Ceiling Air Duct Wall Geometry for Stable AC Airflow Direction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ceiling-embedded air conditioners face issues with air flowing along the longitudinal end portion of the airflow direction flap, leading to smudging and short cycling due to weak airflow and improper direction control.
Innovation Solution
The air conditioner incorporates a blowing air duct configuration with a protruding portion on the outer air duct wall, which increases air velocity and directs airflow away from the ceiling, preventing smudging and short cycling by maintaining a consistent airflow angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the chord length of the longitudinal end portion of the airflow direction flap is reduced, then the air current is directed downward to prevent ceiling smudging, but the air current cannot flow along the airflow direction flap over a satisfactory distance causing short cycling
Solution Approach 1:
The patent applies local quality by creating a protruding portion at a specific location (longitudinal end portion) of the airflow direction flap. This protruding portion has a different structure (extended chord length) compared to the main body of the flap, allowing the air current to flow along this extended portion over a satisfactory distance while the rest of the flap maintains the reduced chord length configuration for directing air downward and preventing ceiling smudging.
2Speed
If the chord length of the longitudinal end portion of the airflow direction flap is reduced, then the air current is directed downward, but the air current flows out downward of the direction extended from the airflow direction flap
Solution Approach 1:
The protruding portion is strategically positioned at the longitudinal end portion of the airflow direction flap, creating a localized extension that guides the air current to flow along the extended portion. This ensures the air current exits in the correct direction (along the extended direction of the airflow direction flap) while the reduced chord length of the main flap body maintains downward airflow direction control.
3Object-affected harmful factors
If the chord length of the longitudinal end portion of the airflow direction flap is reduced, then the air current is directed downward, but the air current cannot flow along the airflow direction flap over a satisfactory distance
Solution Approach 1:
The patent extends the chord length specifically at the longitudinal end portion of the airflow direction flap by adding a protruding portion. This localized extension increases the length of the airflow path along the flap at the critical end portion, allowing the air current to flow along the flap over a satisfactory distance, while the overall reduced chord length configuration prevents ceiling smudging.
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 reduces smudging and prevents short cycling by ensuring airflow is directed correctly, maintaining a consistent angle that prevents air from being directed upward toward the ceiling, while enhancing air velocity and reducing pressure loss.
Implementation Method 1
a blowing air duct configuration with a protruding portion on the outer air duct wall, which increases air velocity and directs airflow away from the ceiling
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
Provided is an air conditioner (1), including: at least one air inlet and at least one air outlet; a wall portion (11) ; an airflow direction flap; an air sending unit (17) ; and a heat exchanger (19) . The wall portion includes an inner air duct wall (41) and an outer air duct wall (43). The outer air duct wall is at a position more distant from the heat exchanger than the inner air duct wall. A distance between a center portion (43a) of the outer air duct wall in a longitudinal direction and a center portion (41a) of the inner air duct wall in the longitudinal direction is smaller than a distance between each side portion (43b) of the longitudinal center portion and each side portion (41b) of the longitudinal center portion of the inner air duct wall.