Motor Handpiece Cooling Path Integration
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Solution Overview
Problem
Existing motor handpieces for medical and cosmetic applications face issues with complex sealing leading to leaks, limited functional line placement, and inadequate cooling due to irregular cross-sectional cooling paths, resulting in inefficient heat dissipation and potential overheating.
Innovation Solution
The motor handpiece integrates a cooling path within the housing wall as a cavity, allowing for a single-piece assembly with separate fluid and functional paths, featuring meandering cooling sections for enhanced heat dissipation, and uses laser-sintering for complex shapes, enabling efficient sealing and reduced part count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling path is provided adjacent to the receiving space in existing motor handpieces, then heat dissipation is enabled, but the sealing becomes complex and leaks occur after longer operation
Solution Approach 1:
The cooling path is integrated directly into the housing wall as a cavity, merging the cooling function with the housing structure itself. This eliminates the need for separate cooling components and their associated seals, thereby improving sealing reliability while maintaining effective heat dissipation from the motor.
2Temperature
If a cooling path with irregular cross section is used in existing motor handpieces, then cooling is provided, but the cooling effect is insufficient in certain areas due to short-circuit currents
Solution Approach 1:
The cooling path cross-section is designed to be substantially uniform along its length, ensuring consistent cooling performance throughout. This uniform geometry prevents short-circuit currents and inadequate water exchange in specific areas, maintaining efficient heat removal from all regions of the motor.
3Temperature
If a cylindrical housing sleeve is used in existing motor handpieces, then cooling is enabled, but further functional lines can only be laid along the motor on the outside
Solution Approach 1:
The housing wall serves dual purposes: it provides structural support and contains the integrated cooling path cavity. This merging of structural and cooling functions frees up external space on the housing sleeve, allowing functional lines to be arranged more flexibly and reducing device complexity.
4Temperature
If multiple seals are used in existing motor handpieces for the cooling path, then cooling is provided, but assembly becomes complex and leaks occur
Solution Approach 1:
The cooling path is formed as an integrated cavity within the housing wall itself, eliminating the need for separate sealing components. This integration simplifies assembly by reducing the number of parts and sealing interfaces, while maintaining reliable cooling function.
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 design ensures reliable, trouble-free cooling with improved heat dissipation, reduced weight, and simplified assembly, maintaining a comfortable handling temperature even after prolonged use.
Implementation Method 1
The cooling path arranged adjacent to the receiving space enables the dissipation of heat, which is generated in particular when the motor has been in operation for a longer period of time
Data Source
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AI summary
The motor handpiece (4) has a housing (14), in which a receiving space (26) is provided between a terminal end (18) and a working end (22). An electric motor (28) is accommodated in the receiving space for driving a tool (30) attached at the working end. A cooling path (34) for guiding a cooling medium is arranged adjacent to the receiving space. The cooling path is integrated into the housing by forming a material recess in a single-piece housing wall (16). The cooling path has multiple cooling sections around the receiving space.