Compressor Injection Pipe Muffler Design
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Solution Overview
Problem
Compressor systems experience vibrations and stress due to pressure pulsation in the refrigerant circuit, leading to noise and potential equipment reliability issues, particularly with the use of mufflers that increase piping stress.
Innovation Solution
A compressor design incorporating a first throttle portion with a narrower cross-sectional area, an enlarged flow path portion with a larger cross-sectional area, and a second throttle portion, which function together to reduce vibrations and noise by acting as a muffler, with optional configurations including a pressure vessel and separate or combined members for the flow path components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a muffler is attached to the injection pipe to reduce vibrations and noise, then the vibrations and noise are reduced, but the piping receives large stress which may cause reliability problems
Solution Approach 1:
The patent integrates the muffler function directly into the injection pipe structure by forming the first throttle portion, enlarged flow path portion, and second throttle portion as part of the injection pipe itself. This merging eliminates the need for a separate attached muffler, thereby reducing vibrations and noise while avoiding the additional stress that would be imposed on the piping system by an external muffler component.
Solution Approach 2:
The injection pipe is designed to serve multiple functions: it delivers intermediate pressure gas refrigerant to the compression chamber while simultaneously functioning as a muffler to reduce vibrations and noise. The first throttle portion, enlarged flow path portion, and second throttle portion collectively provide both the flow control function and the noise reduction function, making the injection pipe a multi-functional component that eliminates the need for separate noise control devices.
2Object-affected harmful factors
If a separate muffler is attached to the injection pipe, then vibrations are reduced, but the device complexity increases due to additional components and assembly requirements
Solution Approach 1:
The patent combines the muffler functionality with the injection pipe structure, eliminating the need for a separate muffler component. The first throttle portion, enlarged flow path portion, and second throttle portion are integrated into the injection pipe, thereby reducing device complexity while maintaining vibration reduction effectiveness.
Solution Approach 2:
The injection pipe is designed to perform both refrigerant delivery and vibration reduction functions through its integrated throttle portions and enlarged flow path. This multi-functionality reduces the overall number of components required in the system, simplifying the device structure and reducing assembly complexity.
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 effectively reduces vibrations and noise caused by pressure pulsation, enhancing the reliability of the compressor system by stabilizing the refrigerant flow and allowing for easier assembly and modification of the muffler path.
Implementation Method 1
the injection pipe often vibrates under pressure pulsation of the gas refrigerant
Implementation Method 2
the path composed of the first throttle portion, the enlarged flow path portion, and the second throttle portion functions as a muffler and reduces the vibrations of each portion caused by pressure pulsation of the refrigerant
Implementation Method 3
at least a part of the second throttle portion is provided in the pressure vessel. Since a part of the flow of the pulsating refrigerant passes through the pressure vessel, the noise outside the pressure vessel is reduced as a result
Data Source
AI summary
A compressor includes a first throttle portion that receives a refrigerant at an intermediate pressure from an injection pipe of a refrigerant circuit, an enlarged flow path portion that receives the refrigerant from the first throttle portion, a second throttle portion that receives the refrigerant from the enlarged flow path portion, and a compression element. The compression element includes a compression chamber that receives the refrigerant from the second throttle portion. The first throttle portion has a flow path cross-sectional area that is narrower than both a flow path cross-sectional area of the injection pipe and a flow path cross-sectional area of the enlarged flow path portion. The second throttle portion has a flow path cross-sectional area that is narrower than the flow path cross-sectional area of the enlarged flow path portion.