PCM Carrying Case for Instrument Temperature Stabilization
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Solution Overview
Problem
Musical instruments, particularly those made of wood, are prone to cracking due to sudden temperature changes during transport, leading to costly damage and potential irreversibility, as existing carrying cases fail to effectively stabilize temperature environments.
Innovation Solution
A carrying case with a phase change material (PCM) layer and thermal insulation, designed to maintain a temperature range between 50° F. and 75° F., providing a compact and reliable temperature-stabilized environment without active thermal control or bulky insulation, and optionally including a low emissivity layer and water-resistant fabric.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hard cases with fabric covers are used, then instruments are protected from shock and handling, but they fail to prevent temperature changes that cause cracking
Solution Approach 1:
The patent combines phase change material (PCM) with thermal insulation materials to create a composite case structure. The PCM layer (containing materials like paraffin or salt hydrates) is integrated with insulating layers (such as foam or fibrous materials) to form a multi-layer composite structure that simultaneously provides temperature stabilization and thermal insulation, effectively preventing temperature-induced cracking while maintaining case simplicity.
Solution Approach 2:
The patent utilizes the phase transition properties of specific materials (such as paraffin, salt hydrates like sodium acetate or calcium chloride) that melt and freeze at desired temperature ranges. These phase change materials absorb excess heat when melting and release heat when freezing, actively stabilizing the internal temperature of the case to prevent instrument cracking during temperature transitions.
2Temperature
If active thermal control systems are added, then temperature stability is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent employs passive thermal control through phase change materials that automatically regulate temperature without external control systems. The PCM autonomously absorbs or releases heat based on its phase transition properties, eliminating the need for batteries, heaters, sensors, or control electronics, thereby maintaining temperature stability while avoiding the complexity and cost of active thermal management systems.
Solution Approach 2:
The invention leverages the inherent phase transition characteristics of selected materials (paraffin, salt hydrates) that naturally maintain temperature within a specific range during phase change. This passive utilization of thermodynamic principles provides effective temperature stabilization without requiring any active control mechanisms, resolving the contradiction between temperature stability and system complexity.
3Reliability
If bulky insulation is used to maintain temperature, then temperature protection is improved, but portability and compactness are reduced
Solution Approach 1:
The patent creates a lightweight composite structure by integrating phase change material with thin thermal insulation layers. The PCM provides active temperature stabilization through phase transitions, allowing the use of thinner insulation layers compared to traditional designs, thereby reducing the overall weight and bulk of the case while maintaining effective temperature protection for musical instruments.
Solution Approach 2:
By utilizing the high latent heat of fusion of phase change materials, the invention achieves superior temperature protection with minimal material thickness. The PCM's ability to absorb and release large amounts of heat during phase transitions enables effective thermal protection without requiring bulky insulation, thus maintaining case portability and compactness.
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
The PCM layer absorbs and releases heat to maintain a constant temperature, significantly delaying temperature descent and humidity changes within the case, effectively protecting instruments from extreme temperatures and reducing the risk of cracking.
Implementation Method 1
A carrying case utilizes a layer of phase change materials and a thermal insulation layer in order to provide a temperature-stabilized environment for enclosed payloads during transport
Implementation Method 2
The PCM is designed to change phase at a temperature of between 50° F. and 75° F. The PCM layer absorbs and releases heat to maintain a constant temperature
Implementation Method 3
A carrying case utilizes a layer of phase change materials and a thermal insulation layer in order to provide a temperature-stabilized environment
Data Source
AI summary
A carrying case utilizes a layer of phase change materials and a thermal insulation layer in order to provide a temperature-stabilized environment for enclosed payloads such as musical instruments during transport through an environment in which temperatures differ greatly from those to which they are normally exposed. In one aspect, the phase change materials and thermal insulation provide an extended period of temperature constancy, without the addition of either active thermal control or excessively bulky insulation.