Patents by Inventor Shinju WATANABE

Shinju WATANABE 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).

  • Publication number: 20190376727
    Abstract: If the refrigerant amount balance control is executed, since degrees of opening of indoor expansion valves are narrowed in indoor units whose refrigerant superheating degrees are smaller than an average refrigerant superheating degree, amounts of refrigerant flowing into the indoor expansion valves are decreased. On the other hand, in the indoor unit where the refrigerant superheating degree is higher than the average refrigerant superheating degree, since refrigerant pressure on a downstream side of the indoor expansion valve is also decreased due to the degrees of opening of the indoor expansion valves being narrowed, the difference in pressure between the upstream side and the downstream side of the indoor expansion valve increases and an amount of refrigerant flowing into the indoor unit is increased. Accordingly, cooling ability of the indoor unit increases.
    Type: Application
    Filed: February 5, 2018
    Publication date: December 12, 2019
    Applicant: FUJITSU GENERAL LIMITED
    Inventors: Hideya TAMURA, Shinju WATANABE, Shinya ASANO, Takashi KIMURA, Kotaro TOYA, Yoshiki TANAKA, Yuki WATANABE
  • Publication number: 20160084535
    Abstract: An outdoor unit of an air conditioner coupled to an indoor unit by a liquid pipe and a gas pipe, includes: a compressor; an outdoor heat exchanger; a discharge pipe coupled to a refrigerant discharge side of the compressor; an intake pipe coupled to a refrigerant intake side of the compressor; an outdoor-unit high-pressure gas pipe coupled to the discharge pipe; an outdoor-unit low-pressure gas pipe coupled to the intake pipe; an outdoor-unit liquid pipe that couples a first refrigerant entry/exit opening of the outdoor heat exchanger and the liquid pipe together; a bypass pipe coupled to the outdoor-unit liquid pipe; a first flow-passage switcher coupled to a second refrigerant entry/exit opening of the outdoor heat exchanger, the discharge pipe, the intake pipe, and the bypass pipe; and a second flow-passage switcher coupled to the gas pipe, the outdoor-unit high-pressure gas pipe, and the outdoor-unit low-pressure gas pipe.
    Type: Application
    Filed: April 8, 2015
    Publication date: March 24, 2016
    Inventors: Kotaro TOYA, Makoto SHIMOTANI, Hideya TAMURA, Takahiro MATSUNAGA, Shinju WATANABE, Koji OGATA, Masaki ARAI, Yasuhiro OKA, Ken NAKASHIMA, Toshihiro TAKAHASHI, Masakazu SATO
  • Publication number: 20130227978
    Abstract: An air conditioner 1 of the embodiment of the present invention, when all compressors 21a-21c have been stopping for a given time or more, starts an air conditioning operation without performing pressure equalizing control in switch units 6a-6d with starting the operation of the air conditioner 1. Also, when the stopping time of all compressors 21a-21c is less than the given time, the air conditioner 1 performs the pressure equalizing control by controlling switch units 6a-6d with starting the operation of the air conditioner 1. In this case, when the stopping time reaches the given time during execution of the pressure equalizing processing control, the pressure equalizing processing control being executed is stopped and the air conditioning operation is started.
    Type: Application
    Filed: January 3, 2013
    Publication date: September 5, 2013
    Applicant: Fujitsu General Limited
    Inventors: Keito KAWAI, Hideya TAMURA, Takahiro MATSUNAGA, Shinju WATANABE, Takashi KIMURA, Kotaro TOYA, Yasuhiro OKA, Ken NAKASHIMA
  • Publication number: 20130081417
    Abstract: An air conditioning apparatus 1 includes first start control and second start control as its start control. In the first start control, first outdoor heat exchangers 24a, 24b are controlled to function as evaporators and second outdoor heat exchangers 25a, 25b are controlled to function as condensers. Thus, even when the compressors 21a, 21b are driven on at a given rotation number, the discharge pressures thereof can be prevented from increasing, thereby being able to prevent the internal pressures of the compressors 21a, 21b from increasing. Also, after end of the first start control, the first outdoor heat exchangers 24a, 24b and second outdoor heat exchangers 25a, 25b are all controlled to function as evaporators, and the compressors 21a, 21b are driven on at a given rotation number. This can shorten the rising time of the heating capacity in the start of the normal heating operation.
    Type: Application
    Filed: September 13, 2012
    Publication date: April 4, 2013
    Applicant: FUJITSU GENERAL LIMITED
    Inventors: Hideya TAMURA, Takahiro MATSUNAGA, Shinju WATANABE, Keito KAWAI, Takashi KIMURA, Kotaro TOYA, Yasuhiro OKA, Ken NAKASHIMA
  • Publication number: 20130019622
    Abstract: A CPU 110 compares the extracted outside air temperature with a first low pressure saturation temperature. When the outside air temperature is lower than the first low pressure saturation temperature, the CPU 110 switches a first three-way valve 22 and a second three-way valve 23 so that a second outdoor heat exchanger 25 is used as a condenser and that a first outdoor heat exchanger 24 is not used. When the outside air temperature is higher than a second low pressure saturation temperature which is the first low pressure saturation temperature to which a predetermined temperature is added, the CPU 110 switches the first three-way valve 22 and the second three-way valve 23 so that the first outdoor heat exchanger 24 is used as a condenser and that the second outdoor heat exchanger 25 is not used.
    Type: Application
    Filed: July 19, 2012
    Publication date: January 24, 2013
    Applicant: FUJITSU GENERAL LIMITED
    Inventors: Ken NAKASHIMA, Hideya TAMURA, Takahiro MATSUNAGA, Shinju WATANABE, Keito KAWAI, Kotaro TOYA, Yasuhiro OKA