Modular HVAC Controller Assembly for Reliable Sub-Assembly Connection
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Solution Overview
Problem
Existing HVAC control systems face challenges in ease of use, assembly, construction, and reliability, particularly in the integration of sub-assemblies and power management, which affects their performance and user experience.
Innovation Solution
The design incorporates a modular approach with a first and second sub-assembly that releasably engage, featuring a housing and printed circuit boards with inter-board connectors and adjustable components to accommodate misalignment, along with a battery compartment and power management system to ensure reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a modular design with releasably engaged sub-assemblies is used, then ease of assembly and disassembly is improved, but connection reliability and signal transmission stability may worsen
Solution Approach 1:
The HVAC controller is divided into multiple sub-assemblies (display sub-assembly and control sub-assembly) that can be separately manufactured and then releasably engaged. Each sub-assembly contains specific functional components, allowing for modular assembly and disassembly while maintaining overall system functionality.
Solution Approach 2:
An inter-board connector serves as an intermediary element between the first and second printed circuit boards. This connector includes alignment features and contact elements that ensure reliable electrical connection while accommodating minor misalignments, thus bridging the gap between modular components.
2Adaptability or versatility
If components are laterally offset and extend toward each other across a spacing, then adaptability to misalignment is improved, but manufacturing precision requirements worsen
Solution Approach 1:
The inter-board connector incorporates flexible or adjustable elements that can dynamically adapt to minor misalignments between sub-assemblies. The connector design allows for lateral adjustment and compensation, enabling the system to accommodate manufacturing tolerances while maintaining reliable connections.
Solution Approach 2:
The design includes alignment features and tolerance compensation mechanisms built into the connector structure beforehand. These features anticipate and cushion against potential misalignments, reducing the impact of manufacturing variations on connection reliability.
3Ease of repair
If sub-assemblies are designed to releasably engage, then ease of repair and maintenance is improved, but device complexity increases
Solution Approach 1:
The controller is segmented into distinct sub-assemblies that can be independently accessed, removed, and replaced. This segmentation enables targeted maintenance and repair of specific components without requiring disassembly of the entire device, simplifying the maintenance process despite the modular complexity.
Solution Approach 2:
The releasable connection mechanism serves multiple functions: it enables easy assembly and disassembly, facilitates maintenance and repair, allows for component testing and replacement, and supports different configuration options. This multi-functionality justifies the increased complexity by providing numerous operational benefits.
Data Source
AI summary
An HVAC Controller may include a first sub-assembly and a second sub-assembly releasably engageble with the first sub-assembly. The first sub-assembly may include a first housing and a printed circuit board capable of being secured relative to the first housing and capable of providing one or more signals. The second sub-assembly may include a second housing and a second printed circuit board capable of being secured relative to the second housing and capable of receiving the one or more signals from the first printed circuit boards when the first sub-assembly is releasably engaging the second sub-assembly. The first printed circuit board and the second printed circuit board each may have one or more component mounted on sides facing one another, the components each extending a distance. The sum of the distances may be greater than a distance spacing the facing sides of the printed circuit boards.