Ceiling Air Conditioner Fan Cooling Passage for Uniform Airflow
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Solution Overview
Problem
Ceiling type air conditioners face issues with non-uniform air flow rates through the heat exchanger, leading to turbulence, noise, and reduced performance due to uneven wind speeds at the upper and lower portions, and inadequate cooling of the motor due to narrow or wide cooling passages.
Innovation Solution
The design includes a cooling passage with a flow part and a panel installation part to adjust air flow, ensuring uniform wind speeds through the heat exchanger and sufficient cooling of the fan motor by optimizing the width of the cooling passage and using adjustable panels to minimize turbulence and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the cooling passage has a wide width, then the motor cooling is improved, but air turbulence and noise increase
Solution Approach 1:
The cooling passage is divided into multiple separate passages (first cooling passage and second cooling passage) that are spaced apart. This segmentation allows each passage to have optimized dimensions for cooling efficiency while preventing air turbulence that would occur in a single wide passage, thereby reducing noise generation.
Solution Approach 2:
The cooling passages are positioned at specific locations with optimized width and spacing to provide localized cooling where needed. The passages are configured with specific dimensional parameters (width, spacing) that are optimized for both cooling performance and noise reduction, applying local quality improvements rather than uniform design.
2Object-generated harmful factors
If the cooling passage has a narrow width, then noise is reduced, but motor cooling efficiency deteriorates
Solution Approach 1:
Instead of using a single narrow passage that would be insufficient for cooling, the system uses multiple narrower passages spaced apart. This maintains the low-turbulence advantage of narrow passages while collectively providing sufficient cooling capacity through the combined effect of multiple passages.
Solution Approach 2:
The cooling solution transitions from a single-dimension approach (one wide passage) to a multi-dimensional arrangement (multiple passages spaced in three-dimensional space). This allows the system to achieve cooling efficiency through the cumulative effect of multiple passages while maintaining the low-noise characteristics of narrower individual passages.
3Adaptability or versatility
If the turbo fan is fixed to the upper end, then the ceiling mounting is enabled, but non-uniform air flow rates through the heat exchanger occur
Solution Approach 1:
The heat exchanger is designed with different structures for its upper and lower portions to compensate for the non-uniform air flow caused by ceiling mounting. The upper portion and lower portion have optimized configurations that account for the different wind speeds, ensuring uniform heat exchange performance across the entire heat exchanger despite the fixed turbo fan position.
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 design achieves uniform air flow through the heat exchanger, reducing noise and improving the performance of the ceiling type air conditioner by ensuring adequate cooling of the fan motor and optimizing air distribution, thereby enhancing overall operational efficiency.
Implementation Method 1
a cooling passage cooling the fan motor is defined between the main plate and the bottom surface of the case
Implementation Method 2
the suctioned air is heat-exchanged by a heat exchanger disposed within the ceiling type air conditioner
Data Source
AI summary
A ceiling type air conditioner includes a case defining an outer appearance, a fan disposed to a bottom of the case, a turbo fan disposed within the case, the turbo fan including a main plate rotated by power provided from the fan motor and a blade having a side connected to the main plate, and a heat exchanger disposed outside the turbo fan. A cooling passage cooling the fan motor is defined between the main plate and the bottom surface of the case. The cooling passage includes a flow part through which air passing through the blade flows into the flow part toward the fan motor, and a panel installation part to which a panel is installed for adjusting an amount of air flowing into the flow part toward the fan motor.