Nankai University

Danfoss (tianjin) Ltd.

Bin Zhao

He Ma

Li Yao

Guocun Li

Haixia Wang

Zhijin Fan

Zhiwei Shang

Nailou Zhang

Lai Chen

Xiaofeng Guo

Yujie Zhu

Qifan Wu

Bin Yu

Shuang Zhou

Dongyan Yang

Yongjian Guo

A phase loss detection device, a compressor including the same, and a phase loss detection method are disclosed. The phase loss detection device may include a signal converting circuit and a processor. The signal converting circuit is configured to convert voltage signals corresponding to respective phases of multiphase alternating current (AC) power monitored from a motor. The processor is configured to receive the converted voltage signals from the signal converting circuit, and configured to calculate, based on the converted voltage signals, one or more phase angles between the respective voltage signals. The processor is configured to determine that phase loss occurs if any one or more of the calculated phase angles deviate from a nominal value of a corresponding phase angle of the multiphase AC power by a value higher than a predetermined threshold. The phase loss detection can be performed in a convenient, effective and reliable way.

Phase loss detection device, compressor including the same, and phase loss detection method

A 556tricyclic spironolactone derivative is provided with a formula XI: The present invention also relates to its preparation method and its applications in the areas of insecticide, nematicide, fungicide and anti-viral agent. The 556tricyclic spironolactone derivatives in the present invention are high-performance, broad-spectrum, low-toxicity and low-ecological risk compounds with a wide range of applications in the areas of agriculture, horticulture, forestry and health.

5A5B6C tricyclic spirolactone derivative, preparation method therefor and use thereof

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Tianjin, China

Bin Zhao