Smoke evacuation shutter or fire damper with a roller shutter
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Solution Overview
Problem
Existing smoke evacuation shutters and fire dampers with roller shutter valves require physical stopping means to achieve intermediate positions, which is cumbersome and not easily programmable, especially in space-restricted environments.
Innovation Solution
Incorporating an electric drive system that can move the roller shutter against the spring bias to maintain a predetermined intermediate position between open and closed, eliminating the need for physical stopping means and allowing for automated control through programming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If physical stopping means are used to achieve intermediate positions, then the roller shutter can be positioned at predetermined intermediate positions, but the device complexity increases and programmability is limited
Solution Approach 1:
The patent replaces physical stopping means with an electric drive system that uses electrical signals to position the roller shutter at intermediate positions. The electric drive means includes a motor and control system that can be programmed to move the shutter to specific positions without mechanical stops, thereby improving programmability while reducing mechanical complexity
Solution Approach 2:
The patent introduces an electric drive system as an intermediary between the control signal and the roller shutter. This electric drive means acts as a mediator that translates electrical commands into precise mechanical positioning, enabling programmable control without requiring direct mechanical stopping means in the shutter mechanism itself
2Ease of manufacture
If physical stopping means are mounted in the frame, then intermediate positions are achieved, but the installation complexity and space requirements increase
Solution Approach 1:
The patent eliminates the need for physical stopping means mounted in the frame by using an electric drive system. The electric drive means positions the roller shutter through controlled motor movement rather than mechanical constraints, simplifying frame design and reducing installation complexity while maintaining the ability to achieve intermediate positions
3Ease of operation
If the roller shutter is biased by a spring to the open position, then automatic opening is achieved, but controlled closing to intermediate positions becomes difficult
Solution Approach 1:
The patent introduces an electric drive system as an intermediary that can overcome the spring bias force. The electric drive means includes a motor capable of generating sufficient torque to move the roller shutter against the spring force to predetermined intermediate closing positions, while the spring maintains its function of automatic opening when not actively driven
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 precise and automated control of the roller shutter to intermediate positions, enhancing flexibility and reducing the complexity of mechanical adjustments in smoke evacuation and fire damper systems.
Implementation Method 1
a roller shutter mounted on said frame and configured move between an open position allowing an air flow through said passage and a closed position shutting of the passage, wherein the roller shutter is biased by a spring
Implementation Method 2
the safety device comprises an electric drive means configured to move the roller shutter against the force of said spring
Data Source
Figure 1a~2
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AI summary
A safety device selected from a smoke evacuation shutter or a fire damper, comprising: - a frame defining a passage; - a roller shutter mounted on said frame and configured move between an open position allowing an air flow through said passage and a closed position shutting of the passage, wherein the roller shutter is biased by a spring to - in case of a smoke evacuation shutter - the open position, and - in case of a fire damper - the closed position, characterized in that the safety device comprises an electrical drive means configured to move the roller shutter against the force of said spring and in that the safety device comprises means for maintaining the roller shutter in a predetermined intermediated position between the open position and the closed position, the intermediate position not coinciding with either the open or the closed position.