Refrigerant Compressor Pulsation Damper Element
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Solution Overview
Problem
Refrigerant compressors, particularly reciprocating compressors, experience pulsations that lead to noise pollution and mechanical stress in the pipe system due to pressure peaks, which existing technologies have not adequately addressed.
Innovation Solution
A pulsation damper element is inserted into the outlet passage of the compressor housing, featuring an inlet screen and an outlet screen with reflection spaces and passages that face each other, designed to suppress pulsations by canceling out standing waves at higher harmonics of the fundamental frequency, thereby decoupling the outlet chamber from the pipeline system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pulsation damper element with a large independent damper chamber is used, then pulsation damping effect is improved, but device volume and space requirements worsen
Solution Approach 1:
The patent merges the damper element with the existing outlet chamber structure. The outlet chamber serves dual purposes: as the compression chamber and as the damper chamber. The damper element is inserted into the outlet passage and utilizes the outlet chamber volume for damping, eliminating the need for a separate large-volume damper chamber while maintaining effective pulsation suppression.
Solution Approach 2:
The damper element is nested within the outlet passage structure. The inlet screen and outlet screen with their passages are positioned within the existing outlet chamber and passage geometry, effectively using the available space without requiring additional external volume.
2Reliability
If the damper element is designed to suppress standing waves at fundamental frequency, then damping effectiveness is improved, but device complexity and volume increase
Solution Approach 1:
The patent changes the target frequency parameter from fundamental frequency to higher harmonics. The damper element is specifically designed to suppress standing waves at higher harmonics of the fundamental frequency, which is where pulsations primarily occur in the pipeline system. This parameter change allows for a more compact and simpler design while maintaining damping effectiveness.
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 solution effectively dampens pulsations, reducing noise and mechanical stress by optimizing the damping effect without requiring a large independent damper chamber, allowing for a compact design that efficiently suppresses pulsations at higher harmonics where they primarily occur, thus minimizing the need for a large volume damper element.
Implementation Method 1
at least one reflection space is provided between the inlet screen and the outlet screen, and that the inlet screen and the outlet screen each have at least one passage that faces a reflection surface on the respective other screen
Implementation Method 2
the damper element to be designed in such a way that standing waves which are extinguished are formed in it at a higher harmonic of a fundamental frequency of the refrigerant compressor
Implementation Method 3
A pulsation damper element is inserted into the outlet passage of the compressor housing... designed to suppress pulsations by canceling out standing waves at higher harmonics
Data Source
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AI summary
To improve a refrigerant compressor, in particular a positive displacement compressor, comprising a compressor housing with an enclosed outlet chamber and an outlet passage leading from the outlet chamber to an external high-pressure connection, in such a way that pulsations are dampened as much as possible, it is proposed that a pulsation damping element be inserted into the outlet passage of the compressor housing downstream of the outlet chamber, that the pulsation damping element have an inlet orifice facing the outlet chamber and extending over a cross-section of the outlet passage, and an outlet orifice opposite this, extending over the cross-section of the outlet passage, that at least one reflection space is provided between the inlet orifice and the outlet orifice, and that the inlet orifice and the outlet orifice each have at least one passage.which faces a reflective surface on the other aperture.