Semi-hermetic Compressor Motor Inlet Particle Filtration
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Solution Overview
Problem
Semi-hermetic refrigerant compressors face issues with particles carried by the refrigerant causing damage to the electric motor and compressor unit.
Innovation Solution
An inlet for refrigerant is designed with a cover that includes a filter element and access guide elements to separate particles, directing the refrigerant flow towards the electric motor for optimal cooling while collecting and guiding particles away from the motor compartment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If refrigerant is supplied directly to the motor compartment without filtration, then the cooling function is simple and efficient, but particles carried by the refrigerant cause damage to the electric motor and compressor unit
Solution Approach 1:
The patent introduces a cover with a filter element as an intermediary component between the refrigerant inlet and the motor compartment. This intermediary structure filters particles from the refrigerant while allowing the refrigerant to pass through and cool the motor, thus protecting the motor from particle damage without completely blocking the cooling function
Solution Approach 2:
The inlet structure is segmented into multiple functional components: a cover, a filter element, access guide elements, and a particle collection area. This segmentation allows each component to perform its specific function (filtration, guidance, collection) while working together as an integrated system to protect the motor
2Reliability
If a filter element is added to the inlet to remove particles, then particle damage is prevented, but the inlet structure becomes more complex with additional components
Solution Approach 1:
The patent merges multiple functions into a single integrated cover structure. The cover combines the filter element, access guide elements, and particle collection area into one unified component that attaches to the motor housing, simplifying the overall structure compared to having separate components for each function
3Temperature
If the refrigerant flow is directed towards the rotor for cooling, then cooling efficiency is improved, but particles may be carried directly into the motor components
Solution Approach 1:
The filter element performs preliminary action by removing particles from the refrigerant before the refrigerant enters the motor compartment and contacts the rotor and stator. This preliminary filtration ensures that the refrigerant flow directed towards the rotor for cooling does not carry harmful particles that could damage the motor components
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 solution effectively filters out particles, preventing damage to the electric motor and compressor unit, and optimizes refrigerant flow for efficient cooling.
Implementation Method 1
a filter element for separating particles entrained by the refrigerant
Implementation Method 2
the refrigerant flow thus directed can be optimally used for cooling the electric motor
Data Source
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AI summary
In order to improve a semi-hermetic refrigerant compressor, comprising a compressor unit and an electric motor, an overall housing which has a motor housing section for the electric motor and a compressor housing section for the compressor unit, a suction-side refrigerant path leading from a suction connection on the overall housing to the compressor unit and a pressure-side refrigerant path leading to a pressure connection of the compressor unit, in such a way that problems with particles entrained by the refrigerant from the refrigerant circuit are avoided, it is provided that an inlet for refrigerant to be supplied to a motor compartment in the motor housing section is arranged on the motor housing section in a region opposite the compressor housing section and that the inlet is provided with a cover which has an access guide element and a filter element for separating particles entrained by the refrigerant.