Patents by Inventor Kwon Sik HWANG

Kwon Sik HWANG 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).

  • Patent number: 11364773
    Abstract: A plate-type heat exchanger including a body plate, an upper plate, and a lower plate. The body plate includes a plurality of alternately stacked plates, a space between the plurality of plates having a first heat exchange passage through which a first refrigerant of high temperature and high pressure flows, and a second heat exchange passage through which a second refrigerant of low temperature and low pressure flows. A heat exchange between the first refrigerant and the second refrigerant is performed in the body plate. The upper plate is bonded to a front side of the body plate and having a first inlet hole through which the first refrigerant is introduced and a first outlet hole through which the second refrigerant is discharged. The lower plate is bonded to a rear side of the body plate and having a second inlet hole through which the second refrigerant is introduced and a second outlet hole through which the first refrigerant is discharged.
    Type: Grant
    Filed: October 8, 2020
    Date of Patent: June 21, 2022
    Assignee: HS R & A CO., LTD.
    Inventors: Jae Hyeok Choi, Deok Hyun Lim, Young Jun Kim, Kwon Sik Hwang
  • Publication number: 20220153088
    Abstract: A piping system for an air conditioner that includes a refrigerant pipe that is formed of a plastic material and has a multi-layered pipe structure including an outer layer and an inner layer. The piping system provides a fluid flow between parts constituting the air conditioner system. A first flange formed of the plastic material and providing a connection between the refrigerant pipe and components constituting the air conditioner system. A second flange formed of the plastic material and connected to a charging valve for injecting a refrigerant into the refrigerant pipe.
    Type: Application
    Filed: November 8, 2021
    Publication date: May 19, 2022
    Applicant: HS R & A Co.,Ltd.
    Inventors: Jae Hyeok CHOI, Deok Hyun Lim, Young Jun Kim, Seung Hoon Sung, Kwon Sik Hwang
  • Patent number: 11002387
    Abstract: A brake hose comprising according to the disclosure may include: a tube-shaped inner rubber layer filled with a brake fluid; and a first reinforcing fiber layer, an intermediate rubber layer, a second reinforcing layer, and an outer rubber layer, which sequentially surround an outer circumferential surface of the inner rubber layer, wherein the first reinforcing fiber layer has a structure in which a plurality of layers of butyl rubber, which is a material having a high loss factor, are stacked on a PET fiber to improve vibration insulating performance, and various exemplary embodiments may be possible.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: May 11, 2021
    Assignee: HS R & A Co., Ltd.
    Inventors: Jae Hyeok Choi, Deok Hyun Lim, Kwon Sik Hwang
  • Publication number: 20210107336
    Abstract: A plate-type heat exchanger including a body plate, an upper plate, and a lower plate. The body plate includes a plurality of alternately stacked plates, a space between the plurality of plates having a first heat exchange passage through which a first refrigerant of high temperature and high pressure flows, and a second heat exchange passage through which a second refrigerant of low temperature and low pressure flows. A heat exchange between the first refrigerant and the second refrigerant is performed in the body plate. The upper plate is bonded to a front side of the body plate and having a first inlet hole through which the first refrigerant is introduced and a first outlet hole through which the second refrigerant is discharged. The lower plate is bonded to a rear side of the body plate and having a second inlet hole through which the second refrigerant is introduced and a second outlet hole through which the first refrigerant is discharged.
    Type: Application
    Filed: October 8, 2020
    Publication date: April 15, 2021
    Applicant: HS R & A Co.,Ltd.
    Inventors: Jae Hyeok CHOI, Deok Hyun LIM, Young Jun KIM, Kwon Sik HWANG