Makina othamanga-ozizira kwambiri ndi chipangizo cha mafakitale chomwe chimachepetsa kutentha kwa chakudya mpaka kuzizira kwambiri, zomwe zimapangitsa kuti zidutse pamalo opangira madzi oundana m'kanthawi kochepa, motero zimasunga chakudya. Mfundo yake yogwirira ntchito imachokera pa kutentha kwa kutentha ndi kutentha kwa convection. Choyamba, chakudyacho chimayikidwa pa lamba wonyamula katundu ndikulowa m'malo otsika-makina otenthedwa-ozizira kwambiri. Mkati mwa makinawo, firiji (nthawi zambiri imagwiritsa ntchito ammonia kapena Freon ngati firiji) imapanga mpweya wozizira. Mpweya wozizirawu umakakamizika kuzungulira ndi fani, kusinthanitsa kutentha ndi pamwamba pa chakudya ndikuchotsa kutentha mofulumira.
Kutentha kwachangu-makina oziziritsa kuzizira kumawongoleredwa pakati pa -30 digirii ndi -madigirii 120 , kutengera mtundu wa chakudya ndi kuzizira-kwachangu. Nthawi yofulumira{{11}yozizira kwambiri imakhala 10-mphindi 25, kuonetsetsa kuti kutentha kwa chakudya kumatsika msanga -madigiri 18 , zomwe zimalepheretsa tizilombo toyambitsa matenda komanso kutalikitsa moyo wa alumali. Zigawo zazikulu zamakina ofulumira{14}woziziritsa ndi monga kompresa mufiriji, evaporator, condenser, fan, ndi control system. Evaporator imayamwa kutentha m'chakudya, kompresa ya mufiriji imakanika kutsika-kutentha, kutsika{16}}kutsika kwa gasi mufiriji{17}}kutentha kwambiri, gasi wothamanga kwambiri, ndipo condenser imaziziritsa mpweya wotentha kwambiri, wothamanga kwambiri kuti ukhale mufiriji wotentha kwambiri.
