Linear Compressor Passage Guide for Shell Refrigerant Heat Exchange
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Solution Overview
Problem
Linear compressors face efficiency issues due to overheating of refrigerant, which deteriorates compression efficiency, and inadequate heat exchange between the discharge cover, frame, and shell refrigerant, leading to increased temperatures and reduced performance.
Innovation Solution
The design incorporates a passage guide to enhance the flow rate of shell refrigerant, minimizing heat transfer to the piston and cylinder, and optimizes the area of the discharge cover to maximize exposure to the shell refrigerant, thereby improving heat dissipation and compression efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the discharge cover is entirely coupled to the frame, then structural stability is improved, but the area of the frame exposed to shell refrigerant is reduced, worsening heat exchange efficiency
Solution Approach 1:
The discharge cover is divided into a first discharge cover and a second discharge cover that are separately coupled to the frame. This segmentation allows both covers to be fully coupled to the frame for structural stability while maintaining adequate exposure of the frame to shell refrigerant for heat exchange, as the frame extends beyond the combined area of both discharge covers.
2Use of energy by moving object
If the flow rate of shell refrigerant is slow, then energy consumption is reduced, but convection heat exchange between the discharge cover and shell refrigerant is insufficient, worsening heat dissipation
Solution Approach 1:
A refrigerant flow guide is introduced to dynamically adjust and optimize the flow path of shell refrigerant. The guide directs the refrigerant to flow along the outer surface of the frame and between the first and second discharge covers, enhancing convection heat exchange without requiring increased refrigerant flow rate or energy consumption.
3Device complexity
If heat transfer from discharge cover to piston and cylinder is not minimized, then thermal management is simplified, but suction refrigerant becomes overheated, worsening compression efficiency
Solution Approach 1:
The discharge cover is segmented into two separate covers that are independently coupled to the frame. This segmentation reduces the total area of the discharge cover in contact with the frame, thereby minimizing heat transfer to the piston and cylinder while maintaining structural stability through full coupling of both covers to the frame, preventing suction refrigerant overheating and improving compression efficiency.
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 effectively reduces heat transfer to the suction refrigerant, maintaining lower temperatures and enhancing compression efficiency by increasing convective heat transfer and minimizing heat absorption by the frame and cylinder.
Implementation Method 1
a passage guide disposed between the shell and the compressor body, and configured to increase a flow rate of the shell refrigerant so that the discharge cover and the frame are effectively heat-exchanged with the shell refrigerant
Implementation Method 2
The permanent magnet is driven to linearly reciprocate by electromagnetic force between the permanent magnet and the inner (or outer) stator
Implementation Method 3
The suction refrigerant is overheated to deteriorate compression efficiency. A frame, a piston, and a cylinder may be disposed to contact each other so that the heat of the frame is easily transferred to the piston and the cylinder by conduction
Data Source
AI summary
Provided is a linear compressor. Provided is a linear compressor. The linear compressor includes a shell defining an internal space, a compressor body disposed in the internal space, and a passage guide disposed between the shell and the compressor body. The passage guide may include a first guide part extending along an inner surface of the shell in an axial direction and a second guide part extending from the first guide part to the compressor body in a radial direction.