Patents by Inventor Yasutaka Kuriyama
Yasutaka Kuriyama 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: 20240125499Abstract: A normalization unit acquires a normalized reference value being a value obtained from normalization of a reference value according to a predetermined normalization rule, the reference value being a status value acquired from an air conditioner during a normal estimation period during which the air conditioner is estimated to operate normally, the status value indicating an operational status of the air conditioner. An acquiring unit acquires from the air conditioner, the status value as a diagnosis value during a diagnosis period during which it is not clear whether or not the air conditioner operates normally and which is after the normal estimation period. The normalization unit normalizes the diagnosis value according to the normalization rule.Type: ApplicationFiled: March 24, 2021Publication date: April 18, 2024Inventors: Makoto WADA, Yasutaka OCHIAI, Toshiyuki KURIYAMA, Masanori NAKATA
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Patent number: 11326785Abstract: A heating and hot-water-supply apparatus is provided with: a control unit that performs control on the basis of detection parameters of a plurality of detection means installed at the aforementioned locations and a setting parameter set in an operation unit. The distribution means can adjust the distribution ratio so as to correspond to a heating operation, a hot-water supply operation, and the simultaneous heating and hot-water-supply operation. The control unit prohibits the simultaneous heating and hot-water-supply operation in a case in which the required heating capacity for the hot-water supply operation calculated on the basis of the detection parameters and the setting parameter is equal to or greater than a predetermined standard capacity.Type: GrantFiled: April 24, 2018Date of Patent: May 10, 2022Assignee: NORITZ CORPORATIONInventors: Akihisa Kageyama, Hiroshi Morimoto, Takehito Yokoyama, Yasutaka Kuriyama, Yoshihisa Kitano, Yasushi Morita, Toshihiro Kawachi, Midori Yokoyama
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Patent number: 11029039Abstract: A heating and hot water supplying device includes: a circulation passage that connects a heat exchanger and an external heating terminal; a bypass passage that bypasses the heating terminal by branching from the circulation passage; a hot water supply passage for supplying the hot water heated to a preset hot water supply temperature by the heat exchanger for hot water supply; a control unit that controls operations in which this plurality of units are used; and an operation terminal for performing various operations. A distribution valve is provided in the branching portion of the bypass passage. The distribution valve adjusts the distribution ratio so that each of a heating operation, a hot water supplying operation, and a simultaneous heating and hot water supplying operation is possible. The operation terminal is provided with a prohibit switch to prohibit the simultaneous heating and hot water supplying operation.Type: GrantFiled: October 26, 2017Date of Patent: June 8, 2021Assignee: NORITZ CORPORATIONInventors: Yasushi Morita, Yoshihisa Kitano, Yasutaka Kuriyama, Hiroshi Morimoto, Midori Yokoyama, Haruhiko Tamada
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Patent number: 10989442Abstract: In a heating and hot water supply device including a burning means, a first heat exchanger, a circulation passage for circulating a heating thermal medium, a circulation pump, a first bypass passage, a second heat exchanger for hot water supply, a hot water supply passage, a distribution means at a branching portion of the first bypass passage, and a second bypass passage bypassing the second heat exchanger, a flow rate adjustment means for adjusting a bypass flow rate in the second bypass passage is provided. The distribution means is capable of adjusting its distribution ratio for heating, or hot water supply, or simultaneous heating/hot water supply. All passage connection portions on the second heat exchanger were provided on its one side portion.Type: GrantFiled: May 24, 2017Date of Patent: April 27, 2021Assignee: NORITZ CORPORATIONInventors: Yasutaka Kuriyama, Yasushi Morita, Hiroshi Morimoto, Midori Yokoyama, Yoshihisa Kitano, Haruhiko Tamada
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Publication number: 20210102713Abstract: A heating and hot-water-supply apparatus is provided with: a control unit that performs control on the basis of detection parameters of a plurality of detection means installed at the aforementioned locations and a setting parameter set in an operation unit. The distribution means can adjust the distribution ratio so as to correspond to a heating operation, a hot-water supply operation, and the simultaneous heating and hot-water-supply operation. The control unit prohibits the simultaneous heating and hot-water-supply operation in a case in which the required heating capacity for the hot-water supply operation calculated on the basis of the detection parameters and the setting parameter is equal to or greater than a predetermined standard capacity.Type: ApplicationFiled: April 24, 2018Publication date: April 8, 2021Applicant: NORITZ CORPORATIONInventors: Akihisa KAGEYAMA, Hiroshi MORIMOTO, Takehito YOKOYAMA, Yasutaka KURIYAMA, Yoshihisa KITANO, Yasushi MORITA, Toshihiro KAWACHI, Midori YOKOYAMA
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Patent number: 10890359Abstract: In a heating and hot water supply device including a burning means, a first heat exchanger, a circulation passage for circulating a heating thermal medium, a circulation pump, a first bypass passage, a second heat exchanger for hot water supply, a hot water supply passage, a second bypass passage bypassing the second heat exchanger, a control unit, and an operating terminal, a distribution means is provided at a branching portion of the first bypass passage and is capable of adjusting its distribution ratio for heating, or hot water supply, or simultaneous heating/hot water supply, a display means of the operating terminal is capable of providing displays corresponding to various types of operation.Type: GrantFiled: May 24, 2017Date of Patent: January 12, 2021Assignee: NORITZ CORPORATIONInventors: Yoshihisa Kitano, Yasutaka Kuriyama, Yasushi Morita, Hiroshi Morimoto, Midori Yokoyama
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Publication number: 20190346153Abstract: A heating and hot water supplying device is provided. The device comprising: a circulation passage that connects a heat exchanger and an external heating terminal; a bypass passage that bypasses the heating terminal by branching from the circulation passage; a hot water supply passage for supplying the hot water heated to a preset hot water supply temperature by the heat exchanger for hot water supply; a control unit that controls operations in which this plurality of units are used; and an operation unit for performing various operations. A distribution means is provided in the branching portion of the bypass passage. The distribution means adjusts the distribution ratio so that each of a heating operation, a hot water supplying operation, and a simultaneous heating and hot water supplying operation is possible. The operation unit is provided with a prohibit switch to prohibit the simultaneous heating and hot water supplying operation.Type: ApplicationFiled: October 26, 2017Publication date: November 14, 2019Applicant: NORITZ CORPORATIONInventors: Yasushi MORITA, Yoshihisa KITANO, Yasutaka KURIYAMA, Hiroshi MORIMOTO, Midori YOKOYAMA, Haruhiko TAMADA
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Publication number: 20190234653Abstract: In a heating and hot water supply device comprising a burning means, a first heat exchanger, a circulation passage for circulating a heating thermal medium, a circulation pump, a first bypass passage, a second heat exchanger for hot water supply, a hot water supply passage, a second bypass passage bypassing the second heat exchanger, and a control unit, a distribution means is provided at a first branching portion of the first bypass passage and is capable of adjusting its distribution ratio for heating, or hot water supply, or simultaneous heating/hot water supply, during heating operation, the hot water supply passage is closed by a flow rate adjustment means provided in the hot water supply passage.Type: ApplicationFiled: May 24, 2017Publication date: August 1, 2019Applicant: NORITZ CORPORATIONInventors: Hiroshi MORIMOTO, Yasushi MORITA, Yasutaka KURIYAMA, Midori YOKOYAMA, Yoshihisa KITANO
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Publication number: 20190154304Abstract: In a heating and hot water supply device including a burning means, a first heat exchanger, a circulation passage for circulating a heating thermal medium, a circulation pump, a first bypass passage, a second heat exchanger for hot water supply, a hot water supply passage, a distribution means at a branching portion of the first bypass passage, and a second bypass passage bypassing the second heat exchanger, a flow rate adjustment means for adjusting a bypass flow rate in the second bypass passage is provided. The distribution means is capable of adjusting its distribution ratio for heating, or hot water supply, or simulataneous heating/hot water supply. All passage connection portions on the second heat exchanger were provided on its one side portion.Type: ApplicationFiled: May 24, 2017Publication date: May 23, 2019Applicant: NORITZ CORPORATIONInventors: Yasutaka KURIYAMA, Yasushi MORITA, Hiroshi MORIMOTO, Midori YOKOYAMA, Yoshihisa KITANO, Haruhiko TAMADA
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Publication number: 20190154303Abstract: In a heating and hot water supply device including a burning means, a first heat exchanger, a circulation passage for circulating a heating thermal medium, a circulation pump, a first bypass passage, a second heat exchanger for hot water supply, a hot water supply passage, a second bypass passage bypassing the second heat exchanger, a control unit, and an operating terminal, a distribution means is provided at a branching portion of the first bypass passage and is capable of adjusting its distribution ratio for heating, or hot water supply, or simulataneous heating/hot water supply, a display means of the operating terminal is capable of providing dispalys corresponding to various types of operation.Type: ApplicationFiled: May 24, 2017Publication date: May 23, 2019Applicant: NORITZ CORPORATIONInventors: Yoshihisa KITANO, Yasutaka KURIYAMA, Yasushi MORITA, Hiroshi MORIMOTO, Midori YOKOYAMA
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Patent number: 10072842Abstract: A water heater capable of cooling a fan by inflow of air while suppressing backflow of combustion gas is provided. A fan includes: a fan case having a back surface wall; an impeller having a first blade and a second blade and housed in the fan case; a drive source rotating the impeller; and a rotation shaft coupling the impeller and the drive source through a through hole provided in the back surface wall. A gap through which air outside the fan case is suctioned into the fan case is provided between the rotation shaft and the back surface wall. The second blade faces the back surface wall without another member interposed therebetween throughout a range from an inner circumferential side to an outer circumferential side of the second plane.Type: GrantFiled: February 11, 2015Date of Patent: September 11, 2018Assignee: NORITZ CORPORATIONInventors: Shuji Kameyama, Yasutaka Kuriyama, Norihide Wada, Keigo Fukunishi, Tatsuya Karaki
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Publication number: 20180195739Abstract: A heating device with hot water supply function includes: a combustion means; a first heat exchanger; a circulation passage that connects the first heat exchanger and an room heating unit; a circulation pump; a bypass passage that branches off from the circulation passage; a second heat exchanger for hot water supply provided in the bypass passage; a cold water supply passage; a hot water supply passage for supply of hot water from the second heat exchanger; and a distribution means that is provided at a branching section and whose distribution ratio can be adjusted, so that it becomes possible selectively to execute either only room heating operation, or only hot water supply operation, or simultaneous room heating operation and hot water supply operation; wherein the hot water supply outlet, the thermal medium inlet, and the room heating outlet of the distribution means are at the same height.Type: ApplicationFiled: January 3, 2018Publication date: July 12, 2018Applicant: NORITZ CORPORATIONInventors: Toshihiro KAWACHI, Yasushi MORITA, Midori YOKOYAMA, Hiroshi MORIMOTO, Takehito YOKOYAMA, Yasutaka KURIYAMA, Yoshihisa KITANO, Akihisa KAGEYAMA
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Publication number: 20180149373Abstract: A heating device with hot water supply function includes: a combustion means; a main heat exchanger; a circulation passage connecting the main heat exchanger to an heating apparatus; a circulation pump provided in the circulation passage; a bypass passage that branches off from the circulation passage and bypasses the room heating apparatus; a secondary heat exchanger provided in the bypass passage; a cold water supply passage for supplying cold water to the secondary heat exchanger; a hot water supply passage for supplying hot water heated by the secondary heat exchanger; a hot water supply bypass passage that connects the cold water supply passage to the hot water supply passage bypassing the secondary heat exchanger; a flow adjustment means for adjusting the flow rate in the hot water supply bypass passage and thereby controlling the temperature of hot water to be supplied; and an expanded passage portion of the hot water supply passage whose diameter is increased from an intermediate portion of the hot waType: ApplicationFiled: November 20, 2017Publication date: May 31, 2018Applicant: NORITZ CORPORATIONInventors: Yasushi MORITA, Toshihiro KAWACHI, Yasutaka KURIYAMA, Yoshihisa KITANO, Hiroshi MORIMOTO, Midori YOKOYAMA, Akihisa KAGEYAMA, Takehito YOKOYAMA
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Patent number: 9513030Abstract: A water heater of a latent heat recovery type includes: a combustion apparatus including a burner having a plurality of burner port portions and generating combustion gas from openings at ends of the plurality of burner port portions; a heat exchanger heating water that flows through inside by heat exchange with combustion gas generated in the combustion apparatus; and a fan suctioning the combustion gas that has passed through the heat exchanger and emitting combustion gas to outside of the water heater. The fan includes a fan case, an impeller housed within the fan case, and a drive source connected to the impeller. At least a part of an upper surface of a bottom wall of the fan case is inclined with respect to a reference plane including the openings of the plurality of burner port portions.Type: GrantFiled: December 4, 2014Date of Patent: December 6, 2016Assignee: NORITZ CORPORATIONInventors: Tatsuya Karaki, Yasutaka Kuriyama, Norihide Wada, Shuji Kameyama, Keigo Fukunishi
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Patent number: 9404670Abstract: A fan serves to suction combustion gas which has passed through a secondary heat exchanger and emitting combustion gas to the outside of a water heater. A drainage water discharge pipe is connected to the secondary heat exchanger in order to discharge the drainage water produced as a result of recovery of latent heat in the secondary heat exchanger to the outside of the secondary heat exchanger. An air passage pipe is connected to an exhaust box. A Y-shaped pipe joint has a flow path allowing merging of the drainage water discharge pipe and the air passage pipe, and the flow path after merging leads to the outside of the water heater.Type: GrantFiled: December 4, 2014Date of Patent: August 2, 2016Assignee: NORITZ CORPORATIONInventors: Sakiko Kimura, Takeshi Oohigashi, Yasutaka Kuriyama, Shuji Kameyama
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Patent number: 9228742Abstract: There is provided a flame hole formation member 7 which is inserted and mounted from above in a third plate member 6 used to form a central rich-side flame hole row 33. As the flame hole formation member 7, a pair of flame hole formation parts 71, 71 each used to form a respective lean-side flame hole row 34 are connected by bridge formation parts 72, 72 at their upper end positions, with a predetermined distance held between the flame hole formation parts 71, 71. The bridge formation part 72, 72 is fitted from above into an engagement groove 332 formed in the upper end edge of the third plate member 6, whereby the pair of the flame hole formation parts 71, 71 are assembled so as to sit astride the upper end edge of the third plate member 6.Type: GrantFiled: December 26, 2012Date of Patent: January 5, 2016Assignee: Noritz CorporationInventors: Takashi Akiyama, Takeshi Wakada, Toshio Watanabe, Itsuo Nagai, Yasutaka Kuriyama, Norihide Wada, Ryosuke Umakoshi, Keigo Fukunishi
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Publication number: 20150241086Abstract: A water heater capable of cooling a fan by inflow of air while suppressing backflow of combustion gas is provided. A fan includes: a fan case having a back surface wall; an impeller having a first blade and a second blade and housed in the fan case; a drive source rotating the impeller; and a rotation shaft coupling the impeller and the drive source through a through hole provided in the back surface wall. A gap through which air outside the fan case is suctioned into the fan case is provided between the rotation shaft and the back surface wall. The second blade faces the back surface wall without another member interposed therebeween throughout a range from an inner circumferential side to an outer circumferential side of the second plane.Type: ApplicationFiled: February 11, 2015Publication date: August 27, 2015Applicant: NORITZ CORPORATIONInventors: Shuji KAMEYAMA, Yasutaka KURIYAMA, Norihide WADA, Keigo FUKUNISHI, Tatsuya KARAKI
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Patent number: 9115891Abstract: A row of rich-side flame holes is centrally arranged. Two rows of lean-side flame holes are arranged on both sides of the rich-side flame hole row, respectively. In addition, two rows of rich-side flame holes are arranged on the outsides of the two lean-side flame hole rows, respectively. A lower end part of a central rich-side burner part is projected into a tubular part into which the rich-side mixture is introduced, and communication holes in fluid communication with an inner space are formed in walls on both sides so as to pass completely therethrough in alignment with each other. Each communication hole has a larger diameter than an inner width P and is disposed at a potion situated nearer to the upper of the tubular part and nearer to the front so as to leave, at the rear, a space in which dust p particles are accumulated.Type: GrantFiled: December 16, 2011Date of Patent: August 25, 2015Assignee: NORITZ CORPORATIONInventors: Takashi Akiyama, Norihide Wada, Takeshi Wakada, Yasutaka Kuriyama, Ryosuke Umakoshi, Itsuo Nagai
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Patent number: 9115889Abstract: In a rich-lean combustion burner, each of outer rich-side flame holes disposed on both outer sides is supplied with rich-side mixture in the same amount and mixing state as the others. A lower end part of a central rich-side burner part is projected into an interior of a tubular part to which a rich-side mixture is introduced. First communication holes are opened, respectively, in both side walls of the lower end part. A second and a third communication holes in fluid communication with an outer rich-side burner part are opened in a tubular part. The second and the third communication holes are oriented so as to face each other without any obstruction, other than a space, therebetween. Furthermore, a pocket part which is a space part adapted to collect and accumulate dust particles is formed on the downstream side up to a closed end.Type: GrantFiled: December 7, 2012Date of Patent: August 25, 2015Assignee: NORITZ CORPORATIONInventors: Keigo Fukunishi, Takeshi Wakada, Toshio Watanabe, Takashi Akiyama, Yasutaka Kuriyama, Itsuo Nagai, Norihide Wada, Ryosuke Umakoshi
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Publication number: 20150176862Abstract: A fan serves to suction combustion gas which has passed through a secondary heat exchanger and emitting combustion gas to the outside of a water heater. A drainage water discharge pipe is connected to the secondary heat exchanger in order to discharge the drainage water produced as a result of recovery of latent heat in the secondary heat exchanger to the outside of the secondary heat exchanger. An air passage pipe is connected to an exhaust box. A Y-shaped pipe joint has a flow path allowing merging of the drainage water discharge pipe and the air passage pipe, and the flow path after merging leads to the outside of the water heater.Type: ApplicationFiled: December 4, 2014Publication date: June 25, 2015Applicant: NORITZ CORPORATIONInventors: Sakiko KIMURA, Takeshi OOHIGASHI, Yasutaka KURIYAMA, Shuji KAMEYAMA