Working Machine Cooling Layout for Controller and Radiator Airflow
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Solution Overview
Problem
Existing working machines face challenges in efficiently cooling controllers and coolers due to the placement of these components, which can lead to reduced cooling efficiency and increased temperatures.
Innovation Solution
The working machine is designed with the cooler and controller positioned upstream of the prime mover in the cooling air flow direction, and the controller is placed not to overlap with the ventilation surface of the cooler, allowing for efficient cooling air distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the controller is disposed to face the ventilation surface portion of the radiator, then the controller can be cooled by cooling air, but the flow of cooling air to the radiator is partially blocked and cooling efficiency of the radiator is reduced
Solution Approach 1:
The controller is positioned in the vertical dimension below the radiator rather than in front of it, allowing cooling air to flow horizontally through the radiator's ventilation surface without being blocked by the controller. The controller receives cooling air from a separate downward flow path, thus resolving the spatial conflict between controller cooling and radiator cooling efficiency.
2Object-affected harmful factors
If the controller is disposed at a position separated from the prime mover, then the controller is protected from direct heat, but the inside of the machine body is likely to be at a high temperature and the controller still requires appropriate heat prevention measures
Solution Approach 1:
A heat insulating member is introduced as an intermediary between the high-temperature prime mover environment and the controller. This heat insulating member blocks heat transfer from the prime mover chamber to the controller chamber, protecting the controller from thermal damage while allowing the prime mover to operate in its high-temperature environment.
3Temperature
If the cooler and controller are disposed upstream of the prime mover in cooling air flow direction, then both can be cooled efficiently before the prime mover, but the space arrangement becomes more constrained
Solution Approach 1:
The cooler and controller are arranged in different vertical levels within the upstream space. The cooler is positioned in the upper region while the controller is positioned in the lower region below it. This vertical stacking in the third dimension allows both components to be cooled efficiently by the cooling air flow while minimizing horizontal space requirements and simplifying the overall spatial arrangement.
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 ensures that both the cooler and controller are efficiently cooled by the cooling air before it reaches the prime mover, enhancing their cooling performance and reducing thermal loads.
Implementation Method 1
a cooling fan to generate cooling air for cooling the prime mover
Implementation Method 2
a cooler having a ventilation surface portion on which the cooling air hits, to cool a coolant to be circulated and supplied to the prime mover
Implementation Method 3
both the cooler and the controller can be efficiently cooled with the cooling air before cooling the prime mover
Data Source
Figure 1
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Figure 3
AI summary
A working machine includes a machine body (2); a prime mover (21) mounted on the machine body (2); a cooling fan (33) to generate cooling air (F1) for cooling the prime mover (21); a cooler (23) having a ventilation surface portion (23F) on which the cooling air (F1) hits, to cool a coolant to be circulated and supplied to the prime mover (21); and a controller (28). The cooler (23) and the controller (28) are disposed upstream of the prime mover (21) in a flow direction of the cooling air (F1). The controller (28) is disposed at a position not overlapping the ventilation surface portion (23F) when viewed in the flow direction of the cooling air (F1).