Compressor overcurrent detection protection circuit and air conditioner

By designing a rectifier circuit, a PFC circuit, and software and hardware overcurrent detection protection circuits in the air-conditioning system, dual software and hardware protection of the compressor is achieved, solving the problem of poor compressor control caused by untimely MCU control logic in the existing technology and improving the reliability of compressor operation.

CN223334399UActive Publication Date: 2025-09-12HISENSE (GUANGDONG) AIR CONDITIONER
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Patent Information

Application Number
CN202422633542.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-29
Publication Date
2025-09-12
Estimated Expiration
2034-10-29

AI Technical Summary

Technical Problem

The compressor protection circuit in the existing air-conditioning system relies on the MCU control logic. Inadequate software processing may lead to poor compressor control and a lack of hardware protection measures.

Method used

A compressor overcurrent detection and protection circuit is designed, including a rectifier circuit, a PFC circuit, a software overcurrent detection and protection circuit, and a hardware overcurrent detection and protection circuit. By detecting the voltage change of the sampling resistor caused by the on-current change of the IGBT tube in the PFC circuit, dual software and hardware protection is achieved.

Benefits of technology

It effectively improves the reliability of compressor operation, ensuring timely hardware and software dual protection when current is abnormal to avoid poor control.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a compressor over-current detection protection circuit and an air conditioner. The compressor over-current detection protection circuit comprises a rectification circuit, a PFC circuit, a software over-current detection protection press circuit and a hardware over-current detection protection press circuit. The software over-current detection protection press circuit is connected with the PFC circuit; the software over-current detection protection press circuit comprises a comparator and a second capacitor C2, the input end of the comparator is connected with the sampling resistor R3, the second capacitor C2 is connected to the input end of the comparator in parallel, and the output end of the comparator is connected with the MCU; the hardware over-current detection protection press circuit is connected with the software over-current detection protection press circuit; the hardware over-current detection protection press circuit comprises a second switching device, the input end of the second switching device is connected with the output end of the comparator, and the output end of the second switching device is connected with a current detection pin of the press IPM module. According to the utility model, compressor software and hardware dual protection can be realized, and the operation reliability of the compressor is effectively improved.
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