Patents by Inventor Du-soon Choi

Du-soon Choi 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).

  • Plastic heat exchanger and method of manufacturing the same
    Patent number: 8966757
    Abstract: Disclosed is a plastic heat exchanger in which, when a heat exchanger tube of the plastic heat exchanger is coupled to a header, the heat exchanger tube and a junction portion of the header are melted and pressed simultaneously through a heat fusion jig including a fusion portion and a fusion valley so as to secure reliability against leakage of refrigerant, and a method of manufacturing the same, by which the plastic heat exchanger can be mass-produced at low fabricating cost through simple processes. The present invention provides a method of fabricating a plastic heat exchanger, comprising a step of melting and pressing a plastic heat exchanger tube and a junction of a header by using a heat fusion jig, and a plastic heat exchanger fabricated by the method, thereby securing reliability against leakage of refrigerant, having heat exchange performance more excellent than or equal to a metallic heat exchanger and also mass-producing the plastic heat exchanger at low fabricating cost through simple processes.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: March 3, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Eon-seok Lee, Ho-geun Ryu, Du-soon Choi, Sang-Hoon Han
  • PLASTIC HEAT EXCHANGER AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20100012304
    Abstract: Disclosed is a plastic heat exchanger in which, when a heat exchanger tube of the plastic heat exchanger is coupled to a header, the heat exchanger tube and a junction portion of the header are melted and pressed simultaneously through a heat fusion jig including a fusion portion and a fusion valley so as to secure reliability against leakage of refrigerant, and a method of manufacturing the same, by which the plastic heat exchanger can be mass-produced at low fabricating cost through simple processes. The present invention provides a method of fabricating a plastic heat exchanger, comprising a step of melting and pressing a plastic heat exchanger tube and a junction of a header by using a heat fusion jig, and a plastic heat exchanger fabricated by the method, thereby securing reliability against leakage of refrigerant, having heat exchange performance more excellent than or equal to a metallic heat exchanger and also mass-producing the plastic heat exchanger at low fabricating cost through simple processes.
    Type: Application
    Filed: July 31, 2007
    Publication date: January 21, 2010
    Applicant: LG Chem, Ltd.
    Inventors: Eon-Seok Lee, Ho-geun Ryu, Du-soon Choi, Sang-Hoon Han