HVAC Enclosure Wall Structure With Thermoplastic Thermal Breaks
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Solution Overview
Problem
Existing HVAC enclosure structures face inefficiencies in thermal insulation due to heat energy transmission from the interior to the exterior through fasteners and supports, compromising the strength-to-weight ratio and insulating properties.
Innovation Solution
The use of thermoplastic standoffs to create a dead air space between the exterior and interior walls, preventing metal-to-metal contact and utilizing selected thermoplastic profiles for versatile mounting, thereby enhancing thermal insulation while maintaining structural integrity and lightweight characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If aluminum sheets are used to form the enclosure, then the strength-to-weight ratio is improved, but thermal insulating properties deteriorate
Solution Approach 1:
The patent employs a composite construction combining aluminum panels with thermoplastic insulation material. The aluminum provides structural strength while the thermoplastic layer provides thermal insulation, creating a composite wall structure that achieves both mechanical strength and thermal insulation requirements simultaneously.
Solution Approach 2:
The thermoplastic standoffs act as intermediary elements between the aluminum panels, providing thermal breaks that prevent heat transmission through the metal structure. These standoffs mediate the connection between structural components while eliminating the thermal conduction path.
2Strength
If fasteners and supports are used to secure the enclosure, then structural integrity is improved, but thermal insulation deteriorates due to heat transmission through metal components
Solution Approach 1:
Thermoplastic standoffs serve as intermediary elements replacing direct metal-to-metal contact in the fastening system. These standoffs maintain the structural connection between panels while introducing thermal breaks that prevent heat transmission through the fastening points.
Solution Approach 2:
The patent extracts the thermal conduction path from the fastening system by removing direct metal-to-metal contact points. The fasteners are isolated from each other through thermoplastic standoffs, effectively taking out the harmful thermal transmission pathway while preserving structural function.
3Weight of moving object
If thin aluminum is used to maintain lightweight characteristics, then weight is reduced, but strength deteriorates
Solution Approach 1:
The patent creates a composite wall assembly where thin aluminum panels are combined with thermoplastic insulation and reinforcement structures. This composite approach allows the use of thinner, lighter aluminum while the combined structure provides the necessary overall strength and stiffness.
Solution Approach 2:
The patent addresses strength requirements by adding dimensional complexity through multi-layer construction and reinforcement elements rather than increasing aluminum thickness. The strength is achieved through the three-dimensional composite structure rather than relying solely on the two-dimensional aluminum sheet gauge.
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 solution significantly reduces thermal energy transmission, enhancing the insulating efficiency of HVAC enclosures by creating a dead air space and using thermoplastic standoffs to isolate the exterior from the interior, while maintaining high strength and low weight.
Implementation Method 1
a dead air space is created which enhances the thermal insulating properties of the completed structure
Implementation Method 2
the metallic fasteners which secure the exterior walls of the enclosure to the enclosure do not transmit thermal energy from the external wall to the internal wall
Data Source
AI summary
An improved wall structure for HVAC enclosures utilizing thermoplastic standoffs to form an air space and to separate the exterior wall structure of the enclosure from the interior wall structure. The position of the thermoplastic standoffs and the selection of the design for the standoffs insure that metallic fasteners would secure the exterior walls of the enclosure to the enclosure do not transmit thermal energy from the external wall to the internal wall.