Reflective Laminate HVAC Transition Box With Thin Composite Insulation
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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 reduces operable locations, and existing solutions either compress insulation to fit or require costly modifications.
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 with a combined thickness of less than 2 inches to achieve higher R values without the need for assembly by the installer, allowing installation in smaller spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the thickness of mineral wool insulation is increased to achieve higher R values, then thermal transfer resistance is improved, but the insulation cannot fit within standard size transition boxes
Solution Approach 1:
The patent combines mineral wool insulation with a reflective insulation layer to create a composite insulation system. The mineral wool provides bulk thermal resistance while the reflective layer adds additional R value through radiation reflection, achieving higher total R values without proportionally increasing overall thickness. This composite approach allows the insulation assembly to meet higher R value requirements while fitting within standard transition box dimensions.
Solution Approach 2:
The reflective insulation layer is implemented as a thin film or foil structure that provides significant thermal resistance through radiation reflection. This thin film approach adds R value without requiring substantial thickness, allowing the combined insulation system to achieve higher R values while maintaining a compact profile that fits within standard transition box spaces.
2Loss of energy
If the size of the register box is increased to accommodate thicker insulation, then thermal transfer resistance is improved, but the box becomes costly and reduces available operable locations
Solution Approach 1:
By using a composite insulation system combining mineral wool and reflective layer, the patent achieves higher R values within the existing transition box dimensions. This eliminates the need to manufacture larger or custom-sized boxes, maintaining standard production processes and reducing manufacturing costs while still meeting increased thermal performance requirements.
Solution Approach 2:
The patent changes the thermal performance parameters of the existing insulation system by adding a reflective layer, rather than changing the physical dimensions of the transition box. This parameter change approach allows higher R values to be achieved through material properties and configuration rather than through increased box size, maintaining compatibility with standard manufacturing and installation practices.
3Volume of moving object
If mineral wool insulation is compressed to fit within standard transition boxes, then the insulation fits within available space, but the R value is reduced and insufficient insulation is provided
Solution Approach 1:
The patent uses a composite system where the reflective insulation layer is added alongside the mineral wool rather than compressing the mineral wool alone. The reflective layer provides additional thermal resistance through radiation reflection, compensating for any reduction in mineral wool effectiveness due to compression, thereby maintaining adequate R values while fitting within standard box dimensions.
Solution Approach 2:
The reflective insulation layer acts as an intermediary that enhances the thermal performance of the compressed mineral wool. By placing the reflective layer in contact with the mineral wool, the system creates a combined insulation barrier that maintains effective R values even when the mineral wool is compressed to fit within space constraints.
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 provides enhanced resistance to thermal flow with a higher R value than traditional methods, allowing installation in previously inaccessible locations while maintaining standard box sizes and improving indoor air quality by minimizing exposed mineral wool.
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.