Anti-Fog Heat Generating Glass with Dew Point Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional heat generating glass systems maintain a constant surface temperature, leading to unnecessary power consumption and condensation on glass surfaces, especially in winter due to temperature differences between indoor and outdoor environments.
Innovation Solution
An anti-fog heat generating glass system that includes a glass surface temperature detector, a controller to compare the surface temperature with the dew point, and a power source to supply electricity only when the surface temperature is less than or equal to the dew point, thereby controlling heat generation and preventing condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the heat generating glass sheet maintains a constant surface temperature, then condensation is prevented, but power consumption increases unnecessarily
Solution Approach 1:
The system dynamically adjusts the heat generation state of the glass sheet based on real-time temperature and humidity sensing. Instead of maintaining constant temperature, the system transitions between heated and unheated states based on whether the glass surface temperature is at or below the dew point, making the system adaptive to changing environmental conditions.
Solution Approach 2:
The system changes the operational parameter (heat generation state) based on environmental parameters (temperature and humidity). By calculating the dew point from sensed temperature and humidity, the system determines when heating is necessary and adjusts the glass sheet's thermal state accordingly, optimizing energy usage while preventing condensation.
2Illumination intensity
If the heat generating glass sheet operates continuously, then visibility is maintained, but energy waste occurs
Solution Approach 1:
The system employs feedback control by continuously sensing the glass surface temperature and indoor humidity, comparing the actual temperature against the calculated dew point, and adjusting heat generation accordingly. This closed-loop feedback mechanism ensures heating occurs only when necessary to maintain visibility, eliminating continuous operation and associated energy waste.
Solution Approach 2:
Instead of continuous operation, the system implements periodic heating cycles triggered by environmental conditions. The glass sheet is heated periodically only when the temperature-humidity conditions indicate risk of condensation (when glass surface temperature ≤ dew point), creating an on-demand periodic action pattern rather than continuous operation.
3Use of energy by moving object
If the system uses automatic control based on temperature and humidity sensing, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The system performs self-service by automatically sensing environmental conditions, calculating the dew point, determining when heating is needed, and controlling the heat generation without user intervention. The system serves itself by integrating the sensing, calculation, decision-making, and actuation functions into an autonomous control loop, reducing the need for manual operation while managing complexity through automation.
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 system effectively prevents condensation on glass surfaces while minimizing power consumption by only generating heat when necessary, maintaining visibility and preventing mold growth.
Implementation Method 1
electric power to be supplied to a heat generating glass sheet so as to generate heat
Data Source
AI summary
An anti-fog heat-generating glass system, comprising: a heat-generating glass unit separating an indoor and outdoor area, including general glass and heat-generating glass; a glass surface temperature-sensing unit arranged on indoor side heat-generating glass for sensing glass surface temperature; a control unit which compares the glass surface temperature and a fogging point of the indoor area to control heat-generation of the heat-generating glass unit; and a power-source unit supplying power to the heat-generating glass system to operate the system. A method for controlling the anti-fog heat-generating glass system comprises: simultaneously sensing the temperature and relative humidity of the indoor area and the temperature of the heat-generating glass surface; calculating a fogging point based on the temperature and relative humidity of the indoor area; comparing the temperatures of the heat-generating glass surface and the fogging point; and returning to the sensing step or heating the heat-generating glass, based on the comparing step.