HVAC Door Assembly with Asymmetric Locking for Misalignment
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Solution Overview
Problem
Existing HVAC unit doors are limited in flexibility due to their integrally formed body and shaft, which restricts assembly options and can lead to misalignment and noise issues during air passage.
Innovation Solution
A two-part configuration door design where the door body and shaft are separately formed, with a locking portion that includes key and groove elements arranged in a non-equidistant manner, allowing for proper orientation and secure engagement, preventing misassembly and air leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the door body and shaft are integrally formed, then the structure is simple and manufacturing is easier, but assembly flexibility is reduced and misalignment issues occur
Solution Approach 1:
The door assembly is divided into separate components: the door body and the shaft are formed as distinct parts that can be independently manufactured and then assembled together using the locking portion, enabling flexible assembly while maintaining manufacturing simplicity
2Device complexity
If the door body and shaft are integrally formed, then manufacturing steps are reduced, but alignment precision and noise control deteriorate
Solution Approach 1:
The locking portion incorporates asymmetric key and groove elements arranged in a non-equidistant manner, which provides precise alignment guidance during assembly and prevents misalignment, thereby improving alignment precision while maintaining reasonable device complexity
3Ease of operation
If the locking portion uses equidistant key and groove elements, then assembly is simpler, but proper orientation cannot be ensured and misassembly occurs
Solution Approach 1:
The key and groove elements are arranged in a non-equidistant pattern around the shaft, creating unique orientation references that guide proper assembly orientation and prevent misassembly, while still maintaining ease of operation through the simple locking mechanism
Data Source
AI summary
A door for an air conditioning unit includes a door body, a shaft, and a locking portion. The door body includes a sleeve. The shaft is inserted into the sleeve. The locking portion is disposed in the sleeve and the shaft. The shaft is detachably engaged to the sleeve through the locking portion.