Patents by Inventor Katsuya Kusano
Katsuya Kusano 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: 7340908Abstract: A vapor-compression refrigerant cycle device includes an ejector, a first evaporator for evaporating refrigerant flowing out of a pressure-increasing portion of the ejector, a second evaporator for evaporating refrigerant to be drawn into a refrigerant suction port of the ejector. In the refrigerant cycle device, a refrigerant suction pipe is connected to a refrigerant outlet of the second evaporator and the refrigerant suction port of the ejector, and the surface of the refrigerant suction pipe is covered by an insulating member. Furthermore, the ejector, the first evaporator, the second evaporator and the refrigerant suction pipe are arranged in a passenger compartment of the vehicle.Type: GrantFiled: November 21, 2005Date of Patent: March 11, 2008Assignee: DENSO CorporationInventors: Hiroshi Oshitani, Katsuya Kusano, Hirokazu Imai, Hirotsugu Takeuchi, Mika Saito
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Patent number: 7254961Abstract: A first evaporator is arranged on a downstream side of an ejector, and a second evaporator is connected to a refrigerant suction inlet of the ejector. A refrigerant evaporation temperature of the second evaporator is lower than that of the first evaporator. The first and second evaporators are used to cool a common subject cooling space and are arranged one after the other in a flow direction of air to be cooled.Type: GrantFiled: August 15, 2005Date of Patent: August 14, 2007Assignee: DENSO CorporationInventors: Hiroshi Oshitani, Yasushi Yamanaka, Hirotsugu Takeuchi, Katsuya Kusano, Makoto Ikegami, Yoshiaki Takano, Naohisa Ishizaka, Takayuki Sugiura
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Patent number: 7178359Abstract: A first evaporator evaporates refrigerant, which is outputted from an ejector. A refrigerant outlet of the first evaporator is connected to a suction inlet of a compressor, which is connected to a radiator. A branched passage branches a flow of the refrigerant at a corresponding branching point located between the radiator and the ejector. The branched passage conducts the branched flow of the refrigerant to a suction inlet of the ejector. A flow rate control valve is arranged in the branched passage between a radiator and an ejector on a downstream side of the radiator to depressurize refrigerant outputted from the radiator. A second evaporator is arranged in the first branched passage.Type: GrantFiled: February 9, 2005Date of Patent: February 20, 2007Assignee: Denso CorporationInventors: Hiroshi Oshitani, Yasushi Yamanaka, Hirotsugu Takeuchi, Katsuya Kusano, Makoto Ikegami, Yasukazu Aikawa
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Patent number: 7059150Abstract: A vapor-compression refrigerant cycle system having an ejector includes a first evaporator for evaporating refrigerant from a pressure-increasing portion of the ejector, and a second evaporator for evaporating refrigerant to be drawn into a refrigerant suction port of the ejector. Furthermore, a valve member for opening and closing a refrigerant passage of the second evaporator is arranged in serious with the second evaporator in a refrigerant flow, and refrigerant flowing out of the second evaporator flows into the refrigerant suction port through a refrigerant suction pipe. The system is provided to restrict lubrication oil contained in refrigerant from being introduced from the ejector into and staying in the refrigerant suction pipe when the valve member is closed. For example, the refrigerant suction port is provided at an upper side of the ejector.Type: GrantFiled: September 27, 2005Date of Patent: June 13, 2006Assignee: DENSO CorporationInventors: Hirofumi Komatsu, Suteo Kobayashi, Hiroshi Oshitani, Katsuya Kusano
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Publication number: 20060107672Abstract: A vapor-compression refrigerant cycle device includes an ejector, a first evaporator for evaporating refrigerant flowing out of a pressure-increasing portion of the ejector, a second evaporator for evaporating refrigerant to be drawn into a refrigerant suction port of the ejector. In the refrigerant cycle device, a refrigerant suction pipe is connected to a refrigerant outlet of the second evaporator and the refrigerant suction port of the ejector, and the surface of the refrigerant suction pipe is covered by an insulating member. Furthermore, the ejector, the first evaporator, the second evaporator and the refrigerant suction pipe are arranged in a passenger compartment of the vehicle.Type: ApplicationFiled: November 21, 2005Publication date: May 25, 2006Applicant: DENSO CorporationInventors: Hiroshi Oshitani, Katsuya Kusano, Hirokazu Imai, Hirotsugu Takeuchi, Mika Saito
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Publication number: 20060065011Abstract: A vapor-compression refrigerant cycle system having an ejector includes a first evaporator for evaporating refrigerant from a pressure-increasing portion of the ejector, and a second evaporator for evaporating refrigerant to be drawn into a refrigerant suction port of the ejector. Furthermore, a valve member for opening and closing a refrigerant passage of the second evaporator is arranged in serious with the second evaporator in a refrigerant flow, and refrigerant flowing out of the second evaporator flows into the refrigerant suction port through a refrigerant suction pipe. The system is provided to restrict lubrication oil contained in refrigerant from being introduced from the ejector into and staying in the refrigerant suction pipe when the valve member is closed. For example, the refrigerant suction port is provided at an upper side of the ejector.Type: ApplicationFiled: September 27, 2005Publication date: March 30, 2006Applicant: DENSO CorporationInventors: Hirofumi Komatsu, Suteo Kobayashi, Hiroshi Oshitani, Katsuya Kusano
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Publication number: 20050268644Abstract: A first evaporator is arranged on a downstream side of an ejector, and a second evaporator is connected to a refrigerant suction inlet of the ejector. A refrigerant evaporation temperature of the second evaporator is lower than that of the first evaporator. The first and second evaporators are used to cool a common subject cooling space and are arranged one after the other in a flow direction of air to be cooled.Type: ApplicationFiled: August 15, 2005Publication date: December 8, 2005Applicant: DENSO CorporationInventors: Hiroshi Oshitani, Yasushi Yamanaka, Hirotsugu Takeuchi, Katsuya Kusano, Makoto Ikegami, Yoshiaki Takano, Naohisa Ishizaka, Takayuki Sugiura
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Publication number: 20050178150Abstract: A first evaporator evaporates refrigerant, which is outputted from an ejector. A refrigerant outlet of the first evaporator is connected to a suction inlet of a compressor, which is connected to a radiator. A branched passage branches a flow of the refrigerant at a corresponding branching point located between the radiator and the ejector. The branched passage conducts the branched flow of the refrigerant to a suction inlet of the ejector. A flow rate control valve is arranged in the branched passage between a radiator and an ejector on a downstream side of the radiator to depressurize refrigerant outputted from the radiator. A second evaporator is arranged in the first branched passage.Type: ApplicationFiled: February 9, 2005Publication date: August 18, 2005Inventors: Hiroshi Oshitani, Yasushi Yamanaka, Hirotsugu Takeuchi, Katsuya Kusano, Makoto Ikegami, Yasukazu Aikawa
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Patent number: 6352247Abstract: An electric compressor having a compression unit and an electric motor is mounted to a vehicle through a first support member supporting the compression unit and a second support member supporting the motor. A spring constant of the first support member is smaller than that of the second support member. Therefore, vibration of the compression unit is absorbed by the first support member, and is restricted from being transmitted to the vehicle. On the other hand, vibration of the vehicle is absorbed by the second support member, and is restricted from being transmitted to the compressor. As a result, inlet and outlet pipes connected to the compressor are insulated from a large amount of stress and therefore are not broken due to fatigue at an early stage.Type: GrantFiled: December 15, 1999Date of Patent: March 5, 2002Assignee: Denso CorporationInventors: Hiroshi Ishikawa, Kunio Iritani, Katsuya Kusano, Masaya Tanaka
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Patent number: 6314750Abstract: A heat pump air conditioner has a heat exchanger, a separator for separating refrigerant discharged from the heat exchanger into gas refrigerant and liquid refrigerant, and a compressor. Gas refrigerant in the separator is sucked into the compressor through a gas suction pipe. Oil-dissolved liquid refrigerant in the separator is also sucked through an oil return hole formed at a bottom of the gas suction pipe into the compressor. At the time of starting the air conditioner, when it is judged that a surface of liquid refrigerant in the separator is rapidly lowered to the oil return hole, a rotational speed of the compressor is controlled so that an amount of refrigerant discharged from the compressor is decreased. As a result, the surface of liquid refrigerant is kept higher than the oil return hole, and oil shortage of the compressor is restricted.Type: GrantFiled: May 8, 2000Date of Patent: November 13, 2001Assignee: Denso CorporationInventors: Hiroshi Ishikawa, Katsuya Kusano, Kunio Iritani, Masaya Tanaka, Keita Honda
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Patent number: 5546754Abstract: The device eliminates water droplets from adhering to an evaporator of an automotive air conditioner after the vehicle as been shut off or stopped. In order to park a vehicle, a vehicle driver switches off an ignition switch device, which also switches off an accessory switch, unfastens a seatbelt, and exits the vehicle. Thereupon, after switching off of the accessory switch, when time t elapses, a control circuit sequentially executes a series of steps to recognize the parked state from the three conditions of switching off of a seatbelt switch, a no-rider signal of a rider sensor, and switching off of a door-lock switch. Thereupon, the control circuit announces operation of a blower by means of a notification device, then sets various dampers so as to enable an inner air intake mode, heater core bypass mode, and face mode, and operates the blower at high. Thereupon, water droplets adhering to an evaporator are blown away and removed by means of blown air from this blower.Type: GrantFiled: November 29, 1994Date of Patent: August 20, 1996Assignee: Nippondenso Co., Ltd.Inventors: Tadayoshi Terao, Katsuya Kusano