Clothes Treatment Fan Assembly With Internal Rotor Motor Cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Air passage assemblies for clothes treatment devices have limited space, leading to poor heat dissipation in motors, which prevents the use of internal rotor motors and results in high costs and complex fabrication processes.
Innovation Solution
A fan assembly with an internal rotor motor that extends towards the upper cover and inner wall of the air passage housing, increasing its size in the up-down direction to enhance heat dissipation, while maintaining sufficient space to avoid interference with other components, thereby simplifying production and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-phase asynchronous external rotor motor is used in the air passage assembly, then the motor can be timely heat dissipated and operate normally, but the fabrication process becomes complicated and costs increase
Solution Approach 1:
The patent inverts the conventional motor type selection by choosing an internal rotor motor instead of the traditional external rotor motor. This inversion allows the motor to extend in the up-down direction where space is available, increasing heat dissipation area while simplifying the fabrication process and reducing costs.
Solution Approach 2:
The patent changes the spatial dimension of heat dissipation by extending the motor in the up-down direction (vertical dimension) rather than relying solely on radial heat dissipation. This dimensional change increases the heat dissipation area without compromising motor reliability.
2Ease of manufacture
If an internal rotor motor is used to reduce costs and simplify production, then fabrication costs decrease and production process simplifies, but heat dissipation effect deteriorates due to limited installation space
Solution Approach 1:
The patent utilizes the available vertical space in the air passage housing to extend the motor in the up-down direction. This dimensional approach increases the heat dissipation area from the motor surface that contacts the air passage housing, effectively solving the heat dissipation problem while maintaining the cost and production advantages of internal rotor motors.
Solution Approach 2:
The patent enhances heat dissipation at specific locations by increasing the motor's contact area with the air passage housing in the vertical direction. This localized quality improvement focuses heat dissipation where space is available, without requiring changes to the overall motor design or increasing costs.
3Temperature
If the motor size is increased in the up-down direction to improve heat dissipation, then heat dissipation efficiency improves, but interference with other components may occur
Solution Approach 1:
The patent optimizes the motor extension dimensions by setting specific parameter ranges: h1≥5mm (distance from motor upper end to upper cover) and h2≥0.5mm (distance from motor lower end to inner wall). These parameter changes ensure sufficient heat dissipation area while preventing interference with other components, achieving a balance between heat dissipation efficiency and component adaptability.
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 significantly improves heat dissipation efficiency, reduces costs, and simplifies the production process while ensuring the fan assembly's normal operation and power output.
Implementation Method 1
the motor extends towards an upper cover of the clothes treatment device and/or an inner wall of the air passage housing; a distance between an upper end of the motor and the upper cover of the clothes treatment device is h1, and the h1 is greater than or equal to 5 mm; and a distance between a lower end of the motor and the inner wall of the air passage housing in a vertical direction is h2, and the h2 is greater than or equal to 0.5 mm
Data Source
AI summary
A fan assembly for a clothes treatment device and a clothes treatment device. The fan assembly includes an air passage housing defining an installation cavity; an impeller rotatably provided in the installation cavity; and a motor provided in the air passage housing and including a stator and a rotor. The stator is fitted over an outside of the rotor, and the rotor is configured to drive the impeller to rotate. The motor extend towards an upper cover of the clothes treatment device and/or an inner wall of the air passage housing. A distance between an upper end of the motor and the upper cover is h1, and the h1 is greater than or equal to 5 mm. A distance between a lower end of the motor and the inner wall of the air passage housing in a vertical direction is h2, and the h2 is greater than or equal to 0.5 mm.