Air Purifier Top Cover Venting for Electronics Cooling
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Solution Overview
Problem
Existing air purifiers with motorized fan assemblies and filter media do not effectively manage the thermal dissipation of heat generated by electric circuits, such as wireless charging coils, leading to reduced charging efficiency and potential overheating.
Innovation Solution
Integrating a hollow top cover with vents into the air purifier design to divert a portion of the filtered airstream for active cooling of electric circuits, utilizing the airflow to transfer heat away from the circuits and exhaust it into the ambient environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If passive thermal dissipation methods are used for cooling electric circuits, then device complexity is reduced, but cooling efficiency and thermal dissipation rate are insufficient
Solution Approach 1:
The patent combines the air purifier's existing filtered air output with the cooling function for wireless charging coils. The hollow top cover integrates both air discharge and cooling airflow generation, merging two functions into one structure. This eliminates the need for separate cooling mechanisms while achieving active cooling of the electric circuit.
Solution Approach 2:
The filtered air stream serves multiple purposes: it functions as both the air purifier's discharge output and as the cooling airflow for the wireless charging coils. The hollow top cover is designed to perform both primary air discharge and secondary cooling airflow generation, demonstrating multi-functionality that resolves the contradiction between simplicity and cooling efficiency.
2Loss of energy
If active cooling with separate cooling mechanisms is implemented, then cooling efficiency improves, but device complexity and cost increase
Solution Approach 1:
The patent merges the air purifier's main airflow system with the cooling system for wireless charging coils. The hollow top cover integrates both functions, using the same filtered air stream for both air discharge and cooling purposes. This eliminates the need for separate cooling mechanisms like fans or heat sinks, achieving active cooling without increasing device complexity.
Solution Approach 2:
The system uses its own filtered air output to cool the wireless charging coils, making the cooling mechanism self-service. The air purifier's main function generates the cooling airflow needed for the electric circuit, eliminating the need for external or separate cooling systems.
3Productivity
If high power wireless charging is implemented, then charging speed improves, but heat generation and thermal management challenges increase
Solution Approach 1:
The patent ensures continuous cooling of the wireless charging coils during operation by maintaining a constant flow of filtered air through the hollow top cover. The cooling airflow is generated continuously as long as the air purifier is operating, providing ongoing thermal management that enables sustained high-power charging without excessive temperature buildup.
Solution Approach 2:
The patent uses pneumatic flow (filtered air) to cool the wireless charging coils. The hollow top cover directs the air stream to flow around the coils, using the kinetic energy and convective heat transfer properties of the moving air to remove heat from the circuit, enabling high-power operation with effective thermal management.
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 thermal dissipation of electric circuits, allowing for faster and higher-power charging without the need for passive cooling mechanisms like heat sinks, while maintaining airflow efficiency.
Implementation Method 1
a motorized fan assembly and filter media. When the motorized fan assembly is energized, fan blades are caused to rotate at a high rate of speed to draw ambient airflow into the housing. The airflow passes through an internal volume of the housing where it is filtered through one or more layers or types of filter media.
Implementation Method 2
A portion of the filtered airstream is admitted through vents into the hollow top cover to function as a cooling airflow, whereupon the cooling airflow circulates around the electric circuit. Heat is transferred from the electric circuit to the cooling airflow and ultimately exhausted to the surrounding ambient environment.
Implementation Method 3
a wireless charging circuit employs tightly wound copper loops or coils that radiate waste heat as a byproduct of the electromagnetic induction process
Data Source
AI summary
An air purifier includes a housing having a vented upper surface, a motorized fan assembly positioned within an interior volume of the housing and operable for discharging a filtered airstream through the vented upper surface, a hollow top cover, and an electric circuit, e.g., wireless charging electronics. The hollow top cover at least partially defines therein an electronics bay, floor vents configured to admit a portion of the filtered airstream into the electronics bay as a cooling airstream, at least one primary exhaust port for discharging the filtered airstream to a surrounding ambient environment, and at least one secondary exhaust port for discharging the cooling airstream to the surrounding ambient environment. The electric circuit is positioned in the electronics bay within the cooling airstream.