Respiratory Humidifier Reservoir Heating With Conductive Plastic
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Solution Overview
Problem
Resistive metallic heating plates used in respiratory humidifiers face challenges such as high material costs, difficulty in molding into desired shapes, and suboptimal electrical and thermal conductivity, which can affect their integration and aesthetics in humidification systems.
Innovation Solution
A respiratory humidifier system utilizing an electrically conductive plastic (ECP) material for the heater, which can be molded into various shapes and forms, including a base or reservoir, to promote differential heating with variable thickness and wireless connectivity, offering improved conductivity and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a resistive metallic heating plate is used in a humidification chamber, then heating function is achieved, but material cost increases and manufacturing difficulty increases
Solution Approach 1:
The patent changes the material parameter from traditional metal to electrically conductive plastic, which maintains the necessary electrical conductivity for resistive heating while dramatically improving ease of manufacture through molding capabilities and reducing material costs
Solution Approach 2:
The patent uses composite materials by incorporating conductive fillers into plastic matrix to create electrically conductive plastic that combines the electrical properties needed for heating with the manufacturing advantages of plastic materials
2Temperature
If a resistive metallic heating plate is used, then heating function is achieved, but electrical and thermal conductivity becomes suboptimal
Solution Approach 1:
The patent employs composite materials with conductive fillers embedded in plastic to achieve optimal electrical and thermal conductivity for efficient resistive heating, overcoming the limitations of both pure plastic and traditional metal solutions
3Temperature
If a resistive metallic heating plate is used, then heating function is achieved, but integration and aesthetics are compromised
Solution Approach 1:
The patent changes the material form from rigid metal plates to moldable electrically conductive plastic, enabling seamless integration into humidification chambers and reservoirs with varied shapes and aesthetically pleasing designs
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 ECP material enables efficient heating and humidification of gases, enhancing the performance and cost-effectiveness of respiratory therapy systems while allowing for easier integration and aesthetically pleasing designs.
Implementation Method 1
The heater may be configured to promote differential heating of liquid in the reservoir. The heater may have a variable thickness along its length and/or width.
Implementation Method 2
The heater may be configured to promote differential heating of liquid in the reservoir... to encourage liquid entrainment in the gas flow
Data Source
AI summary
An electrically conductive plastic (ECP) material can be used to heat water in a reservoir of a respiratory humidifier to encourage heating and/or humidification of gases passing through the respiratory humidifier. The electrically conductive plastic material can at least in part overmould the base and/or walls of the chamber and/or the reservoir of the respiratory humidifier. The reservoir can also partially or fully be formed from the electrically conductive plastic material. Furthermore, the humidification system can be configured to create substantially equal or differential heating of water in the reservoir.