Patents by Inventor Toyo Sumi

Toyo Sumi 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).

  • Air conditioner having outdoor air introducing mechanism
    Patent number: 4941326
    Abstract: An air conditioner in which an outdoor unit having a compressor, a condenser, and expansion valve and an outdoor fan and an indoor unit having an evaporator and an indoor fan are connected by a piping to form a refrigerating cycle, and which has an outdoor air introducing mechanism including a damper disposed in an air flow path of the indoor fan of the indoor unit so as to enable introduction of outdoor air into the room. The air conditioner has: a comparison means for periodically comparing the room temperature with a room temperature set point; an alteration means for altering, on the basis of the output from the comparison means, a mixed air temperature initial set point preliminarily determined; and a control means for controlling the operations of the outdoor air introduction damper, the outdoor and indoor fans and the compressor.
    Type: Grant
    Filed: October 21, 1988
    Date of Patent: July 17, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Toyo Sumi, Motoshi Miyanaka, Keiji Sato, Yoshiki Hayata