Working Machine Hood Layout for Electrical Device Cooling
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Solution Overview
Problem
Working machines face issues with the durability of electrical devices due to heat accumulation on the swivel base plate and the need to position controllers within the hood without impairing cooler cooling performance.
Innovation Solution
The electrical devices are positioned near the outside air intake port, with a significant portion above the cooling fan or cooler, and are shielded from heat sources, while the controller is located below manipulators and protected by a cover member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the electrical device is installed on the swivel base plate where heat-generating devices are arranged, then the installation space is utilized, but the temperature increases and deteriorates the durability of the electrical device
Solution Approach 1:
The electrical device is extracted from the high-temperature environment on the swivel base plate and relocated to the hood, where it can be cooled by the air intake flow, thereby protecting it from thermal damage while maintaining compact installation
Solution Approach 2:
The hood serves as an intermediary structure that provides a thermally favorable environment for the electrical device by channeling cool air through the air intake port across the device, acting as a heat shield and cooling pathway
2Ease of operation
If the controller is arranged inside the hood, then the installation location is ensured, but the cooling performance of coolers may be impaired
Solution Approach 1:
The hood's internal airflow characteristics are utilized by positioning the controller in a specific local region where cool air from the intake port naturally flows, ensuring both installation feasibility and adequate cooling without blocking cooler pathways
Solution Approach 2:
The controller is positioned in the vertical dimension within the hood, utilizing the three-dimensional space above the cooler but arranged such that it does not obstruct the horizontal airflow path needed for cooling, thereby resolving spatial conflict
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
Enhances the durability of electrical devices and maintains effective cooling performance by optimizing their placement and shielding, thereby improving the overall operational reliability of the working machine.
Implementation Method 1
a cooling fan (100) to generate the cooling air
Implementation Method 2
at least one cooler located upstream of the cooling fan in a direction of flow of the cooling air
Data Source
AI summary
A working machine includes a machine body, a hood to cover a prime mover provided in the machine body, and an electrical device provided inside the hood. The hood includes an outside air intake port to allow cooling air for cooling the prime mover to pass into the hood. The electrical device is located in the vicinity of the outside air intake port such that the electrical device is covered with the hood.