Centrifugal Fan Magnetic Gap Control for Thin Indoor AC Units
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Solution Overview
Problem
Indoor air conditioner devices face challenges in reducing side surface thickness due to vibration and noise caused by the tilt phenomenon of centrifugal fans when mounted on walls, as the gap between the fan and the orifice panel is limited by the separation between the rotational and gravitational centers of the motor and fan.
Innovation Solution
The implementation of magnetic substances with the same polarity at opposite positions on the heat exchanger panel and centrifugal fan surfaces generates a repulsive force, maintaining a constant gap and reducing vibration and noise by preventing the tilt phenomenon and allowing for a thinner design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the gap between the fan and orifice panel is reduced to decrease side surface thickness, then the device size is reduced, but vibration and noise increase due to fan tilt phenomenon
Solution Approach 1:
The patent applies the anti-weight principle by using magnetic substances to generate a counteracting magnetic force that opposes the gravitational force causing fan tilt. The magnetic substances are positioned on the fan and panel to create a magnetic field that counterbalances the weight-induced tilt, allowing the fan to maintain proper orientation even at reduced gaps, thereby eliminating vibration and noise while achieving thinner device dimensions.
2Object-generated harmful factors
If magnetic substances are added to prevent fan tilt, then vibration and noise are reduced, but device complexity increases
Solution Approach 1:
The patent merges the magnetic substances directly into the existing fan and panel structures, integrating the vibration reduction function into the conventional components rather than adding separate mechanical support systems. This integration approach minimizes additional complexity while achieving the desired vibration and noise reduction through the magnetic field interaction.
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 solution effectively reduces the side surface thickness of the indoor air conditioner unit while minimizing vibration and noise during fan operation, ensuring the fan remains vertical and does not collide with the panel or case.
Implementation Method 1
magnetic substances with the same polarity at opposite positions on the heat exchanger panel and centrifugal fan surfaces generates a repulsive force
Implementation Method 2
maintaining a constant gap and reducing vibration and noise by preventing the tilt phenomenon and allowing for a thinner design
Implementation Method 3
maintaining a constant gap and reducing vibration and noise by preventing the tilt phenomenon
Data Source
AI summary
An indoor device for an air conditioner is provided. The indoor device may include a heat exchanger mounting panel in which an orifice to pass air therethrough is formed, a centrifugal fan to inhale air in a shaft direction through the orifice and discharge the air in a radial direction, a motor to rotate the centrifugal fan, and a case to fix the motor and couple the motor to the panel. A first magnetic substance and a second magnetic substance that generate a repulsive force may be respectively disposed at a first surface opposite to the centrifugal fan in the panel and a second surface opposite to the panel in the centrifugal fan. In the first magnetic substance and the second magnetic substance, the same pole may be formed in a concentric circle and different poles may be alternately formed in a radial direction.