HVAC Transition Box with Thin Composite Insulation for Standard Fit
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Solution Overview
Problem
Existing HVAC transition boxes face challenges in achieving increased resistance to thermal transfer while maintaining a standard size, as increased insulation thickness is required by new building codes, but this is not aesthetically pleasing and limits installation in smaller spaces without reducing available operable locations.
Innovation Solution
The use of a combination of a mineral wool layer and a reflective laminate layer, where the reflective laminate layer is placed outside or inside the transition box, forming a composite insulation with a combined thickness less than 2 inches, providing enhanced thermal resistance without the need for assembly by the installer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If increased thickness of mineral wool insulation is used to increase R value, then thermal resistance is improved, but the insulation does not fit within a standard size transition box
Solution Approach 1:
The patent combines mineral wool insulation with a reflective insulation layer to create a composite insulation system. This composite structure achieves higher R values in a thinner overall package, allowing the insulation to meet thermal resistance requirements while fitting within standard transition box dimensions.
Solution Approach 2:
The patent changes the physical and chemical parameters of the insulation system by introducing a reflective layer with different thermal properties. This layer reflects thermal radiation, complementing the conductive insulation properties of the mineral wool, thereby achieving superior thermal resistance at reduced thickness.
2Loss of energy
If the size of the register box is increased to accommodate thicker insulation, then thermal resistance is improved, but the box becomes costly and reduces available operable locations
Solution Approach 1:
By using composite insulation materials, the patent achieves high thermal resistance without increasing the physical dimensions of the transition box. This allows standard-sized boxes to be manufactured and installed in existing locations without modification, reducing costs and maintaining installation flexibility.
3Volume of moving object
If mineral wool insulation is compressed to fit within the transition box, then the insulation fits within standard size, but the R value is reduced and sufficient insulation is not provided
Solution Approach 1:
The patent uses a composite insulation system where the reflective layer provides thermal resistance without occupying significant volume. This allows the mineral wool layer to maintain its uncompressed thickness and R value while the overall insulation assembly remains thin enough to fit within standard transition boxes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for increased thermal resistance meeting industry standards while allowing installation in smaller spaces, reducing material costs and improving indoor air quality by minimizing exposed mineral wool, thus enhancing energy efficiency and extending the useful life of the transition box.
Implementation Method 1
a reflective laminate layer having a second R value overlies the mineral wool layer
Implementation Method 2
A mineral wool layer having a first R value is adjacent the inside surface of the box
Data Source
AI summary
An insulated HVAC duct component such as a transition box includes a first insulation layer and a second, different insulation layer. The transition box includes at least four sidewalls and one of a top and a back wall, the transition box further including a first access port and a second access port, the first access port having a different cross section than the second access port, one of the access ports being spaced from a nearest sidewall by less than 2 inches. The first insulation layer is located along an inside surface of the box. The second different insulation layer overlies the first insulation layer, the second different insulation layer having an air impervious surface, wherein the combined thickness of the first insulation layer and the second different insulation layer is less than 2 inches.