| 摘要 |
<p>A fresh-keeping box has a cover body (1), a box body (2), at least one vacuum pumping device (3) and at least one air inlet device (4). The cover body (1) is hermetically connected with the box body (2) to form an accommodation space. The vacuum pumping device (3) includes a cylinder (31), a piston rod (32), a plug (33) and a one-way air outlet device. The plug (33) is fixedly mounted on the inner end part of the piston rod (32) which is arranged in the cylinder (31), and the plug (33) is matched and hermetically contacted with the inner wall of the cylinder (31). The one-way air outlet device is located on the inner end part of the cylinder (31). The fresh-keeping box effectively keeps food fresh by separating the food in the box from air. It is simple in structure, convenient to use and easy to carry.</p> |
