Multicavity Scroll Compressor Discharge Layout for Noise Reduction
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Solution Overview
Problem
Electric compressors in electric vehicles face challenges with high noise levels and reduced operating life due to high-speed operation, and they consume battery energy even when the vehicle is not in use, which can degrade the battery.
Innovation Solution
A scroll-type electric compressor design featuring a housing with an inverter module, motor, and a compression device that converts direct current to alternating current, allowing controlled release of refrigerant through multiple outlets to optimize compression cycles and reduce noise, along with an oil separator to manage lubrication and refrigerant separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the electric compressor runs at high speed to provide efficient cooling and heating, then the cooling and heating efficiency is improved, but the noise level increases
Solution Approach 1:
The discharge port is divided into multiple outlets (central discharge port and side discharge ports) to segment the refrigerant flow. This segmentation allows the compressor to achieve high-speed operation for efficient cooling and heating while reducing noise by distributing the discharge flow across multiple paths, preventing concentration of noise at a single outlet.
2Reliability
If the electric compressor operates continuously to maintain cooling and heating, then the system reliability is improved, but the battery operating time is reduced
Solution Approach 1:
The compressor system incorporates dynamic control through the inverter module that can adjust the motor speed based on real-time cooling and heating demands. This dynamic operation allows the system to maintain reliability by operating only when needed at optimized speeds, rather than continuous operation, thereby extending battery operating time while ensuring system reliability.
3Device complexity
If a single discharge port is used, then the device complexity is reduced, but the noise level and compression efficiency are compromised
Solution Approach 1:
The discharge port is segmented into multiple outlets including a central discharge port and side discharge ports. This segmentation reduces noise by distributing refrigerant discharge across multiple paths and improves compression efficiency by optimizing the discharge timing and pressure distribution, while the increase in device complexity is minimal and justified by the performance gains.
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 design enhances efficiency, reduces noise, and extends the operating life of the compressor while minimizing battery degradation by optimizing energy use and refrigerant management.
Implementation Method 1
The inverter module is adapted to convert direct current electrical power to alternating current electrical power
Implementation Method 2
The motor is mounted inside the housing and the compression device is coupled to the motor for receiving the refrigerant from the intake volume and compressing the refrigerant as the motor is rotated
Implementation Method 3
The compression device is configured to compress the refrigerant as the motor is rotated, with the compression device having a central compression device outlet port and first and second side compression device outlet ports
Data Source
AI summary
An electric compressor includes a housing, refrigerant inlet port, a refrigerant outlet port, an inverter section, a motor section, a compression device and a front cover. The housing defines an intake volume and a discharge volume. The refrigerant inlet port is coupled to the housing and is configured to introduce the refrigerant to the intake volume. The compression device is a scroll-type compression device configured to compress the refrigerant. The refrigerant outlet port is coupled to the housing and is configured to allow compressed refrigerant to exit the scroll-type electric compressor from the discharge volume.