Compressor Muffler with Divided Exit Flow Path for Suction Reed Timing
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Solution Overview
Problem
Existing compressor mufflers face challenges with valve delay and inconsistent opening amounts due to refrigerant flow, valve rigidity, and varying natural frequencies, leading to inefficiencies in refrigerant suction and discharge processes.
Innovation Solution
A muffler design with a body portion, base portion, and variable flow path that includes a barrier to divide the exit flow path into multiple paths, a suction valve assembly with reeds of varying rigidities and frequencies, and a flap mechanism to control flow paths based on compressor RPM, ensuring consistent fluid flow and reducing opening delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single exit flow path is used in the muffler, then the structure is simple, but the fluid flow consistency deteriorates due to varying natural frequencies of suction reeds
Solution Approach 1:
The exit flow path is divided into multiple separate paths (first exit flow path and second exit flow path) using barriers. Each path is associated with suction reeds of different natural frequencies, allowing independent flow control for each reed type. This segmentation resolves the contradiction by maintaining simple individual paths while achieving overall flow consistency through dedicated pathways for different frequency reeds.
2Ease of operation
If suction reeds of different rigidities are used, then the opening amounts are improved, but opening delays occur due to varying natural frequencies
Solution Approach 1:
A variable flow path portion is introduced that can dynamically switch between different flow paths based on operating conditions (RPM). The variable flow path portion includes opening/closing units that redirect fluid flow to appropriate exit flow paths depending on the operating regime, thereby coordinating the opening timing of suction reeds with different natural frequencies and eliminating opening delays.
3Adaptability or versatility
If the muffler operates across varying RPM ranges, then the adaptability is improved, but opening delays occur due to fixed flow path limitations
Solution Approach 1:
The muffler incorporates a variable flow path portion with opening/closing units that dynamically adjust the active flow paths based on RPM conditions. At different RPM ranges, different exit flow paths are activated to match the natural frequencies of suction reeds operating at those speeds, thereby maintaining optimal performance across the full RPM range without opening delays.
Solution Approach 2:
The system changes operational parameters by switching between different flow path configurations based on RPM. The variable flow path portion modifies the effective flow path geometry and resistance characteristics to match the operating conditions, allowing the muffler to adapt to varying RPM ranges while preventing opening delays through parameter optimization.
Data Source
AI summary
A muffler that is mountable on a compressor, the muffler including a body portion including an inlet to which a fluid is introducible; and a base portion connected to the body portion, the base portion including an exit flow path, an outlet at an end of the exit flow path, and a barrier extending from the outlet through the exit flow path so as to divide an exit hole of the outlet and the exit flow path, wherein the fluid introduced to the body portion flows through the base portion via the exit flow path and is discharged through the exit hole of the outlet.