Cooling system for variable frequency drive associated with transport refrigeration unit
CN120792441APending Publication Date: 2025-10-17CARRIER CORP
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Patent Information
- Application Number
- CN202510432305.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-04-10
- Filing Date
- 2025-04-08
- Publication Date
- 2025-10-17
AI Technical Summary
Technical Problem
The variable frequency drives in existing transport refrigeration units degrade or shut down when the temperature rises, and struggle to maintain peak performance under strict thermal constraints.
Method used
A cooling system is configured for the variable frequency drive (VFD), with some or all of it located in the carburetor compartment. The carburetor coils are used to cool the VFD by allowing air to flow through the heat dissipation structure. The fan speed is controlled to adjust the cooling airflow rate.
Benefits of technology
Effectively maintain the variable frequency drive at a safe and operable temperature to ensure its optimal performance and reliability, and avoid performance degradation or shutdown due to temperature rise.
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Figure CN120792441A_ABST
Abstract
A transport refrigeration unit (TRU) is described herein. The TRU includes a vaporizer and a variable frequency drive (VFD) operably coupled to a compressor and / or a vaporizer fan associated with the TRU, where at least a portion of the VFD is disposed downstream or upstream of a vaporizer coil of the vaporizer in a vaporizer compartment associated with the TRU.
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