Clean Room Ventilation Layout With Integrated Airflow Control
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Solution Overview
Problem
Conventional ventilation systems for clean rooms are complex, costly to install and maintain, and require significant space, making them inefficient and difficult to operate, especially when dealing with diverse ventilation requirements across different applications and cleanliness classes.
Innovation Solution
A compact ventilation device with integrated functional units, including a fan, outside air duct, exhaust air duct, and control system, which allows for variable airflow regulation and precise control of air quality, temperature, and pressure, using a brushless EC motor and differential pressure sensors to maintain optimal conditions within clean rooms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional distributed ventilation systems with multiple functional units are used, then air exchange and control functions are achieved, but device complexity and installation cost increase significantly
Solution Approach 1:
The patent combines multiple functional units (fan, filter means, volumetric flow controllers, control device) into a single integrated ventilation device. This merging eliminates the need for separate distributed functional units and their complex interconnections, directly resolving the contradiction by maintaining high air exchange capability while significantly reducing system complexity and installation burden.
Solution Approach 2:
The integrated ventilation device performs multiple functions simultaneously: air intake, filtration, fan-driven air movement, volumetric flow control, and differential pressure monitoring. This multi-functionality allows a single device to replace what previously required multiple separate units, achieving both high productivity and reduced device complexity.
2Ease of operation
If multiple separate functional units are distributed in an intermediate ceiling area, then ventilation functions are provided, but space requirements and installation effort increase
Solution Approach 1:
By consolidating all ventilation functions into a single compact device, the patent dramatically reduces the ceiling space required compared to distributed functional units. The integrated design maintains ease of operation through built-in control capabilities while minimizing the physical footprint in the intermediate ceiling area.
3Reliability
If conventional distributed systems with separate control systems are used, then parameter control is achieved, but maintenance difficulty and commissioning cost increase
Solution Approach 1:
The patent integrates the control device directly within the ventilation unit, combining reliability-critical control functions with the mechanical ventilation components in a single maintainable unit. This eliminates the need for separate control systems and reduces maintenance complexity while maintaining reliable parameter control through the integrated design.
4Adaptability or versatility
If fan filter units with external air conditioners are used, then supply and exhaust air functions are provided, but connection complexity and space requirements increase
Solution Approach 1:
The patent integrates the functions previously requiring separate fan filter units and external air conditioners into a single self-contained device. This maintains ventilation function flexibility through the integrated design while eliminating the complex connections and spatial relationships between separate units.
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 provides a space-saving, efficient, and easy-to-maintain ventilation system capable of meeting diverse clean room requirements, ensuring high air exchange rates, precise control of air quality, and adaptable to different cleanliness classes, reducing installation and operational complexities.
Implementation Method 1
a fan (49) arranged in the passage channel in order to convey air from a suction-side chamber (47) connected in terms of flow to the exhaust air inlet (13, 29) to a pressure-side chamber (48) connected in terms of flow to the supply air outlet (14, 35)
Implementation Method 2
the filter means (15, 55) clean the air as it flows through the through-channel and make it germ-free
Implementation Method 3
The drive device (54) for the fan (49) is formed by a brushless, electronically commutated DC motor (EC motor)
Implementation Method 4
using a brushless EC motor and differential pressure sensors to maintain optimal conditions within clean rooms
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A ventilation device, particularly for supplying air to and extracting air from clean rooms, has a housing (2), in the interior (12) of which the following are arranged: a passage duct (16) that extends from a waste air inlet (13) provided on the housing (2) through the interior (12) to a supply air outlet (14) provided on the housing (2); a fan (49) 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), the speed of the fan (49) being controllable; an outside air duct (22) fluidically connected to an outside air connection (19) that is provided on the housing (2) and has an outside air outlet (23) in order to emit outside air into the passage duct (16), a first volume flow regulator (36) being installed in the outside air duct (22); an exhaust air duct (28) having an exhaust air inlet (29) fluidically connected to the passage duct (16) in order to receive a part of the waste air discharged (32) from the room as exhaust air (33) and an exhaust air connection (21) provided on the housing (2) in order to convey the received exhaust air out of the housing (2) to the outside, a second volume flow regulator (37) being installed in the exhaust air duct (28); and a control unit (68) for controlling the operation of the first and second volume flow regulators (36, 37) and the speed of the fan (49).