| 摘要 |
PROBLEM TO BE SOLVED: To provide an economical portable heating box without the danger of generating heat at the time of transportation capable of being reutilized by changing a heating element. SOLUTION: A water tray 2 is provided on the inner bottom of a box body 1 composed of a material provided with a heat resistance property and a water resistance property and provided with an opening/closing lid and the heating element 3 composed by putting a heat generation agent for generating the heat by adding water inside a bag made of nonwoven fabric is provided inside the water tray. A tray 4 for which a water pouring hole 9 and many holes 8 for steam elevation are opened on the bottom is provided in a single stage or multiple stages on the water tray and further, a water supply valve 5 serving also as a steam leakage valve matched with the hole of the tray is provided on the lid. |
