Engineering Vehicle Cab Airflow Split for Driver Comfort
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Solution Overview
Problem
Existing engineering vehicle air conditioning systems face challenges in maintaining consistent comfort for drivers due to fixed air supply ratios and vortex flows, leading to discomfort when the driver changes direction, especially in vehicles like loader-diggers.
Innovation Solution
An air conditioning system with a flow distribution device that adjusts the outlet air volume ratio by moving a flow dividing portion between air outlets, using a driving mechanism and limiting structure to optimize air supply based on driver direction, and incorporates elbow pipes with flow guide plates to reduce vortex noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed air supply ratio is used in the air conditioning system, then the system structure is simple, but the driver comfortability deteriorates when the driver changes direction
Solution Approach 1:
The patent applies the dynamics principle by making the air supply system adjustable through a flow distribution device with a movable flow dividing portion. This component can dynamically change the outlet air volume ratio between front and rear air outlets based on the driver's facing direction, transforming a static fixed-ratio system into a dynamic adaptive system that maintains driver comfortability during direction changes
2Area of stationary object
If air supply ports are arranged at both inner front end and inner rear end of the cab, then air supply coverage is improved, but air distribution uniformity deteriorates due to vortex flows
Solution Approach 1:
The patent applies local quality by introducing flow guide plates at specific locations within the air supply pipelines, particularly at elbow sections. These flow guide plates locally modify the airflow characteristics to reduce vortex flows and improve air distribution uniformity, while maintaining the broad coverage provided by multiple air supply ports distributed throughout the cab
3Adaptability or versatility
If the flow dividing portion is movably arranged to change outlet air volume ratio, then driver comfortability is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the air supply system into separate front and rear air supply pipelines with independent flow control. The flow distribution device is segmented into a flow dividing portion and a driving portion, allowing independent adjustment of air distribution ratios without requiring complete system redesign, thus managing complexity through modular segmentation
Data Source
AI summary
This disclosure provides an engineering vehicle and an air conditioning system thereof beneficial to improve comfortability of drivers. The air conditioning system includes: an air conditioner body, including a shell with first and second air outlets; a first air supply pipeline, a first end of the first air supply pipeline being connected to the first air outlet; first air support port(s), arranged at an inner front end of a cab of the engineering vehicle and connected to a second end of the first air supply pipeline; a second air supply pipeline, a first end of the second air supply pipeline being connected to the second air outlet; second air supply port(s), arranged at an inner rear end of the cab and connected to a second end of the second air supply pipeline; and a flow distribution device including a flow dividing portion located in the shell.