Dryer PCB Heat Dissipation Duct for Drum Heat Protection
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Solution Overview
Problem
Clothes dryers face challenges in effectively dissipating heat from electronic components, particularly the printed circuit board, and protecting these components from high temperatures generated by the drum, which can lead to overheating and potential damage.
Innovation Solution
A heat dissipation duct is integrated into the clothes dryer design, featuring a lower and upper case with a cooling fan, airflow guide portions, and heat sinks, allowing for efficient heat dissipation and easy repair or replacement of the printed circuit board, while minimizing the impact of drum heat on electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If electronic components are mounted on a printed circuit board in the clothes dryer, then the control function is improved, but heat generated from the electronic components causes overheating and potential damage
Solution Approach 1:
The printed circuit board is divided into a first PCB and a second PCB, with the first PCB housing the heat-generating electronic components and the second PCB providing a heat dissipation surface. This segmentation separates the heat source from the heat-sensitive areas, allowing effective heat management while maintaining full control functionality.
Solution Approach 2:
A heat dissipation structure is introduced as an intermediary between the heat-generating electronic components and the surrounding environment. This structure includes a heat dissipation passage and heat dissipation fins that facilitate heat transfer to the external air, preventing overheating of the control system.
2Device complexity
If the printed circuit board is integrated into the cabinet structure, then the device complexity is reduced, but the printed circuit board cannot be easily repaired or replaced
Solution Approach 1:
The control system is segmented into a modular assembly consisting of the printed circuit board housed within a dedicated control housing. This housing can be easily detached from the main cabinet, allowing the entire control assembly or individual circuit boards to be quickly removed for repair or replacement without disassembling the entire dryer structure.
Solution Approach 2:
The control housing is designed with dynamic accessibility, featuring removable panels or snap-fit connections that allow easy access to the printed circuit board. This dynamic design enables maintenance personnel to quickly reach and replace circuit boards without permanent structural modifications to the cabinet.
3Device complexity
If the printed circuit board is exposed to the drum heat, then the device structure is simplified, but the electronic components are damaged by high temperature from the drum
Solution Approach 1:
A thermal barrier or heat shield is positioned between the drum and the printed circuit board to block direct heat transfer. This intermediary structure reflects or absorbs the radiant heat from the drum, protecting the electronic components while maintaining the overall structural simplicity of the dryer.
Solution Approach 2:
The printed circuit board is positioned in a three-dimensional space that is spatially separated from the drum's heat zone. By utilizing vertical or lateral spacing within the cabinet, the design creates a thermal gradient that protects sensitive electronics from the high-temperature environment near the drum while maintaining structural 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 dissipates heat from the printed circuit board, protects electronic components from high temperatures, and facilitates easy maintenance by allowing the heat dissipation duct to be easily separated for repair or replacement, enhancing the overall reliability and efficiency of the dryer.
Implementation Method 1
a cooling fan coupled to the upper case to form an airflow in the heat dissipation passage
Implementation Method 2
the printed circuit board may include a driving device controller configured to control the driving device and a compressor controller configured to control the compressor
Data Source
AI summary
A clothes dryer with improved heat dissipation efficiency of electronic components. The clothes dryer includes a cabinet having a clothes inlet, a drum rotatably provided in the cabinet, a drying fan configured to circulate air for drying supplied to the drum, and a heat dissipation duct. Wherein the heat dissipation plate includes a lower case fixed to the cabinet and provided with an airflow guide portion protruding toward the printed circuit board and an upper case coupled to an upper portion of the lower case and to which a printed circuit board on which a plurality of electronic components is mounted is fixed.