Pivotable Air Guide for Work Vehicle Cabin Fog Prevention
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Solution Overview
Problem
Conventional cabin air conditioning systems for work vehicles require complex constructions and high precision in air guiding due to the need for controlled air distribution, which is inefficient and increases complexity.
Innovation Solution
A pivotable air guide within the air distribution duct allows for controlled orientation of the air inlet opening, enabling precise and adjustable air flow to specific areas, such as the side door glass sheet, to prevent fogging and improve visibility by pivoting between upstream and downstream orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a shutter damper or wind deflector is provided at the air outlet to control conditioned air supply, then the precision of air delivery to desired areas is improved, but the device complexity increases due to additional components and pivotal operation mechanisms
Solution Approach 1:
The patent extracts the air flow control function from the complex shutter damper mechanism and implements it through a simple movable air guide that can be positioned to direct air flow. The air guide is a separate component that can be moved to different positions (first position for directing air to side window glass, second position for other areas) without requiring dampers, actuators, or complex pivotal mechanisms.
Solution Approach 2:
Instead of controlling air flow by blocking it with dampers at the outlet, the invention inverts the approach by using a movable air guide to actively direct the air flow to desired areas. The control is achieved by positioning the air guide in different locations within the duct rather than by closing mechanisms at the outlet.
2Measurement precision
If high precision guiding components like wind deflectors are used to supply conditioned air to desired portions, then the precision of air delivery is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The air guide is designed as a simple, inexpensive component that can be easily manufactured and replaced if needed. It does not require complex materials or precision manufacturing processes, making it economically advantageous compared to expensive guiding components with high precision requirements.
3Adaptability or versatility
If shutter dampers or wind deflectors are installed to control air supply, then the ability to stop air feeding to specific areas is improved, but the device complexity increases due to additional components
Solution Approach 1:
The air guide structure is designed to be movable and positionable, allowing it to self-adjust the air flow distribution according to different operational needs. The simplicity of the structure enables easy manual or automated positioning without requiring complex control systems, actuators, or multiple components.
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
This solution simplifies the air distribution system by allowing controlled and adjustable air feeding, effectively eliminating fogging on glass surfaces and improving visibility without the need for complex components like shutter dampers or wind deflectors, while maintaining precision in air delivery.
Implementation Method 1
the inlet opening of the air guide assumes an upstream orientation with respect to a direction of air flow within the air distribution duct when the air guide is in the use condition whereas the inlet opening of the air guide assumes a downstream orientation with respect to the direction of air flow within the air distribution duct when the air guide is in the non-use condition
Data Source
AI summary
A cabin for a work vehicle, comprising: a ceiling portion; an air conditioner provided to the work vehicle; an air distribution duct provided to the ceiling portion for communicating conditioned air from the air conditioner to the cabin; an air guide projecting into the air distribution duct at an intermediate portion of the duct and forming an inlet opening in a lateral face of a projecting portion of the air guide; and an outlet portion extending to outside the duct and having an opening for introducing the conditioned air from the inlet opening into the cabin. The air guide is pivotable between a use condition and a non-use condition where the inlet opening is oriented differently from an orientation of the inlet opening when the air guide is in the use condition. The air guide is pivotable about an axis such that the inlet opening of the air guide assumes an upstream orientation with respect to a direction of air flow within the air distribution duct when the air guide is in the use condition whereas the inlet opening of the air guide assumes a downstream orientation with respect to the direction of air flow within the air distribution duct when the air guide is in the non-use condition.