Fluid Guide in Hermetic Compressor Intermediate Chamber
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Solution Overview
Problem
In two-stage hermetic compressors, oil accumulation in the intermediate chamber leads to reduced second pressure reduction and frictional losses due to insufficient oil supply to the second compression device, caused by the design of the intermediate chamber and secondary suction channel.
Innovation Solution
A fluid guide is installed in the intermediate chamber to smoothly direct refrigerant and oil from the first compression chamber to the second compression chamber, preventing oil accumulation and ensuring adequate oil supply, which is achieved through a pipe or plate-shaped guide that enhances oil suction and reduces flow resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the inner space of the intermediate chamber is increased to reduce pressure and pressure pulsation, then pressure reduction is improved, but oil accumulation occurs in the intermediate chamber
Solution Approach 1:
A fluid guide is introduced as an intermediary component in the intermediate chamber to mediate between the refrigerant flow and oil accumulation. The fluid guide directs the refrigerant flow to create a suction effect that actively draws oil from the intermediate chamber, preventing oil accumulation while maintaining the large inner space volume needed for pressure reduction.
2Stress or pressure
If the cross section of the secondary suction channel is increased to reduce pressure pulsation, then pressure pulsation reduction is improved, but oil accumulation occurs due to inlet positioning
Solution Approach 1:
The fluid guide acts as a mediator that redirects refrigerant flow through the secondary suction channel. By positioning the fluid guide appropriately, it creates a suction effect that actively draws oil toward the channel inlet, ensuring oil is carried along with the refrigerant flow even when the channel cross section is large.
Solution Approach 2:
The invention utilizes pneumatic principles by leveraging the refrigerant flow dynamics to create a suction effect. The moving refrigerant gas acts as a fluid that generates negative pressure zones, automatically drawing oil into the secondary suction channel without requiring additional mechanical pumping mechanisms.
3Stress or pressure
If the intermediate chamber volume is increased to reduce pressure, then pressure reduction is improved, but frictional loss increases due to insufficient oil supply to the second compression device
Solution Approach 1:
The fluid guide serves as an intermediary that ensures adequate oil supply to the second compression device. By creating a suction effect that actively draws oil from the intermediate chamber, it maintains proper lubrication levels even when the chamber volume is large, thereby preventing frictional losses in the second compression device.
Solution Approach 2:
The fluid guide establishes a continuous oil supply mechanism to the second compression device. The suction effect created by refrigerant flow continuously draws oil from the intermediate chamber, ensuring uninterrupted lubrication and preventing frictional losses throughout the compression cycle.
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 fluid guide effectively minimizes oil accumulation, reduces noise, and prevents oil shortages in the second compression device, thereby enhancing the compressor's efficiency and performance by ensuring consistent oil supply and reducing frictional losses.
Implementation Method 1
a fluid guide installed in the intermediate chamber and configured to guide fluid introduced into an inner space of the intermediate chamber toward an outside of the intermediate chamber
Data Source
AI summary
A hermetic compressor is provided that may include a fluid guide disposed in an inner space of an intermediate chamber, so as to guide oil, discharged from a first compression chamber of a first compression device into the inner space of the intermediate chamber, to a second compression chamber of a second compression device without remaining in the inner space of the intermediate chamber, whereby noise generated due to an excessive amount of oil remaining in the inner space of the intermediate chamber may be reduced, and simultaneously a shortage of oil in the second compression device may be prevented.