| 摘要 |
PURPOSE: A door closer and a door system, in which the door closer is included, is provided to minimize additional charge to prevent damage by preventing the delivery of heat door to door in fires. CONSTITUTION: A door closer and a door system are fixed in a door(110). A first insulating material and a second insulating material are located on the bottom of a connecting part which extended from both end of a door closer. An insulating member(200) is aerogel. A joint hole makes the door closer to be fixed to a door. |
