Vacuum Cleaner Motor Housing Layout for PCB Cooling
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Solution Overview
Problem
The existing heat radiation structure for circuit boards in vacuum cleaners is inefficient, leading to degraded cooling performance and increased size due to the distance between the circuit board and motor housing, necessitating additional components and potentially larger vacuum cleaner volumes.
Innovation Solution
The vacuum cleaner incorporates a motor housing with a chamber accommodating the suction motor, a heat radiating member such as a heat sink in direct contact with the inverter, and a circuit board with heating components, along with a motor frame that supports the suction motor assembly and separates the charger and inverter units to minimize heat interaction and optimize airflow for cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the circuit board is cooled by air flowing in an air flow tube, then the cooling performance is improved, but the device complexity increases due to the additional air flow tube structure
Solution Approach 1:
The patent merges the air flow tube function into the motor housing structure itself. The motor housing includes a chamber that accommodates the suction motor and integrates the air flow path, eliminating the need for a separate air flow tube. The circuit board is positioned to be cooled by air flowing through this integrated chamber, combining structural support and cooling functions in one component.
2Temperature
If the circuit board is cooled by air flowing in an air flow tube, then the cooling performance is improved, but the volume of the vacuum cleaner increases
Solution Approach 1:
The motor housing chamber serves dual purposes: accommodating the suction motor and providing the air flow path for cooling the circuit board. This integration eliminates the need for additional space that would be required for a separate air flow tube, thereby reducing the overall volume of the vacuum cleaner while maintaining effective cooling.
3Temperature
If the distance between the circuit board and motor housing is increased, then the heat radiation performance is improved, but the volume of the vacuum cleaner increases
Solution Approach 1:
The patent converts the harmful heat generated by the suction motor into a beneficial cooling resource for the circuit board. The motor housing chamber directs the air flow from the motor area past the circuit board, allowing the motor's heat generation to drive the convection current that cools the circuit board. This eliminates the need for increased distance or additional cooling structures.
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 effectively cools the circuit board, reduces noise from the suction motor, and allows for a more compact design by integrating efficient heat management and airflow, enabling smoother operation and movement without the constraint of a power cord.
Implementation Method 1
a heat radiating member such as a heat sink in direct contact with the inverter
Implementation Method 2
the circuit board is cooled by the air flowing in the air flow tube
Implementation Method 3
a motor housing with a chamber accommodating the suction motor
Data Source
AI summary
A vacuum cleaner is provided. The vacuum cleaner may include a cleaner body having a suction head that communicates with the cleaner body and a suction motor assembly to generate a suction force. The suction motor assembly may include a motor, a motor housing having a chamber to accommodate the motor, a housing cover configured to cover the motor housing and provided with an air inlet, a circuit board provided at an outside of the motor chamber and having at least one heat generating component installed thereupon, and a heat sink provided at the chamber and in contact with the at least one heat generating component. An installation part to install the circuit board may be provided at the motor housing.