Work Vehicle Cabin Air Conditioning Layout for Stability and Maintenance

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Solution Overview

Problem

Existing air conditioning devices for work vehicles face difficulties in maintenance due to overlapping components and stability issues caused by a high center of gravity when the engine and air conditioning unit are located in the front and upper regions, respectively.

Innovation Solution

The air conditioning unit is relocated to the lower forward region of the cabin, and the engine is positioned in the rear half of the vehicle body, allowing for easier maintenance and lowering the vehicle's center of gravity, thereby improving stability and air distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the engine and air conditioning unit are located in the front of the vehicle body, then the components are positioned in a limited area, but maintenance becomes difficult due to overlapping and cramming of components

Engineering Contradiction:

Improvecomponent arrangementVSAvoidmaintenance accessibility

Core Design Contradiction:

Ease of manufactureVSEase of repair

Solution Approach 1:

The vehicle body is divided into front half region and rear half region, with the engine placed in the rear half region and the air conditioning unit in the front half region, separating previously overlapping components into distinct spatial zones to improve maintenance accessibility

Inventive Principle:

Principle #1Segmentation

2Ease of operation

If the air conditioning unit is located in the upper portion of the cabin, then the components are positioned for easy access, but the center of gravity becomes high, reducing vehicle stability

Engineering Contradiction:

Improvecomponent accessibilityVSAvoidvehicle stability

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

Instead of placing the air conditioning unit in the upper portion of the cabin as conventionally done, the unit is inverted to the lower forward region of the cabin, which lowers the center of gravity to improve vehicle stability while maintaining serviceability through the lower positioning

Inventive Principle:

Principle #13The other way round (Inversion)

3Device complexity

If the air conditioning unit is located in the upper portion of the cabin, then the component placement is simplified, but conditioned air cannot reach the lower body without extending ducts

Engineering Contradiction:

Improveduct system complexityVSAvoidair distribution effectiveness

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

The air conditioning unit is positioned in the lower forward region of the cabin, creating local quality in terms of air distribution - the lower positioning enables direct airflow to both upper and lower body areas without requiring complex extended duct systems, simplifying the overall device complexity

Inventive Principle:

Principle #3Local quality

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 configuration simplifies maintenance, enhances vehicle stability, and enables efficient air conditioning of both the upper and lower body of the operator without the need for extended ducts, while maintaining a lower center of gravity and improving cooling efficiency.

Implementation Method 1

an air conditioning unit located in a lower forward region of the cabin and having an evaporator and a fan

Methodology Applied

Scientific EffectAir conditioning:

Data Source

PatentUS7913505B2Air conditioning device for work vehicle

Publication Date: 2011.03.29 KUBOTA CORP

AI summary

A work vehicle comprises a plurality of wheels; a vehicle body supported by the plurality of wheels and having a cabin, a front half region and a rear half region; an engine located in the rear half region of the vehicle body; and an air conditioning unit located in a lower forward region of the cabin and having an evaporator and a fan.