Patents by Inventor Toshiya Nagasawa

Toshiya Nagasawa 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
  • Publication number: 20200096226
    Abstract: A heat exchanger includes a tube, a corrugated fin, and a plurality of grooves. The corrugated fin has a plurality of bent portions and a plurality of fin main bodies disposed between the bent portions. The multiple grooves are arranged at specified intervals from each other and are formed on a surface of the corrugated fin to enhance the hydrophilicity of the surface. The corrugated fin includes a first thick portion in which at least one of the grooves is included and a second thick portion thicker than the first thick portion in a cross-sectional view along an extending direction of the bent portions.
    Type: Application
    Filed: November 26, 2019
    Publication date: March 26, 2020
    Inventors: Keita MORIMOTO, Tomohiko NAKAMURA, Tatsuhiko NISHINO, Toshiya NAGASAWA, Masahiro SHIMOYA, Mitsuyoshi SAITO, Shota CHATANI
  • Publication number: 20200096264
    Abstract: A heat exchanger includes tubes arranged in one direction, and a corrugated fin provided between the tubes. The corrugated fin includes joints joined to the tubes, and fin bodies that connect the joints which are located next to each other along the wave shape. The fin body includes a cut-raised portion that has a shape in which a part of the fin body is cut and raised for promotion of heat transfer. The cut-raised portion includes a cut-raised end on at least one end of the cut-raised portion in the one direction. The cut-raised end has recesses and projections on its surface that increase hydrophilicity of the surface of the cut-raised end.
    Type: Application
    Filed: November 26, 2019
    Publication date: March 26, 2020
    Inventors: Keita MORIMOTO, Tomohiko NAKAMURA, Mitsuyoshi SAITO, Masahiro SHIMOYA, Tatsuhiko NISHINO, Shota CHATANI, Toshiya NAGASAWA
  • Patent number: 10401062
    Abstract: A cold storage heat exchanger includes a plurality of tubes, a coolant flowing in the tubes, a cold storage material container joined to the tubes, the cold storage material container defining a room that houses a cold storage material, and a distribution tank unit that distributes the coolant to the tubes. A coolant passage is formed in the tubes and the distribution tank unit. The distribution tank unit includes an aperture plate that reduces a passage cross-sectional area of the coolant passage. Among the plurality of tubes, the cold storage material container is joined to at least a tube disposed upstream in a coolant flow direction from the aperture plate in the coolant passage. Accordingly, cold storage performance may be improved.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: September 3, 2019
    Assignee: DENSO CORPORATION
    Inventors: Jun Abei, Tomohiko Nakamura, Hirofumi Futamata, Yuusuke Kitou, Toshiya Nagasawa
  • Patent number: 10352599
    Abstract: An evaporator is provided with a refrigerant pipe, a cold storage case which has inner fins mounted therein, and air-side fins. The evaporator is characterized in that the cold storage case is provided with: a filling opening for filling the cold storage case with a cold storage material; a first flow passage connecting to the filling opening and extending in the same direction as the direction of inflow of the cold storage material; and a second flow passage connecting to the first flow passage and extending in the direction intersecting the first flow passage.
    Type: Grant
    Filed: April 1, 2013
    Date of Patent: July 16, 2019
    Assignee: DENSO CORPORATION
    Inventors: Aun Ota, Jun Abei, Eiichi Torigoe, Toshiya Nagasawa
  • 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
  • Patent number: 9989315
    Abstract: A cold storage heat exchanger has refrigerant pipes fins, and cold-storage-medium containers. The cold-storage-medium container is arranged next to the refrigerant pipe. A cold storage medium is accommodated in the cold-storage-medium container in order to leave an air cell, and to provide a filling ratio of less than 90%. The cold-storage-medium container has a plurality of depressions at an inside of the cold-storage-medium container. The depression is a dimple. The plurality of depressions are joined each other at top parts and provide high rigidity. The cold-storage-medium container is positioned on the refrigerant pipe by an engaging projection. An open end of an open depression is covered by the refrigerant pipe. The cold storage medium can flow into the open depression. Therefore, the cold storage medium may directly contact the refrigerant pipe, and is directly cooled with the refrigerant.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: June 5, 2018
    Assignee: DENSO CORPORATION
    Inventors: Yuusuke Kitoh, Toshiya Nagasawa, Eiichi Torigoe, Aun Ota, Jun Abei, Daisuke Haseba
  • Patent number: 9927160
    Abstract: An evaporator includes multiple refrigerant tubes, multiple air passages provided between the refrigerant tubes, a cold storage container disposed in the multiple air passages, and a temperature detector. The evaporator further includes a freezing allowable region and a freezing unallowable region that is provided above the freezing allowable region. The cold storage container has a small thickness region and a large thickness region that is positioned above the small thickness region. The large thickness region demarcates a smaller space with the refrigerant tubes than the space demarcated between the small thickness region and the refrigerant tubes. The small thickness region of the cold storage container is positioned within the freezing allowable region, the large thickness region is positioned in the freezing unallowable region, and the temperature detector is disposed in the freezing allowable region.
    Type: Grant
    Filed: July 22, 2013
    Date of Patent: March 27, 2018
    Assignee: DENSO CORPORATION
    Inventors: Daisuke Haseba, Toshiya Nagasawa, Eiichi Torigoe, Jun Abei
  • Patent number: 9719732
    Abstract: A cold storage heat exchanger has refrigerant pipes and a cold storage material. Each of the refrigerant pipes has a refrigerant passage therein. The refrigerant pipes are arranged so as to be distanced from each other with clearances therebetween. The cold storage material is disposed in at least one of the clearances. At least another one of the clearances provides an air passage. The heat storage material is disposed in at least two of the clearances arranged adjacent to each other.
    Type: Grant
    Filed: August 1, 2013
    Date of Patent: August 1, 2017
    Assignee: DENSO CORPORATION
    Inventors: Aun Ota, Daisuke Haseba, Jun Abei, Yuusuke Kitoh, Eiichi Torigoe, Toshiya Nagasawa
  • Publication number: 20160252281
    Abstract: A cold storage heat exchanger includes a plurality of tubes, a coolant flowing in the tubes, a cold storage material container joined to the tubes, the cold storage material container defining a room that houses a cold storage material, and a distribution tank unit that distributes the coolant to the tubes. A coolant passage is formed in the tubes and the distribution tank unit. The distribution tank unit includes an aperture plate that reduces a passage cross-sectional area of the coolant passage. Among the plurality of tubes, the cold storage material container is joined to at least a tube disposed upstream in a coolant flow direction from the aperture plate in the coolant passage. Accordingly, cold storage performance may be improved.
    Type: Application
    Filed: September 19, 2014
    Publication date: September 1, 2016
    Inventors: Jun ABEI, Tomohiko NAKAMURA, Hirofumi FUTAMATA, Yuusuke KITOU, Toshiya NAGASAWA
  • Publication number: 20150211806
    Abstract: A cold storage heat exchanger has: refrigerant pipes each of which has a refrigerant passage therein, the refrigerant pipes arranged to be distanced from each other with clearances therebetween; and a cold storage material disposed in at least one of the clearances. At least an another one of the clearances provides an air passage. The heat storage material is disposed in at least two of the clearances arranged adjacent to each other. A refrigerant pipe pitch between two of the refrigerant pipes that are adjacent to each other and therebetween have the cold storage material is shorter than a refrigerant pipe pitch between two of the refrigerant pipes that are adjacent to each other and therebetween have the air passage. Thus, a time duration required for a cold storage can be shortened.
    Type: Application
    Filed: August 1, 2013
    Publication date: July 30, 2015
    Inventors: Aun Ota, Daisuke Haseba, Jun Abei, Yuusuke Kitoh, Eiichi Torigoe, Toshiya Nagasawa
  • Publication number: 20150198383
    Abstract: A cold storage heat exchanger has refrigerant pipes fins, and cold-storage-medium containers. The cold-storage-medium container is arranged next to the refrigerant pipe. A cold storage medium is accommodated in the cold-storage-medium container in order to leave an air cell, and to provide a filling ratio of less than 90%. The cold-storage-medium container has a plurality of depressions at an inside of the cold-storage-medium container. The depression is a dimple. The plurality of depressions are joined each other at top parts and provide high rigidity. The cold-storage-medium container is positioned on the refrigerant pipe by an engaging projection. An open end of an open depression is covered by the refrigerant pipe. The cold storage medium can flow into the open depression. Therefore, the cold storage medium may directly contact the refrigerant pipe, and is directly cooled with the refrigerant.
    Type: Application
    Filed: June 20, 2013
    Publication date: July 16, 2015
    Inventors: Yuusuke Kitoh, Toshiya Nagasawa, Eiichi Torigoe, Aun Ota, Jun Abei, Daisuke Haseba
  • Patent number: 9074799
    Abstract: Multiple cooling-storage containers are arranged in respective spaces formed between neighboring refrigerant tubes. The cooling-storage container is made of a pair of outer envelope portions, each forming a side wall. Multiple convex portions and concave portions are formed in the side walls so that air passages are formed between refrigerant tubes and the concave portions. A sectional area of the air passage formed in a lower portion of the cooling-storage container below a predetermined height is made larger than that of the air passage formed in an upper portion of the cooling-storage container above the predetermined height.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: July 7, 2015
    Assignee: DENSO CORPORATION
    Inventors: Jun Abei, Tomohiko Nakamura, Hirofumi Futamata, Toshiya Nagasawa
  • Publication number: 20150184909
    Abstract: An evaporator includes multiple refrigerant tubes, multiple air passages provided between the refrigerant tubes, a cold storage container disposed in the multiple air passages, and a temperature detector. The evaporator further includes a freezing allowable region and a freezing unallowable region that is provided above the freezing allowable region. The cold storage container has a small thickness region and a large thickness region that is positioned above the small thickness region. The large thickness region demarcates a smaller space with the refrigerant tubes than the space demarcated between the small thickness region and the refrigerant tubes. The small thickness region of the cold storage container is positioned within the freezing allowable region, the large thickness region is positioned in the freezing unallowable region, and the temperature detector is disposed in the freezing allowable region.
    Type: Application
    Filed: July 22, 2013
    Publication date: July 2, 2015
    Applicant: DENSO CORPORATION
    Inventors: Daisuke Haseba, Toshiya Nagasawa, Eiichi Torigoe, Jun Abei
  • Publication number: 20150068718
    Abstract: An evaporator is provided with a refrigerant pipe, a cold storage case which has inner fins mounted therein, and air-side fins. The evaporator is characterized in that the cold storage case is provided with: a filling opening for filling the cold storage case with a cold storage material; a first flow passage connecting to the filling opening and extending in the same direction as the direction of inflow of the cold storage material; and a second flow passage connecting to the first flow passage and extending in the direction intersecting the first flow passage.
    Type: Application
    Filed: April 1, 2013
    Publication date: March 12, 2015
    Inventors: Aun Ota, Jun Abei, Eiichi Torigoe, Toshiya Nagasawa
  • Publication number: 20120285668
    Abstract: Multiple cooling-storage containers are arranged in respective spaces formed between neighboring refrigerant tubes. The cooling-storage container is made of a pair of outer envelope portions, each forming a side wall. Multiple convex portions and concave portions are formed in the side walls so that air passages are formed between refrigerant tubes and the concave portions. A sectional area of the air passage formed in a lower portion of the cooling-storage container below a predetermined height is made larger than that of the air passage formed in an upper portion of the cooling-storage container above the predetermined height.
    Type: Application
    Filed: May 2, 2012
    Publication date: November 15, 2012
    Applicant: DENSO CORPORATION
    Inventors: Jun Abei, Tomohiko Nakamura, Hirofumi Futamata, Toshiya Nagasawa
  • Patent number: 6899166
    Abstract: On the surface of a heat exchanging portion in a heat exchanger, a film made of a polyaniline is formed. When the heat exchanger operates, condensed water is adhered on the surface of the heat exchanger, and contacts the film made of the polyaniline. Accordingly, oxygen dissolved in the condensed water becomes active oxygen by the polyaniline, and organic substances contained in the condensed water is decomposed. Thus, an amount of organic substances attached to a surface of the heat exchanger can be reduced in low cost without equipment extension.
    Type: Grant
    Filed: August 29, 2001
    Date of Patent: May 31, 2005
    Assignees: Denso Corporation
    Inventors: Hitoshi Kuno, Yasushi Okamoto, Tomomi Takagi, Kengo Kobayashi, Toshiya Nagasawa, Kenichi Morita
  • Patent number: 6871508
    Abstract: A refrigerant circuit in an air conditioner comprises a compressor that compresses a refrigerant, a condenser that liquefies the refrigerant, a pressure reducing device that reduces the pressure of the compressed refrigerant, and an evaporator that exchanges heat by utilizing the refrigerant and generates an air-conditioning air. The condenser comprises plural fin tubes, through which the refrigerant passes, two headers, to which both ends of the fin tubes are connected and which has a firm structure, upper and lower mounting brackets that are fixed to the headers, and vibration insulating materials that collaborate with pin members and support the condenser via the upper and lower mounting brackets. The valve unit is fixed to the header or to the upper or lower mounting bracket.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: March 29, 2005
    Assignee: Denso Corporation
    Inventors: Shigeki Wanami, Mikiharu Kuwahara, Kazuo Kito, Toshiya Nagasawa
  • Publication number: 20030177775
    Abstract: A refrigerant circuit in an air conditioner comprises a compressor that compresses a refrigerant, a condenser that liquefies the refrigerant, a pressure reducing device that reduces the pressure of the compressed refrigerant, and an evaporator that exchanges heat by utilizing the refrigerant and generates an air-conditioning air. The condenser comprises plural fin tubes, through which the refrigerant passes, two headers, to which both ends of the fin tubes are connected and which has a firm structure, upper and lower mounting brackets that are fixed to the headers, and vibration insulating materials that collaborate with pin members and support the condenser via the upper and lower mounting brackets. The valve unit is fixed to the header or to the upper or lower mounting bracket.
    Type: Application
    Filed: March 24, 2003
    Publication date: September 25, 2003
    Inventors: Shigeki Wanami, Mikiharu Kuwahara, Kazuo Kito, Toshiya Nagasawa
  • Patent number: 6449979
    Abstract: An evaporator has plural tubes arranged in parallel with each other in a width direction perpendicular to an air flowing direction. The tubes are further arranged in two rows in the air flowing direction, and tank portions extending in the width direction are also arranged in the two rows in the air flowing direction to correspond to the tubes. A refrigerant inlet and a refrigerant outlet are provided in the tank portions, respectively, at one side end in the width direction, so that refrigerant flows through all one-row tubes after passing through the other-row tubes. In the evaporator, throttle holes are provided in a distribution portion of the tank portions, for distributing refrigerant, so that a refrigerant distribution within the tubes can be arbitrarily set. Thus, air temperature blown out from the evaporator can be made uniform.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: September 17, 2002
    Assignee: Denso Corporation
    Inventors: Toshiya Nagasawa, Eiichi Torigoe, Masamichi Makihara