Scroll Compressor Check Valve Noise Reduction
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Solution Overview
Problem
Existing scroll compressors face challenges in preventing reverse refrigerant flow and reducing flow noise, especially when stopped, due to the need for precise installation of check valves and inefficient refrigerant distribution.
Innovation Solution
The implementation of a scroll compressor design with first and second check valves that move vertically along guides to control discharge and opening ports, utilizing a steel plate with a thickness of 1 mm or less, and a valve seat member attached by projection welding, along with a ring-shaped wave spring for sealing, to prevent reverse flow and noise, while ensuring efficient refrigerant distribution to the compression chamber and drive unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a check valve is installed to prevent reverse flow, then refrigerant reverse flow is prevented, but flow noise increases during stoppage
Solution Approach 1:
A noise reduction chamber is introduced as an intermediary space between the check valve and the discharge port. When the compressor stops, refrigerant flowing back through the check valve enters this chamber instead of directly exiting, where the noise is reduced before discharge. This mediator chamber resolves the contradiction by maintaining reverse flow prevention while eliminating the harmful noise effect.
2Reliability
If refrigerant is distributed to multiple paths, then cooling coverage is improved, but temperature rise during transfer increases
Solution Approach 1:
The refrigerant distribution paths are designed with pre-cooled surfaces and optimized flow channels that maintain low temperature throughout the transfer process. The paths are preliminarily prepared with cooling capacity before refrigerant arrives, preventing temperature rise even as cooling coverage is expanded to multiple areas.
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 effectively prevents reverse refrigerant flow and reduces noise during stoppage, enhances volume efficiency, and improves the performance of the scroll compressor by ensuring direct refrigerant transfer to the compression chamber, thereby improving overall performance and reducing temperature rise.
Implementation Method 1
A ring-shaped wave spring may be disposed on the sealing member to move the sealing member which is moved upward downward to seal the gap.
Implementation Method 2
A valve seat member for mounting the second check valve may be attached to the partition plate and the valve seat member may be attached to the partition plate by a projection welding.
Data Source
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AI summary
Disclosed is a scroll compressor capable of preventing reverse flow of refrigerant and reducing flow noise. The scroll compressor efficiently distribute refrigerant suctioned into the scroll compressor to a compression chamber and a drive unit. The scroll compressor includes a main body, a fixed scroll fixedly installed in the main body, an orbiting scroll configured to engage with the fixed scroll and perform a relative orbiting motion, and to form a compression chamber with the fixed scroll, a partition plate disposed above the fixed scroll to separate an inside of the main body into a low-pressure portion and a high-pressure portion, a first check valve installed at a discharge port of the fixed scroll to open and close the discharge port, and a second check valve installed on the partition plate to open and close an opening allowing communication between the low-pressure portion and the high-pressure portion.