Ukomisa okokuqandisa, okubuye kwaziwe ngokuthi ukomiswa yiqhwa, kuyinqubo esusa umswakama entweni ngokusebenzisa i-sublimation, okuholela emkhiqizweni owomile.Isetshenziswa kakhulu ezimbonini ezahlukahlukene ezihlanganisa ezemithi, ukucubungula ukudla kanye namalabhorethri ocwaningo.Umgomo walobu buchwepheshe obumangalisayo usemandleni okuqanda into ethile bese usebenzisa i-vacuum ukuze kukhishwe ama-molecule amanzi ayiqhwa ngaphandle kokuwancibilikisa abe uketshezi.

Inqubo yokumisa iqhwa ihlanganisa izigaba ezintathu eziyinhloko: ukuqandisa, ukomisa okuyisisekelo nokomisa kwesibili.Phakathi nesigaba sokuqandisa, into iqale ipholiswe ibe ngaphansi kwezinga lokushisa eliphansi, ngokuvamile libe ngaphansi kwendawo yalo yokuqandisa.Lokhu kufezwa ngokubeka impahla ekamelweni lokumisa iqhwa futhi usebenzise uhlelo lwesiqandisi ukuze udale indawo elawulwayo.Uma into iqandisiwe, ingadlulela esinyathelweni esilandelayo.

Ukomisa okuyisisekelo kuyisinyathelo esibalulekile ekumisweni yiqhwa.Lena inqubo ye-sublimation, lapho ama-molecule amanzi ayiqhwa esuka ngokuqondile esimweni esiqinile aye esimweni segesi ngaphandle kokudlula esigabeni soketshezi.Lokhu kufezwa ngokufaka i-vacuum ekamelweni lokumisa iqhwa, ukunciphisa ukucindezela nokuhwamuka kwama-molecule amanzi.Ukugcina izinga lokushisa liphansi ngalesi sinyathelo kuvimbela umkhiqizo ukuthi ungonakali noma uwohloke.

Isinyathelo sokugcina, ukomiswa kwesibili, kubalulekile ukuze kukhishwe noma yimaphi ama-molecule amanzi abophekile angasuswanga esinyathelweni sokuqala sokumisa.Kufinyelelwa ngokukhuphula kancane izinga lokushisa ngaphakathi kwegumbi lokomisa iqhwa, okubangela ukuba ama-molecule amanzi asele ahwamuke.Lesi sinyathelo siqinisekisa futhi ukuzinza kwesikhathi eside kanye nekhwalithi yomkhiqizo omisiwe.

Umgomo wokumisa iqhwa usekelwe emcabangweni wokulondoloza isakhiwo sokuqala kanye nezakhiwo zento.Ngokungafani nezinye izindlela zokomisa ezifana nokomisa komoya noma ukomisa isifutho, ukomisa iqhwa kunciphisa umonakalo obangelwa amazinga okushisa aphezulu kanye noshintsho lwengcindezi.Ngokufriza okokusebenza kanye nokukhipha amanzi ngokusebenzisa i-sublimation, ubuqotho bomkhiqizo kanye nenani lokudla kwawo, ukunambitheka kanye nephunga elimnandi kuyalondolozwa.

Ukusetshenziswa kobuchwepheshe bokumisa iqhwa kuyanda ezimbonini ezahlukahlukene.Emkhakheni wemithi, isetshenziswa kakhulu ukulondoloza izinto eziphilayo, imigomo nezidakamizwa.Imikhiqizo eyomisiwe ingenziwa kalula ngamanzi ukuze igcinwe kalula, ihambe futhi isetshenziswe ngokulandelayo.

Embonini yokudla, ukomisa iqhwa kwenza kube lula ukulondoloza ukudla okonakalayo njengezithelo, imifino kanye nemikhiqizo yobisi.Inqubo igcina ukunambitheka kwemvelo nokuthungwa kokudla kuyilapho inweba impilo yakho yeshalofu.Ukwengeza, ukudla okufakwe iqhwa akusindi futhi kuhlangene, okwenza kuthandeke kubantu abaqwala izintaba, abakhempa, nosomkhathi ngoba kuvumela ukugeleza kwamanzi kalula.

Kafushane, umgomo wokomisa iqhwa usekelwe enqubweni ye-sublimation, lapho ama-molecule wamanzi ayiqhwa aguqulwa ngokuqondile ukusuka kokuqinile ukuya kwegesi ngaphansi kwe-vacuum.Ubuchwepheshe buqinisekisa ukuthi ukwakheka kwasekuqaleni kanye nezakhiwo zento ethile kuyagcinwa, okuyenza ibe yigugu ezimbonini ezifana nemithi kanye nokucubungula ukudla.Ikhono lokumisa iqhwa ukuze kukhiqizwe imikhiqizo eyomile ephila eshalofini enwetshiwe kanye nokonakala okuncane kwenze ukuba iqhwa kube indlela ekhethwayo yokulondoloza emhlabeni wonke.