当前各公共建筑内防火门大多数采用的是常闭式闭门器。这种闭门器在无消防智能网的情况下或是人员流动量不大的场所使用是比较合适的。但若各公共场所的人流和物流需在防火门内频繁通过,这种常闭式防火门频繁开启、关闭所带来的麻烦就不适应现代生活和工作的便利要求了。所以能 Currently most public buildings fire doors are used normally closed door closers. This closer in the absence of fire intelligence network or the flow of personnel is not the place to use is more appropriate. However, if the flow of people and logistics in public places to pass frequently in the fire door, this often closed fire doors frequently open, shut down the inconvenience caused by not meet the conveniences of modern life and work requirements. So can