Chinthu chosefera ndi gawo lofunika kwambiri la cholekanitsa mafuta a mpweya. Kawirikawiri, cholekanitsa mafuta a mpweya choyenerera kwambiri chimapezeka ndi chinthu chosefera chomwe nthawi yake yogwira ntchito ndi maola masauzande ambiri. Chifukwa chake, mtundu uwu wa cholekanitsa umatha kutsimikizira kuti compressor ya mpweya imagwira ntchito bwino kwambiri. Mpweya wopanikizika ukhoza kukhala ndi madontho ambiri amafuta ang'onoang'ono okhala ndi mainchesi osakwana 1um. Madontho onse amafutawo adzasefedwa ndi chinthu chosefera cha ulusi wagalasi. Pogwiritsa ntchito mphamvu ya fyuluta, adzafupikitsidwa mwachangu kukhala akuluakulu. Madontho akuluakulu amafuta adzasonkhanitsidwa pansi pansi pa ntchito yokoka. Pomaliza, adzalowa mu dongosolo lopaka mafuta kudzera mu chitoliro chobwezera mafuta. Chifukwa chake, mpweya wopanikizika womwe umatuluka mu compressor ya mpweya ndi woyera, ndipo suli ndi mafuta aliwonse.
Koma mosiyana ndi madontho a mafuta ang'onoang'ono, tinthu tolimba mu mpweya wopanikizika tidzakhalabe mu gawo losefera, zomwe zimapangitsa kuti mphamvu yosiyana ikule kwambiri. Ngati mphamvu yosiyana ili pakati pa 0.08 ndi 0.1Mpa, ndiye kuti muyenera kusintha chinthu chosefera. Kupanda kutero, mtengo wogwiritsira ntchito compressor ya mpweya udzakwera kwambiri.