Linear compressor
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Solution Overview
Problem
In linear compressors, the refrigerant's contact with the piston leads to overheating, reducing compression efficiency and causing refrigerant backflow, which results in insufficient refrigerant in the compression chamber and increased piston temperature.
Innovation Solution
A muffler is designed to be in close contact with the piston's inner wall, preventing the refrigerant from coming into contact with the piston while flowing through, thereby reducing heat transfer and maintaining the refrigerant's flow within the compression space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the refrigerant flows through the muffler to the piston, then the refrigerant can be supplied into the compression chamber, but the refrigerant contacts the piston inner wall causing overheating and compression efficiency deterioration
Solution Approach 1:
The patent introduces a flow guide as an intermediary component between the muffler and the piston. This flow guide directs the refrigerant flow along the piston inner wall without allowing direct contact, thereby mediating between the need for refrigerant supply and the need to prevent overheating. The flow guide acts as a mediator that enables refrigerant flow while preventing the harmful thermal contact.
2Quantity of substance
If the refrigerant pressure is low, then the refrigerant can flow through the muffler, but the refrigerant flows backward to the piston from the compression chamber
Solution Approach 1:
The flow guide serves as a mediator that ensures unidirectional refrigerant flow. By providing a guided path from the muffler to the compression chamber, it prevents backward flow even when pressure differential is small. The flow guide mediates between the low-pressure refrigerant flow and the compression chamber, maintaining flow direction stability.
3Temperature
If the refrigerant contacts the piston inner wall, then heat transfer occurs, but compression efficiency is deteriorated due to overheating
Solution Approach 1:
The flow guide acts as an intermediary that allows controlled thermal interaction. It enables the refrigerant to flow along the piston wall for heat transfer purposes while preventing direct contact that would cause excessive heating and efficiency loss. The flow guide mediates the thermal exchange between refrigerant and piston.
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 enhances compression efficiency by minimizing heat transfer and refrigerant backflow, ensuring sufficient refrigerant in the compression chamber and maintaining a lower piston temperature.
Implementation Method 1
The linear motor is configured such that a permanent magnet is positioned between an inner stator and an outer stator, and the permanent magnet is reciprocated straight by interactive electromagnetic force between the permanent magnet and the inner (or outer) stator.
Implementation Method 2
the refrigerant in the compression chamber is compressed when the piston moves from the bottom dead center to the top dead center
Data Source
AI summary
The present disclosure relates to a linear compressor. The linear compressor according to an aspect of the present disclosure includes a shell, a cylinder, a piston, and a muffler. Also, an internal space in which at least a portion of the muffler is inserted is formed in the piston, and the muffler is disposed in contact with the inner wall of the piston forming the internal space.