Construction Machine Cab Side Duct Layout for Clear Side Windows
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Construction machines, such as hydraulic excavators, face challenges in maintaining inner cab space while reinforcing side walls and ensuring operator visibility due to the arrangement of air conditioning ducts and side beams, which often results in reduced space and potential frosting or fogging of side windows.
Innovation Solution
A cab design featuring a side beam extending along the right wall below the side window frame, with a side duct located above the beam and extending in the front-rear direction, incorporating a guide duct to direct air from the air conditioner unit to the side duct vents near the transparent plates, thereby avoiding the need for upward extension ducts and minimizing space reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the side duct is arranged below the side beam to extend in the front-rear direction, then the side wall is reinforced and the duct can be installed, but the distance from the transparent plate to the duct increases making it difficult to prevent frosting
Solution Approach 1:
The side duct is positioned above the side beam rather than below, changing the vertical dimension arrangement. This allows the duct to be closer to the transparent plate in the vertical direction while the side beam provides reinforcement below, resolving the contradiction between structural strength and anti-frosting effectiveness.
Solution Approach 2:
The side beam acts as an intermediary element positioned between the side duct and the lower section of the cab. The duct is arranged above the beam, and the beam extends in the front-rear direction, creating a spatial relationship where the duct can vent air near the transparent plate without compromising the side wall reinforcement function of the beam.
2Object-affected harmful factors
If an extension duct is provided to extend upward from the side duct to position the vent near the transparent plate, then frosting is suppressed, but the amount of air blown out decreases
Solution Approach 1:
Instead of extending the duct upward in the vertical direction, the side duct is positioned above the side beam to achieve the necessary height. This eliminates the need for an extension duct while maintaining adequate distance to the transparent plate for effective frosting prevention and preserving the air flow quantity.
3Object-affected harmful factors
If the side duct is arranged adjacent to the side beam at a left position, then the vent can be near the transparent plate, but the side beam and duct protrude inward narrowing the inner space
Solution Approach 1:
The side duct is arranged in the vertical dimension above the side beam rather than in the horizontal dimension adjacent to it. This vertical stacking arrangement eliminates the protrusion into the inner space that would occur with horizontal placement, while still positioning the duct adequately near the transparent plate through its elevated position.
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 the narrowing of the cab's inner space, reinforces the side wall, and ensures visibility by directing conditioned air efficiently to the side windows, preventing frosting or fogging and enhancing operator comfort and safety.
Implementation Method 1
a side duct (60) located above the side beam (20), extending in a front-rear direction along a lower section (81) of the side window frame (80), and receiving at least a part of the air blown out from the air conditioner unit (30)
Data Source
AI summary
A cab for a construction machine includes: a specified side wall having a side window frame defining a side window and at least one side transparent plate supported by the side window frame; an air conditioner unit having an air conditioner outlet hole; a side beam extending in a front-rear direction along the specified side wall and below the side window frame; and a side duct located above the side beam, extending in the front-rear direction along a lower section of the side window frame, and receiving at least a part of the air blown out from the air conditioner unit, the side duct having at least one side duct vent for blowing out the air toward the at least one side transparent plate.