Flow Meter Core Module Compartmentalization for Waterproofing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional flow meters face issues with moisture protection of sensitive electronics, complex battery replacement, and difficult assembly due to the reliance on potting material, which deforms or wears away over time and complicates the process with its extensive use.
Innovation Solution
The flow meter design features a core module with separate compartments for PCB and power supply assemblies, utilizing physical seals and minimal potting material to enhance waterproofing and simplify assembly and maintenance, allowing for easier power source replacement without removing existing potting material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If potting material is used to encapsulate and protect electronics from moisture, then waterproof protection is improved, but device complexity and assembly difficulty increase
Solution Approach 1:
The enclosure is divided into separate compartments using partitions, allowing different components (PCB assembly, power supply assembly, display assembly) to be housed in isolated sections. This segmentation enables selective access to specific components without disturbing the entire assembly, simplifying maintenance while maintaining waterproof protection through compartmentalized sealing.
Solution Approach 2:
The power supply assembly is extracted and separated from the main PCB assembly, allowing it to be independently accessed and replaced. This extraction eliminates the need to disassemble the entire core module or remove potting material to replace batteries, significantly simplifying maintenance operations while maintaining the waterproof integrity of the enclosure.
2Reliability
If extensive potting material is used to encapsulate components, then moisture protection is improved, but ease of repair deteriorates
Solution Approach 1:
The enclosure is divided into separate compartments using partitions, allowing different components (PCB assembly, power supply assembly, display assembly) to be housed in isolated sections. This segmentation enables selective access to specific components without disturbing the entire assembly, simplifying maintenance while maintaining waterproof protection through compartmentalized sealing.
Solution Approach 2:
The power supply assembly is extracted and separated from the main PCB assembly, allowing it to be independently accessed and replaced. This extraction eliminates the need to disassemble the entire core module or remove potting material to replace batteries, significantly simplifying maintenance operations while maintaining the waterproof integrity of the enclosure.
3Object-affected harmful factors
If watertight seals are used to protect the enclosure, then moisture protection is improved, but reliability deteriorates due to seal imperfections and deformation
Solution Approach 1:
The enclosure utilizes a composite sealing approach combining waterproof seals at critical interfaces (enclosure-to-flow-cell, top cover-to-enclosure) with minimal strategic use of potting material to encapsulate sensitive electronics. This composite approach leverages the reliability of mechanical seals while using potting material only where needed to protect against moisture, avoiding the drawbacks of extensive potting while maintaining comprehensive protection.
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 design provides enhanced waterproof protection for sensitive components, simplifies power replacement, and reduces assembly complexity, resulting in a more reliable, cost-effective, and user-friendly flow meter.
Implementation Method 1
a partition mounted within the interior cavity of the enclosure, the partition separating the interior cavity into an upper compartment and a lower compartment
Implementation Method 2
The core module is assembled using watertight seals to prevent the introduction of moisture into the enclosure
Implementation Method 3
voids within the enclosure are commonly filled with a potting material (e.g., an epoxy potting compound). In this manner, the various electrical components contained within the module are encapsulated within the potting material and thereby protected from moisture
Data Source
AI summary
A flow meter for measuring the flow rate or volume of a fluid includes a flow tube shaped to define an internal passageway through which the fluid travels, a set of transducers coupled to the flow tube in fluid communication with the internal passageway, and a core module coupled to the flow tube. The core module comprises a cup-shaped enclosure shaped to define an interior cavity and a top cover mounted on the enclosure to enclose the interior cavity. A disc-shaped partition separates the interior cavity into an upper compartment which receives a printed circuit board assembly and a lower compartment which receives a power supply assembly and a connector assembly. Separating the interior cavity into distinct compartments allows for different waterproofing techniques to be utilized based on the sensitivity and lifespan differential between the various electrical components, thereby minimizing the use of potting material and facilitating component replacement.