Patents by Inventor Tsunehisa Yumoto

Tsunehisa Yumoto 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: 7155925
    Abstract: It is an object of the present invention to provide a refrigerant cycle apparatus which can optimize the capability of releasing heat from a refrigerant in a gas cooler and an auxiliary heat exchanger under use conditions at a low cost. There are provided an intermediate cooling circuit which once releases heat from a refrigerant discharged from a compressor and then returns the refrigerant to the compressor, and a fan which ventilates an inter cooler of the intermediate cooling circuit and a gas cooler. The inter cooler has substantially the same ventilation area as that of the gas cooler.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: January 2, 2007
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Haruhisa Yamasaki, Masaji Yamanaka, Kazuaki Fujiwara, Tsunehisa Yumoto, Shigeya Ishigaki, Kenzo Matsumoto
  • Patent number: 7143593
    Abstract: There is disclosed a refrigerant cycle apparatus capable of avoiding occurrence of an abnormal rise in a pressure on a high-pressure side in advance, comprising: a throttling mechanism including a first capillary tube, and a second capillary tube which is connected in parallel to the first capillary tube and whose flow path resistance is smaller than that of the first capillary tube; and a valve device for controlling refrigerant circulation into the first and second capillary tubes, so that a refrigerant is passed into the second capillary tube at the time of starting of a compressor.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: December 5, 2006
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Haruhisa Yamasaki, Masaji Yamanaka, Kenzo Matsumoto, Shigeya Ishigaki, Kazuaki Fujiwara, Tsunehisa Yumoto
  • Patent number: 7111471
    Abstract: The present invention aims to prevent the occurrence of liquid compression at the second rotary compression element before it happens while improving the compression efficiency with an intermediate cooling circuit in a refrigerant cycle apparatus which comprises an internal high-pressure type multi-stage compression compressor, and the invention is summarized in that the apparatus comprises an intermediate cooling circuit which allows refrigerant discharged from the first rotary compression element of a compressor to dissipate heat, where a microcomputer performs control on the number of revolutions of the compressor to maintain the temperature/pressure of refrigerant so that the refrigerant does not condense at the output of the intermediate cooling circuit, where such a control is done in response to outputs from an outside-air temperature sensor, a refrigerant temperature sensor, and a signal from a controlling apparatus of a refrigerating apparatus body.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: September 26, 2006
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Haruhisa Yamasaki, Shigeya Ishigaki, Masaji Yamanaka, Kazuaki Fujiwara, Tsunehisa Yumoto, Kenzo Matsumoto
  • Publication number: 20040216477
    Abstract: There is disclosed a refrigerant cycle apparatus capable of avoiding occurrence of an abnormal rise in a pressure on a high-pressure side in advance, comprising: a throttling mechanism including a first capillary tube, and a second capillary tube which is connected in parallel to the first capillary tube and whose flow path resistance is smaller than that of the first capillary tube; and a valve device for controlling refrigerant circulation into the first and second capillary tubes, so that a refrigerant is passed into the second capillary tube at the time of starting of a compressor.
    Type: Application
    Filed: February 9, 2004
    Publication date: November 4, 2004
    Inventors: Haruhisa Yamasaki, Masaji Yamanaka, Kenzo Matsumoto, Shigeya Ishigaki, Kazuaki Fujiwara, Tsunehisa Yumoto
  • Publication number: 20040216484
    Abstract: The present invention aims to prevent the occurrence of liquid compression at the second rotary compression element before it happens while improving the compression efficiency with an intermediate cooling circuit in a refrigerant cycle apparatus which comprises an internal high-pressure type multi-stage compression compressor, and the invention is summarized in that the apparatus comprises an intermediate cooling circuit which allows refrigerant discharged from the first rotary compression element of a compressor to dissipate heat, where a microcomputer performs control on the number of revolutions of the compressor to maintain the temperature/pressure of refrigerant so that the refrigerant does not condense at the output of the intermediate cooling circuit, where such a control is done in response to outputs from an outside-air temperature sensor, a refrigerant temperature sensor, and a signal from a controlling apparatus of a refrigerating apparatus body.
    Type: Application
    Filed: February 12, 2004
    Publication date: November 4, 2004
    Inventors: Haruhisa Yamasaki, Shigeya Ishigaki, Masaji Yamanaka, Kazuaki Fujiwara, Tsunehisa Yumoto, Kenzo Matsumoto
  • Publication number: 20040211216
    Abstract: It is an object of the present invention to provide a refrigerant cycle apparatus which can optimize the capability of releasing heat from a refrigerant in a gas cooler and an auxiliary heat exchanger under use conditions at a low cost. There are provided an intermediate cooling circuit which once releases heat from a refrigerant discharged from a compressor and then returns the refrigerant to the compressor, and a fan which ventilates an inter cooler of the intermediate cooling circuit and a gas cooler. The inter cooler has substantially the same ventilation area as that of the gas cooler.
    Type: Application
    Filed: February 13, 2004
    Publication date: October 28, 2004
    Inventors: Haruhisa Yamasaki, Masaji Yamanaka, Kazuaki Fujiwara, Tsunehisa Yumoto, Shigeya Ishigaki, Kenzo Matsumoto