Heat sink na'ura ce don watsar da zafi zuwa kayan lantarki masu saurin zafi a cikin kayan lantarki, galibi an yi su da tagulla, tagulla ko tagulla a cikin nau'in faranti, zane, yanki mai yawa, da sauransu, kamar sashin sarrafa wutar lantarki na CPU a ciki. kwamfutar da za ta yi amfani da babban ɗumbin zafi, bututun samar da wutar lantarki, bututun layi a cikin TV, bututun amplifier a cikin amplifier shine a yi amfani da dumama zafi.