Compressor Discharge Cover With Coupling Space For Noise Reduction
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Solution Overview
Problem
Existing compressors generate significant noise and vibration during the discharge of refrigerant due to insufficient acoustic equivalent mass in the discharge muffler, leading to reduced efficiency and increased flow resistance, and the use of connecting pipes complicates manufacturing and reduces reliability.
Innovation Solution
A compressor design that incorporates a coupling space between a first and second plenum within the discharge cover, where refrigerant moves through a narrow and long movement channel, increasing acoustic equivalent mass and reducing noise, while eliminating the need for connecting pipes to prevent thermal energy transfer and maintain efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the cross-sectional area of the outlet hole is reduced to increase acoustic equivalent mass, then pulsation reduction is improved, but flow resistance is rapidly increased
Solution Approach 1:
The patent transitions from a single outlet hole configuration to a multi-outlet hole configuration, distributing the acoustic mass effect across multiple dimensions. By providing multiple outlet holes with smaller individual cross-sectional areas, the system achieves sufficient acoustic equivalent mass for pulsation reduction while maintaining lower flow resistance compared to a single large outlet hole of equivalent total area.
2Ease of manufacture
If a separate pipe is directly attached for discharge spaces to communicate with each other, then manufacturing complexity increases, but reliability of connected portion becomes difficult to secure
Solution Approach 1:
The patent merges the communication function between discharge spaces directly into the discharge muffler structure by providing multiple outlet holes formed through the partition walls. This eliminates the need for separate connecting pipes and external attachments, integrating the communication function within the existing component structure. The result is both easier manufacturing and higher reliability, as the outlet holes are formed as integral parts of the partition walls rather than requiring separate connections.
3Volume of stationary object
If the pipe for communication between discharge spaces is installed via outside the discharge cover, then installation space requirement is satisfied, but thermal energy transfer occurs reducing compression efficiency
Solution Approach 1:
The patent extracts the communication function from external piping and relocates it directly into the discharge cover structure through multiple outlet holes formed through partition walls. This eliminates the need for external pipes that would expose refrigerant to thermal energy transfer. The communication between discharge spaces is achieved through the internal structure of the discharge cover itself, maintaining thermal isolation while satisfying space requirements.
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 pulsation and noise generation during refrigerant discharge, maintains flow resistance, and enhances compression efficiency by preventing thermal energy transfer, thus improving the overall performance of the compressor.
Implementation Method 1
since the outlet hole is formed through the partition wall having a relatively thin thickness, a sufficient acoustic equivalent mass is not secured, which is disadvantageous to reduce the pulsation due to the discharge of the refrigerant
Implementation Method 2
a coupling space, which is defined in a circumferential direction such that one end portion of the second plenum can be inserted into the first plenum in the axial direction
Data Source
AI summary
The present disclosure relates to a compressor including a case, a compression unit provided inside the case, and a driving unit, wherein the compression unit includes a cylinder having a compression space, a piston reciprocating inside the cylinder, a discharge cover covering the compression space, a first plenum disposed inside the discharge cover and having a discharge space and a coupling space, a second plenum disposed inside the discharge cover and defining a movement channel through which refrigerant moves, a rib disposed in the movement channel, and a communicating portion through which the discharge space and the movement channel communicate with each other, wherein the refrigerant discharged from the compression space moves along the discharge space, the communicating portion, and the movement channel, whereby pulsation caused by the discharge of the refrigerant can be reduced.