Hair Dryer Motor Assembly With Integrated Vortex Suppression
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Solution Overview
Problem
Existing motor assemblies in handheld devices, such as hair dryers, experience increased lateral displacement of the rotor, leading to vortex generation, flow loss, and noise due to the presence of bearings on one side, which shortens the lifespan of the bearings and requires additional components for vortex suppression.
Innovation Solution
The motor assembly includes bearings on both sides of the rotor with vortex suppression parts blocking the empty spaces between the bracket's bridges, reducing vortex generation and flow loss, and integrating the vortex suppression parts with the stator's insulator to prevent additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bearings are installed on both sides of the rotor to reduce lateral displacement, then reliability is improved, but device complexity increases due to the need for a separate bracket with multiple bridges
Solution Approach 1:
The vortex suppression part is integrated with the stator's insulator structure, merging two functional elements (vortex suppression and electrical insulation) into a single component. This eliminates the need for a separate vortex suppression structure while maintaining the bracket's bearing support function, thereby reducing device complexity without compromising bearing reliability
Solution Approach 2:
The stator insulator is given multiple functions: it provides electrical insulation for the stator coil and simultaneously serves as a vortex suppression structure by blocking empty spaces between bracket bridges. This multi-functionality reduces the overall number of components needed in the motor assembly
2Reliability
If the bracket includes multiple bridges to support the bearing, then reliability is improved, but object-generated harmful factors worsen due to vortex generation between bridges
Solution Approach 1:
The design accepts the presence of multiple bridges for bearing support but converts the harmful vortex generation into a beneficial outcome by integrating vortex suppression parts that use the same structural elements (insulator extensions) to block vortices. The bridges remain for structural support while the insulator extensions suppress the vortices they would otherwise generate
Solution Approach 2:
The vortex suppression parts act as intermediary elements between the bracket bridges and the air flow. These parts (formed by insulator extensions) block the empty spaces between bridges, mediating the interaction between air flow and bracket structure to prevent vortex formation while maintaining bearing support functionality
3Object-generated harmful factors
If vortex suppression parts are added as separate components, then object-generated harmful factors are reduced, but device complexity increases
Solution Approach 1:
The vortex suppression function is merged with the stator insulator structure. The insulator is extended to form vortex suppression parts that block empty spaces between bracket bridges, eliminating the need for separate vortex suppression components while maintaining the ability to suppress vortices and reduce harmful air flow patterns
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 suppresses vortex generation, reduces flow loss and noise, and promotes cooling while maintaining a compact design by integrating vortex suppression with the stator's insulator, thus enhancing the motor's efficiency and longevity.
Implementation Method 1
vortex suppression parts each configured to suppress a vortex generation by blocking an empty space of a bracket that supports a half-load-side bearing
Implementation Method 2
bearings disposed on both sides of a rotor in an axial direction
Implementation Method 3
an impeller and an inner housing may be disposed inside an outer housing, a stator and a rotor may be disposed inside the inner housing
Data Source
AI summary
The present invention relates to a motor assembly and a hair dryer having same. The motor assembly of the present invention comprises: an impeller; an outer housing and an inner housing arranged concentrically; a stator accommodated inside the inner housing; a rotor disposed inside the stator; a bearing supporting a rotary shaft of the rotor; a bracket having a bearing accommodating part in which the bearing is accommodated, and a plurality of bridges which are spaced apart from the outer surface of the bearing accommodating part in a circumferential direction thereof and protrude in an axial direction thereof so as to be coupled to the inner housing; and a vortex suppressing part blocking empty spaces between the plurality of bridges so that generation of air vortices can be suppressed. Thereby, it is possible to suppress vortex generation in a downstream region of the impeller, and flow loss caused by the vortex generation can be reduced.