Patents by Inventor Tooru Ikemoto
Tooru Ikemoto 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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Patent number: 10527329Abstract: In an ejector-type refrigeration cycle device provided with a first compression mechanism and a second compression mechanism, a refrigerant outlet of a suction side evaporator is coupled to a refrigerant suction port of the ejector, and a second compression mechanism is provided between the suction side evaporator and the refrigerant suction port of the ejector. Thus, even in an operation condition in which suction capacity of the ejector is decreased in accordance with a decrease of the flow amount of a drive flow of the ejector, the suction capacity of the ejector can be supplemented by the operation of the second compression mechanism. Accordingly, even when a variation in the flow amount of the drive flow is caused, the ejector-type refrigeration cycle device can be stably operated.Type: GrantFiled: April 16, 2009Date of Patent: January 7, 2020Assignee: DENSO CORPORATIONInventors: Hiroshi Oshitani, Kenichi Fujiwara, Haruyuki Nishijima, Etsuhisa Yamada, Tooru Ikemoto, Youhei Nagano
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Patent number: 7870758Abstract: In an ejector cycle with an ejector including a nozzle for decompressing refrigerant, a control unit controls an air blowing amount of an evaporator fan so that a flow speed of refrigerant flowing in an evaporator becomes in a predetermined flow speed range. Therefore, it can prevent a large amount of lubrication oil from staying in the evaporator, and thereby the lubrication oil can sufficiently returns to a compressor. For example, the control unit includes a determining means for determining the predetermined flow speed range based on at least one of an atmosphere temperature of a condenser, a temperature of air supplied to the evaporator and a flow amount of refrigerant discharged from the compressor.Type: GrantFiled: June 29, 2004Date of Patent: January 18, 2011Assignee: Denso CorporationInventors: Haruyuki Nishijima, Hisatsugu Matsunaga, Tooru Ikemoto, Hirotsugu Takeuchi
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Publication number: 20110005268Abstract: In an ejector-type refrigeration cycle device provided with a first compression mechanism and a second compression mechanism, a refrigerant outlet of a suction side evaporator is coupled to a refrigerant suction port of the ejector, and a second compression mechanism is provided between the suction side evaporator and the refrigerant suction port of the ejector. Thus, even in an operation condition in which suction capacity of the ejector is decreased in accordance with a decrease of the flow amount of a drive flow of the ejector, the suction capacity of the ejector can be supplemented by the operation of the second compression mechanism. Accordingly, even when a variation in the flow amount of the drive flow is caused, the ejector-type refrigeration cycle device can be stably operated.Type: ApplicationFiled: April 16, 2009Publication date: January 13, 2011Applicant: DENSO CORPORATIONInventors: Hiroshi Oshitani, Kenichi Fujiwara, Haruyuki Nishijima, Etsuhisa Yamada, Tooru Ikemoto, Youhei Nagano
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Patent number: 6925835Abstract: In an ejector cycle with an ejector including a nozzle for decompressing refrigerant, a refrigerant outlet is provided in an evaporator at a position upper than a refrigerant inlet. Therefore, a circulation performance of refrigerant flowing in the evaporator can be improved. Accordingly, even when a pumping capacity generated in the ejector becomes smaller, a sufficient amount of refrigerant can be drawn into the ejector from the evaporator. Thus, a refrigerant amount supplied to the evaporator can be effectively increased. Further, a control unit controls an amount of cooling air supplied to a condenser based on the temperature of the cooling air, to control a refrigerant state to be introduced to the nozzle. In this case, a pressure increasing amount in the ejector can be effectively increased, and consumption power in the compressor can be effectively increased.Type: GrantFiled: June 16, 2004Date of Patent: August 9, 2005Assignee: Denso CorporationInventors: Haruyuki Nishijima, Hisatsugu Matsunaga, Tooru Ikemoto, Hirotsugu Takeuchi, Takeharu Asaoka
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Patent number: 6918266Abstract: In an ejector, a nozzle is provided within a housing to defining a passage portion around the nozzle, and a suction port is provided in the housing to draw a refrigerant by entrainment of a driving refrigerant jetted from the nozzle. Further, a wall portion is provided in the housing such that the refrigerant drawn from the suction port into the passage portion is prevented from flowing toward an inlet side of the nozzle from a position of the suction port in an axial direction of the nozzle. Therefore, all of the refrigerant flowing from the suction port flows toward an outlet side of the nozzle without flowing toward the inlet side of the nozzle from the position of the suction port in the axial direction. Thus, it can prevent a large pressure loss from being caused in the refrigerant sucked from the suction port, and ejector efficiency can be effectively increased.Type: GrantFiled: April 16, 2004Date of Patent: July 19, 2005Assignee: DENSO CorporationInventors: Makoto Ikegami, Haruyuki Nishijima, Tooru Ikemoto, Yukio Ogawa, Hisatsugu Matsunaga, Takeharu Asaoka, Hirotsugu Takeuchi
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Publication number: 20040261448Abstract: In an ejector cycle with an ejector including a nozzle for decompressing refrigerant, a control unit controls an air blowing amount of an evaporator fan so that a flow speed of refrigerant flowing in an evaporator becomes in a predetermined flow speed range. Therefore, it can prevent a large amount of lubrication oil from staying in the evaporator, and thereby the lubrication oil can sufficiently returns to a compressor. For example, the control unit includes a determining means for determining the predetermined flow speed range based on at least one of an atmosphere temperature of a condenser, a temperature of air supplied to the evaporator and a flow amount of refrigerant discharged from the compressor.Type: ApplicationFiled: June 29, 2004Publication date: December 30, 2004Inventors: Haruyuki Nishijima, Hisatsugu Matsunaga, Tooru Ikemoto, Hirotsugu Takeuchi
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Publication number: 20040255612Abstract: In an ejector cycle with an ejector including a nozzle for decompressing refrigerant, a refrigerant outlet is provided in an evaporator at a position upper than a refrigerant inlet. Therefore, a circulation performance of refrigerant flowing in the evaporator can be improved. Accordingly, even when a pumping capacity generated in the ejector becomes smaller, a sufficient amount of refrigerant can be drawn into the ejector from the evaporator. Thus, a refrigerant amount supplied to the evaporator can be effectively increased. Further, a control unit controls an amount of cooling air supplied to a condenser based on the temperature of the cooling air, to control a refrigerant state to be introduced to the nozzle. In this case, a pressure increasing amount in the ejector can be effectively increased, and consumption power in the compressor can be effectively increased.Type: ApplicationFiled: June 16, 2004Publication date: December 23, 2004Inventors: Haruyuki Nishijima, Hisatsugu Matsunaga, Tooru Ikemoto, Hirotsugu Takeuchi, Takeharu Asaoka
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Publication number: 20040206111Abstract: In an ejector, a nozzle is provided within a housing to defining a passage portion around the nozzle, and a suction port is provided in the housing to draw a refrigerant by entrainment of a driving refrigerant jetted from the nozzle. Further, a wall portion is provided in the housing such that the refrigerant drawn from the suction port into the passage portion is prevented from flowing toward an inlet side of the nozzle from a position of the suction port in an axial direction of the nozzle. Therefore, all of the refrigerant flowing from the suction port flows toward an outlet side of the nozzle without flowing toward the inlet side of the nozzle from the position of the suction port in the axial direction. Thus, it can prevent a large pressure loss from being caused in the refrigerant sucked from the suction port, and ejector efficiency can be effectively increased.Type: ApplicationFiled: April 16, 2004Publication date: October 21, 2004Inventors: Makoto Ikegami, Haruyuki Nishijima, Tooru Ikemoto, Yukio Ogawa, Hisatsugu Matsunaga, Takeharu Asaoka, Hirotsugu Takeuchi