Compressor
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Solution Overview
Problem
Conventional compressors face performance deterioration and power loss due to insufficient oil decompression when the pressure in the oil storage chamber exceeds a predetermined value, as the fixed orifice hole diameter in the decompression mechanism cannot adequately reduce the oil pressure, leading to increased flow rates and higher suction space pressures.
Innovation Solution
The compressor incorporates a decompression mechanism with an orifice hole whose inner diameter varies based on the pressure in the oil storage chamber, utilizing an elastic orifice member that changes diameter in response to pressure changes, ensuring effective decompression and maintaining optimal suction space pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed orifice hole diameter is used in the decompression mechanism, then the structure is simple and easy to manufacture, but the oil decompression capacity is insufficient when the pressure in the oil storage chamber increases
Solution Approach 1:
The patent applies the dynamics principle by replacing the fixed orifice hole with a variable orifice hole whose diameter changes in response to pressure variations. The decompression mechanism includes a movable component that adjusts the orifice diameter dynamically: when pressure in the oil storage chamber increases, the orifice diameter decreases to maintain appropriate decompression capacity, and when pressure decreases, the orifice diameter increases. This dynamic adjustment resolves the contradiction by enabling the system to adapt to varying operating conditions while maintaining reliable decompression performance.
2Productivity
If the pressure in the oil storage chamber is increased to improve oil recovery, then the decompression mechanism cannot sufficiently reduce oil pressure, leading to increased suction space pressure and performance deterioration
Solution Approach 1:
The patent implements feedback control through the decompression mechanism that automatically responds to pressure changes in the oil storage chamber. The mechanism senses the pressure level and adjusts the orifice hole diameter accordingly: when pressure rises above a threshold, the orifice constricts to increase decompression resistance and reduce the pressure differential; when pressure drops, the orifice opens to allow greater decompression. This feedback mechanism ensures that oil recovery productivity is maintained while preventing excessive suction space pressure that would deteriorate compressor performance.
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 solution ensures sufficient decompression of oil into the suction space, preventing performance deterioration and power loss by adjusting the orifice hole diameter in response to increased pressures, thus maintaining optimal compressor performance.
Implementation Method 1
utilizing an elastic orifice member that changes diameter in response to pressure changes
Data Source
AI summary
A compressor includes a compression mechanism configured to suck and compress a refrigerant from a suction space to discharge the refrigerant to a discharge space by a driving force transmitted thereto. The compressor includes an oil storage chamber provided in the discharge space to collect oil separated from the refrigerant discharged from the compression mechanism, an oil recovery passage configured to guide the oil in the oil storage chamber to the suction space, and a decompression mechanism provided in the oil recovery passage to reduce a pressure of the oil passing through the oil recovery passage by an orifice hole having an inner diameter smaller than the oil recovery passage. The decompression mechanism is configured such that, when a pressure in the oil storage chamber is increased, the inner diameter of the orifice hole is reduced.