Rotary Compressor Oil Supply via Movable Partition Plate
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Solution Overview
Problem
In rotary compressors with two-stage compression, there is a challenge in adjusting the amount of oil supplied to the second stage compression chamber due to manufacturing process constraints and pressure bypass, leading to increased oil discharge and difficulty in reducing oil supply.
Innovation Solution
A rotary compressor design with an intermediate partition plate featuring an oil supply passage and an oil supply hole that opens and closes based on the crank angle of the second roller, allowing for adjustable oil supply through the oil supply hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an oil separator is externally mounted to separate oil from refrigerant, then oil separation is achieved, but the device complexity increases and the system requires external mounting and return circuitry
Solution Approach 1:
The patent merges the oil separation function with the existing sealed container structure by forming an oil separation chamber inside the container. The oil separation chamber is defined by the container wall and a partition wall, eliminating the need for external oil separators and reducing system complexity while maintaining effective oil separation through centrifugal force generated by rotor rotation.
Solution Approach 2:
The oil separation chamber is nested within the sealed container structure. The partition wall creates a nested chamber that utilizes the existing container space, allowing oil separation functionality to be integrated without adding external components or increasing overall device footprint.
2Reliability
If intermediate pressure oil is supplied into the second stage compression chamber to improve sealability, then sealability is improved, but the amount of oil discharged increases
Solution Approach 1:
The patent introduces a movable partition wall that can dynamically adjust its position to control oil supply to the second stage compression chamber. The partition wall is movable relative to the container wall, allowing dynamic control of oil flow based on operational requirements, thereby reducing unnecessary oil discharge while maintaining adequate sealability during compression strokes.
Solution Approach 2:
The patent changes the positional parameter of the partition wall to control oil supply. By adjusting the partition wall's position and movement characteristics, the system optimizes the amount of oil supplied to the second stage chamber, reducing oil discharge while maintaining sufficient oil for sealability during the compression process.
3Reliability
If the oil supply hole is always open to ensure oil supply, then oil supply is reliable, but pressure bypass occurs and oil discharge increases
Solution Approach 1:
The patent makes the partition wall movable to dynamically control the oil supply hole opening. The partition wall can move to open or close the oil supply hole based on the operational state, preventing pressure bypass during compression strokes while ensuring reliable oil supply when needed, thereby reducing energy loss.
Solution Approach 2:
The movable partition wall operates periodically, opening the oil supply hole during appropriate phases and closing it during compression strokes. This periodic action prevents continuous pressure bypass while ensuring oil supply is available when required, reducing energy loss from unnecessary oil flow during compression.
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 enables precise adjustment of the oil supply amount through the oil supply hole, reducing oil discharge and improving the efficiency of oil distribution within the compressor.
Implementation Method 1
an oil supply hole 62 that communicates between the oil supply passage 61 and a second compression chamber 50 of the second stage rotary compression mechanism is formed, and the oil supply hole 62 is formed at a position to be opened where a second roller 53 of the second stage rotary compression mechanism is at a position other than a compression stroke
Data Source
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AI summary
Provided is a rotary compressor in which an amount of oil to be supplied through an oil supply hole can be properly adjusted with a simple configuration. The rotary compressor comprises, in a sealed container 10, a drive motor 20, a first stage rotary compression mechanism 30 and a second stage rotary compression mechanism 31 that are rotated and driven by rotation of the drive motor 20, and an intermediate partition plate 32 provided between the first stage rotary compression mechanism 30 and the second stage rotary compression mechanism 31. In the intermediate partition plate 32, an oil supply passage 61 that extends from a center of the sealed container 10 toward outside is provided, an oil supply hole 62 that communicates between the oil supply passage 61 and a second compression chamber 50 of the second stage rotary compression mechanism 31 is formed, and the oil supply hole 62 is formed at a position to be opened in a case where a second roller 53 of the second stage rotary compression mechanism 31 is at a position other than a compression stroke.