Driving unit and linear compressor including the same
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Solution Overview
Problem
The challenge lies in reducing the size and height of the driving unit in linear compressors while maintaining stable output and minimizing interference between components, particularly the oil feeder and stator cores, to meet the demands of subminiature linear compressors.
Innovation Solution
The driving unit is designed with a bobbin cross-section featuring straight and curved portions, where stator cores are only placed on the curved portions, and permanent magnets are positioned to face these areas, reducing overall size and height while maintaining output stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of the linear motor is reduced, then the overall size of the linear compressor is reduced, but the output of the linear motor is reduced
Solution Approach 1:
The patent positions stator cores only on the curved portions of the bobbin cross-section, utilizing the radial dimension more effectively. This dimensional optimization allows the driving unit to maintain sufficient magnetic interaction area and output performance while reducing the axial height and overall volume of the linear compressor.
2Volume of moving object
If the distance between stator cores is reduced, then the size of the driving unit is reduced, but interference with other components occurs
Solution Approach 1:
The patent segments the bobbin cross-section into straight portions and curved portions, placing stator cores only on the curved portions. This segmentation creates natural spacing zones along the straight portions where other components like the oil feeder can be positioned without interference, allowing compact design while avoiding component conflicts.
3Power
If stator cores are placed on all portions of the bobbin, then the output is maximized, but the height and complexity of the driving unit increases
Solution Approach 1:
The patent applies local quality by concentrating stator cores only on the curved portions of the bobbin cross-section rather than distributing them uniformly. This localized arrangement maintains sufficient magnetic flux density and driving output in the critical regions while reducing the overall height and complexity of the driving unit structure.
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 reduces the size and height of the linear compressor, minimizes interference between components, and improves manufacturing efficiency by determining the positions of permanent magnets and stator cores through magnet and supporter coupling holes.
Implementation Method 1
a coil wound on the bobbin
Implementation Method 2
determining the positions of permanent magnets and stator cores through magnet and supporter coupling holes
Data Source
AI summary
A driving unit and a linear compressor including the same are provided. The driving unit includes an inner stator, a bobbin surrounding the inner stator in a circumferential direction, a coil wound on the bobbin, a plurality of stator cores surrounding the bobbin and spaced apart from each other in the circumferential direction, and a plurality of permanent magnets disposed between the inner stator and the plurality of stator cores. A cross section of the bobbin may include a pair of straight portions facing each other and a curved portion connecting the pair of straight portions.