Air Filter Suction Fan with Guide Vane and Chimney Casing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing air filtration devices suffer from insufficient air throughput and contamination risks when filters are unscrewed, due to inadequate design and noise issues from impeller interactions with diffuser ribs.
Innovation Solution
The device incorporates a guide vane, impeller with conical lateral surface and curved blades, a chimney-shaped casing, and a dust flap mechanism with magnetic and Hall element safety features to ensure correct filter installation and prevent contamination, along with a cylindrical filter housing for enhanced suction capacity and space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional suction fan with impeller and diffuser ribs is used, then the device structure is simple, but the air throughput is insufficient and noise is generated
Solution Approach 1:
The fan assembly is segmented into distinct functional components: guide vane with angled blades for pre-swirling air flow, impeller with curved blades for pressure generation, and chimney-shaped casing for flow direction. Each segment performs a specific aerodynamic function to collectively achieve high throughput.
Solution Approach 2:
The impeller blades are designed with curved geometry rather than straight edges, and the chimney-shaped casing features smooth curved transitions. These curved surfaces optimize air flow patterns, reduce turbulence, and minimize noise while maximizing air throughput.
2Ease of repair
If filters are made removable for maintenance, then ease of maintenance is improved, but contamination risk increases when filters are unscrewed
Solution Approach 1:
The dust flap is positioned to close the inlet opening before any filter removal can occur. This preliminary protective action prevents contaminated air from entering the housing during filter maintenance, addressing the contamination risk before it can manifest.
Solution Approach 2:
The dust flap acts as an intermediary protective element between the external contaminated environment and the internal clean housing space. It provides a mechanical barrier that can be actuated independently of filter removal operations.
3Object-affected harmful factors
If a dust flap is added to prevent contamination, then contamination protection is improved, but device complexity increases
Solution Approach 1:
The dust flap is merged with the existing inlet opening structure of the housing. The flap utilizes the same mounting locations and structural interfaces already present in the design, adding protective functionality without requiring separate complex mechanisms or additional components.
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 significantly increases air throughput to 800 l/min, prevents contamination by ensuring correct filter installation, and reduces noise, while maintaining a compact design.
Implementation Method 1
The guide vane 29 has a circular-cylindrical lateral surface 32 with angled vane blades 33 formed thereon
Implementation Method 2
The impeller 30 is designed with a conical lateral surface 35 and arcuate impeller blades 36 formed thereon
Implementation Method 3
a chimney-shaped casing 25 with a rosette-like outlet 26
Implementation Method 4
If the flap is provided with a magnet and a Hall element is provided on the filter housing, which can be switched by the magnet
Implementation Method 5
The flap is advantageously provided with a spring-elastic closure means in order to press the flap against the inlet opening of the housing
Data Source
Figure 1~3
Figure 4~7
Figure 8~10
AI summary
The invention relates to a device (1) for filtering contaminated air, comprising an air filter, an intake fan (27) driven by an electric motor (28), a filter housing (2), to which the air filter can be fastened by means of a threaded connection, and a battery (18) for driving the electric motor, characterized in that the intake fan (27) has a guide blade (29) and an impeller (30), and the intake fan (27) is arranged in a chimney-shaped shell (25) on the filter housing (2).