Construction Machine Cab Duct Layout for Thigh Cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional air conditioning systems for construction machine cabs do not effectively address sweating and discomfort on the operator's thighs, which can occur due to contact with the seat base during operation.
Innovation Solution
The air conditioning system includes a duct with blowing ports positioned to direct cooling air along the sides of the seat base and backrest, ensuring efficient airflow to the operator's thighs and the inner surfaces of control boxes, thereby reducing heat influence and discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cooling air is blown toward windows and headrest areas, then window and headrest comfort is improved, but thigh sweating and damping is not addressed
Solution Approach 1:
The air conditioning system is divided into multiple independent blowing ports: window blowing ports for windows, headrest blowing ports for headrest, and thigh blowing ports for thighs. Each segment addresses specific comfort needs independently, allowing targeted cooling without compromising other areas.
Solution Approach 2:
Different blowing ports are positioned at specific locations to provide localized cooling: window blowing ports near windows, headrest blowing ports near headrest, and thigh blowing ports near thighs. This ensures each body part and surface receives appropriate cooling attention.
2Object-affected harmful factors
If duct blows cooling air forward along seat base and control box, then thigh sweating is suppressed, but system complexity increases
Solution Approach 1:
The duct integrates multiple blowing ports (window, headrest, and thigh blowing ports) into a single unified structure behind the operator seat. This combines multiple functions into one component, reducing overall system complexity while maintaining localized cooling capabilities.
Solution Approach 2:
The single duct structure serves multiple functions by providing cooling to different areas through its various blowing ports. It simultaneously cools windows, headrest, and thighs, making the system more versatile without requiring separate ducts for each function.
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 effectively suppresses sweating and discomfort on the operator's thighs by ensuring targeted and efficient airflow, improving thermal comfort within the cab.
Implementation Method 1
an air conditioner main body for cooling an air
Implementation Method 2
a duct disposed behind the operator seat for guiding a cooling air generated in the air conditioner main body
Data Source
AI summary
A cab for a construction machine includes; an operator seat including a seat base and a backrest; a control box disposed along a lateral side of the operator seat; an air conditioner main body for cooling air; and a duct disposed behind the operator sea for guiding a cooling air generated in the air conditioner main body. The duct has a blowing port provided at such a position as to allow the cooling air to flow frontward along at least one of a lateral side of the seat base and a lateral side of a lower portion of the backrest and along an inner surface of the control box.