| 摘要 |
PURPOSE: An electrically heated lunch box using a semiconductor is provided to be simply heated and to be automatically controlled in temperature. CONSTITUTION: An electrically heated lunch box can be heated and heat food through self heating control using a semiconductor. The inner pressure of the lunch box can be easily controlled using an umbrella-shaped cover made of a rubber material. The lunch box has a dual body. A heat transmission metal plate is put in the dual body. The semiconductor is attached to the bottom metal plate and delivers heat. |
