Reversible Blower and Damper Venting for Filtered Airflow Modes
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Solution Overview
Problem
Air purifiers with fan functions face challenges in achieving sufficient blowing capacity due to flow resistance from purification filters, leading to increased size and energy consumption.
Innovation Solution
The design incorporates a blower capable of forward/reverse rotation, a third air vent that opens/closes to reduce flow resistance, and a damper system to manage airflow direction between air blowing and purification modes, allowing for efficient airflow in both modes without increasing blower capacity or energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air purifier uses purification filter to remove pollutants, then air purification effectiveness is improved, but flow resistance increases reducing blowing capacity
Solution Approach 1:
The air vent system is segmented into multiple independent vents (first air vent, second air vent, third air vent) that can be selectively opened or closed. The damper divides the air vent into a first air vent and a second air vent, enabling independent control of airflow paths. This segmentation allows the system to optimize for either purification or blowing capacity by selecting which vents are active.
Solution Approach 2:
The damper mechanism dynamically adjusts the opening/closing state of air vents based on operational mode. The controller adjusts the opening degree of the damper according to the operation mode (air blowing mode or air purification mode), enabling the system to adapt its airflow characteristics in real-time to resolve the contradiction between purification effectiveness and blowing capacity.
2Productivity
If blower capacity is increased to maintain sufficient blowing performance, then blowing capacity is improved, but device size and energy consumption increase
Solution Approach 1:
The system uses dynamic control of the damper and selective opening/closing of air vents to optimize airflow paths based on operational mode. This dynamic adjustment allows a smaller blower to achieve sufficient blowing capacity by reducing flow resistance through strategic vent configuration, eliminating the need for oversized blowers that would increase device size and energy consumption.
Solution Approach 2:
The system changes operational parameters (which vents are open/closed, damper opening degree) to optimize performance. By changing the configuration of open vents and damper position, the system achieves high blowing capacity with a compact blower, avoiding the need for large blower capacity that would increase device size.
3Productivity
If blower capacity is increased to maintain sufficient blowing performance, then blowing capacity is improved, but energy consumption increases
Solution Approach 1:
The dynamic damper control and selective vent opening/closing reduce flow resistance in the air blowing mode, allowing a smaller energy-consuming blower to achieve the same blowing capacity. By optimizing the airflow path dynamically, the system minimizes the energy required for blowing while maintaining sufficient blowing performance.
Solution Approach 2:
By changing the operational parameters (damper opening degree, which vents are active), the system optimizes energy efficiency. The parameter changes enable sufficient blowing capacity with reduced energy consumption by minimizing flow resistance through strategic vent configuration.
4Productivity
If damper opens third air vent to reduce flow resistance, then blowing capacity is improved, but air loss occurs in purification mode
Solution Approach 1:
The damper dynamically switches between opening and closing the third air vent based on operational mode. In air blowing mode, the damper opens the third air vent to reduce flow resistance and improve blowing capacity. In air purification mode, the damper closes the third air vent to prevent air loss and ensure all air passes through the purification filter. This dynamic switching resolves the contradiction between blowing capacity and air loss prevention.
Solution Approach 2:
The air vent system is segmented into multiple independent vents that can be selectively activated. The third air vent is specifically controlled by the damper for blowing operations, while other vents handle purification operations. This segmentation allows the system to optimize for blowing capacity when needed without compromising purification effectiveness, preventing air loss by keeping the third vent closed during purification mode.
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
This configuration enables a compact air purifier to maintain sufficient blowing capacity in air blowing mode while ensuring effective air purification without air loss in purification mode, reducing energy consumption and maintaining a compact size.
Implementation Method 1
a blower which selectively supplies air in a first direction and a second direction opposite to the first direction based on forward/reverse rotation
Implementation Method 2
a damper which opens/closes the third air vent
Implementation Method 3
a purification filter to remove pollutants
Data Source
AI summary
An air purifier includes a blower which selectively supplies air in a first direction and a second direction based on forward/reverse rotation, a first air vent located on the first direction side of the blower, a second air vent located on the second direction side of the blower, a purification filter located on an upstream side of the second air vent based on the second direction, a third air vent located on an upstream side of the blower based on the first direction, and a damper which opens/closes the third air vent.