Honeycomb Anemometer Retaining Device for Fan Flow Accuracy
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Solution Overview
Problem
Existing anemometers in fans are affected by the flow disturbance caused by parts of the ring located in the airflow, leading to reduced measurement accuracy and complexity in the measurement process.
Innovation Solution
A retaining device designed as a flow conditioner with a honeycomb structure and axial flow channels, which includes a central hub for the anemometer, reduces flow disturbances and improves measurement accuracy while serving as a bracket for the anemometer, eliminating the need for separate support elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the anemometer is attached to the fan housing via a ring, then the anemometer can be mounted and retained, but parts of the ring are located in the flow and affect the flow before the anemometer, reducing measurement accuracy
Solution Approach 1:
The patent combines the retaining device and the flow conditioner into a single integrated component. The retaining device includes a housing with a flow conditioner arranged in front of the anemometer, eliminating the need for separate support elements and rings that were previously required. This merging resolves the contradiction by providing accurate flow measurement without the interference of separate mounting components in the airflow path.
Solution Approach 2:
The retaining device serves multiple functions simultaneously: it acts as a mounting structure for the anemometer, a flow conditioner to prepare the airflow, and a protective housing. The flow conditioner within the retaining device conditions the flow while the retaining device itself provides structural support and mounting capabilities. This multi-functionality eliminates the need for additional separate components, resolving the contradiction between measurement accuracy and device complexity.
2Reliability
If separate support elements are used to fasten the anemometer to the fan, then the anemometer can be securely mounted, but the component count and installation complexity increase
Solution Approach 1:
The retaining device integrates the mounting function directly into its housing structure. The anemometer is fastened to the front side of the housing using integrated fastening mechanisms, eliminating the need for separate support elements. This integration maintains secure mounting while reducing component count and installation complexity.
Solution Approach 2:
The retaining device combines multiple functions: it provides structural support, conditions the flow, and secures the anemometer mounting all in one component. The housing serves as both the flow conditioner enclosure and the mounting structure, reducing the need for additional separate support elements and simplifying installation.
3Measurement precision
If the flow is not conditioned before reaching the anemometer, then the measurement process is simpler, but the measurement accuracy of air volumetric flow rate decreases
Solution Approach 1:
The flow conditioner is arranged in front of the anemometer to condition the airflow before it reaches the measurement elements. This preliminary flow conditioning ensures that the airflow is properly prepared for accurate measurement, improving measurement accuracy without complicating the measurement process, as the flow conditioning is automatically performed by the integrated structure.
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
Enhances measurement accuracy of air volumetric flow rate and reduces noise, providing a unified installation solution for the anemometer without increasing component complexity.
Implementation Method 1
The retaining device is designed as a flow conditioner with multiple axial flow channels divided into a honeycomb structure by an arrangement of bars
Implementation Method 2
The anemometer preferably is designed as an impeller anemometer and rotates relative to the retaining device when an air flow from the fan passes through it
Data Source
AI summary
The disclosure relates to a retaining device for an anemometer, designed for use on a fan housing of a fan, wherein the retaining device is designed as a flow conditioner having a plurality of axial flow channels divided into a honeycomb structure by an arrangement of bars, and wherein the retaining device has retaining means, by means of which the anemometer can be fastened to the retaining device such that the former axially adjoins the flow channels.