Choke Coil Module Vertical Airflow Heat Dissipation
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Solution Overview
Problem
High power density DC-AC power inverters face overheating issues due to concentrated heat in choke coils and transistors, which can lead to device failure, as the existing designs hinder effective heat radiation in limited spaces.
Innovation Solution
A choke coil module with a casing featuring air inlets, outlets, and a fan unit, along with a design that includes a bottom plate, upright posts, and top plate with heat radiating holes and spaces to create an air guide passage for efficient heat dissipation, allowing heat to be expelled outside through airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the choke coil is horizontally arranged in limited space, then the device compactness is improved, but the heat radiation efficiency deteriorates
Solution Approach 1:
The patent introduces a vertical dimension for heat dissipation by creating an air guide passage that extends from the bottom plate upward through the choke coil assembly to the top plate. This three-dimensional airflow path allows heat to be efficiently removed vertically while maintaining horizontal compactness, resolving the contradiction between compact device volume and effective heat radiation.
Solution Approach 2:
The air guide passage acts as an intermediary structure that facilitates heat removal. It provides a dedicated thermal management pathway that mediates between the heat-generating choke coil and the external environment, enabling effective heat radiation without requiring additional horizontal space.
2Volume of moving object
If power transistors and electronic components are vertically arranged on the circuit board, then the space utilization is improved, but the heat radiation path is blocked
Solution Approach 1:
The patent segments the heat dissipation function from the electrical circuit board by creating a separate air guide passage system. This segmentation allows the circuit board to maintain its vertical component arrangement for space efficiency, while the independent airflow pathway handles heat removal without being blocked by the components.
3Temperature
If the fan unit is added to guide airflow, then the heat radiation efficiency is improved, but the device complexity increases
Solution Approach 1:
The air guide passage structure serves multiple functions: it provides structural support for the choke coil, defines the airflow path, and acts as a heat dissipation channel. This multi-functionality reduces the need for separate components, allowing the fan unit to be added with minimal increase in overall device complexity while significantly improving heat radiation efficiency.
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
The solution effectively prevents heat accumulation under the choke coils, ensuring smooth heat radiation and preventing overheating, thus ensuring the power inverter operates reliably by guiding outside air through the casing to expel generated heat.
Implementation Method 1
Through the fan unit, the outside air is guided into the casing via the air inlets of the casing, and the heat generated by the choke coil is expelled to the outside via the gap, the air guide passage and the air outlets of the casing
Implementation Method 2
The first heat radiating holes, the second heat radiating holes and the heat radiating space are communicated with one another to form an air guide passage
Data Source
AI summary
A choke coil module of a high power density DC-AC power inverter includes a bottom plate and a top plate. Two upright posts are secured between the bottom plate and the top plate. The upright posts are sleeved with choke coils, respectively. The choke coils and heat radiating holes of the bottom plate and the top plate are communicated with one another to form an air guide passage. When the power converter is actuated, the choke coils generate heat. Through a fan unit, the outside air is guided into a casing via air inlets of the casing, and the heat generated by the choke coils is expelled to the outside via the air guide passage and air outlets of the casing. The choke coil module mounted in the high power density casing is able to achieve an excellent heat radiation effect.