Air Conditioner Door Assembly With Distributed Drive for Low Noise
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Solution Overview
Problem
The door assembly of air conditioner indoor units experiences high noise and unstable operation due to high torque demands on the driving device, leading to potential damage and reduced lifespan.
Innovation Solution
A door assembly design featuring a receiving chamber with multiple driving assemblies mounted inside, where one end of each assembly penetrates through the bottom wall and is connected to the door, providing stability and reducing torque, thus lowering noise and extending the assembly's lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single driving device is used to open or close the air outlet door, then the structure is simple, but the torque demand is high causing noise and unstable operation
Solution Approach 1:
The single driving device is divided into multiple driving assemblies (typically three) that are distributed around the receiving chamber. Each driving assembly independently drives the door, segmenting the total torque requirement and reducing the load on each individual assembly, thereby lowering noise and improving operational stability.
Solution Approach 2:
Multiple driving assemblies are combined to work together in unison, merging their individual driving forces to collectively operate the door. This combination allows each assembly to operate at lower torque levels while achieving the same overall effect, reducing noise and improving reliability.
2Device complexity
If the driving assembly is exposed to external forces, then the structure is simple, but the driving assembly is easily displaced or damaged reducing lifespan
Solution Approach 1:
The driving assembly is nested within the receiving chamber, which acts as a protective housing. The bottom wall of the receiving chamber provides structural support and protection to the driving assembly, shielding it from external forces and preventing displacement or damage, thereby extending service life.
Solution Approach 2:
The bottom wall of the receiving chamber serves as an intermediary protective element between the driving assembly and external forces. It transmits and distributes external loads, preventing direct impact on the driving assembly components.
3Object-generated harmful factors
If multiple driving assemblies are used to drive the door, then the torque of each assembly is reduced lowering noise, but the device complexity increases
Solution Approach 1:
The total driving function is segmented into multiple independent driving assemblies, each handling a portion of the total torque. This segmentation reduces the torque burden on each assembly, lowering operational noise while the modular nature of the segments keeps the overall system manageable.
Data Source
AI summary
A door assembly for an air conditioner indoor unit includes a door mounting plate, including a receiving chamber having a fitting opening on one side and a bottom wall on another side, a door arranged adjacent to the bottom wall of the receiving chamber and configured to be movable toward and away from the door mounting plate, and a plurality of driving assemblies arranged in the receiving chamber. An end of each driving assembly passes through the bottom wall of the receiving chamber to be connected to the door. Locations of the ends of the plurality of driving assemblies connected to the door are uniformly distributed on the door. The plurality of driving assemblies are configured to drive the door to move.