Patent ID: 8502118

Claim:
An energy-saving and heat preservation device comprising: a heating device ( 1 ) for conducting heating connected with a receptacle ( 2 ), the heating device including an upper receiving slot ( 11 ) and a lower receiving slot ( 12 ); the receptacle ( 2 ) for receiving material to be heated including an upper end ( 21 ) and a lower end ( 22 ), the receptacle ( 2 ) being disposed between the upper and lower receiving slots ( 11 ), ( 12 ) during heating; and a heat preservation device ( 3 ) reversibly coupled to the heating device ( 1 ), the heat preservation device ( 3 ) including a first chamber ( 31 ) and a second chamber ( 32 ) wherein the first and second chambers ( 31 ),( 32 )are reversibly and interchangeably received within said upper and lower receiving slots ( 11 ), ( 12 ), said first and second chambers ( 31 ),( 32 ) being in fluid communication one with the other through a conduit ( 34 ) extending between said first and second chambers ( 31 ), ( 32 ), wherein an energy storage material ( 33 ) received within said heat preservation device ( 3 ) is transferred between said first and second chambers ( 31 ), ( 32 ) through said conduit ( 34 ) as said energy storage material undergoes a reversible phase change from solid to liquid.