Video narration
Jab frij ke andar ki cheezen thandi hoti hain, to unki garmi aakhir jaati kahan hai? Asal mein, frij thandak banata nahin; woh garmi ko andar se bahar, kamre mein pahunchata hai. Iske andar ghoomta ek khaas drav, khaane ke paas se garmi sokhta hai. Garmi paakar uski haalat badalti hai, aur woh aage badhta hai. Phir ek pump jaisa hissa use dabata hai. Dabaav badhne par drav aur garam ho jaata hai. Ab woh frij ke baahar apni garmi kamre ki hawa ko de deta hai. Garmi chhodne ke baad drav thanda hota hai. Uska dabaav ghatta hai, taaki woh phir andar garmi sokh sake. Kamre mein pahunchi garmi darasal wahi hai jo khaane aur frij ke andar se hataayi gayi thi. Yeh chakr lagataar chalta rehta hai, aur ise chalaane ke liye bijli lagti hai. To us garmi ka thikaana hai aapka kamra.