Cleaner Nozzle Motor Layout for PCB Protection and Cooling
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Solution Overview
Problem
Vacuum cleaner nozzles with integrated motors suffer from static electricity damage to printed circuit boards (PCBs) and inadequate heat dissipation, as well as vibration issues due to the motor's housing structure.
Innovation Solution
A nozzle design with a motor supporter that separates the motor from the PCB, creating air flow spaces for static discharge and heat dissipation, and integrating the motor, gear unit, and supporter to reduce vibrations through fastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the motor is housed inside the brush bar (rotating sweeper), then the device structure is compact and integrated, but static electricity generated during cleaning contacts the PCB and damages it
Solution Approach 1:
The motor housing is divided into two separate sections: a brush bar housing containing the rotating sweeper, and a motor housing containing the motor and PCB. This segmentation creates physical separation between the static electricity generation point (brush bar) and the sensitive electronic component (PCB), allowing static discharge paths to be established away from the PCB while maintaining structural integration through coupling mechanisms.
2Device complexity
If the motor is housed inside the brush bar, then the structure is compact, but heat dissipation of the motor is insufficient
Solution Approach 1:
The motor is separated from the brush bar housing and placed in its own motor housing with dedicated heat dissipation features. The motor housing includes protrusions that extend into the motor housing cavity, creating turbulence and improving air circulation around the motor for enhanced cooling, while the brush bar housing maintains its rotating sweeper function independently.
3Device complexity
If the motor is housed inside the brush bar, then the structure is integrated, but vibration generated by the motor is not reduced
Solution Approach 1:
The motor is separated into its own housing unit that can be independently mounted and isolated from the brush bar assembly. This allows the motor housing to be designed with specific vibration damping features and mounting configurations that reduce transmission of motor vibrations to the brush bar and rotating sweeper, improving overall operational stability.
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
Prevents static electricity damage to the motor's PCB by allowing natural discharge and enhances cooling and reduces vibrations, ensuring effective operation of the vacuum cleaner's drive unit.
Implementation Method 1
a first space portion in which air flows is provided between the motor supporter and the PCB installation portion
Implementation Method 2
a printed circuit board (PCB) installation portion in which a PCB is installed and which is spaced apart from the motor supporter is provided in the motor
Data Source
AI summary
A nozzle of a cleaner includes: a housing; a rotation cleaning unit accommodated in the housing and configured to clean a surface based on a rotation operation; and a drive unit inserted into a side of the rotation cleaning unit. The drive unit includes a motor, a motor supporter fixed to the housing and coupled to the motor, a gear unit connected with a rotation shaft of the motor to transfer a driving force, and a shaft connected to the gear unit and the rotation cleaning unit to transfer a rotation force to the rotation cleaning unit. The motor includes a printed circuit board (PCB) installation portion in which a PCB is installed and which is spaced apart from the motor supporter, in which a first space portion in which the air flows is formed between the motor supporter and the PCB installation portion.