Extraction device
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Solution Overview
Problem
Existing static and motorized extraction devices for gaseous fluids face inefficiencies due to opposing air flows and reliance on wind or temperature conditions, leading to suboptimal performance.
Innovation Solution
A static-mechanical extraction device with a centrifugal turbine housed in an upper element, featuring air inlet and outlet openings aligned with the longitudinal axis, allowing air to flow parallel to the turbine, enhancing induction suction and improving stale air evacuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a centrifugal turbine is used to improve stale air evacuation, then extraction performance is improved, but opposing air flows through the cup opening reduce efficiency
Solution Approach 1:
The cup opening is segmented into multiple independent openings: air inlet openings for drawing outside air, air outlet openings for discharging turbine exhaust air, and a central opening for the turbine shaft. This segmentation allows separate control of different air flows, preventing them from opposing each other and improving overall extraction efficiency.
Solution Approach 2:
Different regions of the cup opening have different functions optimized for their specific purpose. The peripheral regions have inlet/outlet openings for air exchange, while the central region accommodates the turbine shaft. This local differentiation ensures that outside air intake and turbine exhaust discharge occur in separate zones, eliminating flow interference.
2Device complexity
If static device is used to reduce complexity, then device simplicity is improved, but performance depends on wind and temperature conditions
Solution Approach 1:
The device transitions from a purely static structure to a dynamic system with a motor-driven centrifugal turbine. The turbine can rotate to actively draw in outside air and discharge exhaust air, providing reliable extraction performance that does not depend on wind or temperature conditions, while maintaining relatively simple device structure.
3Productivity
If air inlet and outlet openings are arranged radially outside each other, then airflow paths are separated, but device complexity increases
Solution Approach 1:
The cup structure serves multiple functions simultaneously: it provides the housing for the centrifugal turbine, contains the air inlet and outlet openings for separate air flow paths, and maintains the structural integrity of the upper element. This multi-functionality achieves separated airflow paths without significantly increasing device complexity.
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 device achieves efficient stale air extraction by maximizing natural forces and mechanical assistance, optimizing airflow dynamics and reducing energy consumption and noise.
Implementation Method 1
The extraction of stale air is carried out by the centrifugal turbine 30 which draws in outside air at the periphery and injects it in the form of air streams towards the lower element 20, causing an induction or suction effect of the stale air from the duct 14 by a depression.
Implementation Method 2
In the absence of wind, the residual thermal draft, based on the physical phenomenon occurring in any vertical duct, remains the only upward force.
Implementation Method 3
The lower element 20 and upper element 100 are bounded by conical or frustoconical side walls, such that the passage 11 has, in axial section, a general venturi or convergent/divergent shape along a radial direction orthogonal to the general axis of the device.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
A static-mechanical extraction device (10) for the evacuation of stale air, comprising an upper element (100) and a lower element (20) rigidly fixed to each other and separated from each other along a longitudinal axis (Z1) so as to define a free space (11) between them, the device further comprising a conduit (14) passing through the lower element (20) and opening into the free space (11), the upper element (100) comprising a cavity (140) in which is housed a centrifugal turbine (30) with axis to the longitudinal axis (Z1), characterized in that the cavity (140) comprises: - one or more air inlet openings (141) communicating into the free space (11); and - one or more air outlet openings (142) communicating into the free space (11), each air outlet opening (142) being arranged radially outside said one or more air inlet openings (141) with respect to the longitudinal axis (Z1).