Aircraft monument with improved thermal insulation and acoustic absorption
View Patent ↗A protective shell for an aircraft galley wall is disclosed having an above work deck area and a below work deck area, the protective shell having an outer skin, an intermediate layer comprising vacuum insulated panels, and an interior layer comprising carbon fiber composite having a thickness that is greater than a thickness of the intermediate layer. In a preferred embodiment, the protective shell also includes an acoustic insulating layer made of an open cell acoustic foam that absorbs galley noise.
1. A protective shell for an aircraft galley wall having an above work deck area and a below work deck area, comprising:
an outer skin having a thickness and micro-perforations along an outer surface;
an intermediate layer comprising vacuum insulated panels, where a thickness of said intermediate layer is greater than the thickness of the outer skin; and
an interior layer comprising carbon fiber composite having a thickness that is greater than a thickness of the intermediate layer.
2. The protective shell for an aircraft galley wall of claim 1 , further comprising a layer of open cell acoustic foam between the skin and the interior layer.
3. The protective shell for an aircraft galley wall of claim 2 , wherein the layer of open cell acoustic foam is present only above the work deck.
4. The protective shell for an aircraft galley wall of claim 2 , wherein a ratio of a thickness of the acoustic open cell foam to the thickness of the carbon fiber composite panel is 2:1.
5. The protective shell for an aircraft galley wall of claim 1 , wherein a ratio of outer skin thickness to intermediate layer thickness is 1:2.
6. The protective shell for an aircraft galley wall of claim 1 , wherein the micro-perforations are conical.
7. The protective shell for an aircraft galley wall of claim 1 , wherein the vacuum insulation panels are located adjacent thermal sinks to reduce energy loss.