| 摘要 |
<p>A vacuum lunch box having refrigeration and heating functions is provided to keep upper and lower cases of the lunch box in an air tight state and to release air outside automatically if the internal pressure of a hot food storage space increases exceedingly. A vacuum lunch box includes a body(10) having a number of food storage spaces(18), and a cover(20). Both the body and the lid have heat insulating materials provided between the upper and the lower cases(12,14,22,24), respectively. The top rim of each of the storage spaces(18) has a protruded portion(19), and a packing ring(29) is formed at the cover, correspondingly to the protruded portion. The cover has air outlets that are opened or closed by the internal pressure of the storage spaces. Also, locking units(52,54) are placed in recess areas(17,27) of each of the cover and the body.</p> |
