Construction machine
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Solution Overview
Problem
Construction machines with ventilated seats experience a limited cooling effect due to the positioning of air conditioning devices and nozzles, which results in a less comfortable working environment and reduced work efficiency.
Innovation Solution
The implementation of a construction machine design featuring a ventilated seat with integrated fans, a second duct extending towards the rear side, and a variable second nozzle positioned at the end of this duct to direct cooled air directly to the seat, enhancing airflow and cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the air conditioning device and nozzle are positioned rearward from the seat and spray air toward the upper side of the driver's head, then the air conditioning device can be installed in a compact space, but the cooled air temperature rises significantly during circulation and the ventilated seat effect is reduced
Solution Approach 1:
The air delivery system is segmented into multiple independent ducts: a first duct delivering air to the upper cabin area and a second duct delivering air directly to the ventilated seat. This segmentation allows different air streams to serve different functions, preventing the mixed hot air problem while maintaining compact installation space.
Solution Approach 2:
The second duct acts as an intermediary channel that directly connects the air conditioning device to the ventilated seat, bypassing the general cabin air circulation path. This intermediary duct ensures that cooled air reaches the seat before being heated by cabin air, maintaining the temperature differential needed for effective cooling.
2Ease of operation
If the lower end of the seat is coupled to a suspension, then the seat can be positioned lower for better driver support, but the seat blocks part of the air flow and cooling effect deteriorates
Solution Approach 1:
The second duct is routed to deliver air to the rear side of the ventilated seat, utilizing the lateral and depth dimensions rather than only the vertical dimension. This dimensional change allows air delivery without being blocked by the seat's lower suspension coupling, maintaining effective cooling while preserving driver support comfort.
3Productivity
If a second duct branching to the rear side of the ventilated seat is added, then cooled air can reach the seat more directly, but the device complexity increases
Solution Approach 1:
The second duct serving the ventilated seat is integrated into the existing air conditioning duct system, branching from the first duct. This multi-functional design allows a single duct system to serve both general cabin cooling (first duct) and targeted seat cooling (second duct), reducing overall system complexity compared to completely separate systems.
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 design significantly improves the sensible cooling effect, providing a more comfortable working environment and increasing work efficiency by ensuring cooled air reaches the driver effectively, with a noticeable temperature reduction of 5 to 8 degrees.
Implementation Method 1
ducts extending from the air conditioning device and configured to guide an air flow
Implementation Method 2
an air conditioning device configured to adjust an internal temperature of the cabin
Data Source
Figure 1
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Figure 3
AI summary
The present invention provides a construction machine, which includes a cabin in which a driver is seated, the construction machine including a ventilated seat (110) having fans, an air conditioning device configured to adjust an internal temperature of the cabin, and ducts extending from the air conditioning device and configured to guide an air flow, in which the ducts branches to include a first duct extending toward an upper side of the cabin, and a second duct (230) extending toward a rear side of the ventilated seat. Therefore, it is possible to improve a cooling effect that the driver actually feels.