Linear Compressor Passage Guide for Refrigerant Heat Exchange Control
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Solution Overview
Problem
In linear compressors, the suction refrigerant is overheated due to heat transfer from the discharge cover, frame, and cylinder, leading to reduced compression efficiency, and there is inadequate heat exchange between the discharge cover and shell refrigerant, resulting in inefficient cooling.
Innovation Solution
A linear compressor design incorporating a passage guide that increases the flow rate of shell refrigerant to enhance heat exchange between the discharge cover, frame, and shell refrigerant, while minimizing the contact area between the discharge cover and frame to reduce heat transfer to the piston and cylinder, thereby improving 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 to ensure structural stability, then the structural integrity is improved, but the area of the frame exposed to shell refrigerant is reduced, resulting in insufficient heat exchange
Solution Approach 1:
The discharge cover is segmented from the frame structure, allowing the frame to extend beyond the discharge cover boundaries. This segmentation enables the frame to have both a coupling portion connected to the discharge cover and an exposed portion that contacts shell refrigerant, thereby maintaining structural integrity while enhancing heat exchange capability.
2Temperature
If the frame, piston, and cylinder are coupled to contact each other to transfer heat, then heat transfer is improved, but the suction refrigerant is overheated, deteriorating compression efficiency
Solution Approach 1:
The frame is designed with differentiated thermal conductivity in different regions: the discharge cover coupling portion has high thermal conductivity to efficiently transfer heat from the discharge cover, while the piston and cylinder coupling portions have low thermal conductivity to minimize heat transfer to the suction refrigerant. This local quality differentiation resolves the contradiction between heat transfer efficiency and compression efficiency.
3Stability of the object's composition
If the discharge cover is entirely coupled to the frame, then the structural stability is improved, but the area of the frame exposed to shell refrigerant is reduced, resulting in insufficient convection heat exchange
Solution Approach 1:
The frame is segmented into a discharge cover coupling portion and an exposed portion. The exposed portion extends beyond the discharge cover and is specifically designed to contact shell refrigerant, creating a dedicated heat exchange zone. This segmentation allows the frame to maintain structural stability through coupling while simultaneously providing sufficient surface area for effective convection heat exchange with the shell refrigerant.
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
The enhanced heat exchange and reduced heat transfer effectively cool the suction refrigerant, improving compression efficiency by maintaining lower temperatures within the compressor components.
Implementation Method 1
a flow rate of the shell refrigerant increases so that a discharge cover and a frame are effectively heat-exchanged with the shell refrigerant
Implementation Method 2
a discharge cover and a frame are effectively heat-exchanged with the shell refrigerant
Implementation Method 3
heat transfer from the discharge cover, frame, and cylinder
Data Source
Figure 1
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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.