Pivotable Lintel Sealing Device for Clean Room Doors
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Solution Overview
Problem
Existing lifting door arrangements in clean room applications face challenges in maintaining high tightness and minimizing lintel height while avoiding damage to the door leaf and reducing maintenance efforts, as conventional sealing devices often result in scratches and limited usable door height due to the protrusion of end plates into the door opening.
Innovation Solution
The lifting door arrangement features a pivotable lintel sealing device that moves away from the door leaf plane when opened, allowing the end plate to be pivoted outside the door opening, thus avoiding obstruction and enabling full use of the door height, with a flexible curtain design for easy cleaning and reduced friction noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sealing device with spring elements is used to maintain tightness, then sealing effectiveness is improved, but the door leaf surface is scratched and damaged
Solution Approach 1:
The sealing device is designed to be movable rather than fixed, allowing it to dynamically adjust its position. The seal can move away from the door leaf when the door is open and return to contact the door leaf when closed, preventing continuous scratching while maintaining sealing effectiveness when needed
Solution Approach 2:
The sealing device operates periodically - contacting the door leaf only during the closed position to maintain sealing, and retracting during the open position to avoid damage. This periodic contact pattern eliminates continuous abrasion while preserving sealing functionality
2Strength
If the end plate is designed with large dimensions to ensure stability, then structural strength is improved, but the usable door height is reduced due to protrusion into the door opening
Solution Approach 1:
The end plate is designed to be pivotable rather than fixed, allowing it to change its position dynamically. When the door opens, the end plate pivots outward away from the door opening, clearing the path and maximizing usable height. When closed, it returns to its stabilizing position
Solution Approach 2:
The end plate movement is transitioned from a linear protrusion into the door opening to a rotational movement in a different dimension. By pivoting on a horizontal axis, the end plate moves laterally outward instead of vertically into the opening, preserving door height while maintaining stability
3Reliability
If a fixed sealing device is used to maintain constant contact with the door leaf, then sealing tightness is improved, but friction noise and wear increase
Solution Approach 1:
The sealing device transitions from a fixed, continuously contacting design to a movable design that maintains contact only when necessary. The seal moves with the door motion and contacts the door leaf primarily in the closed position, significantly reducing friction-related noise and wear while maintaining sealing tightness
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
This design enhances the sealing effect, reduces the risk of damage to the door leaf, maintains maximum passage height, and minimizes friction noise and wear, while allowing for easy cleaning and reduced maintenance, making it suitable for clean room applications.
Implementation Method 1
at least part of the door lintel sealing device is held pivotably via a hinge
Implementation Method 2
a flexible curtain design for easy cleaning and reduced friction noise
Data Source
AI summary
The present invention relates to a lifting door assembly (1A), in particular a clean-room door assembly, comprising a lifting door (2), which has a door leaf (3), an end plate (4), and a door leaf accommodating device (5). The lifting door assembly (1A) also contains a door lintel sealing device (20A), which is provided in the area of a door lintel in such a way that the door lintel sealing device produces a sealing effect between the lifting door (2) and the door lintel. At least one part (10B) of the door lintel sealing device (20A) is pivotably retained by means of a hinge and, when the lifting door (2) is opened, can be pivoted from a door leaf plane by an actuating device in the area of the end plate (4) in such a way that the end plate (4) is arranged substantially completely outside the area of a door opening (O) in the opened state of the lifting door (2). By means of the invention, a lifting door assembly (1A) can be improved in such a way that the entire passage height of the door opening (O) can be used with the lifting door assembly and furthermore an adequate sealing effect is achieved when the lifting door (2) is closed.