Clean Air Device Suction-Port Sampling Before Laminar Flow
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Solution Overview
Problem
Existing clean air devices in sterile environments face challenges in managing and measuring dust effectively due to turbulent air flows, which can lead to overlooked dust leakage from HEPA filters, especially when laminar flow is required to prevent dust spread and contamination.
Innovation Solution
A clean air device configuration with an air cleaning unit followed by a rectifying unit to create a laminar flow, featuring at least one suction port on the wall surface between the units to draw air from the turbulent flow zone for reliable dust measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sampling tube is inserted into the workroom wall to measure dust, then dust measurement is enabled, but in laminar flow conditions dust leakage from HEPA filter cannot be detected
Solution Approach 1:
The invention extracts the sampling tube from the workroom interior and relocates it to the space between the HEPA filter and the rectifying unit. This extraction allows the sampling tube to access the turbulent flow zone where dust leakage from the HEPA filter can be detected, while the rectifying unit continues to maintain laminar flow in the workroom. The sampling tube is positioned to draw air from the region where leaked dust would accumulate before the rectifying unit organizes the flow.
Solution Approach 2:
The invention introduces an intermediary sampling location in the space between the HEPA filter and the rectifying unit. This intermediary position serves as a detection zone where dust leakage can be captured without disrupting the laminar flow in the workroom. The sampling tube acts as a mediator that monitors the interface between the filtered air source and the organized flow, enabling detection of contamination events.
2Object-affected harmful factors
If laminar flow is created to prevent dust spread, then contamination risk is reduced, but dust measurement becomes unreliable
Solution Approach 1:
The invention segments the air flow system into two distinct zones: a turbulent flow zone between the HEPA filter and the rectifying unit where dust measurement occurs, and a laminar flow zone in the workroom where contamination prevention is maintained. The rectifying unit acts as the segmentation interface, organizing the turbulent flow into laminar flow while allowing the sampling tube to access the pre-rectification zone for measurement.
Solution Approach 2:
The sampling tube is positioned as an intermediary element in the space between the HEPA filter and the rectifying unit, allowing dust measurement without interfering with the laminar flow in the workroom. This intermediary location provides access to dust particles that have leaked from the HEPA filter but have not yet been organized into laminar flow, enabling reliable detection while maintaining clean flow conditions in the workroom.
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
Enables accurate measurement and detection of dust increases within the workspace, ensuring cleanliness standards are maintained by capturing dust leakage from the HEPA filter effectively, even in laminar flow conditions.
Implementation Method 1
a suction port provided on a wall surface in a space formed between the air cleaning unit and the rectifying unit to draw out air
Data Source
AI summary
With respect to a clean air device, in order to provide a device structure and an air cleaning unit inspecting method capable of supplying clean air through a filter and also capable of measuring the amount of dust in a workroom space in which blown air forms a laminar flow such that an increase in the amount of dust can be accurately detected, the clean air device comprises an air cleaning unit, a rectifying unit arranged downstream of the air cleaning unit configured to rectify air blown from the air cleaning unit and form a laminar flow, and a workroom arranged downstream of the rectifying unit, wherein at least one suction port is provided on a wall surface in a space formed between the air cleaning unit and the rectifying unit, configured to draw out the air in the space to an exterior.