Flow Measurement Channel With Constricted Bypass for Water Drops
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Solution Overview
Problem
Existing physical quantity measuring devices suffer from measurement inaccuracies due to the presence of water drops in high-humidity environments, as the method of bypassing water drops through a sub-flow channel leads to significant changes in flow rate resistance, affecting measurement accuracy.
Innovation Solution
A physical quantity measuring device with a main flow channel and a sub-flow channel featuring a constriction portion that minimizes flow rate changes due to water drops, ensuring accurate measurements by reducing resistance variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sub-flow channel is provided as a bypass channel for water drops, then water drops can be separated from the fluid, but flow rate resistance changes significantly affecting measurement accuracy
Solution Approach 1:
The sub-flow channel is designed with a constriction portion that has a smaller cross-sectional area than the main flow channel. This local geometric differentiation creates different flow characteristics: the main flow channel maintains normal flow for accurate measurement, while the constricted sub-flow channel effectively captures water drops through reduced flow capacity, preventing them from interfering with measurement accuracy.
2Ease of operation
If the sub-flow channel has a large cross-sectional area, then water drops can flow through easily, but flow rate resistance decreases too much affecting measurement
Solution Approach 1:
The constriction portion of the sub-flow channel is designed with specific dimensional parameters - a cross-sectional area that is smaller than the main flow channel but still sufficient to accommodate water drops. This parameter optimization ensures that water drops are effectively captured while maintaining acceptable flow rate resistance, balancing water drop removal efficiency with measurement accuracy.
Data Source
AI summary
A physical quantity measuring device includes a flow channel body, a flow rate measuring unit, an upstream opening, a downstream opening, and a sub-flow channel. The flow channel body includes a main flow channel. The flow rate measuring unit is disposed in the main flow channel. The upstream opening is disposed in upstream of the main flow channel. The downstream opening is disposed in downstream of the main flow channel. The sub-flow channel is disposed in outside the main flow channel to connect the upstream opening and the downstream opening to each other. The sub-flow channel has a constriction portion that reduces a cross-sectional area of the flow channel.