Control Unit Air Passage Rib for Working Machine Cooling
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Solution Overview
Problem
The increasing heat generation in circuit boards due to higher current requirements poses a challenge for effective cooling in control units of working machines, necessitating enhanced cooling capabilities.
Innovation Solution
The configuration includes a rib extending from the partition wall inside the first space, creating an air passage between the control unit and the rib, with the rib positioned closer to the control unit than the thickness of the case, and a heat dissipating part exposed to the air passage, enhancing air flow velocity and heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the circuit board allows greater current to flow through it, then the control capability of the motor is improved, but the heat generation increases and cooling becomes insufficient
Solution Approach 1:
The patent introduces a rib structure that creates a three-dimensional air passage above the control unit, transforming the cooling approach from simple surface exposure to volumetric airflow. The rib extends from the partition wall into the first space, defining an air passage that allows air to flow over the top surface of the control unit, effectively utilizing the vertical dimension for heat dissipation.
Solution Approach 2:
The cooling system is segmented into distinct airflow paths: air enters through the first aperture, flows through the air passage defined by the rib, and exits through the second aperture. This segmentation creates dedicated cooling channels that efficiently manage heat from the control unit without interfering with other components.
2Temperature
If air flows directly over the control unit, then cooling is provided, but the air flow velocity is insufficient for effective heat dissipation
Solution Approach 1:
The rib structure creates a vertical air passage that directs air flow over the top surface of the control unit, utilizing the vertical dimension to increase airflow velocity. The air passage is positioned to allow air to flow along the length of the control unit, maximizing the cooling effect through increased velocity and extended contact time.
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 increases the cooling capability of the control unit by improving air flow velocity and heat dissipation, effectively managing higher heat loads generated by the circuit board.
Implementation Method 1
a fan configured to be driven by the motor and generate an air flow inside a first space
Implementation Method 2
Since heat transference is increased, a cooling capability for the control unit can be enhanced
Data Source
AI summary
A working machine may include: a fan configured to generate an air flow inside a first space; a control unit disposed inside the first space; a partition wall separating the first space from a second space; a first aperture communicating the first space with the second space; and a rib extending from the partition wall and forming an air passage in which the air flow passes, wherein the air passage is positioned between the control unit and the rib. The control unit may include a case housing a circuit board. The control unit may include a first surface facing the rib. In a first direction perpendicular to the first surface, the rib and the first surface may at least partially overlap with each other. A distance between the rib and the first surface may be smaller than a thickness of the case in the first direction.