Vacuum isikhwama sokupakisha ukudla esiqandisiwe
Izici Zomkhiqizo
Ngaphezu kwalokho, izikhwama zokupakisha ukudla ezifakwe iqhwa zikhombisa ukumelana nezinga lokushisa eliphezulu.Lezi zikhwama ziklanyelwe ukumelana namazinga okushisa aphansi kakhulu angaphansi kuka -18°C (-0.4°F) ngaphandle kokuphazamisa ubuqotho bazo.Izinto ezisetshenziswayo, njengenayiloni noma i-polyethylene (PE), zinokumelana nokuqandisa okuhle kakhulu, okuzenza zifanelekele ukugcinwa kwezinga lokushisa eliphansi.Lesi sici siqinisekisa ukuthi ukudla okuqandisiwe kuhlala kusesimweni esifanele, kugcina ukunambitheka kwakho, ukuthungwa, kanye nokudla okunomsoco ngisho nangaphansi kwezimo ezibandayo.
Ngaphezu kwezakhiwo zazo zokufaka uphawu kanye nokubanda, izikhwama zokufaka ukudla eziqandisiwe zevacuum zaziwa ngokuguga kwazo okuphawulekayo nokungadabuki.Lezi zikhwama zikhiqizwa kusetshenziswa izinto ezihlala isikhathi eside neziqinile ezingamelana nobunzima bokuphatha nezokuthutha.Aklanyelwe ukuthi amelane nezinyembezi futhi angabhoboki, anikeze isivikelo esithembekile emonakalweni wengozi noma ukuvuza okungase kube khona.Lokhu kuqinisekisa ukuthi ukudla okupakishiwe kuhlala kunjalo futhi kuvikelekile kulo lonke uhambo lwakho kusukela ekukhiqizweni kuya kumthengi wokugcina.
Izikhwama zokufaka ukudla eziqandisiwe ze-vacuum nazo azisindi, ngenxa yemvelo yazo ephansi.Lokhu kuwenza alula futhi aphatheke kalula, uwagcine, futhi uwathuthe.Idizayini engasindi ayigcini nje ngokuvumela ukusetshenziswa kahle kwesitoreji kodwa futhi yehlisa izindleko zokuthumela.Abakhiqizi bangakwazi ukuthuthukisa izinqubo zabo zokupakisha ngokwandisa inani lezikhwama ezingathuthwa ngesikhathi esisodwa, ngaleyo ndlela behlise zonke izindleko zezokuthutha.
Okokugcina, izikhwama zokupakisha ukudla ezifriziwe zicofa zikhuthaza ukusimama kwemvelo.Eziningi zalezi zikhwama zingasetshenziswa kabusha, okusho ukuthi zingawashwa futhi zisetshenziselwe ukuvala i-vacuum noma ukugcina ukudla okuhlukile.Ngokunciphisa isidingo sokupakisha okukodwa, izikhwama ze-vacuum zifaka isandla ekwehliseni udoti wepulasitiki futhi zibe nomthelela ophansi kwezemvelo uma kuqhathaniswa nezinketho zokupakisha ezilahlwayo.
Isifinyezo somkhiqizo
Sengiphetha, izikhwama zokufaka ukudla eziqandisiwe zevacuum zinikeza izinzuzo eziningi kubo bobabili abakhiqizi nakubathengi.
Ubuchwepheshe bazo obuthembekile bokubeka uphawu, ukumelana nezinga lokushisa eliphezulu okuqandayo, ukumelana nokuguga, ukwakheka okungasindi, kanye nobungane bemvelo kubenza babe ukukhetha okuhle kokugcina ukudla okufriziwe.Ngamandla azo okugcina ikhwalithi nempilo yeshalofu yemikhiqizo eqandisiwe, lezi zikhwama zidlala indima ebalulekile ekuqinisekiseni ukuthi abathengi bangajabulela ukudla okuqandisiwe okumnandi nokunomsoco kalula nangokuphephile.