauv ib txwm muaj xwm txheej, kom ntseeg tau tias kev ua haujlwm ruaj khov. Hermetic tub yees compressors muaj xws li reciprocating compressors thiab scroll compressors.