Air Conditioner Blow-off Device Pressure Adjustment Unit
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Solution Overview
Problem
Existing blow-off devices for air conditioners experience increased flow velocity and wind noise when the rotation angle of the wind direction variable fins increases, leading to a decrease in the cross-sectional area of the ventilation passage.
Innovation Solution
Incorporating a pressure adjustment unit within the ventilation passage, with its inlet positioned upstream of the downstream end portion at maximum rotation of the wind direction variable means, to release air and prevent pressure from exceeding a predetermined value, thereby suppressing flow velocity and wind noise. Additionally, the outlet of the pressure adjustment unit is placed downstream of the inclined part to widen the blowing-off angle and the inlet can be inclined outward to enhance airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rotation angle of the wind direction variable fins increases, then the wind direction control range is improved, but the cross-sectional area of the ventilation passage decreases and flow velocity increases causing wind noise
Solution Approach 1:
A pressure adjustment unit is introduced as an intermediary component in the ventilation passage. This unit includes a pressure adjustment fin that can rotate independently to adjust the passage cross-sectional area, mediating between the wind direction variable fins and the airflow to prevent excessive velocity and noise while maintaining directional control capability
Solution Approach 2:
The ventilation system is segmented into functionally independent components: wind direction variable fins for directional control and a separate pressure adjustment fin for flow velocity control. This segmentation allows each component to optimize its function without interfering with the other, enabling wide angle control without necessarily causing high velocity in narrow passages
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 effectively suppresses flow velocity in areas with a small cross-sectional area and reduces wind noise, while also widening the blowing-off angle and improving airflow efficiency.
Implementation Method 1
a pressure adjustment unit (60) which is provided in the ventilation passage (50) to prevent the pressure of the ventilation passage (50) from exceeding a predetermined value by releasing air to the outside of the ventilation passage (50)
Data Source
AI summary
A blow-off device (10) is equipped with a wind direction variable means (40) and a pressure adjustment unit (60) in a ventilation passage (50). The wind direction variable means is rotatably provided in the ventilation passage and can change a conditioned air from the inflow port (50c) toward a blow-off port (50d) and a second inclined part (52r) along an intermediate part (53r). The pressure adjustment unit prevents the pressure of the ventilation passage from exceeding a predetermined value by releasing the conditioned air to the outside of the ventilation passage. A bypass inlet (66) of the pressure adjustment unit is provided on an upstream side of an end portion (42d) in a +X direction at the time of maximum rotation of the wind direction variable means.