Air Blower Grip Conduction and Airflow Cooling for PCB Protection
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Solution Overview
Problem
Air blowers used in outdoor cleaning face issues of electrostatic discharge and heat generation due to high-speed operation, which can damage internal circuits.
Innovation Solution
The air blower design includes a conductive structure connected to the circuit board with one end exposed outward from the grip area to dissipate static charge, an air guiding opening to dissipate heat, and a display assembly to monitor operation duration, along with features like ergonomic grips and heat-dissipating airflow channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the air blower operates at high speed to enhance cleaning performance, then the airflow power is improved, but electrostatic accumulation increases leading to electrostatic discharge that may damage internal circuits
Solution Approach 1:
A conductive structure is introduced as an intermediary element between the electrostatic charge accumulation point and the circuit board. This conductive structure provides a controlled discharge path that safely dissipates electrostatic charges before they can reach and damage the circuit board, thus protecting the internal circuits while allowing high-speed operation to continue
Solution Approach 2:
The harmful electrostatic discharge is converted into a beneficial protective mechanism by designing a conductive structure that intentionally provides a safe discharge path. The electrostatic energy that would otherwise damage the circuit board is instead directed through the conductive structure to a safe outlet, transforming a harmful effect into a controlled protective function
2Productivity
If the air blower operates at high speed to enhance cleaning performance, then the airflow power is improved, but heat generation increases that may cause damage to internal circuitry
Solution Approach 1:
The airflow generated by the high-speed impeller is utilized as a cooling medium. The air flow passes through channels that are positioned to cool the circuit board and motor, using the pneumatic flow to dissipate heat from internal components, thus preventing overheating damage while maintaining high-speed operation
Solution Approach 2:
The system uses its own generated airflow to cool its internal components. The impeller generates airflow for cleaning purposes, and this same airflow is directed through heat-dissipating channels to cool the motor and circuit board, allowing the system to self-regulate its temperature without requiring external cooling systems
3Reliability
If a conductive structure is added to dissipate static charge, then electrostatic discharge protection is improved, but device complexity increases
Solution Approach 1:
The conductive structure is designed to serve multiple functions: it provides electrostatic discharge protection, maintains structural integrity of the housing, and does not interfere with the airflow generation or component mounting. By making the conductive structure multi-functional, the patent avoids adding unnecessary complexity while achieving reliable ESD protection
Solution Approach 2:
The conductive structure is strategically positioned only where electrostatic discharge protection is needed, rather than making the entire housing conductive. This localized approach to conductivity provides necessary protection while minimizing the overall complexity and material requirements of the device
4Temperature
If heat dissipation channels are implemented, then heat dissipation capability is improved, but device complexity increases
Solution Approach 1:
The heat dissipation channels are merged with the existing housing structure and airflow channels of the air blower. Rather than adding separate cooling components, the patent integrates thermal management functions into the structural elements already present in the device, thus improving heat dissipation without significantly increasing overall complexity
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 design effectively prevents electrostatic discharge and heat-related damage, enhances user comfort, and improves operational safety and efficiency by managing static charge and heat dissipation.
Implementation Method 1
a conductive structure, one end of the conductive structure is configured to be connected to the circuit board, and another end of the conductive structure is configured to be exposed outward from the grip area
Implementation Method 2
an air guiding opening provided at the connection between the upper housing and the handle; the air guiding opening is configured to interconnect an inner cavity of the upper housing and the inner cavity of the handle; the air guiding opening is configured to guide part of the airflow from the upper housing into the inner cavity of the handle
Data Source
AI summary
The present disclosure provides an air blower which comprises a housing provided with grip area; a motor disposed within the housing; an impeller disposed within the housing; a circuit board disposed within the housing; the circuit board is configured to be connected to the motor, and a conductive structure, one end of the conductive structure is configured to be connected to the circuit board, and another end of the conductive structure is configured to be exposed outward from the grip area.