Patents by Inventor Yoshihiro Sumida

Yoshihiro Sumida 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: 9857113
    Abstract: A computing device calculates a quality of a refrigerant flowing out of a second expansion device on the basis of an inlet liquid enthalpy calculated on the basis of a temperature of the refrigerant flowing into the second expansion device and a saturated gas enthalpy and a saturated liquid enthalpy calculated on the basis of a temperature of the refrigerant flowing out of the second expansion device or a pressure of the refrigerant sucked into a compressor; calculates a liquid-phase concentration and a gas-phase concentration of the refrigerant flowing out of the second expansion device on the basis of the temperature of the refrigerant flowing out of the second expansion device and the pressure of the refrigerant sucked into the compressor; and calculates a composition of the refrigerant circulating in a refrigeration cycle on the basis of the calculated quality, liquid-phase concentration, and gas-phase concentration.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: January 2, 2018
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroyuki Morimoto, Koji Yamashita, Yoshihiro Sumida, Yusuke Shimazu
  • Patent number: 9651287
    Abstract: A computing device calculates a quality of a refrigerant flowing out of an expansion device on the basis of an inlet liquid enthalpy calculated on the basis of a temperature of the refrigerant flowing into the expansion device, and a saturated gas enthalpy and a saturated liquid enthalpy calculated on the basis of a temperature or pressure of the refrigerant flowing out of the expansion device; calculates a liquid-phase concentration and a gas-phase concentration of the refrigerant flowing out of the expansion device on the basis of the temperature and pressure of the refrigerant flowing out of the expansion device; and calculates a composition of the refrigerant circulating in a refrigeration cycle on the basis of the calculated quality, liquid-phase concentration, and gas-phase concentration.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: May 16, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroyuki Morimoto, Koji Yamashita, Yoshihiro Sumida
  • Patent number: 9638443
    Abstract: An air-conditioning apparatus is capable of suppressing refrigerant flow noise regardless the refrigerant state of an inlet of an expansion mechanism. In parallel to a flow control valve, an opening and closing valve that opens and closes a refrigerant passage and an expansion mechanism having porous bodies capable of passing a refrigerant therethrough are connected in series with each other. In a heating mode, in the case where a controller stops an operation of one or more of a plurality of indoor units and causes the other indoor unit(s) to operate, the flow control valve of the stopped indoor unit is fully closed and the opening and closing valve of the stopped indoor unit is opened.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: May 2, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yusuke Shimazu, Yoshihiro Sumida, Koji Azuma
  • Patent number: 8820102
    Abstract: A ventilation and air conditioning apparatus for a vehicle includes: a ventilator that sucks air from outside the vehicle; an air conditioner that conditions air inside the vehicle; a duct for fresh outside air that connects the ventilator with the air conditioner so as to supply the air that the ventilator has sucked from outside the vehicle to the air conditioner; and a duct for conditioned air that supplies the conditioned air blown out from the air conditioner to inside the vehicle. The duct for fresh outside air is branched so as to be connected to the duct for conditioned air. With this configuration, even if the operation of the air conditioner is stopped due to, e.g., a leakage of a flammable refrigerant, an amount of ventilation can be secured in the vehicle.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: September 2, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuhiko Shiraishi, Hirokazu Taniguchi, Yoshihiro Sumida, Akihiro Nishida, Masato Yosomiya, Tetsuya Yamashita, Takashi Okazaki
  • Publication number: 20140130528
    Abstract: A computing device calculates a quality of a refrigerant flowing out of an expansion device on the basis of an inlet liquid enthalpy calculated on the basis of a temperature of the refrigerant flowing into the expansion device, and a saturated gas enthalpy and a saturated liquid enthalpy calculated on the basis of a temperature or pressure of the refrigerant flowing out of the expansion device; calculates a liquid-phase concentration and a gas-phase concentration of the refrigerant flowing out of the expansion device on the basis of the temperature and pressure of the refrigerant flowing out of the expansion device; and calculates a composition of the refrigerant circulating in a refrigeration cycle on the basis of the calculated quality, liquid-phase concentration, and gas-phase concentration.
    Type: Application
    Filed: September 30, 2011
    Publication date: May 15, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroyuki Morimoto, Koji Yamashita, Yoshihiro Sumida
  • Publication number: 20140096551
    Abstract: A computing device calculates a quality of a refrigerant flowing out of a second expansion device on the basis of an inlet liquid enthalpy calculated on the basis of a temperature of the refrigerant flowing into the second expansion device and a saturated gas enthalpy and a saturated liquid enthalpy calculated on the basis of a temperature of the refrigerant flowing out of the second expansion device or a pressure of the refrigerant sucked into a compressor; calculates a liquid-phase concentration and a gas-phase concentration of the refrigerant flowing out of the second expansion device on the basis of the temperature of the refrigerant flowing out of the second expansion device and the pressure of the refrigerant sucked into the compressor; and calculates a composition of the refrigerant circulating in a refrigeration cycle on the basis of the calculated quality, liquid-phase concentration, and gas-phase concentration.
    Type: Application
    Filed: June 16, 2011
    Publication date: April 10, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroyuki Morimoto, Koji Yamashita, Yoshihiro Sumida, Yusuke Shimazu
  • Publication number: 20140083126
    Abstract: An air-conditioning apparatus is capable of suppressing refrigerant flow noise regardless the refrigerant state of an inlet of an expansion mechanism. In parallel to a flow control valve, an opening and closing valve that opens and closes a refrigerant passage and an expansion mechanism having porous bodies capable of passing a refrigerant therethrough are connected in series with each other. In a heating mode, in the case where a controller stops an operation of one or more of a plurality of indoor units and causes the other indoor unit(s) to operate, the flow control valve of the stopped indoor unit is fully closed and the opening and closing valve of the stopped indoor unit is opened.
    Type: Application
    Filed: June 14, 2011
    Publication date: March 27, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yusuke Shimazu, Yoshihiro Sumida, Koji Azuma
  • Patent number: 8443624
    Abstract: Disclosed is a non-azeotropic refrigerant mixture containing tetrafluoropropane as a high-boiling refrigerant and a refrigeration cycle apparatus in which a non-azeotropic refrigerant mixture containing tetrafluoropropane as a high-boiling refrigerant circulates through a refrigeration cycle so as to avoid occurrence of negative pressure in a low-pressure circuit. The non-azeotropic refrigerant mixture is characterized in that a mixing ratio of a high-boiling refrigerant and a low-boiling refrigerant is determined so that a saturated vapor line where pressure is 0.00 MPa is not higher than ?45° C. in a low-pressure circuit formed between the decompressor to the compressor.
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: May 21, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tetsuya Yamashita, Akihiro Nishida, Hirokazu Taniguchi, Takashi Okazaki, Yoshihiro Sumida, Masato Yosomiya, Kazuhiko Shiraishi
  • Publication number: 20110079042
    Abstract: Disclosed is a non-azeotropic refrigerant mixture containing tetrafluoropropane as a high-boiling refrigerant and a refrigeration cycle apparatus in which a non-azeotropic refrigerant mixture containing tetrafluoropropane as a high-boiling refrigerant circulates through a refrigeration cycle so as to avoid occurrence of negative pressure in a low-pressure circuit. The non-azeotropic refrigerant mixture is characterized in that a mixing ratio of a high-boiling refrigerant and a low-boiling refrigerant is determined so that a saturated vapor line where pressure is 0.00 MPa is not higher than ?45° C. in a low-pressure circuit formed between the decompressor to the compressor.
    Type: Application
    Filed: June 12, 2009
    Publication date: April 7, 2011
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tetsuya Yamashita, Akihiro Nishida, Hirokazu Taniguchi, Takashi Okazaki, Yoshihiro Sumida, Masato Yosomiya, Kazuhiko Shiraishi
  • Publication number: 20110067421
    Abstract: A ventilation and air conditioning apparatus for a vehicle includes: a ventilator that sucks air from outside the vehicle; an air conditioner that conditions air inside the vehicle; a duct for fresh outside air that connects the ventilator with the air conditioner so as to supply the air that the ventilator has sucked from outside the vehicle to the air conditioner; and a duct for conditioned air that supplies the conditioned air blown out from the air conditioner to inside the vehicle. The duct for fresh outside air is branched so as to be connected to the duct for conditioned air. With this configuration, even if the operation of the air conditioner is stopped due to, e.g., a leakage of a flammable refrigerant, an amount of ventilation can be secured in the vehicle.
    Type: Application
    Filed: June 11, 2009
    Publication date: March 24, 2011
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazuhiko Shiraishi, Hirokazu Taniguchi, Yoshihiro Sumida, Akihiro Nishida, Masato Yosomiya, Tetsuya Yamashita, Takashi Okazaki
  • Patent number: 7290567
    Abstract: In a refrigerating cycle incorporating a second flow controller having a throttle section, which is composed of an inlet noise eliminating space, an inlet side porous permeable member communicating in a refrigerant flow direction, an orifice, an outlet side foamed metal, and an outlet noise eliminating space, and a multi-directional valve, a gas/liquid two-phase refrigerant is caused to pass through the throttle section.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: November 6, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Satoshi Hirakuni, Yoshihiro Sumida, Hiroaki Makino, Atushi Mochiduki, Shigeki Oonishi, Yoshihiro Tanabe
  • Patent number: 7225630
    Abstract: In a refrigerating cycle incorporating a second flow controller having a throttle section, which is composed of an inlet noise eliminating space 19, an inlet side porous permeable member 20 communicating in a refrigerant flow direction, an orifice 23, an outlet side foamed metal 25, and an outlet noise eliminating space 27, and a multi-directional valve, a gas/liquid two-phase refrigerant is caused to pass through the throttle section.
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: June 5, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Satoshi Hirakuni, Yoshihiro Sumida, Hiroaki Makino, Atushi Mochiduki, Shigeki Onishi, Yoshihiro Tanabe
  • Publication number: 20050061027
    Abstract: In a refrigerating cycle incorporating a second flow controller having a throttle section, which is composed of an inlet noise eliminating space 19, an inlet side porous permeable member 20 communicating in a refrigerant flow direction, an orifice 23, an outlet side foamed metal 25, and an outlet noise eliminating space 27, and a multi-directional valve, a gas/liquid two-phase refrigerant is caused to pass through the throttle section.
    Type: Application
    Filed: August 23, 2004
    Publication date: March 24, 2005
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Satoshi Hirakuni, Yoshihiro Sumida, Hiroaki Makino, Atushi Mochiduki, Shigeki Onishi, Yoshihiro Tanabe
  • Publication number: 20030074914
    Abstract: In a refrigerating cycle incorporating a second flow controller having a throttle section, which is composed of an inlet noise eliminating space 19, an inlet side porous permeable member 20 communicating in a refrigerant flow direction, an orifice 23, an outlet side foamed metal 25, and an outlet noise eliminating space 27, and a multi-directional valve, a gas/liquid two-phase refrigerant is caused to pass through the throttle section.
    Type: Application
    Filed: September 25, 2002
    Publication date: April 24, 2003
    Inventors: Satoshi Hirakanu, Yoshihiro Sumida, Hiroaki Makino, Atushi Mochiduki, Shigeki Oonishi, Yoshihiro Tanabe
  • Patent number: 6510698
    Abstract: A heat source unit and refrigerant used in an existing refrigeration system are replaced with new refrigerant and a new heat source unit which employs the new refrigerant and is equipped with an oil separator and extraneous-matter trapping device. An indoor unit of the existing refrigeration system may be used, in its present form, or replaced with a new indoor unit. Further, connecting pipes used for the existing refrigeration are reused. After replacement of refrigerant, the refrigeration system performs an ordinary operation after having performed a cleaning operation. The extraneous-matter trapping device is provided in a refrigerant pipe close to the heat source unit or in a bypass channel connected to the refrigerant pipe close to the heat source unit. Alternatively, only the heat source unit of the existing refrigeration system is replaced with a new one, and there is employed refrigeration oil which has no mutual solubility with respect to HFC or has very low mutual solubility.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: January 28, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tomohiko Kasai, Mitsunori Kurachi, Hidekazu Tani, Moriya Miyamoto, Yoshihiro Sumida, Takashi Ikeda, Toshihiro Kikukawa, Shohichiroh Masuda, Hirofumi Koge
  • Patent number: 6370889
    Abstract: An air conditioner capable of conducting a natural circulation operation by circulating refrigerant through an evaporator and a condenser located at a higher position than the evaporator, which are connected with pipes, wherein the air conditioner has means for obtaining an air conditioning load quantity to an outdoor air temperature in a temperature range, means for obtaining an air conditioning ability quantity to an outdoor air temperature in a temperature range in a case of using a predetermined mount of refrigerant, means for obtaining the maximum outdoor air temperature capable of conducting air conditioning at the time when an air conditioning load quantity produced from the means for obtaining an air conditioning load quantity substantially coincides with an air conditioning ability quantity from the means for determining an amount of refrigerant, as an amount to be charged, in which a maximum outdoor air temperature capable of conducting air conditioning among the obtained maximum outdoor air tempera
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: April 16, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takashi Okazaki, Akihiro Matsushita, Yoshihiro Sumida
  • Publication number: 20020026800
    Abstract: A heat source unit and refrigerant used in an existing refrigeration system are replaced with new refrigerant and a new heat source unit which employs the new refrigerant and is equipped with an oil separator and extraneous-matter trapping means. An indoor unit of the existing refrigeration system may be used, in its present form, or replaced with a new indoor unit. Further, connecting pipes used for the existing refrigeration are reused. After replacement of refrigerant, the refrigeration system performs an ordinary operation after having performed a cleaning operation. The extraneous-matter trapping means is provided in a refrigerant pipe close to the heat source unit or in a bypass channel connected to the refrigerant pipe close to the heat source unit. Alternatively, only the heat source unit of the existing refrigeration system is replaced with a new one, and there is employed refrigeration oil which has no mutual solubility with respect to HFC or has very low mutual solubility.
    Type: Application
    Filed: May 17, 2000
    Publication date: March 7, 2002
    Inventors: Tomohiko Kasai, Mitsunori Kurachi, Hidekazu Tani, Moriya Miyamoto, Yoshihiro Sumida, Takashi Ikeda, Toshihiro Kikukawa, Shohichiroh Masuda, Hirofumi Koge
  • Patent number: 6247320
    Abstract: In the detection of circulating compositions in the cycle of a non-azeotropic refrigerant composed of three or more kinds of refrigerants, there have been drawbacks in that the number of sensors required is large, and large errors are contained in the circulating composition which can be detected. To overcome these drawbacks, the refrigerating and air-conditioning apparatus comprises at least a compressor, a condenser, a pressure reducing device, and an evaporator, and in a refrigerant cycle which uses as a working refrigerant a non-azeotropic refrigerant composed of N kinds (N≧3) of refrigerants and is provided with composition detecting means for detecting the circulating compositions of the non-azeotropic refrigerant, circulating compositions are determined by using (N−2) relations on compositions among a first component to a j-th (2≦j≦N−1) component of the non-azeotropic refrigerant.
    Type: Grant
    Filed: July 8, 1999
    Date of Patent: June 19, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshihiro Sumida, Takashi Okazaki, Tomohiko Kasai, Osamu Morimoto, Yoshio Ueno
  • Patent number: 6220041
    Abstract: An air conditioner capable of conducting a natural circulation operation by circulating refrigerant through an evaporator and a condenser located at a higher position than the evaporator, which are connected with pipes, wherein the air conditioner has means for obtaining an air conditioning load quantity to an outdoor air temperature in a temperature range, means for obtaining an air conditioning ability quantity to an outdoor air temperature in a temperature range in a case of using a predetermined mount of refrigerant, means for obtaining the maximum outdoor air temperature capable of conducting air conditioning at the time when an air conditioning load quantity produced from the means for obtaining an air conditioning load quantity substantially coincides with an air conditioning ability quantity from the means for determining an amount of refrigerant, as an amount to be charged, in which a maximum outdoor air temperature capable of conducting air conditioning among the obtained maximum outdoor air tempera
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: April 24, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takashi Okazaki, Akihiro Matsushita, Yoshihiro Sumida
  • Publication number: 20010000050
    Abstract: An air conditioner capable of conducting a natural circulation operation by circulating refrigerant through an evaporator and a condenser located at a higher position than the evaporator, which are connected with pipes, wherein the air conditioner has means for obtaining an air conditioning load quantity to an outdoor air temperature in a temperature range, means for obtaining an air conditioning ability quantity to an outdoor air temperature in a temperature range in a case of using a predetermined mount of refrigerant, means for obtaining the maximum outdoor air temperature capable of conducting air conditioning at the time when an air conditioning load quantity produced from the means for obtaining an air conditioning load quantity substantially coincides with an air conditioning ability quantity from the means for determining an amount of refrigerant, as an amount to be charged, in which a maximum outdoor air temperature capable of conducting air conditioning among the obtained maximum outdoor air tempera
    Type: Application
    Filed: November 30, 2000
    Publication date: March 22, 2001
    Inventors: Takashi Okazaki, Akihiro Matsushita, Yoshihiro Sumida