A chowumitsira chozizira, yomwe nthawi zambiri imatchedwa lyophilizer, ndi chipangizo chatsopano chomwe chimapangidwa kuti chisunge chakudya ndi zinthu zina zomwe zimatha kuwonongeka mwa kuchotsa chinyezi kudzera mu njira yotchedwa kuuma mufiriji. Njirayi ikutchuka kwambiri ndi okonda chakudya, okonda kupulumuka, ndi omwe akufuna kuwonjezera nthawi yogwiritsira ntchito zakudya zomwe amakonda popanda kuwononga kukoma kapena thanzi lawo.
Njira yowumitsa mufiriji imayamba mwa kuzizira chinthucho pa kutentha kochepa kwambiri, nthawi zambiri pafupifupi -40°F mpaka -50°F. Gawo loyambali limalimbitsa madzi omwe ali mu chakudyacho. Pambuyo pa kuzizira, makinawo amapanga vacuum, yomwe imachepetsa kupsinjika kozungulira chakudyacho. Izi zimathandiza kuti ayezi azitha kuzizira, zomwe zikutanthauza kuti amachoka pa chinthu cholimba kupita ku mpweya popanda kukhala madzi. Zotsatira zake zimakhala chakudya chopepuka, chokhalitsa chomwe chimasunga kukoma kwake koyambirira, mtundu, ndi michere.
Chimodzi mwa ubwino waukulu wogwiritsa ntchito choumitsira chozizira ndi kuthekera kwake kusunga zakudya zosiyanasiyana, kuphatikizapo zipatso, ndiwo zamasamba, nyama, komanso chakudya chokwanira. Kusinthasintha kumeneku kumapangitsa kuti chikhale chida chofunikira kwa aliyense amene akufuna kusunga chakudya kwa nthawi yayitali, kukonzekera zadzidzidzi, kapena kungosangalala ndi zokolola zanyengo chaka chonse.
Kuphatikiza apo, zakudya zouma mufiriji ndizosavuta kwambiri. Zitha kubwezeretsedwanso mosavuta pongowonjezera madzi, zomwe zimapangitsa kuti zikhale zoyenera kukakhala m'misasa, kukwera mapiri, kapena kudya chakudya cham'mawa kunyumba. Ndipo nthawi yayitali yosungiramo zakudya (nthawi zambiri kupitirira zaka 25) imatanthauza kuti mutha kusunga zakudya zomwe mumakonda popanda kuda nkhawa kuti zidzawonongeka.
Pomaliza, makina owumitsa oundana ndi chida champhamvu chosungira chakudya panthawi yowumitsa mufiriji. Chifukwa cha kuthekera kwake kosunga ubwino ndi thanzi la chakudya, ndi ndalama yopindulitsa kwa aliyense amene akufuna kukonza njira zawo zosungira chakudya. Kaya ndi zogwiritsidwa ntchito payekha kapena zamalonda, makina owumitsa oundana akusintha momwe timaganizira za kusunga chakudya.
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