Radial Fan Casing Pressure Tapping Duct Integration
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Solution Overview
Problem
Existing ventilator designs require complex alignment of holes in a separate hose for pressure measurement, adding manufacturing steps and risking contamination, while also being less stable and more prone to errors.
Innovation Solution
The air inlet features two wall elements forming an annular channel volume with slot-shaped openings at their connection areas, eliminating the need for separate hole alignment and allowing for modular production with increased stability and reduced contamination risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate hose with holes is inserted into the housing after manufacturing, then pressure measurement is enabled, but the alignment of holes requires special skill and adds manufacturing complexity
Solution Approach 1:
The patent merges the pressure measurement functionality directly into the housing structure by forming the annular channel volume as an integral part of the air inlet housing. The two wall elements are connected via connecting areas that are already part of the housing structure, eliminating the need for a separate insertable hose and its complex alignment requirements.
Solution Approach 2:
The housing is segmented into two wall elements that form the annular channel volume between them. This segmentation allows the pressure measurement functionality to be integrated into the housing structure itself, with the channel volume formed by the spatial relationship between the two wall elements rather than requiring a separate component.
2Reliability
If holes are made in a separate hose for air penetration, then pressure measurement is enabled, but the holes are prone to contamination by dirt particles
Solution Approach 1:
By merging the pressure measurement channel directly into the housing structure, the openings are formed as integral parts of the housing wall elements rather than as separate holes in an insertable hose. This integration reduces the risk of contamination during assembly and operation.
Solution Approach 2:
The annular channel volume acts as an intermediary structure that guides air flow for pressure measurement while being protected by the housing structure. The slot-shaped openings in the connecting areas provide controlled access points that are less susceptible to contamination compared to holes in a separate hose.
3Reliability
If a separate hose is inserted into the housing, then pressure measurement is enabled, but an additional work step is required
Solution Approach 1:
The pressure measurement functionality is merged into the housing structure itself, eliminating the need for a separate insertion step. The annular channel volume is formed as an integral part of the air inlet housing, allowing pressure measurement to be achieved without additional assembly operations.
Solution Approach 2:
The pressure measurement channel structure is preliminarily formed as an integral part of the housing during the main housing manufacturing process. This preliminary integration eliminates the need for subsequent insertion and alignment operations, improving manufacturing efficiency.
4Measurement precision
If holes are aligned radially in a separate hose, then pressure measurement accuracy is improved, but the alignment process requires special skill and time
Solution Approach 1:
By merging the pressure measurement openings directly into the housing wall elements, the radial alignment requirement is eliminated. The slot-shaped openings in the connecting areas are inherently positioned by the housing structure itself, removing the need for manual alignment operations.
Solution Approach 2:
The housing structure itself provides the positioning and alignment for the pressure measurement openings. The connecting areas between the two wall elements automatically define the location and orientation of the slot-shaped openings, making the system self-aligning and eliminating the need for external alignment operations.
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a fan (1) with a housing (2) which has an air inlet (3), an air outlet (4), and a fan (5) arranged between the air inlet (3) and the air outlet (4), wherein openings (10) leading into a flow channel for pressure measurement are formed in the area of the air inlet (3). To simplify the manufacture of the fan (1), the invention proposes that the air inlet (3) has at least partially two wall elements (9) connected to each other at connection areas (7), together forming a channel volume (8), wherein at least a partial area of a connection area (7) has openings (10).