Window Closure Motor Speed Control for Noise Reduction
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Solution Overview
Problem
Electric motor-operated closure systems for windows and doors are noisy, particularly at night, disrupting sleep and causing disturbances in quiet environments like classrooms, especially when multiple units are activated simultaneously.
Innovation Solution
A closure system with a mode selection module that uses a real-time clock to switch between two operating modes, reducing noise emissions by controlling the electric motor's speed, with the option to program desired switching times via a user interface, and the ability to modify power consumption by adjusting current strength, voltage, or frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the electric motor operates at high speed to ensure rapid locking/unlocking, then the response time is improved, but the noise emissions increase and disturb sleep and classroom lessons
Solution Approach 1:
The motor speed is made dynamically adjustable based on the time of day. The control device switches between a first operating mode (higher speed) during daytime and a second operating mode (lower speed) during nighttime, allowing the system to adapt its performance characteristics to different environmental conditions and resolve the contradiction between speed and noise
Solution Approach 2:
The operating parameters of the motor, specifically the rotation speed, are changed based on temporal conditions. By detecting whether it is day or night and adjusting the motor speed accordingly, the system optimizes the balance between rapid operation and noise reduction, eliminating the harmful effect of nighttime noise while maintaining daytime responsiveness
2Reliability
If multiple locking units are installed on a window to provide comprehensive security, then the security function is improved, but the total noise disturbance increases when all units operate simultaneously
Solution Approach 1:
Each locking unit is equipped with an independent control device that can operate in different modes based on temporal conditions. When multiple units are present, the system dynamically adjusts individual unit operations to avoid simultaneous high-speed operation, thereby maintaining comprehensive security while reducing cumulative noise disturbance
3Reliability
If the electric motor operates at high power to ensure reliable locking, then the locking reliability is improved, but the power consumption increases
Solution Approach 1:
The motor power consumption is adjusted by changing operating parameters based on temporal conditions. During nighttime, the control device operates the motor at reduced power levels sufficient for reliable locking without requiring maximum power, thereby maintaining locking reliability while reducing energy consumption. The system determines appropriate power levels by detecting time of day and adjusting motor operation accordingly
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a closure system (10) for a window, a door, or the like. The window, the door, or the like has a frame and a leaf which can be moved relative to the frame. The closure system (10) comprises a closure unit (12) with a closure element (16) which can be moved between a first and at least one second position and by means of which the leaf can be secured to the frame if needed. In addition, the closure unit (12) has an electric motor (22) which is drivingly coupled to the closure element (16) in order to move the closure element (16) between the two closure element positions. Furthermore, a controller (28) which is coupled to the electric motor (22) is provided for actuating the electric motor (22), said controller having a first operating mode and at least one second operating mode and being designed to actuate the electric motor (22) such that the electric motor drives the closure element (16) at different speeds according to the respective operating mode.