Scroll Compressor Helmholtz Resonance Chamber Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Scroll compressors experience noise and vibration issues due to discharge pulsation and mechanical moving parts, which are not effectively reduced by existing technologies, especially when rotation speed is changed.
Innovation Solution
A scroll compressor design featuring a Helmholtz type resonance chamber formed by a first cover with a first top plate and a second cover, where multiple through holes of different diameters connect the first and second spaces, allowing the gas inside the second space to act as a spring and resonate with sound frequencies, reducing noise and vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a conventional scroll compressor structure is used, then the compressor can compress refrigerant, but noise and vibration occur due to discharge pulsation
Solution Approach 1:
The patent applies Helmholtz resonance chambers to convert the harmful discharge pulsation into beneficial acoustic resonance. The resonance chambers are tuned to resonate at frequencies that counteract the discharge pulsation, transforming the harmful pressure fluctuations into constructive interference patterns that reduce noise and vibration while maintaining compression functionality
Solution Approach 2:
The patent introduces Helmholtz resonance chambers as intermediary elements between the discharge port and the surrounding environment. These chambers act as acoustic mediators that absorb and dampen the discharge pulsation before it propagates outward, reducing noise and vibration without interfering with the primary compression function
2Adaptability or versatility
If the rotation speed of the compressor is changed to adapt to different conditions, then the compressor becomes more versatile, but noise and vibration are not effectively reduced
Solution Approach 1:
The patent implements preliminary anti-action by pre-tuning the Helmholtz resonance chambers to resonate at frequencies that counteract the expected discharge pulsation across different operating conditions. The resonance chambers are designed with specific dimensions and configurations that create opposing acoustic pressures before the harmful vibrations can propagate, effectively reducing noise and vibration regardless of rotation speed changes
3Object-generated harmful factors
If multiple components are added to reduce noise and vibration, then noise and vibration are reduced, but the device becomes more complex
Solution Approach 1:
The patent merges the noise reduction function with the existing compressor structure by integrating Helmholtz resonance chambers into the housing or mounting structure. This combination allows the same structural elements to serve dual purposes: providing mechanical support and reducing noise/vibration through acoustic resonance, thereby avoiding additional standalone components
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 configuration effectively minimizes noise and vibration caused by discharge pulsation and mechanical moving parts with a simple design, utilizing the resonance chamber to dissipate sound and vibration energy.
Implementation Method 1
the configuration surrounded by the first cover and the second cover forms a Helmholtz type resonance chamber communicating with the first space. In the configuration surrounded by the first cover and the second cover, which is the Helmholtz type resonance chamber, the gas inside the second space acts as a spring, and the gas inside the through holes vibrates rigidly to resonate with sounds of specific frequencies.
Implementation Method 2
the gas inside the through holes vibrates rigidly to resonate with sounds of specific frequencies. By generating frictional energy between the gas vibrating inside the through holes and inner walls of the through holes, the sound energy caused by discharge pulsation and the vibration energy caused by mechanical moving parts are reduced.
Implementation Method 3
By generating frictional energy between the gas vibrating inside the through holes and inner walls of the through holes, the sound energy caused by discharge pulsation and the vibration energy caused by mechanical moving parts are reduced.
Data Source
AI summary
The present invention discloses a scroll compressor comprising: a first cover fixed on a fixed scroll; and a second cover fixed on the first cover. The first cover includes a first top plate and a first peripheral wall, which forms a first space inside. The second cover includes a second top plate and a second peripheral wall, which forms a second space inside. The first space connects to a discharge port that penetrates the fixed scroll. Multiple through holes are formed to penetrate the first top plate so that the through holes with different diameters connect the first space and the second space.