Patents by Inventor Masakazu Nagaya

Masakazu Nagaya 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: 10696128
    Abstract: A cold storage heat exchanger includes: a plurality of refrigerant tubes disposed at intervals, each of the refrigerant tubes including a refrigerant passage that allows a refrigerant to flow therethrough; a cold storage material adjacent to the refrigerant tubes; and a heat transfer suppressor that suppresses heat transfer from the refrigerant tubes to the cold storage material in an overheated area of the refrigerant formed in the refrigerant passage.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: June 30, 2020
    Assignee: DENSO CORPORATION
    Inventors: Jun Abei, Toshiya Nagasawa, Eiichi Torigoe, Naohisa Ishizaka, Norihide Kawachi, Yuusuke Kitou, Ken Nishimura, Masakazu Nagaya
  • Patent number: 10168084
    Abstract: A refrigerant evaporator has an interchange part. The interchange part connects a first collecting part of a second downstream tank part, and a second distribution part of a second upstream tank part. The interchange part connects a second collecting part of a second downstream tank part, and a first distribution part of a second upstream tank part. The interchange part swaps a refrigerant about a width direction of a core. Refrigerant passages relevant to the interchange part are configured to improve refrigerant distribution. Providing a plurality of passages and/or twisting a passage improve distribution.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: January 1, 2019
    Assignee: DENSO CORPORATION
    Inventors: Aun Ota, Naohisa Ishizaka, Norimasa Baba, Shota Chatani, Masakazu Nagaya, Eiichi Torigoe, Kengo Kazari, Daisuke Haseba
  • Publication number: 20180281553
    Abstract: A cold storage heat exchanger includes: a plurality of refrigerant tubes disposed at intervals, each of the refrigerant tubes including a refrigerant passage that allows a refrigerant to flow therethrough; a cold storage material adjacent to the refrigerant tubes; and a heat transfer suppressor that suppresses heat transfer from the refrigerant tubes to the cold storage material in an overheated area of the refrigerant formed in the refrigerant passage.
    Type: Application
    Filed: September 23, 2016
    Publication date: October 4, 2018
    Inventors: Jun ABEI, Toshiya NAGASAWA, Eiichi TORIGOE, Naohisa ISHIZAKA, Norihide KAWACHI, Yuusuke KITOU, Ken NISHIMURA, Masakazu NAGAYA
  • Publication number: 20160084548
    Abstract: A refrigerant evaporator has an interchange part. The interchange part connects a first collecting part of a second downstream tank part, and a second distribution part of a second upstream tank part. The interchange part connects a second collecting part of a second downstream tank part, and a first distribution part of a second upstream tank part. The interchange part swaps a refrigerant about a width direction of a core. Refrigerant passages relevant to the interchange part are configured to improve refrigerant distribution. Providing a plurality of passages and/or twisting a passage improve distribution.
    Type: Application
    Filed: May 9, 2014
    Publication date: March 24, 2016
    Inventors: Aun OTA, Naohisa ISHIZAKA, Norimasa BABA, Shota CHATANI, Masakazu NAGAYA, Eiichi TORIGOE, Kengo KAZARI, Daisuke HASEBA
  • Patent number: 7201220
    Abstract: An air conditioner for automotive vehicles is disclosed. The flow rates of air supplied to an evaporator (4) and a heater (5) are adjusted by rotationally displacing a scroll casing (2b) and thus changing an air flow from a blower (2) to a predetermined direction. The air-mix door can thus be eliminated to allow a smaller size of an air-conditioner casing (3) (air-conditioning unit (1)). Also, the ratio between cool air flow rate and hot air flow rate is adjusted by rotationally displacing the scroll casing (2b) with a spur gear (2c) and, therefore, the size and the production cost of the air conditioner can be reduced as compared with a conventional system in which an air-mix door is swung by a link mechanism.
    Type: Grant
    Filed: April 21, 2004
    Date of Patent: April 10, 2007
    Assignee: DENSO Corporation
    Inventors: Takahiro Tokunaga, Koji Ito, Masakazu Nagaya
  • Patent number: 7159651
    Abstract: An upper opening portion (74, 75) and lower opening portion (76, 77) are arranged in a door body (13b, 14b) located below a side window (13a, 14a), and an air conditioning unit (15, 16) is arranged inside the door body (13b, 14b), and a rotary position of a scroll casing (62, 63) of a blower (56, 57) is selected so that air can flow from the lower opening portion (76, 77) to the upper opening portion (74, 75) at the time of air-cooling and air can flow from the upper opening portion (74, 75) to the lower opening portion (76, 77) at the time of heating.
    Type: Grant
    Filed: September 22, 2004
    Date of Patent: January 9, 2007
    Assignee: Denso Corporation
    Inventors: Koji Ito, Yasushi Yamanaka, Kazushi Shikata, Takahiro Tokunaga, Tomohiro Kamiya, Masakazu Nagaya, Shinichiro Hirai
  • Patent number: 7029391
    Abstract: A blower unit of an air conditioning unit including a scroll casing including a first engaging portion, a fan casing including a first engaging portion, and a controller for controlling an electric motor to move at least one of the scroll casing and the fan casing such that the movement of at least one of the scroll casing and the fan casing stops when the first engaging portion of the scroll casing abuts the first engaging portion of the fan casing. The precision of the position of the scroll casing with respect to the fan casing, the precision of the temperature of air discharged into the compartment, and/or the volume of the blower unit may be improved.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: April 18, 2006
    Assignee: DENSO Corporation
    Inventors: Masakazu Nagaya, Koji Ito, Takahiro Tokunaga
  • Publication number: 20050070220
    Abstract: A blower unit of an air conditioning unit including a scroll casing including a first engaging portion, a fan casing including a first engaging portion, and a controller for controlling an electric motor to move at least one of the scroll casing and the fan casing such that the movement of at least one of the scroll casing and the fan casing stops when the first engaging portion of the scroll casing abuts the first engaging portion of the fan casing. The precision of the position of the scroll casing with respect to the fan casing, the precision of the temperature of air discharged into the compartment, and/or the volume of the blower unit may be improved.
    Type: Application
    Filed: September 15, 2004
    Publication date: March 31, 2005
    Inventors: Masakazu Nagaya, Koji Ito, Takahiro Tokunaga
  • Publication number: 20050067158
    Abstract: An upper opening portion (74, 75) and lower opening portion (76, 77) are arranged in a door body (13b, 14b) located below a side window (13a, 14a), and an air conditioning unit (15, 16) is arranged inside the door body (13b, 14b), and a rotary position of a scroll casing (62, 63) of a blower (56, 57) is selected so that air can flow from the lower opening portion (76, 77) to the upper opening portion (74, 75) at the time of air-cooling and air can flow from the upper opening portion (74, 75) to the lower opening portion (76, 77) at the time of heating.
    Type: Application
    Filed: September 22, 2004
    Publication date: March 31, 2005
    Inventors: Koji Ito, Yasushi Yamanaka, Kazushi Shikata, Takahiro Tokunaga, Tomohiro Kamiya, Masakazu Nagaya, Shinichiro Hirai
  • Publication number: 20040244962
    Abstract: An air conditioner for automotive vehicles is disclosed. The flow rates of air supplied to an evaporator (4) and a heater (5) are adjusted by rotationally displacing a scroll casing (2b) and thus changing an air flow from a blower (2) to a predetermined direction. The air-mix door can thus be eliminated to allow a smaller size of an air-conditioner casing (3) (air-conditioning unit (1)). Also, the ratio between cool air flow rate and hot air flow rate is adjusted by rotationally displacing the scroll casing (2b) with a spur gear (2c) and, therefore, the size and the production cost of the air conditioner can be reduced as compared with a conventional system in which an air-mix door is swung by a link mechanism.
    Type: Application
    Filed: April 21, 2004
    Publication date: December 9, 2004
    Inventors: Takahiro Tokunaga, Koji Ito, Masakazu Nagaya
  • Patent number: 6799432
    Abstract: In a left and right temperature independent control-type air conditioning unit for a vehicle, a case is constructed of a first case and a second case. An air passage in the case is divided into a first air passage through which air flows toward a right region of a compartment and a second air passage through which air flows toward a left region of the compartment by a partition wall. The first and second cases are connected by engaging a first case end surfaces with a second case end surface. Pin contact portions are formed on the first and second cases adjacent to the case end surface. The pin contact portions are disposed to oppose each other between the first case and the second case. The partition wall is fixed by interposing its periphery between the pin contact portions of the first and the second cases.
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: October 5, 2004
    Assignee: Denso Corporation
    Inventors: Masakazu Nagaya, Kazuo Kito
  • Publication number: 20040045309
    Abstract: In a left and right temperature independent control-type air conditioning unit for a vehicle, a case is constructed of a first case and a second case. An air passage in the case is divided into a first air passage through which air flows toward a right region of a compartment and a second air passage through which air flows toward a left region of the compartment by a partition wall. The first and second cases are connected by engaging a first case end surfaces with a second case end surface. Pin contact portions are formed on the first and second cases adjacent to the case end surface. The pin contact portions are disposed to oppose each other between the first case and the second case. The partition wall is fixed by interposing its periphery between the pin contact portions of the first and the second cases.
    Type: Application
    Filed: September 3, 2003
    Publication date: March 11, 2004
    Inventors: Masakazu Nagaya, Kazuo Kito
  • Patent number: 5992506
    Abstract: An air conditioning apparatus for a vehicle has a first side opening portion and a second side opening portion for blowing air toward right and left sides of a passenger compartment. A cool air passage and a warm air passage are provided adjacently to extend in a vehicle width direction, and the first and second side opening portions are arranged to be perpendicular to the vehicle width direction. A three-way branch duct is attached to the air conditioning apparatus in such a manner that air introduced into the first side opening portion is blown toward a right side of the passenger compartment and air introduced into the second side opening portion is blown toward a left side of the passenger compartment. Thus, a temperature difference between air blown from the right side and air blown from the left side of the passenger compartment can be reduced.
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: November 30, 1999
    Assignee: Denso Corporation
    Inventors: Masakazu Nagaya, Koji Takahashi, Masami Taguchi