HVAC Indicator for Temperature and Fan Adjustments
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Solution Overview
Problem
Passengers in vehicles experience discomfort due to unexpected temperature differences and fan speed variations in HVAC systems, which current technologies fail to adequately address.
Innovation Solution
A vehicle HVAC system with a display and processor that calculates temperature differences between desired and actual conditions, providing indicators when these differences exceed a comfort threshold, allowing passengers to anticipate and prepare for potential discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the HVAC system pumps air at temperatures significantly different from the desired temperature to quickly adjust the vehicle interior temperature, then the temperature adjustment speed is improved, but passenger comfort deteriorates due to unexpected temperature differences
Solution Approach 1:
The system performs preliminary action by notifying passengers in advance about the temperature difference that will occur. The display shows the desired temperature, the actual air temperature being pumped, and the comfort assessment before the temperature adjustment fully takes effect, allowing passengers to mentally prepare for the upcoming temperature change.
Solution Approach 2:
The system implements feedback by continuously monitoring the temperature difference between desired and actual air temperatures, assessing comfort levels, and providing real-time visual feedback to passengers through the display. This feedback loop allows the system to inform passengers about the relationship between HVAC operations and their comfort experience.
2Adaptability or versatility
If the HVAC system uses variable fan speeds to adjust temperature, then the temperature control flexibility is improved, but passenger comfort deteriorates due to unexpected fan speed variations
Solution Approach 1:
The system applies preliminary action by displaying fan speed information and comfort assessments to passengers before the fan speed changes fully occur. This allows passengers to anticipate the variability in fan operation and understand the relationship between fan speed adjustments and their comfort experience.
Solution Approach 2:
The system provides feedback by showing passengers the current fan speed, the desired fan speed, and the comfort assessment related to fan speed variations. This continuous feedback helps passengers understand the system's adaptive behavior and reduces discomfort from unexpected changes.
3Device complexity
If the HVAC system does not provide information about temperature differences, then the system complexity is reduced, but passenger comfort deteriorates due to lack of awareness about upcoming temperature changes
Solution Approach 1:
The system introduces an intermediary element - a display interface - that mediates between the HVAC system's internal operations and the passenger's experience. The display translates complex temperature and fan speed data into understandable comfort assessments and notifications, bridging the gap between system operations and passenger awareness without requiring complex changes to the core HVAC mechanics.
Data Source
AI summary
This disclosure describes a system and method for displaying an indicator when temperature and fan adjustments occur which may cause passengers potential discomfort. Discomfort may be caused by deviations of expected air temperature, fan speed, or both. For example, when a desired temperature is set to seventy-two degrees Fahrenheit (72° F.), colder air at sixty degrees Fahrenheit (60° F.) may be used to bring down the temperature within the vehicle which may be at ninety degrees Fahrenheit (90° F.). The temperature difference between the desired temperature of seventy-two degrees Fahrenheit (72° F.) and the incoming air at sixty degrees Fahrenheit (60° F.) may be above a threshold comfort level, such as two degrees Fahrenheit (2° F.). When this happens, the system may provide the indicator to the passengers. Indicators for a fan speed may also be shown when discomfort may exist. Through these indicators, the passengers may recognize that the threshold for comfort has been exceeded.