Patents by Inventor Toshio Kitagaki

Toshio Kitagaki 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).

  • External heat exchange unit with plurality of heat exchanger elements and fan devices and method for controlling fan devices
    Patent number: 4936107
    Abstract: An air conditioning apparatus includes an external heat-exchanger having upper and lower side heat-exchanger elements, arranged in a vertical direction, each having a plurality of fluid pipes, upper and lower fan devices disposed opposite to corresponding heat-exchanger elements, and a temperature sensor disposed on one end (discharge side during cooling) of the upper-most fluid pipe of the upper side heat-exchanger element for outputting a detection signal indicating the condensation temperature of the external heat-exchanger corresponding to the condensation pressure of the external heat-exchanger. The rotation speed of the upper side fan device is regulated in accordance with the detection signal from the sensor to control the condensation pressure of the upper and lower side heat-exchanger elements within a prescribed range.
    Type: Grant
    Filed: November 9, 1988
    Date of Patent: June 26, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshio Kitagaki, Fumihiro Kawano