Patents by Inventor Masahide Higuchi
Masahide Higuchi 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: 11661939Abstract: A rotary compressor includes a casing including an oil reservoir configured to store lubricating oil inside, and a compression mechanism including a reciprocator and a support. The reciprocator defines a compression chamber and reciprocating along a first direction. The support has a support surface configured to support the reciprocator. The support surface includes a first groove and a second groove formed therein. The first groove extends along a second direction intersecting with the first direction and is configured to transfer the lubricating oil to the second groove. The second groove extends from a center of the first groove toward the compression chamber along the first direction.Type: GrantFiled: March 10, 2022Date of Patent: May 30, 2023Assignee: Daikin Industries, Ltd.Inventors: Yudai Iwai, Takuya Ishino, Masahide Higuchi
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Publication number: 20230036994Abstract: A compressor control method of controlling the vibration amplitude of a compressor equipped with a motor by using the motor is provided. The compressor is driven by the motor, and this method includes controlling, in a specific operating area, the vibration amplitude of the compressor such that the vibration amplitude is substantially constant regardless of changes in the load imposed on the motor and in the number of revolutions of the motor per unit time.Type: ApplicationFiled: December 25, 2020Publication date: February 2, 2023Inventors: Minoru KITOU, Hitoshi OZAWA, Masahide HIGUCHI
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Publication number: 20220299029Abstract: A rotary compressor includes a casing including an oil reservoir configured to store lubricating oil inside, and a compression mechanism including a reciprocator and a support. The reciprocator defines a compression chamber and reciprocating along a first direction. The support has a support surface configured to support the reciprocator. The support surface includes a first groove and a second groove formed therein, The first groove extends along a second direction intersecting with the first direction and is configured to transfer the lubricating oil to the second groove, The second groove extends from a center of the first groove toward the compression chamber along the first direction.Type: ApplicationFiled: March 10, 2022Publication date: September 22, 2022Inventors: Yudai IWAI, Takuya ISHINO, Masahide HIGUCHI
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Publication number: 20180291903Abstract: A compressor includes a rotating shaft including an eccentric portion, a motor including a rotor connected to the rotating shaft, a compression mechanism portion driven by the motor via the rotating shaft, a first balance weight provided at one end along an axial direction of the rotor on a side facing the compression mechanism portion, and a second balance weight provided at an other end along the axial direction of the rotor. The first and second balance weights are disposed such that at least either of a center of gravity of the first balance weight or a center of gravity of the second balance weight is positioned at a preset lead angle in a rotation direction of the rotor with respect to a reference plane passing through a rotation center along an eccentric direction of the eccentric portion of the rotating shaft.Type: ApplicationFiled: October 3, 2016Publication date: October 11, 2018Inventor: Masahide HIGUCHI
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Patent number: 9702363Abstract: A compressor includes a cylinder, a shaft including a main shaft and an eccentric part, a roller part having an inner circumferential surface fitted on an outer circumferential surface of the eccentric part so as to make an orbital motion, a blade part along with the roller part partitioning inside of the cylinder chamber into low and high pressure chambers, and sliding bearing parts fixed to the cylinder and including cylindrical surfaces supporting the main shaft. A relation (?Ds??Dr)/2<? is satisfied. ?Ds is an inside diameter of the inner circumferential surface of the cylinder chamber, ?Dr is an outside diameter of the outer circumferential surface of the roller part, and ? is an eccentricity of a central axis of the eccentric part relative to a central axis of the main shaft. Central axes of the cylindrical surfaces are eccentric relative to a central axis of the inner circumferential surface.Type: GrantFiled: December 3, 2014Date of Patent: July 11, 2017Assignee: Daikin Industries, Ltd.Inventor: Masahide Higuchi
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Publication number: 20160356272Abstract: A compressor includes a cylinder, a shaft including a main shaft and an eccentric part, a roller part having an inner circumferential surface fitted on an outer circumferential surface of the eccentric part so as to make an orbital motion, a blade part along with the roller part partitioning inside of the cylinder chamber into low and high pressure chambers, and sliding bearing parts fixed to the cylinder and including cylindrical surfaces supporting the main shaft. A relation (?Ds??Dr)/2<? is satisfied. ?Ds is an inside diameter of the inner circumferential surface of the cylinder chamber, ?Dr is an outside diameter of the outer circumferential surface of the roller part, and ? is an eccentricity of a central axis of the eccentric part relative to a central axis of the main shaft. Central axes of the cylindrical surfaces are eccentric relative to a central axis of the inner circumferential surface.Type: ApplicationFiled: December 3, 2014Publication date: December 8, 2016Inventor: Masahide HIGUCHI
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Patent number: 9243634Abstract: A compressor includes sliding members arranged to slide relative to each other when compressing a refrigerant. At least one of the sliding members has a resin layer that is formed on the whole area or a portion of at least one sliding surface. The resin layer has an arithmetic mean surface roughness (Ra) of 0.3 or more, or the whole area or a portion of an area opposed to the resin layer is entirely or partially harder than the resin layer and has an arithmetic mean surface roughness (Ra) of 0.3 or more.Type: GrantFiled: December 19, 2011Date of Patent: January 26, 2016Assignee: Daikin Industries, Ltd.Inventors: Takeo Hayashi, Yuuichi Yamamoto, Masahide Higuchi, Chihiro Endou
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Patent number: 9243635Abstract: A compressor includes a compression mechanism and a resin layer including a stack of three or more layers formed on a whole area or a portion of at least one surface of at least one part of the compression mechanism. A hardness of a layer most distant from a base in the resin layer is smaller than a hardness of a layer closest to the base in the resin layer. A difference in hardness between two adjacent layers in the resin layer is smaller than a difference in hardness between the layer most distant from the base and the layer closest to the base.Type: GrantFiled: December 19, 2011Date of Patent: January 26, 2016Assignee: Daikin Industries, Ltd.Inventors: Takeo Hayashi, Yuuichi Yamamoto, Masahide Higuchi, Chihiro Endou
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Patent number: 8647086Abstract: An enclosed compressor includes a compression element configured to compress a working fluid, a casing and a fixing member. The casing has a substantially cylindrical shell plate and houses the compression element. The fixing member is welded to the shell plate. The compression element is fixed to the fixing member by at least six fastening bolts.Type: GrantFiled: July 24, 2008Date of Patent: February 11, 2014Assignee: Daikin Industries, Ltd.Inventors: Masahide Higuchi, Yasutaka Ueno, Masanori Masuda
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Publication number: 20130280117Abstract: A compressor includes a compression mechanism and a resin layer including a stack of three or more layers formed on a whole area or a portion of at least one surface of at least one part of the compression mechanism. A hardness of a layer most distant from a base in the resin layer is smaller than a hardness of a layer closest to the base in the resin layer. A difference in hardness between two adjacent layers in the resin layer is smaller than a difference in hardness between the layer most distant from the base and the layer closest to the base.Type: ApplicationFiled: December 19, 2011Publication date: October 24, 2013Inventors: Takeo Hayashi, Yuuichi Yamamoto, Masahide Higuchi, Chihiro Endou
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Publication number: 20130280116Abstract: A compressor includes sliding members arranged to slide relative to each other when compressing a refrigerant. At least one of the sliding members has a resin layer that is formed on the whole area or a portion of at least one sliding surface. The resin layer has an arithmetic mean surface roughness (Ra) of 0.3 or more, or the whole area or a portion of an area opposed to the resin layer is entirely or partially harder than the resin layer and has an arithmetic mean surface roughness (Ra) of 0.3 or more.Type: ApplicationFiled: December 19, 2011Publication date: October 24, 2013Inventors: Takeo Hayashi, Yuuichi Yamamoto, Masahide Higuchi, Chihiro Endou
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Patent number: 8221096Abstract: A compressor has stator of a motor is installed in a closed container, on two planes normal to the center axis 1a of the container. On each of the planes, the stator is welded to the container at three welding points. This mounting arrangement on two planes with three welding points on each plane minimizes the amount of movement of the stator in the direction of the center axis.Type: GrantFiled: March 15, 2007Date of Patent: July 17, 2012Assignee: Daikin Industries, Ltd.Inventors: Hiroyuki Taniwa, Masahide Higuchi, Hideki Mori, Yasukazu Nabetani, Azusa Ujihara
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Patent number: 7967579Abstract: A hermetic compressor is disposed with an annular motor stator, a motor rotor, a casing and plural spot joining portions. The motor rotor is disposed such that it may freely rotate in a space inside the motor stator. The casing includes a cylindrical portion. The cylindrical portion houses the motor stator and the motor rotor. The plural spot joining portions fix the motor stator to the cylindrical portion by spot joining in a state where a clearance is secured between the motor stator and the cylindrical portion.Type: GrantFiled: August 8, 2007Date of Patent: June 28, 2011Assignee: Daikin Industries, Ltd.Inventors: Masahide Higuchi, Masanori Masuda, Toshiaki Yoshii, Kazuhiro Furusho, Satoshi Ishikawa
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Publication number: 20100275632Abstract: A refrigeration system includes a compression mechanism, a radiator, an expansion mechanism, an evaporator and a ?-type silencer 20. The ?-type silencer includes a first silencing space, a second silencing space and a first communication path. The first communication path allows the first silencing space and the second silencing space to be communicated. Additionally, the ?-type silencer is incorporated in at least one of a section between a refrigerant discharge side of the compression mechanism and an inlet side of the radiator, and a section between an outlet side of the evaporator and a refrigerant suction side of the compression mechanism.Type: ApplicationFiled: August 28, 2007Publication date: November 4, 2010Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Satoshi Ishikawa, Masanori Masuda, Masahide Higuchi
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Publication number: 20100242522Abstract: A refrigeration system includes a first refrigerant passage, a ?-type silencer, and a second refrigerant passage. The ?-type silencer has a first silencing space, a second silencing space, and a communication path. The first silencing space communicates with the first refrigerant passage. The second silencing space is disposed below the first silencing space. The communication path extends from the lower end of the first silencing space to the outside of the first silencing space and communicates with the second silencing space. The second refrigerant passage extends from the lower end of the second silencing space.Type: ApplicationFiled: August 28, 2007Publication date: September 30, 2010Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Satoshi Ishikawa, Masanori Masuda, Masahide Higuchi
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Publication number: 20100196185Abstract: An enclosed compressor includes a compression element configured to compress a working fluid, a casing and a fixing member. The casing has a substantially cylindrical shell plate and houses the compression element. The fixing member is welded to the shell plate. The compression element is fixed to the fixing member, wherein fixing of the compression by at least six fastening bolts.Type: ApplicationFiled: July 24, 2008Publication date: August 5, 2010Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Masahide Higuchi, Yasutaka Ueno, Masanori Masuda
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Publication number: 20100175409Abstract: An air conditioning apparatus is provided whereby the pressure pulsation generated by a compressor can be entirely reduced both during cooling and during heating, and a muffler can be shared. The air conditioning apparatus has a refrigerant circuit. The refrigerant circuit is configured so that a compressor for compressing a refrigerant, an indoor heat exchanger, an outdoor heat exchanger, and a four-way switch valve are connected via a refrigerant pipe. The four-way switch valve switches the flow of refrigerant compressed by the compressor to either the indoor heat exchanger or the outdoor heat exchanger. The air conditioning apparatus further includes a pressure pulsation reducing component. The pressure pulsation reducing component is provided between the four-way switch valve and the indoor heat exchanger. The pressure pulsation reducing component reduces pressure pulsation inside the refrigerant circuit. The pressure pulsation is generated by the compressor.Type: ApplicationFiled: August 8, 2007Publication date: July 15, 2010Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Satoshi Ishikawa, Masanori Masuda, Masahide Higuchi
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Publication number: 20100166577Abstract: A hermetic compressor is disposed with an annular motor stator, a motor rotor, a casing and plural spot joining portions. The motor rotor is disposed such that it may freely rotate in a space inside the motor stator. The casing includes a cylindrical portion. The cylindrical portion houses the motor stator and the motor rotor. The plural spot joining portions fix the motor stator to the cylindrical portion by spot joining in a state where a clearance is secured between the motor stator and the cylindrical portion.Type: ApplicationFiled: August 8, 2007Publication date: July 1, 2010Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Masahide Higuchi, Masanori Masuda, Toshiaki Yoshii, Kazuhiro Furusho, Satoshi Ishikawa
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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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Patent number: 7618242Abstract: A front head of a cylinder and a mounting plate are tightly fixed to each other. The mounting plate is welded to a casing. The mounting plate is made of steel containing 2.0% or less of carbon therein. Furthermore, a stator core of a compressor motor is welded to the casing. A hermetic sealed compressor is configured in a high-pressure domed type. A supercritical fluid is used as an operating fluid.Type: GrantFiled: February 25, 2003Date of Patent: November 17, 2009Assignee: Daikin Industries, Ltd.Inventors: Masahide Higuchi, Eiji Kumakura, Takashi Hirouchi