| 摘要 |
PURPOSE: A flexible aluminum foil duct hose for insulating heat is provided to improve rigidity of a duct hose and heat insulating functions by providing a double layered flexible aluminum foil duct hose and a compressed heat insulating sheet. CONSTITUTION: A flexible aluminum foil duct hose for retaining heat comprises internal and external flexible aluminum foil duct hoses(10,30) and a compressed heat insulating sheet(20). A flame retardant poly cotton is compressed to make the compressed heat insulating sheet. The internal flexible aluminum foil duct hose is spirally wound and wrapped with the compressed heat insulating sheet. The outer surface of the external flexible aluminum foil duct hose is coated to a color corresponding to the color of the installation location. The external flexible aluminum foil duct hose is fitted in the internal flexible aluminum foil duct hose.
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