Work Vehicle Cab Air Duct Layout for Dual-Side Airflow
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Solution Overview
Problem
Installing multiple ducts in a work vehicle cab is challenging due to space constraints, often resulting in cool air being blown from only one side, which is less comfortable for the driver.
Innovation Solution
A configuration with a first and second blowing section, a distribution box, and ducts that supply air from an air-conditioning unit to both sides of the cab, reducing horizontal space requirements and maintaining airflow balance using a partition plate and heat-insulating materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple ducts are installed to blow cool air from both sides, then driver comfort is improved, but space inside the cab body is reduced
Solution Approach 1:
The distribution box utilizes the vertical dimension by opening the second vent downward, allowing the second duct to extend toward the second side below the seat level. This three-dimensional routing arrangement enables dual-side airflow without occupying additional horizontal space within the cab body, thereby maintaining driver comfort while preserving cab interior volume.
Solution Approach 2:
The second duct is arranged to extend below the seat, nesting the duct path within the existing structural space under the seat. This nesting approach allows the duct to reach the second blowing section without reducing the usable space inside the cab body, as the duct occupies space that would otherwise be unused.
2Ease of operation
If ducts are routed to both sides of the cab, then airflow distribution is improved, but installation complexity increases
Solution Approach 1:
The distribution box serves as a multi-functional component that consolidates airflow distribution to both sides. By centralizing the air intake and distribution logic in one location, the system simplifies installation while achieving balanced airflow distribution, as the distribution box manages both duct connections from a single point.
Solution Approach 2:
The distribution box acts as an intermediary component between the air-conditioning unit and the two blowing sections. It mediates the airflow path, providing a centralized connection point that simplifies duct routing and installation while ensuring proper airflow distribution to both sides of the cab.
3Volume of moving object
If the second vent opens downward to reduce horizontal space, then space efficiency is improved, but airflow balance becomes difficult
Solution Approach 1:
The partition plate modifies the airflow parameters by directing and balancing the air flow paths. It adjusts the distribution of air between the two vents despite the second vent opening downward, ensuring that airflow balance is maintained through parameter control rather than geometric symmetry.
Solution Approach 2:
The partition plate creates local flow control within the distribution box, directing air specifically toward the second vent while maintaining overall balance. This localized flow management compensates for the downward orientation of the second vent, ensuring proper airflow distribution without requiring symmetric vent placement.
Data Source
AI summary
A first blowing section is arranged inside a cab body on a right side, and blows cool air or warm air. A second blowing section is arranged inside a cab body on a left side, and blows cool air or warm air. An inlet, a first vent, and a second vent are formed in a box body of a distribution box. The inlet opens toward the left side and introduces cool air or warm air from an air-conditioning unit. The first vent opens toward the right side. The second vent opens downward. A first duct, which is connected to the first vent, supplies the first blowing section with cool air or warm air. A second duct, which is connected to the second vent and extends beneath a seat, supplies the second blowing section with cool air or warm air.