Compressor diffuser, compressor and refrigeration equipment

By setting an airflow channel on the diffuser, the problem of axial force imbalance in the air bearing is solved, thereby improving the reliability and efficiency of the compressor at high speeds and giving it a price advantage.

CN117469182BActive Publication Date: 2026-06-30GREE ELECTRIC APPLIANCE INC OF ZHUHAI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GREE ELECTRIC APPLIANCE INC OF ZHUHAI
Filing Date
2023-12-14
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Air-bearing bearings in centrifugal compressors suffer from axial force imbalance, which makes them prone to axial bearing wear failure.

Method used

An airflow channel connecting the volute flow channel and the back side of the impeller is set on the diffuser. The air pressure on the back side of the impeller is reduced by high-speed airflow, thereby improving the balance of the axial force of the air bearing.

Benefits of technology

While meeting the requirements of high-speed operation, it improves the reliability of the compressor and the balance of the bearings, reduces frictional losses, and has a price advantage.

✦ Generated by Eureka AI based on patent content.

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    Figure CN117469182B_ABST
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Abstract

This invention discloses a compressor diffuser, a compressor, and a refrigeration device. The diffuser is provided with an airflow channel connecting the volute flow channel and the back side of the impeller. The airflow channel provides high-speed airflow to the back side of the impeller, thereby reducing the air pressure on the back side of the impeller. This invention improves the balance of the axial force of the air-bearing bearing by reducing the air pressure drop on the back side of the impeller through the airflow channel connecting the volute flow channel and the back side of the impeller. While meeting the high-speed operating characteristics of a small-capacity air-bearing compressor, it also solves the problem of axial bearing rubbing failure in air-bearing compressors. This allows the compressor to meet high-speed operation while maintaining high reliability. Furthermore, due to its simple structure and high integration, this compressor also has a significant price advantage.
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