| 摘要 |
PURPOSE: A temperature maintaining device is provided to prevent the goods in a body from becoming damaged by charging the gas in the body if the door attached to the body closes. CONSTITUTION: A temperature maintaining device(100) comprises a body(110), a door(120), and a nitrogen gas charging system(130). The door is attached to one side of the body to be able to open and close. If the door closes, the nitrogen gas charging system removes the inner air from the body and charges with nitrogen. The nitrogen gas charging system comprises a vacuum motor(140), a nitrogen storage(150), and a connecting pipe(151). The vacuum motor removes the inner air from the body. The nitrogen storage stores the nitrogen gas. The connecting pipe connects the nitrogen storage to the body. |
