Suction Muffler Outlet Structure to Block Oil in Sealed Compressors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In existing sealed compressors, oil can flow into the compression chamber in large amounts, leading to increased load, reduced refrigeration efficiency, noise generation, and potential degradation of heat exchangers due to oil droplets being moved by refrigerant flow into the compression chamber.
Innovation Solution
A sealed compressor design featuring a suction muffler with a close-sided space near the bent portion of the outlet tube, preventing oil from flowing into the compression chamber by utilizing a close-sided space formed by the first and second outlet tube portions, which inhibits oil movement into the compression chamber and allows for efficient refrigerant flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oil supply mechanism rotates crankshaft to lubricate components, then lubrication is improved, but oil flows into compression chamber in large amounts causing increased load and reduced efficiency
Solution Approach 1:
The outlet tube is segmented into multiple portions (first outlet tube portion, second outlet tube portion, third outlet tube portion) with different orientations. This segmentation allows the oil-separated refrigerant to flow through a controlled path that prevents oil from entering the compression chamber, thus maintaining lubrication benefits while eliminating the harmful effect of excessive oil flow.
Solution Approach 2:
The suction muffler acts as an intermediary device between the oil supply mechanism and the compression chamber. It separates oil from refrigerant before the refrigerant enters the compression chamber, allowing lubrication to occur in the muffler while preventing oil contamination in the compression chamber, thereby resolving the contradiction between lubrication needs and refrigeration efficiency.
2Device complexity
If outlet tube extends directly from muffler space to suction valve, then structure is simple, but oil droplets move along inner wall into compression chamber causing noise and heat exchanger degradation
Solution Approach 1:
The outlet tube is divided into multiple segments with different spatial orientations. The first portion extends substantially horizontally, the second portion extends substantially vertically, and the third portion extends substantially horizontally again. This segmented configuration creates a complex flow path that prevents oil droplets from traveling directly to the compression chamber, eliminating noise and heat exchanger degradation while maintaining structural feasibility.
Solution Approach 2:
The outlet tube transitions from a simple linear structure to a multi-dimensional configuration with horizontal and vertical portions. This dimensional change creates a flow path that utilizes spatial separation to prevent oil droplets from reaching the compression chamber, effectively eliminating harmful effects without significantly increasing structural complexity.
3Volume of moving object
If bent portion is formed in outlet tube to reduce height, then compactness is improved, but oil adheres to inner wall and flows into compression chamber in large amounts
Solution Approach 1:
The outlet tube is segmented into multiple portions that create a stepped configuration rather than a simple bend. This segmentation allows the tube to achieve height reduction while creating flow direction changes that prevent oil from adhering to walls and flowing into the compression chamber, thus resolving the contradiction between compactness and oil flow control.
Solution Approach 2:
Different portions of the outlet tube have different local qualities in terms of orientation and function. The horizontal portions facilitate refrigerant flow while the vertical portion creates a barrier against oil flow. This local differentiation allows the tube to be compact while effectively preventing oil from entering the compression chamber.
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 design effectively prevents oil from entering the compression chamber, reducing noise and stabilizing compressor performance while maintaining high refrigeration efficiency and compact dimensions.
Implementation Method 1
suction muffler 47 reduces noise generated by intermittent suction of refrigerant 5
Implementation Method 2
prevents refrigerant 5 passing through suction muffler 47 from being heated since it is made of a resin having a small thermal conductivity
Implementation Method 3
oil supply mechanism 43 carries oil 3 from the bottom of sealed container 1 to compressive component 13 by utilizing a centrifugal force or the like generated by the rotation of crankshaft 23
Implementation Method 4
crankshaft 23 includes eccentric shaft 19 and main shaft 21... oil supply mechanism 43 including a spiral groove formed on main shaft 21
Data Source
AI summary
There is disclosed a sealed compressor in which a compressive component housed inside of a sealed container comprises a block, a suction valve, a piston, and a suction muffler, the suction muffler including a muffler body defining a muffler space and an outlet tube communicating the muffler space with the suction valve, the outlet tube having a bent portion bent in a middle portion between an opening exposed to the muffler space and an opening in a vicinity of the suction valve, a first outlet tube portion extending from the bent portion toward the muffler space, and a second outlet tube portion extending from the bent portion toward the suction valve, wherein a close sided space is formed in a vicinity of the bent portion, the close sided space having one end in communication with the outlet tube and the other end closed.