Vehicle Window Condensation Control Using Camera-Guided HVAC

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Solution Overview

Problem

Current systems for mitigating window condensation in vehicles require driver input and may not effectively balance airflow across multiple windows, leading to unbalanced condensation buildup.

Innovation Solution

A system comprising an interior camera, a HVAC system, and a controller that uses machine learning algorithms to detect window opacity and adjust HVAC airflow to mitigate condensation, while also activating heating elements for rear and side windows as needed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If HVAC systems direct airflow to the interior surface of windows to mitigate condensation, then condensation formation is reduced, but driver input and adjustment are required which increases operational complexity

Engineering Contradiction:
Improvecondensation formationVSAvoiddriver input requirement
Core Design Contradiction:
Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The system uses interior cameras to automatically detect window opacity and the controller autonomously adjusts HVAC airflow without requiring driver input. The system serves itself by monitoring condensation conditions and independently making corrections to maintain clear windows.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system continuously monitors window opacity using interior cameras and uses this feedback to automatically adjust HVAC airflow. The controller receives real-time opacity data and dynamically modifies airflow distribution to prevent condensation, creating a closed-loop control system.

Inventive Principle:
Principle #23Feedback

2Object-affected harmful factors

If HVAC systems direct airflow to mitigate condensation, then condensation is reduced, but unbalanced buildup of condensation across multiple windows occurs

Engineering Contradiction:
Improvecondensation formationVSAvoidbalanced condensation distribution
Core Design Contradiction:
Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The system monitors opacity of each window individually and directs HVAC airflow to specific windows based on their local condensation conditions. The controller adjusts airflow distribution across different HVAC outlets according to the specific needs of each window, providing localized treatment rather than uniform airflow.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The system dynamically changes airflow parameters (volume, direction, temperature) to different HVAC outlets based on real-time opacity measurements of individual windows. The controller modulates airflow distribution to match the varying condensation conditions across different windows, achieving balanced condensation control.

Inventive Principle:
Principle #35Parameter changes

3Object-affected harmful factors

If manual HVAC adjustment is used to mitigate condensation, then some condensation control is achieved, but the system lacks automation which reduces productivity

Engineering Contradiction:
Improvecondensation mitigationVSAvoidautomated detection and response
Core Design Contradiction:
Object-affected harmful factorsVSProductivity

Solution Approach 1:

The system replaces manual mechanical adjustment of HVAC controls with an automated optical detection and electronic control system. Interior cameras detect window opacity and the controller automatically adjusts HVAC airflow, substituting driver action with automated sensing and actuation.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system performs automated detection of window condensation conditions and independently adjusts HVAC airflow without requiring driver intervention. The monitoring and control functions serve themselves, eliminating the need for manual operation and improving system productivity.

Inventive Principle:
Principle #25Self-service

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 system automatically detects and mitigates window condensation, improving driver safety by maintaining a clear field of view and optimizing HVAC airflow for effective condensation reduction.

Implementation Method 1

Condensation forming on windows of a vehicle may obstruct the driver's field of view

Methodology Applied
Scientific EffectCondensation: Condensation

Implementation Method 2

a first heating element positioned on the vehicle interior surface adjacent to a first window of the vehicle

Methodology Applied
Scientific EffectHeating: Heating

Data Source

PatentUS12269314B2Detecting and mitigating window condensation
Publication Date: 2025.04.08 GM GLOBAL TECHNOLOGY OPERATIONS LLC
  • US12269314B2 patent drawing
  • US12269314B2 patent drawing
  • US12269314B2 patent drawing

AI summary

A system for detecting and mitigating window condensation for a vehicle includes an interior camera and a heating, ventilation, and air conditioning (HVAC) system. The system also includes a controller in electrical communication with the interior camera and the HVAC system. The controller is programmed to determine an opacity of a first window of the vehicle using the interior camera, compare the opacity of the first window to an opacity threshold, and adjust the HVAC system to decrease the opacity of the first window of the vehicle in response to determining that the opacity of the first window is greater than or equal to the opacity threshold.