| 摘要 |
PURPOSE: An earthenware steamer having a heat insulation double wall, and a manufacturing method thereof are provided to prevent a condensation phenomenon when steaming rice cake. CONSTITUTION: An earthenware steamer comprises the following: a square pipe frame body(10) forming a steam chamber by molding a square pipe(11) into a square ring shape; a packaging installation panel(20) installed on the lower side of the square pipe frame body; an airtight maintaining packing(30) fitted to the packaging installation panel; a packing contact bar closely attached to the airtight maintaining packing; a packaging installation groove for fitting the airtight maintaining packing, formed on the packaging installation panel; an inside packing channel(22) including a separation preventing protrusions; an outer packing channel(24) located on the lower outside of the square pipe frame body; a wing unit located in between the inside and outside packing channels; protrusions projected from the center of the wings to the lower direction; and a vacuum inlet and a vacuum inlet opening and closing unit. |
