Ventilation Humidification Control for Stable Preheated Airflow
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Solution Overview
Problem
Existing ventilation therapy apparatuses face issues with temperature and humidity fluctuations during the pre-heating phase, leading to discomfort and potential respiratory damage when patients use them in environments outside specified conditions.
Innovation Solution
A humidification control system that includes a fan, heating plate, water tank, and heating pipeline, controlled by a first controller to maintain target humidity and temperature through real-time adjustments of heating power and airflow, ensuring stable evaporation rates and gas flow conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the humidifier is prompted not to be worn until pre-heating is complete, then the humidity and temperature stability is improved, but the patient cannot use the apparatus immediately after startup
Solution Approach 1:
The system performs preliminary heating of the water tank and humidification components before actual use, ensuring that the water is pre-heated to the required temperature and humidity levels are achieved in advance, allowing immediate safe use without delay
Solution Approach 2:
The system continuously monitors the temperature and humidity of the gas flow and provides feedback to the control unit, which automatically adjusts the heating power and fan speed to maintain stable conditions, enabling immediate use while ensuring safety
2Adaptability or versatility
If the humidifier operates in environments beyond reasonable conditions, then the adaptability is improved, but the temperature and humidity control reliability deteriorates
Solution Approach 1:
The system dynamically adjusts the heating power and fan speed based on real-time temperature and humidity measurements and environmental conditions, allowing it to adapt to various environments while maintaining reliable control through continuous feedback and automatic adjustment
Solution Approach 2:
The system changes operational parameters such as heating power level and airflow rate based on detected environmental conditions, enabling it to operate reliably in environments beyond the specified range by adjusting parameters to compensate for extreme conditions
3Productivity
If the water tank is pre-heated to high temperature, then the evaporation rate is improved, but the energy consumption increases
Solution Approach 1:
The system uses periodic heating cycles rather than continuous high-power heating, where the heating element is activated in intervals to achieve the required water temperature and evaporation rate, reducing overall energy consumption while maintaining adequate productivity
Solution Approach 2:
The system optimizes the heating power parameter based on the actual temperature difference required and environmental conditions, using higher power only when necessary and lower power during maintenance phases, thereby reducing energy consumption while maintaining adequate evaporation rate
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
Ensures consistent delivery of gas at target temperature and humidity, providing patient comfort and preventing respiratory issues even in non-ideal environmental conditions.
Implementation Method 1
the water used for humidification has not absorbed sufficient heat yet, therefore the humidifier cannot evaporate sufficient water vapor immediately
Implementation Method 2
the heating pipeline includes a gas-inlet temperature sensor of the heating pipe and a heating controlling module of the heating pipeline
Data Source
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AI summary
Disclosed are a humidification control system and method for a ventilation therapy apparatus. The humidification control system comprises a ventilation therapy apparatus main body, a respiratory humidifier, a heating pipeline and a nasal oxygen cannula, wherein the ventilation therapy apparatus main body comprises a fan and a first controller, the respiratory humidifier comprises a water tank, a heating plate, a water tank air inlet temperature sensor and a heating plate temperature sensor, an air outlet of the fan is connected to an air inlet of the water tank; an air outlet of the water tank is connected to an air inlet of the heating pipeline; an air outlet of the water tank is connected to an input port of the nasal oxygen cannula; the heating pipeline comprises a heating pipeline air inlet temperature sensor and a heating pipeline heating control module; and the first controller makes the relative humidity of the current first mixed airflow, which is obtained after water vapor in the water tank is mixed with air input by the fan, be a target humidity. According to the control method, the airflow inhaled by a patient is a mixed airflow conforming to a target temperature and a target humidity, such that the comfort of the patient is guaranteed.