Local air purification device
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Solution Overview
Problem
Conventional local air cleaning apparatuses have limitations in providing a larger clean air space and are structurally complex, making them less suitable for certain work environments and procedures that require more space and simplicity.
Innovation Solution
A local air cleaning apparatus with a simpler structure, featuring a push hood with a guide that opposes an air collision face, where the opening face of the guide is of the same shape as the air flow opening face, and the air flow has a flow rate of 0.2 to 0.5 m/s, allowing for a larger clean air space by optimizing the distance and width of the guide and air collision face configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional clean bench with enclosure is used to maintain air cleanliness, then cleanliness is improved, but workability and device size are worsened due to narrow openings and complex structure
Solution Approach 1:
The invention divides the air cleaning function into multiple push hoods (first and second push hoods) positioned at different locations, each responsible for cleaning specific work areas. This segmentation allows workers to access different work zones independently without requiring a fully enclosed structure, thus improving workability while maintaining cleanliness.
Solution Approach 2:
The invention introduces a partition wall as an intermediary structure between the first and second work areas. This partition wall creates separate clean air zones while allowing each zone to be independently serviced by its own push hood, enabling better worker access and simplified structure compared to a fully enclosed clean bench.
2Reliability
If a conventional clean bench with enclosure is used to maintain air cleanliness, then cleanliness is improved, but device complexity and size are worsened
Solution Approach 1:
The air cleaning system is segmented into multiple independent push hoods rather than using a single large enclosed clean bench. Each push hood is a simpler, modular unit that can be independently positioned and operated, reducing overall structural complexity while maintaining effective air cleaning in multiple zones.
Solution Approach 2:
The invention extracts the enclosure structure from the air cleaning system, eliminating the need for a fully enclosed clean bench. Instead, air cleanliness is achieved through localized push hoods that generate controlled air flows, removing the complex enclosure while preserving the essential cleaning function.
3Reliability
If push hoods are arranged opposite to each other with air flow collision to create clean space, then cleanliness is improved, but device complexity is worsened
Solution Approach 1:
The partition wall serves as an intermediary that divides the work space into separate zones served by different push hoods. This eliminates the need for complex coordinated operation of opposite push hoods while maintaining clean air spaces through simpler independent operation of each push hood in its designated zone.
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 apparatus provides a larger clean air space with reduced power consumption and noise, while maintaining high cleanliness within the guide and open region, facilitating easier layout changes and quicker cleaning, compared to traditional systems.
Implementation Method 1
a push hood 2 arranged so as to be opposed to an air collision face W and a guide 3 provided on the push hood 2, the cleaned uniform air flow blown out from the air flow opening face 23 passes through the inside of the guide 3 and then collides with the air collision face W
Implementation Method 2
the cleaned uniform air flow blown out from the air flow opening face 23 passes through the inside of the guide 3 and then collides with the air collision face W
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A local air cleaning apparatus (1) is provided with a push hood (2) having an air flow opening face (23) for blowing out a cleaned uniform air flow and a guide (3) provided on a side of the push hood (2) having the air flow opening face (23), the guide (3) extending from the side thereof having the air flow opening face (23) toward a downstream side of the uniform air flow to form an opening face (31) at a downstream end portion thereof. The push hood (2) is arranged such that the uniform air flow blown out from the air flow opening face (23) passes through the inside of the guide (3) and then collides with an air collision face (W) on a downstream side of the opening face (31). The opening face (31) of the guide (3) is spaced apart from and opposed to the air collision face (W) to form an open region between the opening face (3) and the air collision face (W). The cleaned uniform air flow blown out from the air flow opening face (23) collides with the air collision face (W) and flows out of the opening region, thereby allowing the inside of the guide (3) and the inside of the open region to have higher cleanliness than other regions.