Automatic Door Auxiliary Control for Fire Barrier Closure
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Solution Overview
Problem
Existing automatic door systems, such as sliding doors, are not suitable for use as fire barriers in buildings as they lack the necessary mechanisms to ensure fire protection without additional mechanical means, such as spring accumulators or weight accumulators.
Innovation Solution
An additional control system is introduced that separates the drive train from the basic door control, allowing immediate closure of the door upon a fire signal, operating independently to ensure the door functions as a fire protection barrier without mechanical energy storage, using redundant components for reliability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an automatic door system uses basic door control with drive train connection, then the door can operate in normal automatic mode, but it cannot immediately close upon fire signal without delay
Solution Approach 1:
The control system is segmented into two independent parts: basic door control and auxiliary fire control. The auxiliary fire control can independently activate the drive train without going through the basic control logic, enabling immediate door closure upon fire signal detection.
Solution Approach 2:
The auxiliary fire control is pre-configured with direct connection to the drive train and fire signaling devices. When a fire signal is detected, the preliminary setup allows immediate activation of the closing mechanism without waiting for basic control processing.
2Reliability
If mechanical energy storage devices like spring accumulators are added to ensure fire door closure, then fire protection capability is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent replaces mechanical energy storage devices (spring accumulators, weight accumulators) with an electrically controlled drive train system. The drive train is kept ready through electrical control rather than mechanical pre-loading, reducing device complexity while maintaining fire door closure capability.
Solution Approach 2:
The drive train serves dual purposes: normal automatic door operation through basic control and emergency fire door closure through auxiliary fire control. This eliminates the need for separate mechanical energy storage devices dedicated solely to fire protection.
3Object-affected harmful factors
If presence sensors are actively monitored during fire door closure, then safety is improved, but closure speed is reduced due to continuous monitoring
Solution Approach 1:
During fire door closure, the auxiliary fire control applies partial monitoring of presence sensors rather than full active monitoring. This allows the door to close quickly while still providing basic safety monitoring, balancing speed and safety requirements.
Data Source
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AI summary
The invention relates to an automatic door, such as a sliding door, a revolving door, or the like, comprising at least one door leaf which can be driven by a control unit (1) via a drive device, and wherein presence sensors (12) are provided on the inside and/or outside of the automatic door for monitoring the door's passage area. According to the invention, the automatic door has, in addition to a basic control unit (4), an auxiliary control unit (5) which is connected to a signaling device, for example, a fire alarm control panel or a smoke detector, and which, independently of the basic control unit (4), immediately triggers the closing movement upon receiving a signal from the signaling device.