Sensorized Door Closer for Smoke Pressure Peak Prevention
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Solution Overview
Problem
Smoke protection pressure systems in buildings experience pressure peaks when doors close due to delayed reduction in system performance, leading to potential damage and safety risks from sudden pressure changes.
Innovation Solution
A door closer that measures the door's opening angle and transmits this information to the smoke protection pressure system, allowing for immediate adjustment of its performance to prevent pressure peaks by reducing the system's output as the door closes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the smoke control pressure system maintains overpressure in the protected area, then smoke prevention is effective, but pressure peaks occur when doors close causing damage and safety risks
Solution Approach 1:
The door closer detects the door closing process in advance and transmits this information to the smoke control pressure system before the door actually closes. This allows the system to reduce its output proactively, preventing the pressure peak from occurring in the first place rather than reacting after the pressure has already built up
Solution Approach 2:
The door closer acts as a feedback mechanism that continuously monitors door position and communicates this state to the smoke control pressure system. This closed-loop feedback enables the system to adjust its output dynamically based on real-time door status, coordinating pressure reduction with the door closing process to eliminate harmful pressure peaks
2Object-affected harmful factors
If the smoke control pressure system output is reduced immediately when door closing is detected, then pressure peaks are prevented, but the system response time must be optimized to coordinate with door closing speed
Solution Approach 1:
The door closer serves as an intermediary device between the mechanical door closing action and the pneumatic smoke control system. It translates mechanical door position into signals that the pressure system can understand and act upon, facilitating coordinated operation without requiring direct complex integration between the door mechanism and pressure control system
Solution Approach 2:
The door closer detects and signals door closing behavior in advance, allowing the smoke control pressure system to begin reducing its output before the door fully closes. This preliminary action ensures smooth coordination between the mechanical closing process and pneumatic pressure reduction, avoiding sudden transitions that would create pressure peaks
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 effectively reduces or eliminates pressure peaks by synchronizing the smoke protection pressure system's performance with the door's closing process, preventing damage and ensuring safer operation.
Implementation Method 1
the door closer has a linear sensor (6) for measuring the linear position of the arm (2) or the component connected to it relative to the housing (1)
Implementation Method 2
the door closer has a rotation angle sensor (7) for measuring the rotation angle of the arm (2) or the component connected to it relative to the housing (1)
Implementation Method 3
The actuating unit 3 comprises at least one spring 3a, 3b which exerts a rotational, tensile, or compressive force on the arm 2, thereby always forcing the door towards the closed position
Implementation Method 4
the smoke control pressure system maintains a defined overpressure within them, thus preventing smoke from entering
Data Source
Figure 1a
Figure 1b
Figure 2a
AI summary
The invention relates to a door closer comprising a housing (1), an arm (2) connected to the housing (1), and an actuating unit (3) for exerting a rotary, tensile, or compressive force on the arm (2), characterized by a linear sensor (6) or a rotary angle sensor (7) for measuring the linear position or rotary position of the arm (2) relative to the housing (1). The invention also relates to a method for controlling a smoke control pressure system for keeping a protected area of a building free of smoke, wherein the protected area has at least one door equipped with the door closer according to the invention.