Izinga lokushisa ngaphakathiisikhunta umjovoayilingani emaphuzwini ahlukahlukene, okubuye kuhlobane nephuzu lesikhathi emjikelezweni womjovo.Umsebenzi womshini wokushisa wesikhunta ukugcina izinga lokushisa lingaguquki phakathi kuka-2min no-2max, okusho ukuvimbela umehluko wezinga lokushisa ekuguquguqukeni phansi naphezulu phakathi nenqubo yokukhiqiza noma igebe.Izindlela zokulawula ezilandelayo zifanele ukulawula izinga lokushisa lesikhunta: Ukulawula izinga lokushisa loketshezi kuyindlela esetshenziswa kakhulu, futhi ukunemba kokulawula kungahlangabezana nezidingo zezimo eziningi.Ukusebenzisa le ndlela yokulawula, izinga lokushisa eliboniswa kwisilawuli alihambisani nezinga lokushisa lesikhunta;izinga lokushisa lesikhunta liyashintshashintsha kakhulu, ngoba izici ezishisayo ezithinta isikhunta azikalwanga ngokuqondile futhi zinxeshezelwe lezi zici ezihlanganisa izinguquko emjikelezweni womjovo, isivinini somjovo, izinga lokushisa elincibilikayo kanye nezinga lokushisa leGumbi.Okwesibili ukulawula okuqondile kokushisa kwesikhunta.Le ndlela iwukufaka inzwa yokushisa ngaphakathi kwesikhunta, esetshenziswa kuphela lapho ukunemba kokulawula izinga lokushisa kwesikhunta kuphakeme kakhulu.Izici eziyinhloko zokulawula ukushisa kwesikhunta zihlanganisa: izinga lokushisa elibekwe isilawuli lihambisana nokushisa kwesikhunta;izici ezishisayo ezithinta isikhunta zingalinganiswa ngokuqondile futhi zinxeshezelwe.Ngaphansi kwezimo ezijwayelekile, ukuzinza kwezinga lokushisa lesikhunta kungcono kunokulawula izinga lokushisa loketshezi.Ngaphezu kwalokho, ukulawulwa kwezinga lokushisa kwesikhunta kunokuphindaphinda okungcono ekulawuleni inqubo yokukhiqiza.Okwesithathu ukulawula ngokuhlanganyela.Ukulawula okuhlangene kuwukuhlanganiswa kwezindlela ezingenhla, kungalawula izinga lokushisa loketshezi kanye nesikhunta ngesikhathi esifanayo.Ekulawuleni okuhlangene, indawo yenzwa yokushisa esibunjeni ibaluleke kakhulu.Uma ubeka inzwa yokushisa, ukuma, isakhiwo, nendawo yesiteshi sokupholisa kufanele kucatshangelwe.Ngaphezu kwalokho, inzwa yokushisa kufanele ibekwe endaweni edlala indima enqumayo kukhwalithi yezingxenye ezibunjwe ngomjovo.Kunezindlela eziningi zokuxhuma umshini wokushisa wesikhunta owodwa noma ngaphezulu kusilawuli somshini wokubumba umjovo.Kungcono ukusebenzisa isixhumi esibonakalayo sedijithali mayelana nokusebenza, ukwethembeka kanye nokuphikisana nokuphazamiseka.

Ibhalansi yokushisa yeisikhunta umjovoilawula ukuqhutshwa kokushisa phakathi komshini wokubumba umjovo kanye nesikhunta siyisihluthulelo sokukhiqizwa kwezingxenye ezibunjiwe zomjovo.Ngaphakathi kwesikhunta, ukushisa okulethwa ipulasitiki (okufana ne-thermoplastic) kudluliselwa ezintweni kanye nensimbi yesikhunta ngemisebe eshisayo, futhi idluliselwe kuketshezi lokudlulisa ukushisa ngokusebenzisa i-convection.Ngaphezu kwalokho, ukushisa kudluliselwa emkhathini kanye nesisekelo sesikhunta ngemisebe eshisayo.Ukushisa okumuncwa uketshezi lokudlulisa ukushisa kuthathwa umshini wokushisa wesikhunta.Ibhalansi eshisayo yesikhunta ingachazwa ngokuthi: P=Pm-Ps.Lapho u-P ewukushisa othathwe umshini wokushisa wesikhunta;I-Pm ukushisa okwethulwa yipulasitiki;Ps ukushisa okukhishwa isikhunta emkhathini.Inhloso yokulawula izinga lokushisa lesikhunta kanye nomthelela wokushisa kwesikhunta ezingxenyeni ezibunjwe ngomjovo Enqubweni yokubumba umjovo, inhloso eyinhloko yokulawula izinga lokushisa lesikhunta ukushisa isikhunta ekushiseni okusebenzayo, nokugcina izinga lokushisa lesikhunta lingaguquki ekushiseni okusebenzayo.Uma amaphuzu amabili angenhla ephumelela, isikhathi somjikelezo singalungiswa ukuze kuqinisekiswe izinga eliphezulu elizinzile lezingxenye ezibunjwe ngomjovo.Izinga lokushisa lesikhunta lizothinta izinga eliphezulu, uketshezi, ukushwabana, umjikelezo womjovo kanye nokuwohloka.Izinga lokushisa lesikhunta elidlulele noma elinganele lizoba nemiphumela ehlukene ezintweni ezihlukene.Ngama-thermoplastics, izinga lokushisa eliphakeme lesikhunta ngokuvamile lizothuthukisa ikhwalithi engaphezulu kanye noketshezi, kodwa lizonweba isikhathi sokupholisa kanye nomjikelezo womjovo.Izinga lokushisa eliphansi lesikhunta lizonciphisa ukushwabana esibunjeni, kodwa lizokwandisa ukuncipha kwengxenye ebunjiwe yomjovo ngemva kokubhidlizwa.Kupulasitiki we-thermoset, izinga lokushisa eliphakeme lesikhunta ngokuvamile linciphisa isikhathi somjikelezo, futhi isikhathi sinqunywa isikhathi esidingekayo ukuze ingxenye iphole.Ngaphezu kwalokho, ekucubunguleni amapulasitiki, izinga lokushisa eliphakeme lesikhunta lizophinde linciphise isikhathi sokwenza ipulasitiki futhi linciphise inani lemijikelezo.