Patents by Inventor Kenta Fujiwara

Kenta Fujiwara 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: 9335071
    Abstract: An air conditioning apparatus includes a compressor, indoor and outdoor heat exchangers, an indoor fan, an expansion valve, a refrigerant-pressure-perceiving part, which perceives a pressure of refrigerant sent from the compressor to the indoor heat exchanger, and a control part, which performs startup fan control in which the indoor fan remains stopped until the compressor goes from being at rest to starting up and the pressure perceived reaches a high-pressure threshold. The control part repeats an action of reducing a flow rate of the indoor fan or stopping driving of the indoor fan when the pressure perceived is equal to or less than a low-pressure lower than the high-pressure threshold, and an action of increasing the flow rate of the indoor fan or initiating driving of the indoor fan when the pressure perceived reaches or exceeds a pressure threshold which is higher than the low-pressure threshold.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: May 10, 2016
    Assignee: Daikin Industries, Ltd.
    Inventors: Hidehiko Kinoshita, Tsuyoshi Yamada, Junichi Shimoda, Kenta Fujiwara
  • Publication number: 20120023989
    Abstract: An air conditioning apparatus includes a compressor, an indoor and outdoor heat exchangers, an indoor fan, an outdoor expansion element, a refrigerant-pressure-perceiving part, which perceives a pressure of refrigerant sent from the compressor to the indoor heat exchanger, and a control part, which performs startup fan control in which the indoor fan remains stopped until the compression element goes from being at rest to starting up and the pressure perceived reaches a high-pressure threshold, the indoor fan is driven when the pressure perceived reaches or exceeds the high-pressure threshold. An action of reducing or stopping air volume of the indoor fan when the pressure perceived decreases to or falls below a low-pressure lower than the high-pressure threshold, and an action of increasing air volume or initiating driving of the indoor fan when the pressure perceived reaches or exceeds a pressure threshold which is higher than the low-pressure threshold.
    Type: Application
    Filed: March 18, 2010
    Publication date: February 2, 2012
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Hidehiko Kinoshita, Tsuyoshi Yamada, Junichi Shimoda, Kenta Fujiwara