Clean Room Ventilation Unit With Integrated Airflow Regulation
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Solution Overview
Problem
Conventional ventilation systems for clean rooms are complex, costly to install and maintain, and difficult to adapt to varying requirements for air supply and extraction across different clean room classes and production processes.
Innovation Solution
A compact, integrated ventilation device with a housing containing a passage duct, fan, outside air duct, and exhaust air duct, along with volume flow regulators and a control unit, allowing for adjustable air flow and temperature control, and capable of satisfying diverse clean room requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional distributed ventilation systems with multiple functional units and duct networks are used, then air supply and extraction can be achieved, but device complexity and installation cost increase significantly
Solution Approach 1:
The patent combines multiple functional units (circulated air device, outside air conditioner, volume flow controllers) into a single integrated ventilation device. The housing contains all components including the fan, filters, heating/cooling elements, and control systems, eliminating the need for separate distributed units and reducing overall system complexity while maintaining air supply and extraction capabilities
Solution Approach 2:
The integrated ventilation device performs multiple functions within a single unit: it supplies circulated air, introduces outside air, extracts waste air, heats or cools air, and regulates volume flows. This multi-functional design replaces several specialized devices with one universal unit, simplifying installation and reducing the number of connections required
2Manufacturing precision
If separate functional units with distributed control systems are used, then precise parameter control is achieved, but maintenance and servicing difficulty increases
Solution Approach 1:
The control system is integrated within the single housing along with all functional components. Volume flow controllers, temperature controls, and sensors are co-located with the elements they regulate, eliminating the need for distributed wiring and complex inter-unit communication. This integration simplifies troubleshooting and maintenance as all components are accessible from one location
3Reliability
If multiple functional units with numerous connections are used, then ventilation requirements are met, but installation expenses increase
Solution Approach 1:
By consolidating all ventilation functions into one housing, the patent dramatically reduces the number of duct connections, electrical wiring harnesses, and mechanical joints required for installation. A single unit replaces multiple separate devices, reducing both material costs and labor expenses while maintaining full ventilation functionality
Solution Approach 2:
The housing is designed as a self-contained module that can be installed as a single unit, facilitating modular installation. This segmentation allows the entire ventilation system to be treated as one replaceable component, simplifying both initial installation and future replacements without requiring complex system-wide adjustments
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 provides a simple, efficient solution for air supply and extraction in clean rooms, reducing installation and maintenance costs while maintaining precise control over air quality and pressure conditions, accommodating various clean room classes and production processes.
Implementation Method 1
a fan (49) is provided in the interior, which is arranged in the passage duct (16) in order to convey air from a suction-side chamber (47) fluidically connected to the waste air inlet (13) to a pressure-side chamber (48) fluidically connected to the supply air outlet (14)
Implementation Method 2
Installed in the outside air duct (22) is a first volume flow regulator (36), and installed in the exhaust air duct (28) is a second volume flow regulator (37)
Implementation Method 3
the rotational speed of the fan (49) in the passage duct (16) is controllable... A control unit (68) is configured so as to control the operation of the first and the second volume flow regulators (36, 37) and to control the rotational speed of the fan (49), as required
Data Source
AI summary
A ventilation device for supplying air to a clean room having a passage duct (16) with a waste air inlet (13) for receiving waste air form the room and a supply air outlet (14) for discharging supply air (34) to the room. A speed controllable rotatable fan (49) is provided in the passage duct (16) for conveying air from a suction chamber (47) coupled to the waste air inlet (13) to a pressure chamber (48) coupled to the supply air outlet (14). An outside air duct (22) is provided for receiving outside air (27) which is emitted into the passage duct (16), and an exhaust air duct (28) is provided for receiving a part of the waste air (32) extracted from the room for exhaust to the outside. First and second air flow regulators (36, 37) are provided in the respective air ducts (22, 28), and a control unit (68) is provided for controlling operation of the air flow regulators (36, 37) and the rotational speed of the fan (49).