Vacuum Insulation Panel Indicator for Remote Vacuum Loss Detection
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Solution Overview
Problem
Vacuum insulation panels (VIPs) lose a substantial portion of their insulating value when the vacuum inside the panel is compromised, but moderate losses in vacuum are not easily detectable with the naked eye, necessitating an inexpensive and reliable method to indicate when a VIP has failed.
Innovation Solution
A remotely interrogatable pressure transition indicator comprising a pressure sensitive element and a mechanical switch, such as an RFID or magnetic switch, that transitions between states based on external pressure changes, allowing for quick and reliable detection of vacuum loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual inspection is used to detect VIP failure, then fully compromised VIPs can be detected, but moderate vacuum losses cannot be detected
Solution Approach 1:
The patent replaces visual inspection (mechanical/optical system) with a pressure-sensitive electronic indicator system. The pressure-sensitive element detects pressure changes through mechanical deformation, which is then converted to an electrical signal by the RFID or magnetic switch, enabling detection of moderate vacuum losses that are invisible to the naked eye.
Solution Approach 2:
The patent introduces a pressure-sensitive element as an intermediary between the vacuum environment and the detection system. This element translates pressure changes into mechanical deformation, which then activates the RFID or magnetic switch, providing an indirect but reliable detection method for vacuum integrity.
2Ease of manufacture
If an inexpensive detection device is used, then cost is reduced, but detection reliability may be compromised
Solution Approach 1:
The patent employs inexpensive RFID tags or magnetic switches that can be easily manufactured and integrated into VIPs. These indicators are designed to be replaceable and cost-effective, providing reliable detection without requiring expensive complex systems. The simplicity of the components maintains low cost while ensuring detection reliability through their direct response to pressure changes.
3Productivity
If remote interrogation capability is added to the indicator, then detection speed is improved, but device complexity increases
Solution Approach 1:
The patent replaces manual inspection methods with remote interrogation capability using RFID or magnetic switching. The RFID tag or magnetic switch can be remotely activated and read without physical contact, enabling rapid detection of multiple VIPs simultaneously and significantly improving detection speed while maintaining relatively simple device architecture.
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 indicator effectively signals the condition of the vacuum within a VIP, enabling timely replacement and maintaining thermal insulation performance.
Implementation Method 1
a pressure sensitive element operable for transitioning between first and second conditions in response to a pressure differential between an internal pressure of the pressure sensitive element and an external pressure
Implementation Method 2
The first condition of the pressure sensitive element is an inflated condition caused when the sachet experiences an external pressure lower than the set pressure, and the second condition of the pressure sensitive element is a compressed condition caused when the sachet experiences an external pressure higher than the set pressure
Implementation Method 3
The remotely interrogatable mechanical switch is operable for transitioning between (i) a first state producing a first interrogatable value wherein the first state is indicative of a pressure induced status of the pressure sensitive element
Implementation Method 4
A preferred pressure sensitive element is a hermetically sealed, gas impermeable, flexible walled sachet containing a quantity of gas at a set pressure
Data Source
AI summary
A remotely interrogatable pressure transition indicator (100) having a pressure sensitive element (110) interacting with a remotely interrogatable mechanical switch (120). The pressure sensitive element (110) is a hermetically sealed, gas impermeable, flexible walled sachet (110) containing a quantity of gas, operable for transitioning between inflated and deflated conditions induced by a change in external gaseous pressure experienced by the sachet (110). The sachet (110) interacts with the mechanical switch (120) to producing a first interrogatable value when the sachet (110) is inflated and a second interrogatable value when the sachet (110) is deflated.