Adjustable Louver Window System to Block Rain While Allowing Air Flow

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Solution Overview

Problem

There is no device that effectively allows fresh air to flow through a building while keeping rain and other precipitation out, especially during inclement weather, which poses a challenge for maintaining comfort and energy efficiency.

Innovation Solution

The development of the Dry Open Window and Dry Window Fan devices, which utilize various shaped louvers and a mechanized fan to allow air flow while preventing rain and precipitation from entering, with features such as child-proof security, adjustable louvers, and drainage systems to manage collected water.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the window is left open to allow fresh air flow, then natural ventilation and energy efficiency are improved, but rain and precipitation can enter the building during inclement weather

Engineering Contradiction:
Improvenatural ventilation efficiencyVSAvoidrain entry
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

The device divides the window opening into multiple sections using adjustable louvers that can be positioned at different angles. This segmentation allows selective control of air flow paths while blocking rain entry, resolving the contradiction between maintaining open window benefits and preventing rain intrusion.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The louvers are designed to be dynamically adjustable, allowing users to change the angle and position of each louver blade according to weather conditions. This dynamic adjustment enables the system to optimize air flow while blocking rain during inclement weather, and maximize ventilation during clear conditions.

Inventive Principle:
Principle #15Dynamics

2Object-affected harmful factors

If the window is closed to prevent rain entry, then protection from precipitation is improved, but natural ventilation and energy efficiency are reduced

Engineering Contradiction:
Improverain protectionVSAvoidair conditioning energy
Core Design Contradiction:
Object-affected harmful factorsVSLoss of energy

Solution Approach 1:

The louver device acts as an intermediary element installed at the window opening, providing a third option between completely open and completely closed states. This intermediary structure enables selective blocking of rain while maintaining air flow paths, allowing natural ventilation to continue during light rain without requiring full window closure.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The system changes the physical parameters of the window opening by adjusting louver angles and positions. By modifying these parameters dynamically, the system can maintain energy efficiency through natural ventilation while adapting to changing weather conditions to block rain entry when necessary.

Inventive Principle:
Principle #35Parameter changes

3Productivity

If traditional louvered windows are used to allow air flow, then ventilation is improved, but they cannot keep rain out when there is steady wind

Engineering Contradiction:
Improveair flowVSAvoidrain blocking capability
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The louver blades are designed with asymmetric geometry and positioning, where each louver can be angled independently to create overlapping protective surfaces. This asymmetric arrangement blocks wind-driven rain from penetrating while maintaining air flow channels, overcoming the limitation of traditional symmetric louvered windows.

Inventive Principle:
Principle #4Asymmetry

Solution Approach 2:

The device adds a third dimension to traditional louvered windows by incorporating adjustable depth and angular positioning of louver blades. This dimensional enhancement creates multiple layers of protection that can block rain from various wind directions while maintaining ventilation, providing superior reliability compared to flat, fixed louver designs.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS10386090B2Reconfigurable system allowing air flow through an open window while blocking precipitation
Publication Date: 2019.08.20 FANG ZHIHUA
  • US10386090B2 patent drawing
  • US10386090B2 patent drawing
  • US10386090B2 patent drawing

AI summary

This invention relates to two devices that are used to let fresh air in or through a window or opening but at the same time keep rain or any other kind of precipitation out. This is a device that will enable people to keep a window or an opening open even in inclement weather or when precipitation of any kind threatens to enter the opening or window. This is a device that will also save energy as it will significantly decrease the use of air conditioning in homes and offices.