Chamber Adaptor Temperature Sensing with Thermal Isolation
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Solution Overview
Problem
Existing respiratory humidifiers in high flow oxygen therapy systems lack accurate temperature detection of gases due to factors such as sensing apparatus failures and heat transfer from the housing, leading to detection errors.
Innovation Solution
A chamber adaptor with a control circuit and sensing apparatus, such as a thermistor probe, is integrated to detect gas temperature accurately by minimizing heat transfer from the housing and using an S-shaped connecting wire to reduce thermal conductivity, ensuring reliable temperature feedback to the main board device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensing apparatus is integrated into the chamber adaptor housing, then temperature detection function is achieved, but heat transfer from the housing causes detection errors
Solution Approach 1:
The patent introduces a thermal insulation layer as an intermediary substance between the sensing apparatus and the housing. This insulation layer acts as a thermal barrier that blocks heat transfer from the housing to the sensing apparatus, thereby eliminating the harmful thermal interference while preserving the temperature detection function.
Solution Approach 2:
The patent extracts the sensing apparatus from direct contact with the housing by positioning it within a dedicated detection cavity. This separation removes the harmful thermal influence from the housing while maintaining the functional integration of the sensing apparatus in the chamber adaptor system.
2Measurement precision
If the sensing apparatus is placed close to the gas outlet for accurate detection, then measurement precision improves, but the risk of single-point failure increases
Solution Approach 1:
The patent divides the detection system into multiple independent sensing apparatuses positioned at different locations within the detection cavity. This segmentation ensures that if one sensing apparatus fails, the others can still perform temperature detection, thereby improving system reliability while maintaining measurement precision through the combined output of multiple sensors.
3Device complexity
If the connecting wire is arranged in a straight line, then device complexity is reduced, but thermal conductivity increases causing detection errors
Solution Approach 1:
The patent configures the connecting wire in an S-shaped curved path rather than a straight line. This curvature increases the thermal resistance of the connecting wire by lengthening the thermal conduction path, thereby reducing thermal interference with the sensing apparatus while maintaining electrical connectivity and system functionality.
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
Enhances the accuracy of gas temperature detection, preventing single-point failures and reducing errors, thereby optimizing the delivery of suitable temperature and humidity to patients.
Implementation Method 1
the at least one sensing apparatus is a thermistor probe
Implementation Method 2
using an S-shaped connecting wire to reduce thermal conductivity
Data Source
AI summary
A manufacturing method of a chamber adaptor, where the chamber adaptor includes: a housing provided with a gas inlet, a gas outlet, a chamber inlet, and a chamber outlet, where the gas inlet is configured to be removably connected to a main board device, the gas outlet is configured to be removably connected to a respiratory pathway, the chamber inlet is configured to be removably connected to an input end of a chamber for storing liquid and the chamber outlet is configured to be removably connected to an output end of the chamber, the chamber adaptor further includes a control circuit and at least one sensing apparatus, where the at least one sensing apparatus is arranged on one end of the control circuit closer to the gas outlet and extends into a gas output channel.