Qingpeng Ji

Title: Qingpeng Ji and His Patent for Refrigeration-System Motor Cooling

Introduction

Qingpeng Ji is an inventor based in Shanghai, China, associated with the Shanghai Marine Diesel Engine Research Institute. His work includes an invention addressing the sealing and cooling of magnetic levitation motors used in refrigeration systems. The supplied information lists 1 patent for Ji.

Latest Patents

Ji’s listed patent is “Magnetic levitation motor sealing-cooling apparatus for refrigeration system and method therefor.” The invention combines air cooling and water cooling to manage the temperatures of the first-stage and second-stage compressor motors. Cooling gas for the second-stage compressor is drawn from working medium cooled at the first-stage compressor’s outlet, while cooling gas for the first-stage compressor comes from the second-stage motor cavity’s outlet. Cooling-water loops are also provided in both motor housings.

The patent further describes impeller-back and shaft-sealing structures for the first-stage compressor, second-stage compressor, and expander. A portion of the working medium leaving the second-stage compressor is directed into the expander to serve as sealing gas.

Career Highlights

The available information connects Ji’s inventive work with the Shanghai Marine Diesel Engine Research Institute. His listed patent focuses on integrating motor cooling and sealing arrangements within a refrigeration system.

Collaborations

The supplied information identifies Yan Zhang and Qiye Jin as Ji’s coworkers. It does not specify their roles in the patent or describe particular collaborative contributions.

Conclusion

Qingpeng Ji’s listed invention combines cooling and sealing techniques for magnetic levitation compressor motors and an expander in a refrigeration system.