Ni kofi ne, kai na dan karami, murzawa ta bude tana shan bakin ruwa, kiba jikina da kaya kala-kala.Ina da kyau sosai!Kuma TufafiNa daga su ake yibakin karfe.
Mu ne abubuwan bukatu na rayuwar zamani, kusan kowa yana da su.Kuma mu saboda halaye na thermal rufi, an fi son mutane.Tafasa ruwa a cikin kofi na yau da kullun, bayan wani lokaci daga zafi zuwa sanyi, irin wannan yanayin zafi shine ka'idar dabi'a, amma kofin thermos yana iya yin ruwan da ke cikin kofi bayan wani lokaci har yanzu yana iya kiyaye yanayin zafi kamar yadda yake. asali, don haka mutane musamman suna son irin wannanthermos kofin.
"Vacuum kofin“, mutane da yawa suna amfani da mu wajen shan ruwa kowace rana.Amma ka san dalilin da ya sa ruwan zafin da ke cikin kofin baya yin sanyi bayan ƴan sa'o'i?Shin kun san abin da ƙa'idodinmu ke da alaƙa da vacuum?
A shekara ta 1892, masanin kimiyyar lissafi dan kasar Scotland James Dewar ya kirkirovacuum kofin.Dewar gaba daya aikinsa na rayuwa ya kasance akan binciken cryogenics.Domin yin nazarin ruwan iskar gas, yana buƙatar akwati mai kyau mai kyau na zafin jiki.A wannan lokacin, tasirin yanayin zafi na kwandon ba shi da kyau, kuma zafi yana da sauƙi a rasa.Don haka Dewar ya yi tunanin wani wuri wanda ba zai iya canza zafi ba.Ruhinsa na bincike da kirkire-kirkire ya sanya abin da ya kirkira ya yi nasara.An sanya wa kwandon suna "Dewar" kuma daga baya ya zamavacuum kofinmuna amfani yanzu.
A cikin shekarun 1950, siyar da kayan maye ya kai kololuwar su saboda bukatar mutane.A cikin wannan lokacin, ana ɗaukar kofuna masu ban sha'awa a cikin ɓangarorin iyali, balaguron balaguro na bakin teku da sansanin filin wasa.Daga baya, kayan navacuum kofinan inganta ci gaba,bakin karfekuma yumbu ya zama babban kayan tanki na ciki da harsashi.An haɓaka ƙarfin keɓewar iska, wanda ke sa tasirin adana zafi na ƙoƙon adana zafi mafi kyau kuma mafi kyau.
Lokacin aikawa: Agusta-05-2020