Patents by Inventor Shouqing Chang

Shouqing Chang 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).

  • Condensing heat-exchange copper tube for an flooded type electrical refrigeration unit
    Patent number: 7762318
    Abstract: The present invention discloses a condensing heat-exchange copper tube for a flooded type electrical refrigeration unit, which comprises a smooth surface portion, a finned portion provided with plurality of fins and a transitional portion connecting the smooth surface portion to the finned portion. Said fin includes a fin base close to the outer surface of the heat-exchange tube and a fin top away from the outer surface. Said fin is further provided with a secondary fin at the central portion of the fin and a third fin at the top portion of the fin, wherein a certain distance is provided between two axially adjacent secondary fins or two axially adjacent third fins. Secondary fins as well as third fins according to the invention further increase the heat transfer area for the heat-exchange tube. Meanwhile, secondary fins and third fins help to attenuate the condensate film such that the condensate film is substantially eliminated, and vapor condensation and heat transfer may be carried out in a better way.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: July 27, 2010
    Assignee: Golden Dragon Precise Copper Tube Group, Inc.
    Inventors: Chuanfu Yu, Qiang Jiang, Jianjun Yan, Shouqing Chang
  • Condensing heat-exchange copper tube for an flooded type electrical refrigeration unit
    Publication number: 20070131396
    Abstract: The present invention discloses a condensing heat-exchange copper tube for a flooded type electrical refrigeration unit, which comprises a smooth surface portion, a finned portion provided with plurality of fins and a transitional portion connecting the smooth surface portion to the finned portion. Said fin includes a fin base close to the outer surface of the heat-exchange tube and a fin top away from the outer surface. Said fin is further provided with a secondary fin at the central portion of the fin and a third fin at the top portion of the fin, wherein a certain distance is provided between two axially adjacent secondary fins or two axially adjacent third fins. Secondary fins as well as third fins according to the invention further increase the heat transfer area for the heat-exchange tube. Meanwhile, secondary fins and third fins help to attenuate the condensate film such that the condensate film is substantially eliminated, and vapor condensation and heat transfer may be carried out in a better way.
    Type: Application
    Filed: December 12, 2006
    Publication date: June 14, 2007
    Inventors: Chuanfu Yu, Qiang Jiang, Jianjun Yan, Shouqing Chang