Automated Window Ventilation Using Flexible Cable Actuation
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Solution Overview
Problem
Existing indoor air quality monitoring and control systems are complex, expensive, require installation of air-conditioning or ventilation systems, and are not suitable for habitable spaces, with limited remote control capabilities and high maintenance needs.
Innovation Solution
A compact, low-noise, and easily mountable device for automatically opening and closing windows or doors, using a stepper motor and flexible connection with detachable joints, combined with a wireless communication module for remote control, and an indoor air quality management system that includes sensors and a management server for automated ventilation based on threshold values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air-conditioning or ventilation systems are installed to control indoor air quality, then air quality parameters can be maintained within threshold values, but the system becomes expensive, requires wall punching, consumes high power, and needs costly maintenance
Solution Approach 1:
The invention extracts the essential function of air quality control from complex ventilation systems by using simple window/door opening-closing devices actuated by motors, thereby eliminating the need for expensive air-conditioning or ventilation system installations
Solution Approach 2:
The system uses natural air convection caused by temperature differences between indoor and outdoor environments to achieve ventilation automatically, without requiring external power-intensive equipment
2Extent of automation
If sliding sash window opening/closing devices are installed as described in KR20170022019, then automatic ventilation control is achieved, but the windows become more expensive and maintenance becomes difficult
Solution Approach 1:
The opening/closing device is designed as a separate, independently replaceable module that can be easily removed and installed without affecting the window structure, thereby simplifying maintenance and repair operations
Solution Approach 2:
The device is designed to be universally applicable to various window and door types, allowing a single standardized component to serve multiple functions and applications, reducing customization costs and maintenance complexity
3Ease of operation
If a chain mechanism is used in the opening/closing device as described in CN109197271, then the window can be opened and closed, but the device is noisy and the chain cannot bend in more than one plane, limiting mounting options
Solution Approach 1:
The invention replaces the noisy chain mechanism with a motor-driven system that uses a flexible cable or belt, eliminating the mechanical noise generated by chain links while maintaining the opening/closing function
Solution Approach 2:
The use of a flexible cable or belt instead of a rigid chain allows the mechanism to bend in multiple planes, providing greater mounting flexibility and reducing noise while maintaining operational effectiveness
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 provides efficient, quiet, and cost-effective indoor air quality management with easy installation, reducing harmful substances and noise levels by natural convection, suitable for various door and window designs, and enabling remote control via the Internet.
Implementation Method 1
a stepper motor with an electronic control unit
Implementation Method 2
means for transforming the motor's rotational motion into linear motion
Implementation Method 3
an extended flexible connection that is rigid in its extension direction but is flexible in more than one direction transversely to its extension said directions laying in different planes; the flexible connection is located in a leading groove in the housing with at least one curved section for changing the direction of movement of the flexible connection
Implementation Method 4
The flexible connection may be connected to the support element through a detachable joint
Data Source
AI summary
The invention relates to a device for automatically opening or closing a window or a door and system and method for controlling and managing indoor air quality via the Internet. The system monitors indoor air parameters through sensors, and when these parameters reach predefined user thresholds, provides room ventilation through natural air convection by automated opening/closing of doors and/or windows. The automatic opening/closing device (26) consists of a housing with means for fixed attachment to a window or a door. The housing hosts: a stepper motor (16) and a means for transforming the rotary motion into a linear motion (9, 13) which drives an extended flexible connection (10, 11). The flexible connection (10, 11) pushes or pulls a support element (1) which is mounted on a window/door, thereby opening the window or door.