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).
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Publication number: 20230003467Abstract: 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: ApplicationFiled: September 13, 2022Publication date: January 5, 2023Inventors: Keita MORIMOTO, Tomohiko NAKAMURA, Mitsuyoshi SAITO, Tatsuhiko NISHINO, Shota CHATANI, Toshiya NAGASAWA
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Patent number: 11187432Abstract: 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: GrantFiled: November 26, 2019Date of Patent: November 30, 2021Assignee: DENSO CORPORATIONInventors: Keita Morimoto, Tomohiko Nakamura, Tatsuhiko Nishino, Toshiya Nagasawa, Masahiro Shimoya, Mitsuyoshi Saito, Shota Chatani
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Patent number: 10696128Abstract: 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: GrantFiled: September 23, 2016Date of Patent: June 30, 2020Assignee: DENSO CORPORATIONInventors: Jun Abei, Toshiya Nagasawa, Eiichi Torigoe, Naohisa Ishizaka, Norihide Kawachi, Yuusuke Kitou, Ken Nishimura, Masakazu Nagaya
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Publication number: 20200096226Abstract: 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: ApplicationFiled: November 26, 2019Publication date: March 26, 2020Inventors: Keita MORIMOTO, Tomohiko NAKAMURA, Tatsuhiko NISHINO, Toshiya NAGASAWA, Masahiro SHIMOYA, Mitsuyoshi SAITO, Shota CHATANI
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Publication number: 20200096264Abstract: 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: ApplicationFiled: November 26, 2019Publication date: March 26, 2020Inventors: Keita MORIMOTO, Tomohiko NAKAMURA, Mitsuyoshi SAITO, Masahiro SHIMOYA, Tatsuhiko NISHINO, Shota CHATANI, Toshiya NAGASAWA
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Patent number: 10401062Abstract: 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: GrantFiled: September 19, 2014Date of Patent: September 3, 2019Assignee: DENSO CORPORATIONInventors: Jun Abei, Tomohiko Nakamura, Hirofumi Futamata, Yuusuke Kitou, Toshiya Nagasawa
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Patent number: 10352599Abstract: 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: GrantFiled: April 1, 2013Date of Patent: July 16, 2019Assignee: DENSO CORPORATIONInventors: Aun Ota, Jun Abei, Eiichi Torigoe, Toshiya Nagasawa
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Publication number: 20180281553Abstract: 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: ApplicationFiled: September 23, 2016Publication date: October 4, 2018Inventors: Jun ABEI, Toshiya NAGASAWA, Eiichi TORIGOE, Naohisa ISHIZAKA, Norihide KAWACHI, Yuusuke KITOU, Ken NISHIMURA, Masakazu NAGAYA
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Patent number: 9989315Abstract: 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: GrantFiled: June 20, 2013Date of Patent: June 5, 2018Assignee: DENSO CORPORATIONInventors: Yuusuke Kitoh, Toshiya Nagasawa, Eiichi Torigoe, Aun Ota, Jun Abei, Daisuke Haseba
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Patent number: 9927160Abstract: 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: GrantFiled: July 22, 2013Date of Patent: March 27, 2018Assignee: DENSO CORPORATIONInventors: Daisuke Haseba, Toshiya Nagasawa, Eiichi Torigoe, Jun Abei
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Patent number: 9719732Abstract: 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: GrantFiled: August 1, 2013Date of Patent: August 1, 2017Assignee: DENSO CORPORATIONInventors: Aun Ota, Daisuke Haseba, Jun Abei, Yuusuke Kitoh, Eiichi Torigoe, Toshiya Nagasawa
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Publication number: 20160252281Abstract: 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: ApplicationFiled: September 19, 2014Publication date: September 1, 2016Inventors: Jun ABEI, Tomohiko NAKAMURA, Hirofumi FUTAMATA, Yuusuke KITOU, Toshiya NAGASAWA
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Publication number: 20150211806Abstract: 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: ApplicationFiled: August 1, 2013Publication date: July 30, 2015Inventors: Aun Ota, Daisuke Haseba, Jun Abei, Yuusuke Kitoh, Eiichi Torigoe, Toshiya Nagasawa
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Publication number: 20150198383Abstract: 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: ApplicationFiled: June 20, 2013Publication date: July 16, 2015Inventors: Yuusuke Kitoh, Toshiya Nagasawa, Eiichi Torigoe, Aun Ota, Jun Abei, Daisuke Haseba
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Patent number: 9074799Abstract: 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: GrantFiled: May 2, 2012Date of Patent: July 7, 2015Assignee: DENSO CORPORATIONInventors: Jun Abei, Tomohiko Nakamura, Hirofumi Futamata, Toshiya Nagasawa
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Publication number: 20150184909Abstract: 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: ApplicationFiled: July 22, 2013Publication date: July 2, 2015Applicant: DENSO CORPORATIONInventors: Daisuke Haseba, Toshiya Nagasawa, Eiichi Torigoe, Jun Abei
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Publication number: 20150068718Abstract: 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: ApplicationFiled: April 1, 2013Publication date: March 12, 2015Inventors: Aun Ota, Jun Abei, Eiichi Torigoe, Toshiya Nagasawa
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Publication number: 20120285668Abstract: 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: ApplicationFiled: May 2, 2012Publication date: November 15, 2012Applicant: DENSO CORPORATIONInventors: Jun Abei, Tomohiko Nakamura, Hirofumi Futamata, Toshiya Nagasawa
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Patent number: 6899166Abstract: 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: GrantFiled: August 29, 2001Date of Patent: May 31, 2005Assignees: Denso CorporationInventors: Hitoshi Kuno, Yasushi Okamoto, Tomomi Takagi, Kengo Kobayashi, Toshiya Nagasawa, Kenichi Morita
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Patent number: 6871508Abstract: 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: GrantFiled: March 24, 2003Date of Patent: March 29, 2005Assignee: Denso CorporationInventors: Shigeki Wanami, Mikiharu Kuwahara, Kazuo Kito, Toshiya Nagasawa