Sealed Compressor Suction Muffler Oil Bubble Noise Reduction
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Solution Overview
Problem
In sealed compressors, bubbles of lubricating oil are suctioned into the compression chamber during start-up, causing noise due to the low position of the suction port relative to the oil level, leading to compression of lubricating oil.
Innovation Solution
A sealed compressor design with a suction port positioned above the center of a funnel-shaped refrigerant receiver section, reducing the suction of lubricating oil bubbles into the compression chamber, and an inlet pipe with a greater cross-sectional area than the exit pipe to facilitate refrigerant gas flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the suction port is placed at a low position relative to the oil level, then the refrigerant gas can be efficiently suctioned into the sealed container, but bubbles of lubricating oil are suctioned into the compression chamber causing noise
Solution Approach 1:
The suction port is divided into an upper suction port and a lower suction port. The upper suction port is positioned above the oil level to suction refrigerant gas without oil bubbles, while the lower suction port is positioned at or below the oil level to ensure efficient refrigerant gas suction. This segmentation allows the system to achieve both high productivity and low noise by utilizing different ports for different functions.
2Object-generated harmful factors
If the suction port is placed above the oil level, then lubricating oil bubbles are prevented from being suctioned into the compression chamber, but refrigerant gas suction efficiency is reduced
Solution Approach 1:
The suction port is divided into an upper suction port and a lower suction port. The upper suction port is positioned above the oil level to suction refrigerant gas without oil bubbles, while the lower suction port is positioned at or below the oil level to ensure efficient refrigerant gas suction. This segmentation allows the system to achieve both high productivity and low noise by utilizing different ports for different functions.
3Productivity
If the inlet pipe has a greater cross-sectional area than the exit pipe, then refrigerant gas flow is facilitated, but the device complexity increases
Solution Approach 1:
The inlet pipe is designed with a greater cross-sectional area than the exit pipe. This parameter change in the pipe dimensions allows for improved refrigerant gas flow efficiency by reducing flow resistance and enhancing gas circulation, while the overall device complexity remains manageable through straightforward dimensional adjustment rather than complex structural design.
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 configuration minimizes the suction of lubricating oil into the compression chamber, reducing noise generation and improving compressor performance by ensuring efficient refrigerant gas flow.
Implementation Method 1
Bubbles of lubricating oil are suctioned into the compression chamber during start-up, causing noise due to the low position of the suction port relative to the oil level
Data Source
AI summary
A sealed compressor of the present invention comprises an electric component (110); a compression component (112); a sealed container (102) which accommodates the electric component (110) and the compression component (112) and stores lubricating oil (104) therein; and a suction pipe (170) which is provided to penetrate a wall portion of the sealed container (102), and through which a refrigerant gas suctioned into the sealed container (102) flows; wherein the compression component (112) includes a compression chamber (142) formed within a cylinder (134) and a suction muffler (146) through which the refrigerant gas flows; wherein the suction muffler (146) includes a muffling space (150), an exit pipe (154), an inlet pipe (152), whose suction port (151) opens in a substantially horizontal direction in the interior of the sealed container (102), a funnel-shaped refrigerant receiver section (160) provided to surround the suction port (151); and wherein the suction port (151) is placed such that its center (151A) is located above than a center (160A) of the refrigerant receiver section (160).