Warm Sensation Calculation Using Blood Flow Heat Transfer Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing warm sensation calculation methods struggle to accurately represent human body warmth during transitional environmental changes or when a person enters or exits an adjusted environment, leading to reduced accuracy in assessing overall and partial body warmth sensations.
Innovation Solution
A warm sensation calculation apparatus and method that incorporates a calculator for basic indices using a human body heat model, with a corrector that adjusts these indices based on heat transfer amounts due to blood flow, whole body heat storage, and average body temperature to improve accuracy during transitions, reflecting both heat inflow and outflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a basic index indicating warm sensation is calculated using only a human body heat model, then the calculation is simple, but the accuracy is reduced during transitional environmental changes
Solution Approach 1:
The patent segments the warm sensation calculation into two distinct components: a basic index calculated from a human body heat model and a correction value calculated from a transition state model. This segmentation allows each component to handle specific aspects of the calculation, improving overall accuracy without requiring the entire system to be overly complex.
Solution Approach 2:
The patent performs preliminary calculation of the basic index using the human body heat model before applying the correction value. This preliminary action establishes a baseline warm sensation measurement that can then be adjusted based on transition state conditions, ensuring accurate representation during environmental changes.
2Measurement precision
If correction elements are added to represent heat inflow and outflow during transitions, then the warm sensation representation improves, but the calculation complexity increases
Solution Approach 1:
The patent extracts the transition state effects (heat inflow and outflow) as separate correction elements from the basic human body heat model. By taking out these specific transitional effects and calculating them independently, the system can accurately represent warm sensation during transitions without requiring a complete redesign of the base model.
Solution Approach 2:
The correction value acts as an intermediary between the basic index and the final warm sensation representation. It mediates the effect of transition state conditions by adding or subtracting from the basic index based on calculated heat inflow and outflow, thereby improving accuracy during transitions without directly modifying the fundamental human body heat model.
3Ease of operation
If the calculation model is simplified for ease of use, then the operation is easier, but the ability to represent partial body warm sensation during transitions deteriorates
Solution Approach 1:
The patent introduces dynamic adjustment to the calculation model by incorporating correction values that adapt to transition state conditions. The model dynamically adjusts the warm sensation representation based on whether the system is in a steady state or transition state, allowing it to maintain simplicity during normal operation while improving accuracy during transitions.
Solution Approach 2:
The patent changes key parameters (adding correction values for heat inflow and outflow) only when transition conditions are detected. This parameter change approach allows the system to remain simple and easy to operate during steady states while automatically enhancing its representational capability during transitions without requiring a completely different calculation method.
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 approach enhances the representation and accuracy of warm sensations across the human body and its parts during transitions, allowing for more precise comfort assessment and improved air conditioning control.
Implementation Method 1
heat transfer amount due to a blood flow of a human body heat model
Implementation Method 2
heat transfer amount due to a blood flow of a human body heat model
Implementation Method 3
whole body heat storage amount (Sb) and an average body temperature (Tb) due to heat storage of the human body heat model
Data Source
AI summary
A warmth calculation apparatus capable of indicating warmth during a transition is provided. This warmth calculation apparatus includes: a calculator that, on the basis of a human body heat model simulating a human body, calculates a basic index indicating the warm sensation of parts of the human body under inputted environmental conditions; and a corrector that corrects the basic index utilizing, as a correction element, a heat transfer amount caused by blood flow of the human body heat model.