Patents by Inventor Masanori Yanagisawa
Masanori Yanagisawa 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: 8926295Abstract: A compressor includes a closed container and a compression element that are welded together at least three welding points. The closed container has a suction port with a suction tube fitted to the suction port of the closed container with the suction tube being arranged and configured to suck a refrigerant gas, and the suction tube has a central axis that lies in a plane which is orthogonal to the central axis of the closed container and that passes through the suction port. The welding points are arranged such that straight lines connecting all combinations of any two of the welding points are neither parallel to the central axis of the suction tube nor perpendicular to the central axis of the suction tube, to reduce vibrations of the suction tube that occur when vibrations of the motor are transmitted to the closed container.Type: GrantFiled: February 21, 2012Date of Patent: January 6, 2015Assignee: Daikin Industries, Ltd.Inventors: Masanori Yanagisawa, Kouki Morimoto, Takehiro Kanayama
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Patent number: 8430648Abstract: A stagnation space defined by barriers is provided in a first muffler chamber communicating with a first cylinder chamber. The stagnation space overlaps with a refrigerant-gas inlet side of the first cylinder chamber, the inlet side being bordered by a center plane as viewed in a direction of a center axis of the first cylinder chamber. In the first muffler chamber, the high-temperature, high-pressure refrigerant gas is unlikely to enter into the stagnation space, so that heat is less absorbed to the inlet side of the first cylinder chamber.Type: GrantFiled: December 11, 2006Date of Patent: April 30, 2013Assignee: Daikin Industries, Ltd.Inventors: Takehiro Kanayama, Kouki Morimoto, Masanori Yanagisawa
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Publication number: 20120156067Abstract: A compressor includes a closed container and a compression element that are welded together at least three welding points. The closed container has a suction port with a suction tube fitted to the suction port of the closed container with the suction tube being arranged and configured to suck a refrigerant gas, and the suction tube has a central axis that lies in a plane which is orthogonal to the central axis of the closed container and that passes through the suction port. The welding points are arranged such that straight lines connecting all combinations of any two of the welding points are neither parallel to the central axis of the suction tube nor perpendicular to the central axis of the suction tube, to reduce vibrations of the suction tube that occur when vibrations of the motor are transmitted to the closed container.Type: ApplicationFiled: February 21, 2012Publication date: June 21, 2012Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Masanori Yanagisawa, Kouki Morimoto, Takehiro Kanayama
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Patent number: 8147220Abstract: A compressor includes a closed container and a compression element welded together at least three, preferably six, welding points. A suction tube for sucking refrigerant gas is attached to the closed container. A first direction and a second direction that are associated with a natural vibration mode of the suction tube do not coincide with a direction in which any two of the welding points are aligned. Accordingly, vibration of the suction tube can be reduced by arrangement of the welding points even if vibration of a motor is transmitted to the compression element.Type: GrantFiled: December 11, 2006Date of Patent: April 3, 2012Assignee: Daikin Industries, Ltd.Inventors: Masanori Yanagisawa, Kouki Morimoto, Takehiro Kanayama
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Patent number: 7938630Abstract: A compressor includes a compression mechanism, a motor coupled to the compression mechanism via a driving shaft, and a casing to accommodate the compression mechanism and the motor. The motor includes a stator, and a rotor disposed inside the stator and coupled to the driving shaft. The stator is spot-joined to the casing via a plurality of stator spot-joined portions at different positions along a circumferential direction about the driving shaft. Preferably, the stator spot-joined portions are disposed at different axial positions. Also, the stator spot-joined portions are preferably disposed at different circumferential positions from positions of compression mechanism-side spot-joined portions. When an accumulator is connected to the casing via a connection pipe, a straight line between any two of the plurality of stator spot-joined portions preferably crosses a vibration direction of a natural vibration mode of the accumulator.Type: GrantFiled: March 21, 2008Date of Patent: May 10, 2011Assignee: Daikin Industries, Ltd.Inventors: Wakana Koike, Kouki Morimoto, Masanori Yanagisawa, Toshiaki Yoshii
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Publication number: 20110023535Abstract: In a refrigeration apparatus (1) for which refrigerant containing a compound represented by a molecular formula of C3HmFn(note that m=1-5, n=1-5, and m+n=6) is used, a compressor including a first compression mechanism (20A) and a second compression mechanism (20B) inside a casing (11) is used in order to reduce or prevent decomposition of refrigerant due to an increase in discharge temperature of a compressor (10) performing a compression phase of refrigerant in a refrigeration cycle.Type: ApplicationFiled: March 4, 2009Publication date: February 3, 2011Inventors: Kouki Morimoto, Masanori Yanagisawa, Kazuhiro Furusho
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Publication number: 20100226796Abstract: A stagnation space defined by barriers is provided in a first muffler chamber communicating with a first cylinder chamber. The stagnation space overlaps with a refrigerant-gas inlet side of the first cylinder chamber, the inlet side being bordered by a center plane as viewed in a direction of a center axis of the first cylinder chamber. In the first muffler chamber, the high-temperature, high-pressure refrigerant gas is unlikely to enter into the stagnation space, so that heat is less absorbed to the inlet side of the first cylinder chamber.Type: ApplicationFiled: December 11, 2006Publication date: September 9, 2010Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takehiro Kanayama, Kouki Morimoto, Masanori Yanagisawa
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Patent number: 7704060Abstract: A muffler cover of a compression element has discharge outlets or hole portions that discharge a compressed refrigerant gas into a closed vessel from a compression element. A suction pipe provides refrigerant gas, which can be sucked into the compression element in the closed vessel. The suction pipe is attached to the closed vessel. A first direction and a second direction, which correspond to natural vibration modes of the suction pipe, do not coincide with a direction that connects two hole portions. Therefore, even if the refrigerant gas discharged from the compression element resonates in the closed vessel, vibrations of the suction pipe can be reduced.Type: GrantFiled: December 12, 2006Date of Patent: April 27, 2010Assignee: Daikin Industries, Ltd.Inventors: Kouki Morimoto, Masanori Yanagisawa, Takehiro Kanayama
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Publication number: 20100021321Abstract: A compressor includes a compression mechanism, a motor coupled to the compression mechanism via a driving shaft, and a casing to accommodate the compression mechanism and the motor. The motor includes a stator, and a rotor disposed inside the stator and coupled to the driving shaft. The stator is spot-joined to the casing via a plurality of stator spot-joined portions at different positions along a circumferential direction about the driving shaft. Preferably, the stator spot-joined portions are disposed at different axial positions. Also, the stator spot-joined portions are preferably disposed at different circumferential positions from positions of compression mechanism-side spot-joined portions. When an accumulator is connected to the casing via a connection pipe, a straight line between any two of the plurality of stator spot-joined portions preferably crosses a vibration direction of a natural vibration mode of the accumulator.Type: ApplicationFiled: March 21, 2008Publication date: January 28, 2010Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Wakana Koike, Kouki Morimoto, Masanori Yanagisawa, Toshiaki Yoshii
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Publication number: 20090285702Abstract: A discharge port of a compression element is positioned inside an outer circumferential surface of a stator, as seen looking in a direction of a rotation axis of a shaft, and overlaps the stator, as seen looking in a direction orthogonal to the rotation axis of the shaft. Accordingly, refrigerant gas discharged from the compression element can be made to flow mainly into spaces inside the outer circumferential surface of the stator.Type: ApplicationFiled: December 12, 2006Publication date: November 19, 2009Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Kouki Morimoto, Masanori Yanagisawa, Takehiro Kanayama, Yasukazu Nabetani, Azusa Ujihara, Masahide Higuchi, Hideki Mori
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Publication number: 20090232679Abstract: A compressor includes a closed container and a compression element welded together at least three, preferably six, welding points. A suction tube for sucking refrigerant gas is attached to the closed container. A first direction and a second direction that are associated with a natural vibration mode of the suction tube do not coincide with a direction in which any two of the welding points are aligned. Accordingly, vibration of the suction tube can be reduced by arrangement of the welding points even if vibration of a motor is transmitted to the compression element.Type: ApplicationFiled: December 11, 2006Publication date: September 17, 2009Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Masanori Yanagisawa, Kouki Morimoto, Takehiro Kanayama
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Publication number: 20090175740Abstract: A muffler cover of a compression element has discharge outlets or hole portions that discharge a compressed refrigerant gas into a closed vessel from a compression element. A suction pipe provides refrigerant gas, which can be sucked into the compression element in the closed vessel. The suction pipe is attached to the closed vessel. A first direction and a second direction, which correspond to natural vibration modes of the suction pipes, do not coincide with a direction that connects two hole portions. Therefore, even if the refrigerant gas discharged from the compression element resonates in the closed vessel, vibrations of the suction pipe can be reduced.Type: ApplicationFiled: December 12, 2006Publication date: July 9, 2009Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Kouki Morimoto, Masanori Yanagisawa, Takehiro Kanayama
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Patent number: 7322809Abstract: In a rotary compressor to perform oil supplying to bearings through a main oil-supply passage formed in a drive shaft by making use of pressure differential between high-level pressure and low-level pressure in the casing, sealing portions having air-tight structures are formed at both sides in the axis direction of each of the sliding faces constituted between the drive shaft and the bearings, putting bearing-portion oil-supply passages between the sealing portions, to improve the reliability of the bearings by preventing high-pressure gas flowing into a portion between the drive shaft and the bearings.Type: GrantFiled: April 16, 2003Date of Patent: January 29, 2008Assignee: Daikin Industries, Ltd.Inventors: Hiroshi Kitaura, Hiroyuki Yamaji, Masanori Yanagisawa
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Patent number: 7044719Abstract: Disclosed is an enclosed type compressor in which a scroll type compression mechanism and an electric motor are attached firmly to a casing, with the scroll type compression mechanism and the electric motor in contact with an inner face of the casing. Formed in a plane orthogonal to the longitudinal direction of the casing are a contact part of the casing which makes contact with the scroll type compression mechanism (the electric motor) and a non-contact part of the casing which does not make contact with the scroll type compression mechanism (the electric motor). The non-contact part with respect to the scroll type compression mechanism has a peripheral length different from that of the non-contact part with respect to the electric motor.Type: GrantFiled: December 26, 2002Date of Patent: May 16, 2006Assignee: Daikin Industries, LtdInventors: Masanori Yanagisawa, Ryouhei Deguchi, Kazuhiko Matsukawa, Hiroshi Kitaura
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Patent number: 6925832Abstract: Formed in a scroll type compression mechanism is a connection passageway with a discharge opening through which refrigerant compressed by the compression mechanism flows out into a clearance space defined between the compression mechanism and a drive motor. A muffler space in communication with the connection passageway that is configured to reduce operating noise is formed in the compression mechanism. A motor cooling passageway configured to circulate working fluid which has flowed out into the clearance space is formed between the drive motor and an inner surface area of a casing. A guide plate is disposed in the clearance space. Formed in the guide plate is a flow dividing concave portion which causes a part of refrigerant flowing toward the motor cooling passageway to be distributed in a circumferential direction and toward an internal end of a discharge pipe located in the clearance space.Type: GrantFiled: March 11, 2003Date of Patent: August 9, 2005Assignee: Daikin Industries, Ltd.Inventors: Hiroshi Kitaura, Masanori Yanagisawa, Kazuhiko Matsukawa, Toshiyuki Toyama
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Patent number: 6884046Abstract: In a rotating compressor, an outer peripheral surface of a partition member which is secured firmly to a casing so as to divide the inside of the casing into a high-level pressure space and a low-level pressure space, is provided with a peripheral groove for allowing for shrinkage of the casing at a weld area where a trunk part and end plate of the casing are welded together. As a result of such arrangement, the partition member is strongly tightened by making utilization of such shrinkage, thereby not only enhancing sealability between the high-level pressure space and the low-level pressure space in the inside of the casing but also preventing a drop in workability during assembling and an increase in cost.Type: GrantFiled: February 27, 2002Date of Patent: April 26, 2005Assignee: Daiken Industries, Ltd.Inventors: Kazuhiko Matsukawa, Masanori Yanagisawa, Hiroshi Kitaura
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Publication number: 20050002804Abstract: Disclosed is an enclosed type compressor (1) in which a scroll type compression mechanism (2) and an electric motor (3) are attached firmly to a casing (6), with the scroll type compression mechanism (2) and the electric motor (3) in contact with an inner face of the casing (6). Formed in a plane orthogonal to the longitudinal direction of the casing (6) are a contact part (20, 21) of the casing (6) which makes contact with the scroll type compression mechanism (2) (the electric motor (3)) and a non-contact part (30, 31) of the casing (6) which does not make contact with the scroll type compression mechanism (2) (the electric motor (3)). The non-contact part (30) with respect to the scroll type compression mechanism (2) has a peripheral length different from that of the non-contact part (31) with respect to the electric motor (3).Type: ApplicationFiled: December 26, 2002Publication date: January 6, 2005Inventors: Masanori Yanagisawa, Ryouhei Deguchi, Kazuhiko Matsukawa, Hiroshi Kitaura
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Publication number: 20040247474Abstract: In a rotary compressor to perform oil supplying to bearings (32,34,45) through a main oil-supply passage (51) formed in a drive shaft (17) by making use of pressure differential between high-level pressure and low-level pressure in the casing (10), sealing portions (65) having air-tight structure is formed at the both sides in the axis direction of each of sliding faces constituted between the drive shaft (17) and the bearings (32,34,45), putting bearing-portion oil-supply passages (59,60,61) between the sealing portion (65), to improve the reliability of the bearings (32,34,45) by preventing high-pressure gas flowing into a portion between the drive shaft (17) and the bearings (32,34,45).Type: ApplicationFiled: March 18, 2004Publication date: December 9, 2004Inventors: Hiroshi Kitaura, Hiroyuki Yamaji, Masanori Yanagisawa
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Publication number: 20040197209Abstract: Formed in a scroll type compression mechanism is a connection passageway with a discharge opening through which refrigerant compressed by the compression mechanism flows out into a clearance space defined between the compression mechanism and a drive motor. A muffler space in communication with the connection passageway that is configured to reduce operating noise is formed in the compression mechanism. A motor cooling passageway configured to circulate working fluid which has flowed out into the clearance space is formed between the drive motor and an inner surface area of a casing. A guide plate is disposed in the clearance space. Formed in the guide plate is a flow dividing concave portion which causes a part of refrigerant flowing toward the motor cooling passageway to be distributed in a circumferential direction and toward an internal end of a discharge pipe located in the clearance space.Type: ApplicationFiled: February 17, 2004Publication date: October 7, 2004Inventors: Hiroshi Kitaura, Masanori Yanagisawa, Kazuhiko Matsukawa, Toshiyuki Toyama
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Publication number: 20040062670Abstract: In a rotating compressor, an outer peripheral surface (40) of a partition member (23) which is secured firmly to a casing (10) so as to divide the inside of the casing (10) into a high-level pressure space and a low-level pressure space, is provided with a peripheral groove (42) for allowing for shrinkage of the casing (10) at a weld area where a trunk part (11) and end plate (12) of the casing (10) are welded together. As a result of such arrangement, the partition member (23) is strongly tightened by making utilization of such shrinkage, thereby not only enhancing sealability between the high-level pressure space and the low-level pressure space in the inside of the casing (10) but also preventing a drop in workability during assembling and an increase in cost.Type: ApplicationFiled: August 6, 2003Publication date: April 1, 2004Inventors: Kazuhiko Matsukawa, Masanori Yanagisawa, Hiroshi Kitaura