Non-working And Working Fluids Intermix In Working Chamber Patents (Class 418/97)
  • Patent number: 10578108
    Abstract: The present invention relates to an electric compressor. The electric compressor according to an exemplary embodiment of the present invention includes a rear housing in which a discharging chamber to which a coolant is discharged is formed; an oil separator disposed in the discharging chamber, having a coolant introduction hole through which the coolant is introduced formed therein and disposed to be eccentric to one side of the rear housing; a partitioning wall partitioning an inner region of the discharging chamber into different regions and having communication portions formed at different positions; and a resonance chamber in which introduction and diffusion of the coolant passing through the communication portions are simultaneously performed.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: March 3, 2020
    Assignee: HANON SYSTEMS
    Inventors: Hyun Seong Ahn, Kweon Soo Lim, Chi Myeong Moon, Soo Cheol Jeong
  • Patent number: 10451066
    Abstract: A screw compressor (10) comprising a compressor device (18), in particular, at least one screw rotor (20, 22), which guides a compressed medium to an oil separating device (30). The compressor (10) has a first volume (32) and a second volume (34), in addition to a separating device (36) separating the first and the second volumes (32, 34) from each other. The first volume (32) is defined by a housing inner wall (52) and the separating device (36) which separates the first volume (32) from the second volume (34). The separating device (36) comprises a demistor (40) and an oil discharging device (54) is arranged on the separating device (36).
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: October 22, 2019
    Assignee: GEA REFRIGERATION GERMANY GMBH
    Inventor: Dmytro Zaytsev
  • Patent number: 9964122
    Abstract: A compressor is provided and may include a shell having an inner surface and an outer surface and a bearing housing disposed within the shell and having an engagement surface opposing the inner surface. The engagement surface may include a first channel formed substantially perpendicular to a longitudinal axis of the shell and a second channel formed substantially parallel to the longitudinal axis of the shell and in communication with the first channel. The first channel and the second channel may receive a deformed portion of the shell therein to fix a position of the bearing housing relative to the shell.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: May 8, 2018
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Jason M. Warner, Gregg M. Hemmelgarn, James A. Schaefer
  • Patent number: 9816506
    Abstract: An oil lubrication system for a multi-stage compressor separates oil from a refrigerant at an intermediate pressure following the first stage of compression and then routes the separated oil at the intermediate pressure to the compressor suction cavity bearings at the intermediate pressure, thus avoiding further compression of oil in subsequent stages of compression. The efficiency of the multi-stage compressor can be increased by not raising the pressure of the oil through the subsequent stages of compression.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: November 14, 2017
    Assignee: TRANE INTERNATIONAL INC.
    Inventors: Jerry Allen Rood, Michael Gerard Benco, Scott Joseph Smerud, John Robert Sauls, Rodney Lakowske
  • Patent number: 9568004
    Abstract: A rotary compressor (100) includes a closed casing (1), a cylinder (15), a piston (28), a lower bearing member (7), a vane (33), a suction port (20), a discharge port (41), and a partition member (10). The partition member (10) is attached to the lower bearing member (7) so as to form a refrigerant discharge space (52) serving as a flow path of a refrigerant discharged from a discharge chamber (26b) through the discharge port (41). The lower bearing member (7) is provided with a first recess (7t) on the same side as the suction port (20) with respect to a reference plane, the reference plane being a plane including a central axis of the cylinder (15) and a center of the vane (33) when the vane (33) protrudes maximally toward the central axis of the cylinder (15). A portion of oil stored in an oil reservoir (22) flows into the first recess (7t), and thereby an oil retaining portion (53) is formed.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: February 14, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takeshi Ogata, Yu Shiotani, Takumi Hikichi, Kentaro Shii, Tadayoshi Shoyama, Masanobu Wada, Hiroshi Hasegawa, Hirofumi Yoshida, Hiroaki Nakai, Akira Hiwata, Daisuke Funakosi, Ryuichi Ohno, Tsuyoshi Karino
  • Patent number: 9528514
    Abstract: In a gas compressor, an outline shape of an inner peripheral surface (41) of a cylinder (40) is set such that in a point before a first compression chamber (43B) adjacent to a second compression chamber (43A) in an upstream side in a rotational direction (W) is exposed to a discharge hole (45b) of a primary discharge portion (45) with rotation of a rotor (50) in the rotational direction (W) (point where the first compression chamber (43B) is positioned upstream of an angular position of being exposed to the discharge hole (45b) of the primary discharge portion (45)), a pressure of refrigerant gas (G) inside the compression chamber (43) reaches a discharge pressure. Therefore, the discharge hole (45b) of the primary discharge portion (45) always discharges the refrigerant gas (G) from the compression chamber (43).
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: December 27, 2016
    Assignee: CALSONIC KANSEI CORPORATION
    Inventors: Hirotada Shimaguchi, Kouji Hirono, Masahiro Tsuda, Tatsuya Osaki, Shizuma Kaneko
  • Patent number: 9470229
    Abstract: In a single screw compressor, gates of a gate rotor mesh with helical grooves of the screw rotor in a casing. The casing has a low pressure space, and a divider wall covering the outer peripheral surface of the screw rotor to divide the fluid chamber formed by the helical groove from the low pressure space. An inlet is formed in the divider wall to partially expose the outer peripheral surface of the screw rotor to the low pressure space. The fluid chamber in a suction phase into which the low pressure fluid flows from the low pressure space is divided from the low pressure space by the gate entering the helical groove after the helical groove has moved from a position where the helical groove faces the inlet to a position where the helical groove is covered with the divider wall.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: October 18, 2016
    Assignee: Daikin Industries, Ltd.
    Inventors: Mohammod Anwar Hossain, Masanori Masuda
  • Patent number: 9206914
    Abstract: A check valve is provided. The check valve includes a position limiting member, a back-flow preventing member and a lid body. The back-flow preventing member is disposed between the position limiting member and the lid body, and a blocking portion of the back-flow preventing member is flexible. When the blocking portion is impacted by an external water source, a gap will be formed between an external peripheral verge of the blocking portion and a stepped portion of the position limiting member to allow the water source to flow through the position limiting member. When the blocking portion is impacted by a reverse water source, the external peripheral verge of the blocking portion is abutted against the stepped portion to unallow the water source to flow through the position limiting member.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: December 8, 2015
    Inventor: Tsai-Chen Yang
  • Patent number: 9188126
    Abstract: A hermetic compressor is provided that may include a fluid guide disposed in an inner space of an intermediate chamber, so as to guide oil, discharged from a first compression chamber of a first compression device into the inner space of the intermediate chamber, to a second compression chamber of a second compression device without remaining in the inner space of the intermediate chamber, whereby noise generated due to an excessive amount of oil remaining in the inner space of the intermediate chamber may be reduced, and simultaneously a shortage of oil in the second compression device may be prevented.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: November 17, 2015
    Assignee: LG ELECTRONICS INC.
    Inventors: Jinung Shin, Bumdong Sa, Yunhi Lee
  • Patent number: 9145892
    Abstract: 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: Grant
    Filed: January 30, 2014
    Date of Patent: September 29, 2015
    Assignee: Hitachi Industrial Equipment Systems, Co., Ltd.
    Inventors: Natsuki Kawabata, Kazuaki Shiinoki, Hirotaka Kameya, Masakazu Aoki
  • Patent number: 9017051
    Abstract: A rotary vacuum pump includes a suction chamber (12) in a housing (10). A rotor (14) is eccentrically mounted in the suction chamber (12). Sliding vanes (18) are connected to the rotor (14). Further, a discharge channel (30) is connected to the suction chamber (12) and to an oil chamber (32). A valve (38) is disposed between the discharge channel (30) and the oil chamber (32) in order to prevent the medium from flowing back from the oil chamber (32) into the suction chamber (12). At least one compensating channel (50) is connected to the discharge channel (30) and to the oil chamber (32).
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: April 28, 2015
    Assignee: Oerlikon Leybold Vacuum GmbH
    Inventor: Eric Figoni
  • Patent number: 8974205
    Abstract: A progressing cavity gas pump with a stator which has a stator interior with an elastomeric inner surface as well as a gas outlet and a gas inlet, between which a pump delivery direction is defined, and with a rotor which engages with the stator interior, wherein below the stator, a lubricant reservoir is arranged which is connected via lubricant conduit devices to the stator interior. A progressing cavity gas pumping method using a progressing cavity gas pump, gas coming from a gas inlet is delivered with a rotationally driven rotor within a stator and through a stator interior having an elastomeric inner surface to a gas outlet and is compressed, and wherein from a lubricant reservoir below the stator, a lubricant supply to the stator interior takes place via lubricant conduit devices, and lubricant from the stator interior is recycled via the lubricant conduit devices into the lubricant reservoir.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: March 10, 2015
    Assignee: NETZSCH-Mohopumpen GmbH
    Inventors: Lorenz Lessmann, Ramiro Duarte Trapp, Elimar Volkmann, Gabriel Starke, Osnildo Borchardt
  • Patent number: 8956132
    Abstract: A compressor includes a main body having in a housing a vane back-pressure space configured to project a vane forming a compression room for compressing gas, and a centrifugal oil separator. A discharge section to which the gas from the oil separator is ejected is formed in the housing, and the oil separator includes a pressure-adjusting valve configured to adjust pressure of the vane back-pressure space according to pressure of the discharge section. The pressure-adjusting valve is arranged in the oil separator without being affected by the gas ejected from the oil separator.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: February 17, 2015
    Assignee: Calsonic Kansei Corporation
    Inventors: Keita Satou, Makoto Kawamura, Hiroshi Iijima, Hiroyuki Sato, Keisuke Nakazawa, Yukihiko Ando, Tohru Kamiyama, Hiroyuki Seimiya, Hiroki Shinkawa, Fumiaki Maruoka, Katsumi Endou, Masanori Ogawa
  • Patent number: 8882482
    Abstract: A compressor has auxiliary and main oil reservoir chambers that retain lubricant oil that is separated from refrigerant in an oil separation chamber. A part of the auxiliary oil reservoir chamber is defined by a peripheral wall of the oil separation chamber. An introducing passage for introducing lubricant oil in the oil separation chamber to the auxiliary oil reservoir chamber is formed in the peripheral wall. The inlet of the introducing passage opens to the oil separation chamber on the inner surface of the peripheral wall. The outlet of the introducing passage opens to the auxiliary oil reservoir chamber. The main oil reservoir chamber is located below the auxiliary oil reservoir chamber in the direction of gravity. A drain port for draining lubricant oil in the auxiliary oil reservoir chamber to the main oil reservoir chamber is formed in a bottom wall of the auxiliary oil reservoir chamber.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: November 11, 2014
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Tsubasa Mitsui, Shinichi Sato, Kazuo Kobayashi, Akio Saiki, Akihiro Nakashima, Shinsuke Asou
  • Patent number: 8820082
    Abstract: A screw expander system has a condenser positioned for receiving a mixture of oil and operating medium from a screw expander. A pump pressure-feeds the mixture from the condenser to an evaporator where the operating medium is evaporated. An oil separating tank separates the mixture from the evaporator into the gaseous operating medium and the oil, and the operating medium is returned to the screw expander via a throttle mechanism. The oil can thereby be supplied to the screw expander without providing a separate oil pump, as a result of which the screw expander system is compact.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: September 2, 2014
    Assignee: Kobe Steel, Ltd.
    Inventor: Shoji Yoshimura
  • Patent number: 8800688
    Abstract: In aspects, the disclosure provides a drilling motor that includes a lubricating unit that selectively supplies a lubricant to the drilling fluid before the drilling fluid passes through the drilling motor so as to lubricate the stator and/or the rotor to reduce friction between the stator and the rotor and to reduce wear of the motor.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: August 12, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Hendrik John, Harald Grimmer
  • Patent number: 8794941
    Abstract: A positive displacement compressor designed for near isothermal compression. A rotor includes a curved sealing portion that coincides with a in an interior rotor casing wall. Liquid injectors provide cooling liquid. A gate moves within the compression chamber to either make contact with or be proximate to the rotor as it turns. Gate positioning systems position the gate in this manner, taking into account the shape of the rotor. Outlet valves allow for expulsion of liquids and compressed gas. The unique geometry and relationship between the parts provides for efficiencies and higher pressures not previously found in existing compressor designs.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: August 5, 2014
    Assignee: Oscomp Systems Inc.
    Inventors: Pedro Santos, Jeremy Pitts, Andrew Nelson, Johannes Santen, John Walton, Mitchell Westwood, Harrison O'Hanley
  • Patent number: 8616856
    Abstract: In a water injection air compressor including a compressor main body for compressing air, a water-feed line for feeding water to an actuation chamber in the compressor main body, an air release valve for releasing the compressed air from the compressor main body, and a control panel for executing an on-load operation mode in which water is fed into the actuation chamber and an air release valve is closed and a no-load operation mode in which the water is fed into the actuation chamber and the air release valve is opened, wherein the control panel further executes a dry operation mode in which the water is prevented from being fed into the actuation chamber and with the air release valve is opened.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: December 31, 2013
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Takehiro Matsuzaka, Hiroshi Ohta
  • Patent number: 8597005
    Abstract: A compressor incorporated with an oil separator having a separation chamber, which is placed adjacent to a discharge chamber, has a space formed in the entire inside of the separation chamber, separates oil-containing gas, being introduced, into gas and oil by centrifugal separation, allows the separated oil to drop downward, and upwardly extracts the separated gas, and also having a lower hole for introducing the separated oil into an oil storing chamber. The oil separator is formed as a joining structure of two compressor forming members, and a portion of the oil storing chamber, other than a portion where the lower hole is opened, is communicated with the separation chamber via a gas release passageway at least a part of which is formed between the two compressor forming members.
    Type: Grant
    Filed: February 13, 2008
    Date of Patent: December 3, 2013
    Assignee: Sanden Corporation
    Inventors: Tatsuki Nomura, Goushi Iketaka
  • Publication number: 20130287618
    Abstract: Oil recirculation mechanism includes an oil separation portion (separation chamber 104b2, separation pipe 130) for separating oil from a discharged refrigerant, oil storage chamber 132 for storing the separated oil, oil return passage through which the oil storage chamber 132 communicates with the suction chamber 119, and orifice 136 with a filter. The oil storage chamber 132 extends in a diametric direction of a compressor housing and has an open end at an outer face of the housing, and the open end is occluded by an occluding member. A partition wall (bulge portion 132a), that separates the oil storage chamber 132 from the suction chamber 119, is disposed in a region more inside than the opening of the open end. An oil return passage is linearly formed through the partition wall and the orifice 136 with a filter is accommodated and positioned in the oil return passage.
    Type: Application
    Filed: November 17, 2011
    Publication date: October 31, 2013
    Inventors: Tsutomu Ishikawa, Yujiro Morita, Yukihiko Taguchi
  • Patent number: 8512019
    Abstract: In a screw compression apparatus in which shaft sealing members (13, 14) isolate a bearing space (7, 8) from a rotor chamber (5) and a lubricating fluid separating collector (3) separates the rotor lubricating fluid from the target gas discharged by the screw compressor (2), rotor lubricating fluid separated by the lubricating fluid separating collector (3) is introduced into the rotor chamber (5) via a rotor lubricating flow channel (25), and a bearing lubricating system (17) supplies a bearing lubricating fluid to the bearing space (7, 8). The bearing lubricating fluid flowing out from the bearing space (7, 8) is cooled and returned to the bearing space (7,8). A part of the target gas may be supplied to the shaft sealing members (13, 14) at a location between carbon rings of the shaft sealing members.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: August 20, 2013
    Assignee: Kobe Steel, Ltd.
    Inventors: Tetsuya Kakiuchi, Yasushi Amano
  • Publication number: 20130209299
    Abstract: A positive displacement rotary compressor is designed for near isothermal compression, high pressure ratios, high revolutions per minute, high efficiency, mixed gas/liquid compression, a low temperature increase, a low outlet temperature, and/or a high outlet pressure. Liquid injectors provide cooling liquid that cools the working fluid and improves the efficiency of the compressor. A gate moves within the compression chamber to either make contact with or be proximate to the rotor as it turns.
    Type: Application
    Filed: March 1, 2013
    Publication date: August 15, 2013
    Applicant: OSCOMP SYSTEMS INC.
    Inventor: OSCOMP SYSTEMS INC.
  • Patent number: 8485803
    Abstract: The present invention relates to a scroll compressor, with an oil-separating drive shaft, that comprises a housing a fixed scroll which is installed inside the housing, a orbiting scroll which orbits around the fixed scroll, and a drive shaft which drives the orbiting scroll. In the orbiting scroll, a discharge hole is formed. A discharge path is formed along the longitudinal direction of the drive shaft so that discharged coolant from the discharge hole flows therethrough. At least, a part of the discharge path is inclined forward from the rotary axis to the exterior. A lubrication hole is formed in the drive shaft that penetrates from the discharge path to the outer surface of the drive shaft.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: July 16, 2013
    Assignees: Doowon Technical College, Doowon Electronic Co., Ltd.
    Inventors: Geonho Lee, Inhwe Koo
  • Patent number: 8469684
    Abstract: A rotary vacuum pump includes a suction chamber (12) in a housing (10). A rotor (14) is eccentrically mounted in the suction chamber (12). Sliding vanes (18) are connected to the rotor (14). Further, a discharge channel (30) is connected to the suction chamber (12) and to an oil chamber (32). A valve (38) is disposed between the discharge channel (30) and the oil chamber (32) in order to prevent the medium from flowing back from the oil chamber (32) into the suction chamber (12). At least one compensating channel (50) is connected to the discharge channel (30) and to the oil chamber (32).
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: June 25, 2013
    Assignee: Oerlikon Leybold Vacuum GmbH
    Inventor: Eric Figoni
  • Patent number: 8454334
    Abstract: A compressor system includes a lubricant reservoir, a screw compressor, and a valve. The screw compressor includes a housing defining a compression chamber having a suction port, a discharge port, a first lubricant feed port located between the suction port and the discharge port, and a second lubricant feed port located between the discharge port and the first lubricant feed port. The valve is in fluid communication with the lubricant reservoir, the first lubricant feed port via a first lubricant feed passageway, and the second lubricant feed port via a second lubricant feed passageway. The valve is movable between a first position and a second position. In the first position, the valve fluidly connects the lubricant reservoir to the first lubricant feed passageway to direct lubricant to the first lubricant feed port. In the second position, the valve fluidly connects the lubricant reservoir to the second lubricant feed passageway to direct lubricant to the second lubricant feed port.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: June 4, 2013
    Assignee: Trane International Inc.
    Inventors: Joseph Heger, Robert Mayfield
  • Patent number: 8435020
    Abstract: A screw compressor (10) is provided with shaft seal sections (28, 41) located on opposite sides of a compression chamber (24) of a screw rotor (25), to prevent mixing of oil in bearings (27, 39, 40) into the compression chamber (24) and leakage of process gas from the compression chamber (24). A suction-opening return line (52) interconnects the shaft seal section (41) on the discharge side of the compression chamber (24) and a suction opening (17) of the compressor body (11). A supply-process-gas communicating line (61) interconnects the suction opening (17) of the compressor body (11) and the upper part of the oil supply tank (13), and a shaft seal section (53) divides the inside of the compressor body (11) and an atmospheric environment.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: May 7, 2013
    Assignee: Kobe Steel, Ltd.
    Inventor: Yasushi Amano
  • Patent number: 8419394
    Abstract: To a hermetic compressor and a refrigeration cycle device having the same, an oil separator for separating oil from a refrigerant discharged from a compression unit is added. Separated oil is recollected into an oil pump driven by a driving motor. Because refrigerant separated from the oil is prevented from being re-introduced into the compressor, a cooling capability of the refrigeration cycle device may be enhanced. Because the oil pump is driven by the driving force of the driving motor, the compressor may have a simplified configuration, and the fabrication costs may be reduced. The oil used for a crankshaft lubrication process is returned to the oil pump by forming an oil pocket between bearing surfaces of a crankshaft and the oil pump, oil may be prevented from back-flowing to the oil separator from the crankshaft. This may allow oil to be smoothly recollected into the oil pump.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: April 16, 2013
    Assignee: LG Electronics Inc.
    Inventors: Nam-Kyu Cho, Hyo-Keun Park, Byeong-Chul Lee, Se-Heon Choi
  • Patent number: 8226388
    Abstract: In an oil-cooled screw compressor comprising, a compressor body including a pair of a male rotor and a female rotor, a motor including a stator and a motor rotor connected to one of the male and female rotors, and an oil separator container for gathering the oil from a mixture of the gaseous manner and oil to restrain the oil from proceeding with the compressed gaseous matter after the mixture of the gaseous manner and oil is discharged from the pair of male and female rotors, a rotational axis of the motor rotor and the rotational axis of the one of the male and female rotors are coaxial with respect to each other.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: July 24, 2012
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Hideharu Tanaka, Hiroyuki Matsuda
  • Patent number: 8202072
    Abstract: A lubricant-tight vane rotary vacuum pump, includes a pump stage (17) having a pump stage housing (10) with a gas inlet, compression chamber (11), and a gas outlet (51), a channel (50) connecting the compression chamber (11) with the gas outlet (51), and a groove (54) at least partially surrounding a mouth of the connecting channel (50) that opens into the gas outlet (51), so that lubricant, which is tossed out of the compression chamber, is collected in the groove (54) and re-entry of the lubricant back into the compression chamber (11) is prevented.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: June 19, 2012
    Assignee: Pfeiffer Vacuum GmbH
    Inventors: Thomas Schneider, Juergen Wagner
  • Patent number: 8182565
    Abstract: A compressor incorporated with an oil separator having a separation chamber and communication holes. The separation chamber is placed adjacent to a discharge chamber, has a space formed in the entire inside of the separation chamber, separates oil-containing gas, which is introduced into the separation chamber, into gas and oil by centrifugal separation, allows the separated oil to drop downward, and upwardly extracts the separated gas. The communication holes interconnect the discharge chamber and the separation chamber and introduce the oil-containing gas, coming from the discharge chamber, into the separation chamber. The communication holes are arranged in the separation chamber, in a direction extending from a gas release side to an oil drop side. The structure of an oil separation section is simplified to improve productivity and reduce cost, and a high degree of design freedom of the position of a discharge port is obtained.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: May 22, 2012
    Assignee: Sanden Corporation
    Inventor: Tatsuki Nomura
  • Patent number: 8162636
    Abstract: A scroll type compressor has a fixed scroll member, a movable scroll member, an oil reservoir, a back-pressure chamber, an oil extraction passage, a flow passage, and a partition wall. The back-pressure chamber disposed behind the movable scroll member is in communication with a discharge chamber. The oil extraction passage having a regulating valve or a throttle connects the back-pressure chamber to the oil reservoir. The oil return passage and the flow passage connect the oil reservoir to a suction chamber, respectively. The flow passage introduces excess lubricating oil into the suction chamber when the level of lubricating oil in the oil reservoir becomes higher than a predetermined level. The partition wall disposed between the openings of the oil extraction passage for restricting lubricating oil from the oil extraction passage other than the excess lubricating oil collected in the oil reservoir from flowing to the flow passage.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: April 24, 2012
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Kenji Yokoi, Masao Iguchi, Kazuhiro Kuroki, Tatsuya Ito
  • Patent number: 8096794
    Abstract: A compressor comprises an oil separator for separating oil from a refrigerant compressed by a compression mechanism unit, and a high-pressure oil storage chamber for storing the oil separated by the oil separator. At least a portion of the oil separator is provided outside a housing. The high-pressure oil storage chamber has an outer wall that is thicker than the outer wall of the housing accommodating the compression mechanism unit, and an end wall of the housing is formed by this thicker outer wall.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: January 17, 2012
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Shigeki Iwanami, Hiroyasu Kato, Yasuhiro Oki, Yoichiro Kawamoto
  • Patent number: 8092200
    Abstract: In a gas compressor, a cyclone block is configured to include a substantially cylindrical space into which a compressed gas is introduced to separate refrigeration oil from the gas. A pressure bypass is formed in the substantially cylindrical space defined by an outer cylindrical unit and an inner cylindrical unit to communicate with a discharge chamber having lower pressure than that of the substantially cylindrical space. The pressure bypass includes a pressure valve to open and close the pressure bypass in accordance with the internal pressure of the substantially cylindrical space having the pressure bypass. During a high speed operation of a compressor unit, the coolant gas including unseparated refrigeration oil is discharged from the pressure bypass.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: January 10, 2012
    Assignee: Calsonic Kansei Corporation
    Inventors: Hiroshi IiJima, Hiromiki Ohno
  • Patent number: 8007263
    Abstract: A water-lubricated compressor has a discharge on-off valve in a discharge channel located between a discharge port of a compressor body and a water separating/recovering unit. A water circulation on-off valve is disposed in a water circulation channel located between a water cooler and a water supply portion in the compressor body. A gas release channel provides communication between a gas phase portion of the water separating/recovering unit and the exterior of the water separating/recovering unit. A gas release on-off valve is disposed in the gas release channel. When the compressor body is not in operation, the discharge on-off valve and the water circulation on-off valve are closed and the gas release on-off valve is opened, allowing water to be recovered to the water separating/recovering unit. When there is no demand for compressed gas, it is possible to remove water from the water cooler, which otherwise may be damaged.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: August 30, 2011
    Assignee: Kobe Steel, Ltd.
    Inventors: Shoji Yoshimura, Akinori Tamura
  • Publication number: 20110129362
    Abstract: 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: Application
    Filed: August 18, 2010
    Publication date: June 2, 2011
    Inventors: Hirotaka KAMEYA, Kazuaki Shiinoki, Natsuki Kawabata, Hirokatsu Kohsokabe
  • Patent number: 7914267
    Abstract: It is an object of the present invention to provide a multistage compressor employing a gas injection system for a CO2 cycle which is able to improve the compression efficiency and the compression performance thereof. In a multistage compressor (2) for a CO2 cycle (1) that carries out two-stage compression by discharging CO2 refrigerant gas compressed in a low-stage side rotary compressing mechanism (4) into a closed housing (3) and taking intermediate pressure refrigerant gas in the closed housing (3) by a high-stage side scroll compressing mechanism (5), a gas injection circuit (15) for injecting intermediate pressure CO2 refrigerant gas extracted from a refrigerant circuit into the closed housing (3) is connected to the closed housing (3), and the pressure ratios of the low-stage side rotary compressing mechanism (4) and the high-stage side scroll compressing mechanism (5) are substantially equivalent, and the ratios of displacement volume are substantially equivalent.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: March 29, 2011
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hajime Sato, Yoshiyuki Kimata
  • Publication number: 20110064596
    Abstract: A scroll compressor is provided in which the amount of lubricant oil supply is appropriately controlled over a low to high rotational frequency range of the scroll compressor. The scroll compressor has an oil supply unit and an oil supply passage. The oil supply unit includes a small hole with a diameter not exceeding a seal ring width of the sealing part and a groove which are formed on the end plate of the boss portion on the back side of the orbiting scroll. As the orbiting scroll orbitally moves, oil in the high pressure hydraulic chamber pools in the small hole to be discharged, across the seal ring, into the back pressure chamber. The oil supply passage communicates between the high pressure hydraulic chamber and the back pressure chamber.
    Type: Application
    Filed: August 10, 2010
    Publication date: March 17, 2011
    Inventors: Yuichi YANAGASE, Eiji Sato, Isamu Tsubono, Mutsunori Matsunaga, Satoshi Nakamura, Masatsugu Chikano
  • Publication number: 20110014077
    Abstract: Method for cooling a liquid-injected compressor element, whereby a liquid is injected in the compression chamber of this compressor element (2) via an injection valve (13), said method comprising the step of adjusting the quantity of liquid which is injected in the compression chamber of this compressor element (2) as a function of a specific adjusting parameter, irrespective of any other possible adjustments, wherein the quantity of liquid to be injected is adjusted by means of a second injection valve (19), which has the shape of an adjustable valve to this end.
    Type: Application
    Filed: March 25, 2009
    Publication date: January 20, 2011
    Inventor: Kristof Adrien Laura Martens
  • Patent number: 7862313
    Abstract: A compressor and an oil separating device therefor are provided which are capable of always maintaining a predetermined amount of oil in the compressor without additionally providing an oil separating device along a refrigerating cycle system. This results in the refrigerating cycle system having simplified piping and the refrigerant discharged from the compressor having a constant pressure, thereby preventing a function of the refrigerating cycle system from being reduced. The compressor includes a casing, a compression device having a compression chamber disposed within the casing and configured to receive, compress, and output a refrigerant, and an oil separating device disposed within the casing.
    Type: Grant
    Filed: November 1, 2007
    Date of Patent: January 4, 2011
    Assignee: LG Electronics Inc.
    Inventors: Seon-Woong Hwang, Myung-Kyun Kiem, Byung-Kil Yoo, Cheol-Hwan Kim, Chul-Su Jung, Dong-Koo Shin, Se-Heon Choi, Yang-Hee Cho, Byeong-Chul Lee, Hyo-Keun Park, Sung-Yong Ahn, Ki-Tae Jang
  • Patent number: 7819646
    Abstract: A pump having a rotor, a stator, a housing enclosing the rotor and the stator, the housing having an inlet for a fluid, and a port for receiving a fluid which acts on deposits on a surface of the rotor and on a surface of the stator positioned downstream from the inlet.
    Type: Grant
    Filed: October 6, 2003
    Date of Patent: October 26, 2010
    Assignee: Edwards Limited
    Inventors: Mark Christopher Hope, Clive Marcus Lloyd Tunna, Frederick John Underwood
  • Patent number: 7766632
    Abstract: A scroll-type compressor includes a compression unit, a main frame supporting the compression unit, and a driving shaft having an oil supply path. The oil supply path is located eccentrically with the driving shaft and an upper part of the driving shaft is supported by the main frame. The compressor also has a motor for rotating the driving shaft, an oil cap located on an upper side of a rotor of the motor, and a balance member to compensate the driving shaft.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: August 3, 2010
    Assignee: LG Electronics Inc.
    Inventors: Jeong Hwan Suh, Cheol Hwan Kim, Dong Koo Shin
  • Patent number: 7762799
    Abstract: In an oil-cooled screw compressor comprising, a compressor body including a pair of a male rotor and a female rotor, a motor including a stator and a motor rotor connected to one of the male and female rotors, and an oil separator container for gathering the oil from a mixture of the gaseous manner and oil to restrain the oil from proceeding with the compressed gaseous matter after the mixture of the gaseous manner and oil is discharged from the pair of male and female rotors, a rotational axis of the motor rotor and the rotational axis of the one of the male and female rotors are coaxial with respect to each other.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: July 27, 2010
    Assignee: Hitachi Industrial Equipment Systems Co.
    Inventors: Hideharu Tanaka, Hiroyuki Matsuda
  • Patent number: 7748968
    Abstract: In a two-cylinder rotary compressor, two compressing sections accommodated in a compressor body and an accumulator are connected to each other by two suction pipes each formed with an L-shaped bend part in the intermediate pipe part thereof. To reduce a pressure loss caused by the flow resistance of a refrigerant sucked from the accumulator into the compressor, the L-shaped bend parts of the two suction pipes are arranged on different imaginary planes including the center axis line of the compressor body.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: July 6, 2010
    Assignee: Fujitsu General Limited
    Inventor: Naoya Morozumi
  • Patent number: 7748969
    Abstract: A foam control device includes a first member coupled to an oil reservoir of a compressor and a second member to prevent foam from flowing into an interior section of the compressor. when a shaft of the compressor rotates. The second member controls a position of the first member based on at least one condition which, for example, may include an amount of oil in the reservoir, an environmental condition, or the type of oil or refrigerant used. According to one embodiment, the first member includes a plate containing one or more apertures that allow oil, suctioned from the reservoir, to pass back into the reservoir when the compressor shaft rotates.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: July 6, 2010
    Assignee: LG Electronics Inc.
    Inventor: Kangw-No Um
  • Patent number: 7744357
    Abstract: A scroll compressor includes a fixed scroll, an orbiting scroll orbiting the fixed scroll to perform compression on a refrigerant, a discharge cover provided at an upper end of the fixed scroll and guiding discharge of a compressed refrigerant, a first discharge chamber from which the compressed refrigerant is discharged; a second discharge chamber communicating with the first discharge chamber and separating oil from the discharged refrigerant, and a third discharge chamber communicating with the second discharge chamber and guiding discharge of the separated refrigerant.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: June 29, 2010
    Assignee: LG Electronics Inc.
    Inventors: Seung Yup Kim, Myung Kyun Kim, Byung Kil Yoo
  • Patent number: 7736136
    Abstract: The present invention provides a compressor capable of arranging a refrigerant discharge port regardless of the location of a separation chamber. In this compressor, a separation tube is pressed in through an opening of the separation chamber, and by engaging a regulating ring with an engagement groove provided in the inner wall of the separation chamber, the movement of the separation tube in the anti-insertion direction is regulated. Therefore, unlike the conventional compressor, a refrigerant discharge pipe for regulating the movement of the separation tube in the anti-insertion direction need not be connected to the upper part of the separation tube, and the refrigerant discharge port can be arranged freely regardless of the location of the separation section.
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: June 15, 2010
    Assignee: Sanden Corporation
    Inventor: Shinichi Ohtake
  • Patent number: 7731486
    Abstract: This invention provides a compressor that can efficiently return lubricating oil through an oil storage chamber to a lubrication target site without residence of the lubricating oil within the discharge chamber and can prevent deterioration in lubrication performance. The compressor comprises a housing having a discharge chamber for lubricating oil-containing hydraulic fluid and a discharge port communicating with the discharge chamber, a rotational shaft extended into the housing, a compression unit for the suction, compression and discharge of the hydraulic fluid through the drive of the rotational shaft, and a lubricating oil separator comprising a separation chamber and an oil storage chamber. The separation chamber is provided between the discharge chamber and the discharge port in the housing. The oil storage chamber is located below the separation chamber. Lubricating oil separated from the hydraulic fluid in the separation chamber is introduced through an oil hole is stored in the oil storage chamber.
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: June 8, 2010
    Assignee: Sanden Corporation
    Inventor: Hiroyuki Yokoyama
  • Patent number: 7717688
    Abstract: An oil pump for a compressor is provided. The oil pump includes a pump body, a driving shaft coupled to the pump body, with a supply passage extending therethrough, and a plurality of pumping members which rotate with the driving shaft. Fluids such as oil are inhaled into the pump through various intakes, and the inhaled oil is directed towards the driving shaft, where the oil is supplied to the friction parts of the compressor for lubrication. The plurality of intakes into the pump provide for a continuous supply of oil to the friction parts.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: May 18, 2010
    Assignee: LG Electronics Inc.
    Inventors: Byoung Kil Yoo, Byeong Chul Lee
  • Patent number: 7690482
    Abstract: A screw compressor (20) has a housing having first and second ports along a flow path. A male-lobed rotor has a first rotational axis. A female-lobed rotor has a second rotational axis and is enmeshed with the male-lobed rotor to define a compression path between suction and discharge locations along the flow path. The compressor has a compressor lubrication network having a lubricant outlet port (242) along a low pressure cusp (244). An unloading slide valve element (102) may be along a high pressure cusp (105).
    Type: Grant
    Filed: February 7, 2005
    Date of Patent: April 6, 2010
    Assignee: Carrier Corporation
    Inventor: Stephen L. Shoulders
  • Patent number: 7670120
    Abstract: A scroll-type refrigerant compressor includes a drive shaft with an off-axis lubrication conduit which is supplied with oil from an oil pan located in the lower part of the compressor by an oil pump that is disposed at a first end of the shaft. The lubrication conduit has lubrication holes at the different shaft guide bearings. The second end of the shaft is equipped with a device that enables the orbital movement of the moving scroll of the compressor. The aforementioned shaft also includes a return conduit which is inclined in relation to the axis of the shaft and which extends over at least part of the length thereof. One of the ends of the return conduit opens at the wall of the shaft in the area located beyond the rotor on the side of the oil pan. In addition, fluid communication is provided between the lubrication conduit and the return conduit.
    Type: Grant
    Filed: May 23, 2006
    Date of Patent: March 2, 2010
    Assignee: Danfoss Commercial Compressors
    Inventors: Pierre Ginies, David Genevois, Jean De Bernardi