Suction Cup Fire Door Holder Pneumatic Release
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Solution Overview
Problem
Conventional electromagnetic safety stop devices for fire barrier doors consume excessive energy to maintain the door in an open position and lack efficiency in emergency power failures.
Innovation Solution
A safety stop device utilizing a suction cup and pneumatic mechanism, where the electromagnet holds a valve closed to minimize power consumption, and the suction cup provides the necessary force to keep the door open, with a spring-assisted release in emergencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electromagnetic stop devices are used to hold the door in an open position, then the door can be reliably held open, but excessive energy is consumed to maintain the electromagnetic coil assembly under voltage
Solution Approach 1:
The patent replaces the electromagnetic holding mechanism with a suction cup-based pneumatic system. The suction cup creates a vacuum seal against the door surface, using atmospheric pressure to hold the door open. This mechanical/pneumatic substitution eliminates the need for continuous electromagnetic field generation, thereby resolving the contradiction between reliable door holding and excessive energy consumption.
Solution Approach 2:
The invention employs a suction cup that utilizes pneumatic pressure differential to hold the door in the open position. By creating a vacuum inside the suction cup, the atmospheric pressure outside pushes against the door, maintaining it in the open state without requiring continuous electrical power. This pneumatic approach directly addresses the energy consumption issue while maintaining holding reliability.
2Reliability
If electromagnetic stop devices are used to hold the door open, then the door remains securely positioned, but the device becomes complex and expensive
Solution Approach 1:
The patent simplifies the device by replacing the complex electromagnetic coil assembly with a simple suction cup mechanism. The suction cup requires no electrical components, motors, or control systems, reducing device complexity while maintaining the ability to hold the door in the open position through pure mechanical/pneumatic means.
Solution Approach 2:
The invention uses a simple, inexpensive suction cup as the core holding mechanism. This basic pneumatic component is far cheaper and simpler than electromagnetic assemblies, aligning with the principle of using simple, readily available elements to achieve the desired function without complex or expensive components.
3Duration of action of stationary object
If electromagnetic stop devices are used, then the door can be held open during normal operation, but the device fails to respond quickly enough in emergency power failures
Solution Approach 1:
The suction cup mechanism is self-actuating in emergency situations. When power fails or the alarm triggers, the suction cup automatically loses its vacuum seal and the door springs close without requiring any active control or additional power. This passive, self-service mechanism ensures immediate response in emergencies, contrasting with electromagnetic systems that require active control and may delay response.
Solution Approach 2:
Instead of using active electromagnetic force to hold the door open and requiring active deactivation to close it, the invention uses passive atmospheric pressure through the suction cup to hold the door open, allowing the door to close automatically when the suction is lost. This inversion of the control logic enables faster, more reliable emergency response.
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 significantly reduces power consumption for maintaining the door open and ensures reliable emergency release with minimal power drain, using easily available materials and being economically competitive.
Implementation Method 1
a suction cup (8) associated to a door (9), wherein a pressure difference holds the door in an opened position
Implementation Method 2
an electromagnet (3), consisting of an electromagnet coil (4) and an electromagnet core (5)... the electromagnet (3) holds a valve closed
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A safety stop device (1), for fire barrier doors, comprising suction cup means (8) associated with a fire barrier door (9) and cooperating with a wall (7)associated with a fixed body, said suction cup means forming a negative pressure chamber (10) with said wall which comprises an outlet hole coupled to a valve (11) controlled by a valve electromagnet (3) thereby, as electric power is switched on, said electromagnet restrains said valve thereby closing a communication between the negative pressure chamber and outside environment, whereas, as electric power is switched off, said electromagnet releases said valve thereby communicating said negative pressure chamber with the outside environment, while disengaging the suction cup means from the fixed body.