Flow Sensing Module Bypass Channel Pressure Loss Reduction
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Solution Overview
Problem
Conventional flow sensors with pressure drop elements in the main fluid channel suffer from significant pressure loss and reduced linearity and sensitivity, making them unsuitable for applications requiring precise fluid flow measurement, and they are prone to fouling due to impurity accumulation.
Innovation Solution
A flow sensing module with a bypass channel and no pressure drop element in the main fluid channel, where the flow sensor is placed in the bypass channel to measure fluid flow rate, allowing for improved pressure drop characteristics, linearity, and sensitivity, and reduced impurity accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pressure drop element is disposed in the main fluid channel to guide fluid into the bypass fluid channel, then the flow rate measurement is enabled, but the pressure loss increases significantly
Solution Approach 1:
The pressure drop element is extracted from the main fluid channel and relocated to the bypass fluid channel. This allows the main fluid channel to remain open and unobstructed, minimizing pressure loss while still enabling flow rate measurement through the bypass channel where the pressure drop element resides.
Solution Approach 2:
The fluid flow path is segmented into a main fluid channel for minimal-resistance flow and a bypass fluid channel for measurement purposes. The pressure drop element is placed only in the bypass channel, separating the measurement function from the main flow path and reducing overall pressure loss.
2Measurement precision
If a pressure drop element is disposed in the main fluid channel, then the flow rate can be measured, but the linearity and sensitivity are reduced
Solution Approach 1:
The pressure drop element is extracted from the main fluid channel and placed in the bypass fluid channel. This separation allows the main channel to maintain optimal flow characteristics for high linearity and sensitivity, while the bypass channel with the pressure drop element handles the measurement function.
3Measurement precision
If a pressure drop element is disposed in the main fluid channel, then the flow rate measurement is achieved, but the impurity accumulation increases
Solution Approach 1:
The pressure drop element is extracted from the main fluid channel and relocated to the bypass fluid channel. This positioning reduces impurity accumulation in the main channel by maintaining smoother flow conditions, while the bypass channel with the pressure drop element serves as a separate measurement pathway.
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
The solution results in minimal pressure loss, enhanced linearity and sensitivity, and improved dynamic range of measurement, while preventing impurity accumulation and maintaining measurement precision.
Implementation Method 1
a flow sensor to sense a flow rate of a fluid in the bypass channel and obtain a measured value
Data Source
AI summary
A flow sensing module with a bypass channel is provided. The flow sensing module may include a body portion and a flow sensor. The body portion may include a main fluid inlet, a main fluid outlet, a main fluid channel extending between the main fluid inlet and the main fluid outlet, a bypass fluid inlet and a bypass fluid outlet each configured to be in communication with the main fluid channel, and a bypass fluid channel extending between the bypass fluid inlet and the bypass fluid outlet. The flow sensor may be disposed in the bypass fluid channel to sense a flow rate of a fluid in the bypass channel. No pressure drop element is disposed in the main fluid channel, so the main fluid channel may have a pressure loss of a very small value. Moreover, linearity and sensitivity of the flow sensing module may also be improved.