Scroll Compressor Suction Guide Reducing Refrigerant Heat Transfer
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Solution Overview
Problem
In low-pressure scroll compressors, suction refrigerant is heated due to contact with the driving motor and high/low pressure separation plate, leading to increased specific volume and suction loss.
Innovation Solution
A scroll compressor with a suction guide that directs refrigerant from the refrigerant suction pipe to the compression chamber, preventing contact with the high/low pressure separation plate and reducing heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If suction refrigerant is allowed to cool the driving motor by flowing through the low-pressure part, then motor cooling effect is improved, but refrigerant temperature increases causing increased specific volume and suction loss
Solution Approach 1:
The suction refrigerant flow path is segmented into multiple paths: one path directs refrigerant to cool the driving motor in the low-pressure part, while another path directs refrigerant directly to the suction pressure chamber through the suction guide. This segmentation allows simultaneous motor cooling and maintenance of suction refrigerant temperature, resolving the contradiction between cooling effect and suction loss.
2Device complexity
If suction refrigerant contacts the high/low pressure separation plate, then structural simplicity is maintained, but refrigerant is heated causing increased specific volume and suction loss
Solution Approach 1:
The suction guide acts as an intermediary component that directs suction refrigerant from the low-pressure part directly to the suction pressure chamber, preventing contact with the high/low pressure separation plate. This intermediary structure eliminates harmful heat transfer while maintaining overall structural simplicity, resolving the contradiction between structural simplicity and suction loss.
3Temperature
If the inlet of the suction conduit is spaced apart from the refrigerant suction pipe, then some refrigerant can be introduced into the low-pressure part for motor cooling, but most refrigerant is still directed to the compression chamber reducing cooling effect
Solution Approach 1:
The suction guide is designed with a passage inlet that can be positioned at different locations relative to the refrigerant suction pipe outlet, allowing dynamic adjustment of refrigerant distribution. By optimizing the spacing and positioning, the system achieves balanced refrigerant distribution between motor cooling and compression chamber supply, resolving the contradiction between cooling effect and suction loss.
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 suction guide effectively reduces the specific volume of suction refrigerant, enhancing compressor efficiency and preventing overheating of the driving motor.
Implementation Method 1
preventing contact with the high/low pressure separation plate and reducing heat transfer
Implementation Method 2
suction refrigerant is increased in temperature due to a contact with the driving motor and then suctioned into the compression chamber. This may increase a specific volume in the suction pressure chamber
Data Source
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AI summary
Scroll compressor comprising a driving motor (120) installed inside the low-pressure part of the casing (110), a suction guide (190,290) between a refrigerant suction pipe (117) and a high/low pressure separation plate (115), and the suction guide may be fastened to a non-orbiting scroll (150) or inserted into a suction guide protrusion (156) extending from the non-orbiting scroll.