Scroll Compressor Stator Winding Baffle for Motor Cooling
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Solution Overview
Problem
Conventional scroll compressors experience reduced cooling performance with low-density refrigerants like R32, leading to overheating of the electric motor, particularly the upper stator end winding, during high motor load.
Innovation Solution
A baffle is arranged inside the inner shell at the stator end winding of the electric motor to deflect the refrigerant flow, enhancing contact between the refrigerant and the stator winding, thereby improving heat transfer and cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional refrigerant flow path is used without baffle, then device complexity is low, but cooling efficiency deteriorates with low-density refrigerants
Solution Approach 1:
A baffle is introduced as an intermediary component between the refrigerant flow and the stator end winding. The baffle redirects the refrigerant flow to improve contact with the stator winding, enhancing heat transfer without significantly complicating the overall device structure
Solution Approach 2:
The baffle adds a spatial dimension to the refrigerant flow path by redirecting it towards the stator end winding area. This dimensional change in flow direction improves cooling efficiency without requiring fundamental structural redesign
2Adaptability or versatility
If low-density refrigerants (e.g., R32) are used, then environmental performance improves, but cooling performance deteriorates leading to motor overheating
Solution Approach 1:
The invention changes the flow path parameters by introducing a baffle that redirects refrigerant flow. This parameter change compensates for the lower density of modern refrigerants like R32, maintaining adequate cooling performance and preventing motor overheating while preserving environmental benefits
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 baffle configuration intensifies the refrigerant flow's contact with the stator end winding, effectively enhancing cooling efficiency and reducing the risk of overheating, especially when using low-density refrigerants.
Implementation Method 1
the baffle comprising deflecting means configured to deflect at least a part of a main refrigerant flow, flowing inside the inner shell (for example from a lower end of the electric motor towards an upper end of the electric motor), towards said stator end winding
Implementation Method 2
The presence of such a baffle ensures a more intensive contact between the refrigerant gas flow and the winding wires of the stator end winding, which results in improving heat transfer between the stator end winding and the refrigerant gas
Data Source
AI summary
The scroll compressor (2) comprises a hermetic enclosure (3) comprising an outer shell (4); a compression unit (11) arranged within the hermetic enclosure (3); an electric motor (21) configured to drive the compression unit (11), the electric motor (21) including a rotor (22) and a stator (23); and an inner shell (26) in which the electric motor (21) is arranged. A baffle (34) is arranged inside the inner shell (26) at a stator end winding (25) of the electric motor (21), the baffle (34) comprising deflecting means configured to deflect at least a part of a main refrigerant flow, flowing inside the inner shell (26), towards said stator end winding (25).