Air conditioning indoor unit
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Solution Overview
Problem
Air conditioners initially blow cold air unevenly, causing discomfort, and once the room temperature stabilizes, the air may not reach occupants effectively, failing to provide a consistent cooling sensation.
Innovation Solution
An air conditioner indoor unit with a wind direction adjusting blade and a Coanda blade that changes the direction of conditioned air automatically, implementing upper airflow mode initially to reach all corners and switching to upward and downward wind direction mode when the room temperature stabilizes, utilizing the Coanda effect to direct air further and create a natural wind-like experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conditioned air is blown forward and downward with strong wind quantity to reach every corner of the room, then temperature distribution is improved, but the low temperature of conditioned air directly hits the occupant causing unpleasant feeling
Solution Approach 1:
The wind direction adjusting blade dynamically changes the blowout angle of conditioned air based on room temperature stability. During initial cooling, the blade directs air upward and forward to avoid hitting the occupant. When temperature stabilizes, the blade adjusts to direct air downward toward the occupant for cooling comfort, making the airflow direction adaptive rather than fixed
Solution Approach 2:
The control portion implements periodic switching between upper airflow mode and upward-downward wind direction mode based on temperature stability detection. This periodic action allows the system to alternate between prioritizing temperature distribution and prioritizing occupant comfort as cooling progresses
2Object-affected harmful factors
If conditioned air is directed upward and downward to apply wind to the occupant for cooling sensation, then occupant comfort is improved, but airflow does not reach all corners of the room effectively
Solution Approach 1:
The wind direction adjusting blade dynamically switches between upward-downward direction for occupant cooling and forward direction for room-wide distribution, based on real-time temperature stability detection by the control portion
Solution Approach 2:
The system performs preliminary temperature distribution phase before occupant cooling phase. The control portion detects temperature stability and switches modes accordingly, ensuring room temperature is evenly distributed before directing strong airflow to the occupant
3Object-affected harmful factors
If wind direction is fixed to provide cooling to the occupant, then comfort is improved, but the airflow pattern becomes单调 and less comfortable
Solution Approach 1:
The wind direction adjusting blade creates fluctuating airflow by dynamically adjusting the blowout angle within a range rather than maintaining a fixed direction. This dynamic adjustment produces natural, varied airflow patterns that enhance occupant comfort while maintaining effective cooling
Solution Approach 2:
The control portion implements periodic fluctuation of wind direction around an optimal cooling angle, creating a natural airflow pattern that prevents monotony and enhances comfort while maintaining effective cooling delivery to the occupant
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
Ensures uniform temperature distribution and provides a comfortable, natural wind-like cooling sensation by adjusting airflow direction based on room temperature stability, enhancing user experience and air coverage.
Implementation Method 1
a Coanda blade provided in the vicinity of the outlet port, for forming the conditioned air into a Coanda airflow caused to follow the lower face of the blade itself
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Provided is an air conditioner indoor unit that, in the initial stage during the cooling operation, prevents wind being applied to an occupant, and after the room temperature stabilizes, gives the occupant a feeling of coolness. An air conditioner indoor unit (10) implements an upper airflow mode in order to cause airflow to reach into all the corners within a room when the room temperature (Tr) is not within a target temperature range (T s ± a) based on set temperatures Ts. Then, as the temperature of the conditioned air has risen when the room temperature (Tr) becomes within the target temperature range, by implementing an upward and downward wind direction mode, wind can be applied to an occupant, giving a cooling feeling.