Integrated Blower-Filter Assembly for Compact Fuel Cell Airflow
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Solution Overview
Problem
Conventional air filtration systems for fuel-consuming devices like fuel cells and fuel reformers are bulky, inadequate in protecting electronics from heat and contaminants, and complicate compact construction due to the need for physical separation from heat-producing elements.
Innovation Solution
A blower assembly with a dual-wall housing and integrated air intake conduit, using a series of centrifugal blowers and N95-certified filters to thermally isolate cool and hot zones, ensuring efficient airflow and protection from contaminants while maintaining compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional air filtration systems are used, then air intake is provided, but the systems are bulky and interfere with compact constructions
Solution Approach 1:
The air filter assembly is merged with the blower housing to form a single integrated unit. The filter elements are positioned within the blower housing structure, eliminating the need for separate filtration components and enabling compact construction while maintaining effective air intake and filtration functionality.
2Reliability
If physical separations are increased to protect electronics from heat, then electronics are protected, but device complexity and space requirements increase
Solution Approach 1:
A thermal barrier or heat shield is introduced as an intermediary element between the exothermic reactor and the electronic controls. This mediator allows the electronics to be positioned closer to the heat source while still providing adequate thermal protection, reducing the need for extensive physical separations and simplifying the overall device structure.
3Strength
If filter elements are deeply engaged with housing, then secure attachment is achieved, but filter replacement becomes difficult
Solution Approach 1:
The filter assembly incorporates a removable cover or access mechanism that allows the filter elements to be easily engaged and disengaged. The cover can be opened to provide access for filter replacement while maintaining secure attachment during operation, balancing the need for strong fixation with ease of maintenance.
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 solution effectively maintains separate thermal zones, protects electronics from heat and contaminants, and allows for compact, efficient operation of fuel-consuming devices by ensuring precise airflow control and filtration, enabling integration into inhabited environments.
Implementation Method 1
the airstream passes around the outside of the exothermic reactor or other exothermic device to thermally isolate the outside surface of the outside apparatus housing from the exothermic device contained therein
Implementation Method 2
the airstream of the air intake is used to cool the temperature of one, two or more cool zones of the apparatus so that heat sensitive components, such as electronics, are not damaged from heat produced by exothermic devices
Data Source
AI summary
The outlet of a blower extends through a hole in a circuit board to which the blower is attached. Electronics on the board control operation of the blower. The blower can be configured as two blowers in series, to provide more precise control of airflow. An air filter, such as an N95 filter is releasably attached to the blower intake on a front side of the circuit board. The front side of the board can be attached to a support panel, with a gap therebetween, and the air filter facing and in fluid communication with the gap. An air filter gasket is positioned around the edges of the front side of the circuit board, such that air sucked through the air filter over the intake of the blower, first passes through the air filter gasket between the circuit board and the support panel. The air filter gasket can be coarser than the air filter. The blower is well suited for use in a fuel cell apparatus, for supplying an electronically controlled airflow to the fuel cell.