Magnetic Debris Filtration in Rolling Piston Compressors
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Solution Overview
Problem
Electric compressors in battery-powered vehicles face challenges in achieving high efficiency, low noise, and extended operating life, particularly when driven by a battery rather than an engine, and require effective debris management to maintain performance.
Innovation Solution
The compressor incorporates a magnetic debris filter and a rolling piston design with integrated discharge chambers, along with an oil separator mechanism to enhance efficiency and reduce noise and vibration, while the magnetic debris filter collects debris and the rolling piston design balances the compressor for reduced noise and increased efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetic debris filter is added to the compressor, then debris management and operating life are improved, but device complexity increases
Solution Approach 1:
A magnetic debris filter is introduced as an intermediary component in the refrigerant flow path. The filter includes a magnetic element that attracts and collects ferrous debris particles from the refrigerant, preventing them from reaching and damaging compressor components. This mediator approach maintains reliability improvement while isolating the complexity to a specific removable component rather than redesigning the entire compressor system.
2Temperature
If the compressor is run frequently to cool the battery, then battery temperature is controlled, but battery operating time is reduced due to increased energy consumption
Solution Approach 1:
The compressor is designed to perform preliminary cooling action on the battery during periods when the vehicle is operating and the alternator is generating excess electrical energy. By storing thermal energy in the refrigerant system during these periods, the system reduces the need for frequent compressor operation during charging, thereby controlling battery temperature while minimizing impact on battery operating time.
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 provides a high-efficiency, low-noise operation with extended compressor life by effectively managing debris and optimizing the compression process, thereby reducing battery drain and maintaining system performance.
Implementation Method 1
The magnetic element has magnetic properties, is configured to collect debris from the electric compressor
Data Source
AI summary
An electric compressor includes a housing and a compression device. The housing defines an intake volume and a discharge volume. The compression device is a rotary-type compression device configured to compress refrigerant. The compression device includes a piston device including a cylinder and a rolling piston. The cylinder is eccentrically coupled to a drive shaft. The rolling piston has an outer surface in contact with an inner surface of a compression chamber. The rolling piston rotates about the cylinder as the drive shaft and the piston device are rotated by a motor. A vane moveably coupled to the housing and having an end adjacent the compression chamber is biased such that the end of the vane is in contact with the rolling piston as the piston device is rotated by the drive shaft.