Fan Flow Rectifier with Integrated Pressure Measurement
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Solution Overview
Problem
In ventilation and air conditioning technology, determining the required volumetric flow of radial ventilators at constant speed is challenging due to the lack of a clear connection between power consumption and flow, and existing methods, such as using hose lines for static pressure measurement, are complex and costly.
Innovation Solution
A current rectifier in the form of a preliminary line grid is positioned on the ventilator's suction area with axial initial and exit flow sides, featuring crossing struts with integrated pressure measuring conduits and openings for connecting to a pressure sensor, allowing direct measurement of static pressure to determine volumetric flow, reducing noise and structural complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If hose lines are used for static pressure measurement in radial ventilators, then volumetric flow can be determined, but the mounting becomes complicated and costs increase
Solution Approach 1:
The patent combines the pressure measurement function with the existing current rectifier structure by integrating pressure taps directly into the struts. This merging eliminates the need for separate hose lines and external pressure sensors, thereby reducing mounting complexity while maintaining measurement capability
Solution Approach 2:
The current rectifier structure is given multiple functions: it continues to serve as a flow conditioning element while simultaneously providing integrated pressure measurement capability through built-in taps. This multi-functionality eliminates the need for additional separate components
2Measurement precision
If hose lines and external pressure sensors are used for static pressure measurement, then volumetric flow can be determined, but costs increase
Solution Approach 1:
By merging the pressure measurement functionality into the existing current rectifier structure, the patent eliminates the need for separate hose lines and external pressure sensors, thereby reducing component count, material costs, and assembly expenses
Solution Approach 2:
The patent discards the traditional separate hose line and external sensor arrangement, recovering instead the existing current rectifier structure to serve dual purposes, thereby eliminating unnecessary components and reducing overall system cost
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 solution simplifies volumetric flow measurement by integrating the measurement means within existing structural components, reducing costs and mounting complexity, while providing accurate flow determination by leveraging the physical properties of ventilator flow and minimizing noise and turbulence, ensuring precise calculations.
Implementation Method 1
The static pressure in the inflow area of the ventilator is transferred into the pressure measuring conduit via the small openings on the struts on the exit flow side, where it can be directly measured by the pressure sensor
Implementation Method 2
The more uniform flow and the reduction of inflow turbulence by the current rectifier improve the accuracy of the measuring of the static pressure on the current rectifier
Data Source
AI summary
The present disclosure relates to a current rectifier for being arranged on the suction area of a ventilator, with an axial initial flow side and an axial exit flow side, wherein the current rectifier comprises several crossing struts formed by at least one circumferential strut and by at least one radial strut, and a pressure measuring conduit is constructed at least in one of the struts and which comprises at least one opening facing the exit flow side, and wherein the pressure measuring conduit comprises a measuring opening for being connected to a measuring line for the connection to a pressure sensor or a pressure sensor is integrated in the pressure measuring conduit.