公开(公告)号：US4006672A

公开(公告)日：1977-02-08

申请号：US637710

申请日：1975-12-04

申请人： Masaya Matsuyoshi ,  Isao Hirano

发明人： Masaya Matsuyoshi ,  Isao Hirano

IPC分类号： F04D25/14 ,  F24F7/013 ,  F24F13/20 ,  F24F13/08

CPC分类号： F04D25/14 ,  F24F13/20 ,  F24F7/013

摘要： A ventilation fan (ventilation system) which may be readily installed regardless of the length of a ventilation hole formed through the wall of a building even when the wall is of the double-wall type having an air insulating layer formed between the outer and inner wall members. The members of a duct frame are prefabricated in a factory and assembled at a job site in order to reduce the dimensions of the package, thereby reducing the packing and crating, storage and transportation costs.

摘要翻译： 通风扇（通风系统）可以容易地安装，而不管通过建筑物的壁形成的通风孔的长度，即使当壁是具有在外壁和内壁之间形成的空气绝缘层的双壁型 会员 管道框架的构件在工厂预制并组装在作业现场，以减小包装的尺寸，从而减少包装和装箱，储存和运输成本。