Patents by Inventor Dongjun Xu

Dongjun Xu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240383080
    Abstract: The present invention relates to the field of heat exchange technology, specifically to a composite process and system for producing a profiled microchannel plate heat exchanger. This process integrates selective laser melting additive manufacturing with micro electrical discharge machining to create microchannel plate heat exchangers featuring large aspect ratio flow channels and closed profile section flow channels. It enables the fabrication of channels with various cross-sections, such as circular and rectangular, as well as hollow closed profile section flow channels, including micro circular and square holes. The process allows for high-precision machining of microchannels with any aspect ratio. Heat exchangers produced using this composite process can endure extreme high temperatures and pressures, offering superior environmental benefits and contamination-free performance compared to conventional microchannel heat exchangers.
    Type: Application
    Filed: July 30, 2024
    Publication date: November 21, 2024
    Inventors: Ting Ma, Dongjun Xu, Zhendong Han, Qiuwang Wang
  • Patent number: 11971223
    Abstract: The present invention relates to the field of printed circuit heat exchangers, and in particular, to a modular square-circular composite channel printed circuit heat exchanger. The modular square-circular composite channel printed circuit heat exchanger comprises a shell, wherein the shell is divided into an inlet diverter section, a first parallel heat exchange section, a core heat exchange section, a second parallel heat exchange section, and an outlet combiner section from left to right, a plurality of square fin channels and circular micro-channels are uniformly arranged in the shell along a length direction of the shell. According to the present invention, a ratio of an average thermal resistance of a hot side to an average thermal resistance of a cold side is close to 1, which ensures the heat exchange efficiency while taking into the account structure safety and prevents the local over-temperature.
    Type: Grant
    Filed: November 21, 2023
    Date of Patent: April 30, 2024
    Assignee: XI'AN JIAOTONG UNIVERSITY
    Inventors: Ting Ma, Dongjun Xu, Zhendong Han, Qiuwang Wang
  • Publication number: 20240085115
    Abstract: The present invention relates to the field of printed circuit heat exchangers, and in particular, to a modular square-circular composite channel printed circuit heat exchanger. The modular square-circular composite channel printed circuit heat exchanger comprises a shell, wherein the shell is divided into an inlet diverter section, a first parallel heat exchange section, a core heat exchange section, a second parallel heat exchange section, and an outlet combiner section from left to right, a plurality of square fin channels and circular micro-channels are uniformly arranged in the shell along a length direction of the shell. According to the present invention, a ratio of an average thermal resistance of a hot side to an average thermal resistance of a cold side is close to 1, which ensures the heat exchange efficiency while taking into the account structure safety and prevents the local over-temperature.
    Type: Application
    Filed: November 21, 2023
    Publication date: March 14, 2024
    Inventors: Ting Ma, Dongjun Xu, Zhendong Han, Qiuwang Wang