Wall-Mounted AC Indoor Unit With Mixed Air Downward Outlet
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Solution Overview
Problem
Existing wall-mounted air conditioner indoor units produce hot exchange air with a small air volume and slow circulation speed, leading to uncomfortable cooling due to direct blowing of cool air and inefficient air distribution.
Innovation Solution
A wall-mounted air conditioner indoor unit design featuring a mixed air outlet with an air delivery apparatus comprising sequentially arranged air-duct bodies and a centrifugal fan, which mixes hot and non-hot exchange air, directing the mixed air downwards for improved flowability and temperature adjustability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If all output air is hot exchange air, then the air conditioner can achieve direct cooling effect, but the air volume is relatively small and circulation speed is slow
Solution Approach 1:
The air outlet is divided into multiple independent air outlets, with each air outlet capable of independently blowing air in different directions. This segmentation allows the system to simultaneously discharge hot exchange air for cooling while incorporating non-hot exchange air to increase overall air volume and circulation speed.
Solution Approach 2:
The air delivery apparatus includes a centrifugal fan that can dynamically adjust air flow distribution between hot exchange air and non-hot exchange air. The system dynamically switches between different air discharge modes (all hot exchange air, all non-hot exchange air, or mixed) based on operational requirements, optimizing both cooling effect and air circulation.
2Temperature
If cool air is directly blown out to the user, then rapid cooling is achieved, but the user feels uncomfortable due to direct cold air exposure
Solution Approach 1:
Different air outlets discharge air with different characteristics - some outlets discharge cool hot exchange air for rapid cooling, while others discharge gentler non-hot exchange air to avoid direct cold air exposure on users. This local differentiation of air quality addresses both rapid cooling needs and user comfort requirements.
Solution Approach 2:
Non-hot exchange air serves as an intermediary substance that mixes with hot exchange air. This intermediary air softens the direct impact of cold air on users while still allowing cooling effects to be achieved, thereby eliminating the harmful effect of direct cold air exposure.
3Ease of manufacture
If the air conditioner is mounted at a high position, then it can be installed on the wall, but the air output direction needs to be downward for effective air distribution
Solution Approach 1:
The air delivery apparatus enables dynamic control of air flow direction, allowing the system to discharge air downward despite high wall-mounted installation. The centrifugal fan and adjustable air outlets can orient air flow in different directions, ensuring effective air distribution regardless of installation height.
Solution Approach 2:
The air outlet structure incorporates three-dimensional air discharge capabilities with outlets positioned at different angles and orientations. This spatial arrangement allows air to be effectively distributed in downward directions even when the unit is mounted high on the wall, transforming the constraint of high installation position into a multi-directional air distribution system.
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
Increases air volume and uniformity, making the air output more gentle and comfortable, while ensuring effective air distribution by blowing mixed air downwards from a high installation position, enhancing user experience and indoor air flow.
Implementation Method 1
a volute and a centrifugal fan located inside the volute are disposed inside the housing and above the air delivery apparatus
Implementation Method 2
heat exchangers are disposed inside the housing
Data Source
AI summary
A wall-mounted air conditioner indoor unit includes a housing having a front housing and a rear housing, main air intake portions formed on the housing, a mixed air outlet formed on a lower portion of the front housing, a non-hot exchange air inlet formed on the rear housing, and an air delivery apparatus disposed inside the housing. The hot exchange air passage has an upper portion with a size greater than that of its lower portion. A volute and a centrifugal fan located inside the volute are disposed inside the housing and above the air delivery apparatus. An air output portion of the volute faces the hot exchange air passage, and includes a surrounding portion extending to the air delivery apparatus and surrounding the hot exchange air passages, and air mixed cavities are formed between the surrounding portion and the hot exchange air passages.