Patents by Inventor Kazuaki Shiinoki
Kazuaki Shiinoki 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: 9944880Abstract: In order to prevent deterioration in performance of an oil-free screw compressor and scuffing caused by rust, surfaces of both male and female rotors are coated with heat-resistance coatings containing a solid lubricant. A coating contains Polyimide resin to which Molybdenum disulfide, as a solid lubricant, and Aluminum oxide and Titanium oxide, as additives, are added. Accordingly, it is possible to realize a coating that is higher in heat resistance and longer in lifetime than a conventional one.Type: GrantFiled: July 7, 2014Date of Patent: April 17, 2018Assignees: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD., KAWAMURA RESEARCH LABORATORIES, INC.Inventors: Yukiko Ikeda, Kazuaki Shiinoki, Masakatsu Okaya, Natsuki Kawabata, Masahiro Kawamura, Iwao Aoki
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Patent number: 9145892Abstract: A high reliability water injected scroll air compressor is provided with an orbiting scroll, a fixed scroll corresponding to the orbiting scroll, a motor that generates driving force for making the orbiting scroll orbit the fixed scroll, a compressing path from a suction port to a discharge port, and a portion for injecting water into the compressing path. The operation is controlled by a switching operation in which water is injected into the compressing path and then no water is injected. Corrosion, failure of activation, and concerns about wrap contact when water is injected into an air end are avoided by switching the operation with water injection and the operation without water injection so as to prevent water from remaining in the air end.Type: GrantFiled: January 30, 2014Date of Patent: September 29, 2015Assignee: Hitachi Industrial Equipment Systems, Co., Ltd.Inventors: Natsuki Kawabata, Kazuaki Shiinoki, Hirotaka Kameya, Masakazu Aoki
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Publication number: 20140322058Abstract: In order to prevent deterioration in performance of an oil-free screw compressor and scuffing caused by rust, surfaces of both male and female rotors are coated with heat-resistance coatings containing a solid lubricant. A coating contains Polyimide resin to which Molybdenum disulfide, as a solid lubricant, and Aluminium oxide and Titanium oxide, as additives, are added. Accordingly, it is possible to realize a coating that is higher in heat resistance and longer in lifetime than a conventional one.Type: ApplicationFiled: July 7, 2014Publication date: October 30, 2014Inventors: Yukiko IKEDA, Kazuaki SHIINOKI, Masakatsu OKAYA, Natsuki KAWABATA, Masahiro KAWAMURA, Iwao AOKI
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Patent number: 8801412Abstract: In order to prevent deterioration in performance of an oil-free screw compressor and scuffing caused by rust, surfaces of both male and female rotors are coated with heat-resistance coatings containing a solid lubricant. A coating contains Polyimide resin to which Molybdenum disulfide, as a solid lubricant, and Aluminum oxide and Titanium oxide, as additives, are added. Accordingly, it is possible to realize a coating that is higher in heat resistance and longer in lifetime than a conventional one.Type: GrantFiled: September 29, 2011Date of Patent: August 12, 2014Assignees: Hitachi Industrial Equipment Systems Co., Ltd., Kawamura Research Laboratories, Inc.Inventors: Yukiko Ikeda, Kazuaki Shiinoki, Masakatsu Okaya, Natsuki Kawabata, Masahiro Kawamura, Iwao Aoki
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Publication number: 20140147325Abstract: A high reliability water injected scroll air compressor is provided with an orbiting scroll, a fixed scroll corresponding to the orbiting scroll, a motor that generates driving force for making the orbiting scroll orbit the fixed scroll, a compressing path from a suction port to a discharge port, and a portion for injecting water into the compressing path. The operation is controlled by a switching operation in which water is injected into the compressing path and then no water is injected. Corrosion, failure of activation, and concerns about wrap contact when water is injected into an air end are avoided by switching the operation with water injection and the operation without water injection so as to prevent water from remaining in the air end.Type: ApplicationFiled: January 30, 2014Publication date: May 29, 2014Applicant: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Natsuki KAWABATA, Kazuaki SHIINOKI, Hirotaka KAMEYA, Masakazu AOKI
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Patent number: 8721308Abstract: As pressure in a water tank rapidly rises when water inside a compressor is evaporated by the high temperature of compressed air and this situation makes the operation unstable, an object of the present subject matter is to address this problem. A water injected scroll air compressor is provided with: an air end of the scroll air compressor; a driving unit that generates driving force for the air end; a compressing path from a suction port to a discharge port; a portion to inject water into the compressing path; a discharge piping of air discharged from the air end; a tank provided on a path of the discharge piping for storing water separated from the compressed air; and a cooler that is provided on the path of the discharge piping between the tank and the air end and cools the compressed air discharged from the air end.Type: GrantFiled: February 11, 2011Date of Patent: May 13, 2014Assignee: Hitachi Industrial Equipment Sytems Co., Ltd.Inventors: Kazuaki Shiinoki, Natsuki Kawabata, Hirotaka Kameya
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Patent number: 8672647Abstract: A high reliability water injected scroll air compressor is provided with an orbiting scroll, a fixed scroll corresponding to the orbiting scroll, a motor that generates driving force for making the orbiting scroll orbit the fixed scroll, a compressing path from a suction port to a discharge port, and a portion for injecting water into the compressing path. The operation is controlled by a switching operation in which water is injected into the compressing path and then no water is injected. Corrosion, failure of activation, and concerns about wrap contact when water is injected into an air end are avoided by switching the operation with water injection and the operation without water injection so as to prevent water from remaining in the air end.Type: GrantFiled: February 9, 2011Date of Patent: March 18, 2014Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Natsuki Kawabata, Kazuaki Shiinoki, Hirotaka Kameya, Masakazu Aoki
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Patent number: 8585376Abstract: Disclosed is a water-injection type scroll air compressor whose pre-stopping operation time for drying can be reduced while enhancing compressor efficiency. The compressor body 1 includes a water supply line 24 for supplying water to a water feeder 23 connected to an air suction line 2. The water supply line 24 is provided with a control valve 27 that can control a flow rate of the water. A controller 28 conducts driving control of the control valve 27 in a 5×10?5 to 40×10?5 range of an injected-water volume ratio (more specifically, a volume ratio between an intake air flow rate and injected-water flow rate in the water feeder 23 of the suction line 2) and at the same time, in an injected-water volume ratio range of the compressor characterized so that an increase rate of overall adiabatic efficiency of the compressor per 1×10?5 increase rate of the injected-water volume ratio stays less than 2% of an original or initial value.Type: GrantFiled: August 18, 2010Date of Patent: November 19, 2013Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Hirotaka Kameya, Kazuaki Shiinoki, Natsuki Kawabata, Hirokatsu Kohsokabe
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Patent number: 8202057Abstract: An oil-free scroll compressor prevents wraps from being broken and provides improved reliability. The oil-free scroll compressor includes an orbiting scroll member and fixed scroll members, and has compression channels into which water is injected each formed between the intake port and exhaust port provided in the fixed scroll member. The oil-free scroll compressor includes temperature sensors each of which detects temperature in the compression channel, regulating valves each of which controls ratio of the amount of the water to be injected into the respective compression channels to the total amount of the water to be injected into the compression channels, and controller which controls the opening degrees of the regulating valves such that a difference between the detected temperatures from the compression channels is small.Type: GrantFiled: August 18, 2009Date of Patent: June 19, 2012Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Hirokatsu Kohsokabe, Hirotaka Kameya, Kazuaki Shiinoki, Toshiaki Yabe
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Publication number: 20120100029Abstract: In order to prevent deterioration in performance of an oil-free screw compressor and scuffing caused by rust, surfaces of both male and female rotors are coated with heat-resistance coatings containing a solid lubricant. A coating contains Polyimide resin to which Molybdenum disulfide, as a solid lubricant, and Aluminium oxide and Titanium oxide, as additives, are added. Accordingly, it is possible to realize a coating that is higher in heat resistance and longer in lifetime than a conventional one.Type: ApplicationFiled: September 29, 2011Publication date: April 26, 2012Inventors: Yukiko IKEDA, Kazuaki Shiinoki, Masakatsu Okaya, Natsuki Kawabata, Masahiro Kawamura, Iwao Aoki
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Publication number: 20110274574Abstract: As pressure in a water tank rapidly rises when water inside a compressor is evaporated by the high temperature of compressed air and this situation makes the operation unstable, an object of the present subject matter is to address this problem. A water injected scroll air compressor is provided with: an air end of the scroll air compressor; a driving unit that generates driving force for the air end; a compressing path from a suction port to a discharge port; a portion to inject water into the compressing path; a discharge piping of air discharged from the air end; a tank provided on a path of the discharge piping for storing water separated from the compressed air; and a cooler that is provided on the path of the discharge piping between the tank and the air end and cools the compressed air discharged from the air end.Type: ApplicationFiled: February 11, 2011Publication date: November 10, 2011Applicant: Hitachi Industrial Equipment Systems Co., LTD.Inventors: Kazuaki SHIINOKI, Natsuki Kawabata, Hirotaka Kameya
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Publication number: 20110194963Abstract: A high reliability water injected scroll air compressor is provided. In the scroll air compressor provided with: an orbiting scroll; a fixed scroll corresponding the orbiting scroll; a motor that generates driving force for making the orbiting scroll orbit the fixed scroll; a compressing path from a suction port to a discharge port; and a portion for injecting water into the compressing path, the operation is controlled by switching operation in which water is injected into the compressing path and operation in which no water is injected. Corrosion, the failure of activation and a touch to the wrap respectively worried when water is injected into an air end are avoided by switching the operation with water injection and the operation without water injection as described above so as to prevent water from remaining in the air end.Type: ApplicationFiled: February 9, 2011Publication date: August 11, 2011Applicant: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Natsuki KAWABATA, Kazuaki SHIINOKI, Hirotaka KAMEYA, Masakazu AOKI
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Publication number: 20110129362Abstract: Disclosed is a water-injection type scroll air compressor whose pre-stopping operation time for drying can be reduced while enhancing compressor efficiency. The compressor body 1 includes a water supply line 24 for supplying water to a water feeder 23 connected to an air suction line 2. The water supply line 24 is provided with a control valve 27 that can control a flow rate of the water. A controller 28 conducts driving control of the control valve 27 in a 5×10?5 to 40×10?5 range of an injected-water volume ratio (more specifically, a volume ratio between an intake air flow rate and injected-water flow rate in the water feeder 23 of the suction line 2) and at the same time, in an injected-water volume ratio range of the compressor characterized so that an increase rate of overall adiabatic efficiency of the compressor per 1×10?5 increase rate of the injected-water volume ratio stays less than 2% of an original or initial value.Type: ApplicationFiled: August 18, 2010Publication date: June 2, 2011Inventors: Hirotaka KAMEYA, Kazuaki Shiinoki, Natsuki Kawabata, Hirokatsu Kohsokabe
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Patent number: 7845463Abstract: A conventional machine package faces problems concerned with costs, weight, etc. and also a problem of antinomy that an attempt to enhance the noise reducing performance increases the airflow resistance and then deteriorates the cooling performance. Providing a sound absorbing structure with the heat radiation performance ensured within a practical range and then with considerably improved noise reducing effect achieves a low-noise machine package with a downsized casing and a reduced cooling fan power.Type: GrantFiled: January 31, 2008Date of Patent: December 7, 2010Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Toshiaki Yabe, Kazuaki Shiinoki, Kazuyoshi Iida, Koji Ikeda
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Publication number: 20080179135Abstract: A conventional machine package faces problems concerned with costs, weight, etc. and also a problem of antinomy that an attempt to enhance the noise reducing performance increases the airflow resistance and then deteriorates the cooling performance. Providing a sound absorbing structure with the heat radiation performance ensured within a practical range and then with considerably improved noise reducing effect achieves a low-noise machine package with a downsized casing and a reduced cooling fan power.Type: ApplicationFiled: January 31, 2008Publication date: July 31, 2008Inventors: Toshiaki YABE, Kazuaki Shiinoki, Kazuyoshi Iida, Koji Ikeda
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Patent number: 6450791Abstract: In a double toothed type scroll compressor, spiral wraps are formed on both sides of an end plate of an orbiting scroll, and wraps adapted to engage with the spiral wraps are formed on a stationary scroll. A dust wrap is formed on a side diametrically outside of the wrap of the stationary scroll. Grooves are formed on ends of the respective wraps to receive therein seal members formed of a high polymer material. Electric charge of static electricity produced when the seal members slide on surfaces of the mating end plate is made to flow from a bolt provided on an end of a crankshaft to the stationary scroll through a brush, thereby preventing accumulation of electric charge in a crankshaft.Type: GrantFiled: July 20, 2001Date of Patent: September 17, 2002Assignee: Hitachi, Ltd.Inventors: Natsuki Kawabata, Kazuaki Shiinoki, Masakazu Aoki, Shigeru Machida, Toshiaki Yabe
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Publication number: 20020028150Abstract: In a double toothed type scroll compressor, spiral wraps are formed on both sides of an end plate of an orbiting scroll, and wraps adapted to engage with the spiral wraps are formed on a stationary scroll. A dust wrap is formed on a side diametrically outside of the wrap of the stationary scroll. Grooves are formed on ends of the respective wraps to receive therein seal members formed of a high polymer material. Electric charge of static electricity produced when the seal members slide on surfaces of the mating end plate is made to flow from a bolt provided on an end of a crankshaft to the stationary scroll through a brush, thereby preventing accumulation of electric charge in a crankshaft.Type: ApplicationFiled: July 20, 2001Publication date: March 7, 2002Inventors: Natsuki Kawabata, Kazuaki Shiinoki, Masakazu Aoki, Shigeru Machida, Toshiaki Yabe
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Patent number: 6283738Abstract: It is an improvement of a package-type compressor that is used for the air compression, refrigerating and air conditioning The compressor is a double scroll compressor that a laps are formed on both sides of an end plate of orbiting scroll. A scroll compressor element is disposed above a motor and a dryer is disposed further above the scroll compressor element. A cooling fan is installed in the motor. A cooler that cools operation gas through the compressor element is disposed above the cooling fan. A partition plate defines a first flow passage for cooling the motor and the compressor element and a second flow passage for cooling the cooler. A first suction port sucking external air to the first and second flow passages is provided on a casing side wall locating in a direction extending from the motor shaft. A suction partitioning plate is attached to a casing sidewall opposite to the casing side wall having the first suction port. The second suction port is lower than the first suction port.Type: GrantFiled: September 26, 2000Date of Patent: September 4, 2001Assignee: Hitachi, Ltd.Inventors: Kazuaki Shiinoki, Akira Suzuki, Isamu Kawano, Natsuki Kawabata
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Patent number: 6210132Abstract: A cooling fan is fitted to one of the shaft end portions of a double-end motor, and a pulley is fitted to the other end portion. A belt is passed around this pulley and a pulley fitted to a compressor element, and the compressor element is driven by this belt. The compressor element is disposed in such a manner as to be stacked up in an upward direction of the motor. An exhaust duct having a built-in cooler is also disposed in such a manner as to be stacked up above a cooling fan on the discharge side of the cooling fan. A main duct is formed on the suction side of the cooling fan and is interconnected in series with a cooling air outlet of the compressor element. These members described above are accommodated inside a casing. Therefore, two cooling air flow passages are defined on the right and left sides inside the casing.Type: GrantFiled: September 2, 1997Date of Patent: April 3, 2001Assignee: Hitachi, Ltd.Inventors: Kazuaki Shiinoki, Isamu Kawano, Natsuki Kawabata, Akira Suzuki
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Patent number: 6193486Abstract: It is an improvement of a package-type compressor that is used for the air compression, refrigerating and air conditioning. The compressor is a double scroll compressor that a laps are formed on both sides of an end plate of orbiting scroll. A scroll compressor element is disposed above a motor and a dryer is disposed further above the scroll compressor element. A cooling fan is installed in the motor. A cooler that cools operation gas through the compressor element is disposed above the cooling fan. A partition plate defines a first flow passage for cooling the motor and the compressor element and a second flow passage for cooling the cooler. A first suction port sucking external air to the first and second flow passages is provided on a casing side wall locating in a direction extending from the motor shaft. A suction partitioning plate is attached to a casing side wall opposite to the casing side wall having the first suction port. The second suction port is lower than the first suction port.Type: GrantFiled: March 19, 1999Date of Patent: February 27, 2001Assignee: Hitachi, Ltd.Inventors: Kazuaki Shiinoki, Akira Suzuki, Isamu Kawano, Natsuki Kawabata