Sliding Abutment Patents (Class 418/11)
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Patent number: 7780426Abstract: A rotary compressor including a housing having first and second compressing chambers separated from each other, first and second flanges coupled to the housing, to close the first and second compressing chambers, respectively, an intermediate plate to separate the first and second compressing chambers from each other, first and second rollers rotatably installed in the first and second compressing chambers, respectively, first and second vanes to reciprocate in a radial direction of the first and second compressing chambers to divide the first and second compressing chambers, respectively, and a vane control device to control the reciprocating movement of the first vane by use of a suction pressure and a discharge pressure, for a variation in compression capacity. A first gap, defined at an end of the first roller, is smaller than a second gap defined at an end of the second roller.Type: GrantFiled: November 9, 2007Date of Patent: August 24, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Kyung Rae Cho, Phil Soo Chang, Hyeong Joon Seo, In Ju Lee, Ji Hoon Choi
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Patent number: 7780427Abstract: A two-stage rotary compressor includes a sealed cylindrical compressor housing in which first, second, third communication holes are provided apart in an axial direction on an outer peripheral wall; an accumulator held at an outside part of the housing; a low-pressure connecting pipe for connecting a bottom communication hole of the accumulator and the second communication hole; and an intermediate connecting pipe for connecting the first and third communication holes. The first and third communication holes are provided nearly in the same locations in the circumferential direction of the housing. The accumulator is held nearly in the same location in the circumferential direction as that of the second communication hole. The second communication hole is provided in a different location in the circumferential direction from those of the first and third communication holes for preventing interference between the low-pressure and intermediate connecting pipes each formed in arc shape.Type: GrantFiled: January 7, 2009Date of Patent: August 24, 2010Assignee: Fujitsu General LimitedInventors: Kenshi Ueda, Naoya Morozumi
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Patent number: 7775782Abstract: A variable capacity rotary compressor capable of reducing collision noise of a vane with a roller. The variable capacity rotary compressor includes a vane controller controlling the operation of a vane in order to vary compression capacity. The vane controller includes a control valve that switches a fluid channel so as to selectively apply discharge pressure and intake pressure to the vane guide slot, a connection channel that connects the control valve with the vane guide slot, a high-pressure channel that connects the control valve with a discharge side of the compressor, and a low-pressure channel that connects the control valve with an intake side of the compressor, and a throttle section that reduces the fluid channel of at least one of the high-pressure channel and the connection channel in order to reduce an initial discharge pressure applied to the vane guide slot.Type: GrantFiled: September 7, 2007Date of Patent: August 17, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Ji Hoon Choi, Jeong Il Park, Jeong Hoon Kang, Phil Soo Chang, Kyung Rae Cho, Jin Kyu Choi, Hyeong Joon Seo, In Ju Lee
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Patent number: 7762792Abstract: There is provided a rotary compressor capable of preventing deterioration of performance following plug fixing carried out to prevent falling-off of a spring member. The rotary compressor comprises a cylinder constituting a rotary compression element, a roller engaged with an eccentric portion formed in a rotary shaft of an electric element, and eccentrically rotated in the cylinder, a vane abutted on the roller to divide an inside of the cylinder into a low pressure chamber side and a high pressure chamber side, a spring member for always pressing the vane to the roller side, a housing portion of the spring member, formed in the cylinder, and opened to the vane side and a hermetically sealed container side, a plug positioned in the hermetically sealed container side of the spring member, and inserted into the housing portion to fit into a gap, and an O ring attached around the plug to seal a part between the plug and the housing portion.Type: GrantFiled: August 31, 2007Date of Patent: July 27, 2010Assignee: Sanyo Electric Co., Ltd.Inventors: Masaya Tadano, Haruhisa Yamasaki, Kenzo Matsumoto, Dai Matsuura, Kazuya Sato, Takayasu Saito, Toshiyuki Ebara, Satoshi Imai, Atsushi Oda, Takashi Sato, Hiroyuki Matsumori
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Patent number: 7748968Abstract: 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: GrantFiled: April 7, 2008Date of Patent: July 6, 2010Assignee: Fujitsu General LimitedInventor: Naoya Morozumi
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Publication number: 20100158729Abstract: A rotary expander includes: a cylinder (61); a piston (62) disposed inside the cylinder (61); closing members disposed with the cylinder (61) being sandwiched therebetween; and an injection passage for introducing further a working fluid in the expansion process of the working fluid. An introduction outlet (65c) of the injection passage leading to the working chamber (69) is provided at a position located inwardly away from the inner circumferential surface (61b) of the cylinder (61), on one of the closing members, in such a manner that the injection passage and the discharge passage are not communicated with each other.Type: ApplicationFiled: September 21, 2007Publication date: June 24, 2010Applicant: PANASONIC CORPORATIONInventors: Hiroshi Hasegawa, Takeshi Ogata, Takumi Hikichi, Masanobu Wada, Yasufumi Takahashi
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Patent number: 7717686Abstract: There is provided a compressor capable of feeding lubricating oil to a blade of a rotary type compression mechanism even if the oil level in an oil reservoir lowers. The compressor includes a low stage-side rotary type compression mechanism having a rotor, and a blade reciprocating with the rotation of the rotor while the tip end thereof is in contact with the rotor; a high stage-side scroll type compression mechanism for sucking and compressing refrigerant gas compressed by the low stage-side rotary type compression mechanism; a positive displacement lubrication pump for feeding lubricating oil to the high stage-side scroll type compression mechanism; and an oil feeding path for feeding the lubricating oil, which is fed to the high stage-side scroll type compression mechanism, toward the blade of the low stage-side rotary type compression mechanism.Type: GrantFiled: October 14, 2008Date of Patent: May 18, 2010Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kazuya Kondo, Hajime Sato, Yoshiyuki Kimata
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Publication number: 20100111737Abstract: A compressor includes a compression mechanism having two opposed end plates, a fixed member disposed between the two end plates, a movable member disposed between the two end plates, a bypass passage, and an opener/closer. The movable member is arranged to eccentrically move about a predetermined rotational axis to compress refrigerant in a compression chamber formed between the fixed member and the movable member. The bypass passageway has an upstream end opened to the compression chamber through which refrigerant is partially ejected from the compression chamber so as to be returned to a suction side of the compression mechanism. The cross section of the upstream end of the bypass passage is preferably elongated circumferentially about the rotational axis. The compression mechanism may include a plurality of bypass passages and a plurality of openers/closers.Type: ApplicationFiled: January 10, 2008Publication date: May 6, 2010Applicant: Daikin Industries, Ltd.Inventors: Hirofumi Higashi, Kazuhiro Furusho
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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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Compressor having a helmholtz type resonance chamber with a lowermost end connected to a gas passage
Patent number: 7704059Abstract: A compressor includes a first muffler chamber communicating with a first cylinder chamber, and a second muffler chamber communicating with a second cylinder chamber. The first muffler chamber and the second muffler chamber are communicated with each other by a gas passage. The gas passage is communicated with a Helmholtz type resonance chamber by a connecting passage. The connecting passage is connected to a lowermost end of the resonance chamber. Therefore, oil contained in the refrigerant gas, even if having entered into the resonance chamber, is discharged through the connecting passage located at the lowermost end of the resonance chamber to outside of the resonance chamber. Thus, since oil is not accumulated in the resonance chamber, the resonance chamber keeps generally constant in capacity at all times.Type: GrantFiled: December 8, 2005Date of Patent: April 27, 2010Assignee: Daikin Industries, Ltd.Inventors: Taisei Tamaoki, Takehiro Kanayama, Keiji Komori, Hiroyuki Taniwa -
Patent number: 7674097Abstract: Two rotary mechanism parts (70, 80) are provided in a rotary expander (60). The first rotary mechanism part (70) is smaller in displacement volume than the second rotary mechanism part (80). A first low-pressure chamber (74) of the first rotary mechanism part (70) and a second high-pressure chamber (83) of the second rotary mechanism part (80) are fluidly connected together by a communicating passageway (64), thereby forming a single expansion chamber (66). High-pressure refrigerant introduced into the first rotary mechanism part (70) expands in the expansion chamber (66). An injection passageway (37) is fluidly connected to the communicating passageway (64). When an motor-operated valve (90) is placed in the open state, high-pressure refrigerant is introduced into the expansion chamber (66) also from the injection passageway (37). This makes it possible to inhibit the drop in power recovery efficiency, even in the condition that causes the actual expansion ratio to fall below the design expansion ratio.Type: GrantFiled: March 4, 2005Date of Patent: March 9, 2010Assignee: Daikin Industries, Ltd.Inventors: Masakazu Okamoto, Michio Moriwaki, Eiji Kumakura, Tetsuya Okamoto, Katsumi Sakitani
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Publication number: 20100043481Abstract: An expander-compressor unit (10) includes a two-stage rotary expansion mechanism (3) having a first cylinder (41) and a second cylinder (42). In the expansion mechanism (3), a suction port (71) facing a working chamber on the upstream side in the first cylinder (41) and a discharge port facing a working chamber on the downstream side in the second cylinder (42) are formed. An intermediate plate (43) is provided between the first cylinder (41) and the second cylinder (42). In the intermediate plate (43), a communication passage (43a) for allowing communication between a working chamber on the downstream side in the first cylinder (41) and a working chamber on the upstream side in the second cylinder (42) is formed. The communication passage (43a) does not communicate with the working chamber in the first cylinder (41) during the suction process, and communicates with the downstream working chamber in the first cylinder (41) at or after the end of the suction process.Type: ApplicationFiled: February 22, 2008Publication date: February 25, 2010Applicant: PANASONIC CORPORATIONInventors: Takeshi Ogata, Hidetoshi Taguchi, Hiroshi Hasegawa, Yasufumi Takahashi, Atsuo Okaichi
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Patent number: 7641454Abstract: A two-stage rotary compressor includes a sealed cylindrical compressor housing that includes first, second and third communication holes separately arranged sequentially in an axial direction on an outer peripheral wall, an accumulator held on an outer side of the housing, a low-pressure connecting pipe that connects a bottom communication hole of the accumulator and the second communication hole, and an intermediate connecting pipe that connects the first and third communication holes. The second and third communication holes are arranged at nearly the same circumferential direction position of the housing. The accumulator is held at nearly the same circumferential direction position as the second communication hole.Type: GrantFiled: September 22, 2008Date of Patent: January 5, 2010Assignee: Fujitsu General LimitedInventors: Kenshi Ueda, Naoya Morozumi
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Patent number: 7632082Abstract: In a hermetically sealed compressor 100 including a rotary compressing element (4) having at least one cylinder (43A, 43B), and a roller (45) provided to the cylinder so as to be freely eccentrically rotatable, an electrically-driven element (2) for driving the roller (45) and a hermetically sealed container in which the rotary compressing element and the electrically-driven element are accommodated, oil (8) being stocked in the hermetically sealed container (1), the oil (8) in the hermetically sealed container (1) is injected into the compression chamber (43) when refrigerant is sucked into the compression chamber (43) of the cylinder.Type: GrantFiled: January 11, 2008Date of Patent: December 15, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Hirotsugu Ogasawara, Takahiro Nishikawa, Yoshihisa Kogure, Masayuki Hara, Hiroyuki Sawabe, Yoshiaki Hiruma
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Patent number: 7628592Abstract: In a compression/expansion unit (30) serving as a fluid machine, both a compression mechanism (50) and an expansion mechanism (60) are housed in a single casing (31). An oil supply passageway (90) is formed in a shaft (40) by which the compression mechanism (50) and the expansion mechanism (60) are coupled together. Refrigeration oil accumulated in the bottom of the casing (31) is drawn up into the oil supply passageway (90) and is supplied to the compression mechanism (50) and to the expansion mechanism (60). Surplus refrigeration oil, which is supplied to neither of the compression and expansion mechanisms (50) and (60), is discharged out of the terminating end of the oil supply passageway (90) which opens at the upper end of the shaft (40). Thereafter, the surplus refrigeration oil flows into an oil return pipe (102) from a lead-out hole (101) and is returned back towards a second space (39).Type: GrantFiled: March 9, 2005Date of Patent: December 8, 2009Assignee: Daikin Industries, Ltd.Inventors: Tetsuya Okamoto, Eiji Kumakura, Masakazu Okamoto, Michio Moriwaki, Katsumi Sakitani
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Patent number: 7621729Abstract: An object is to provide a high inner pressure type multistage compression rotary compressor capable of avoiding beforehand generation of vane fly of a second rotary compression element and realizing a stabilized operation, the rotary compressor includes a communication path which connects an intermediate pressure region to a region having a low pressure as a suction pressure of a first rotary compression element; and a valve device which opens or closes this communication path, the rotary compressor applies a high pressure as a back pressure of an upper vane, and this valve device opens the communication path in a case where a pressure difference between the intermediate pressure and the low pressure increases a predetermined upper limit value before the intermediate pressure reaches the high pressure.Type: GrantFiled: February 8, 2008Date of Patent: November 24, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Hiroyuki Matsumori, Takashi Sato, Takayasu Saito
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Patent number: 7611341Abstract: A capacity varying rotary compressor is provided. The compressor includes a casing that maintains a discharge pressure state, a motor installed in the casing that generates a driving force, one or more cylinder assemblies provided in the casing to compress refrigerant with a rolling piston and a vane. The rolling piston is eccentrically coupled to a rotation shaft of the motor to perform a linear motion, and a vane restricting device restricts or releases the vane from the rolling piston according to a difference in pressures applied to the vane. A structure of the compressor may be simplified, resulting in reduced production costs and enhanced productivity. Further, as the vane is restricted by a pressure differential, reliability may be enhanced.Type: GrantFiled: January 2, 2006Date of Patent: November 3, 2009Assignee: LG Electronics Inc.Inventors: Sang-Myung Byun, Kang-Wook Cha, Seoung-Yeon Cho
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Patent number: 7611343Abstract: An object is to provide a high inner pressure type multistage compression rotary compressor capable of avoiding beforehand generation of vane fly of a second rotary compression element and realizing a stabilized operation, the rotary compressor includes a communication path which connects an intermediate pressure region to a region having a low pressure as a suction pressure of a first rotary compression element; and a valve device which opens or closes this communication path, the rotary compressor applies a high pressure as a back pressure of an upper vane, and this valve device opens the communication path in a case where a pressure difference between the intermediate pressure and the low pressure increases a predetermined upper limit value before the intermediate pressure reaches the high pressure.Type: GrantFiled: February 8, 2008Date of Patent: November 3, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Hiroyuki Matsumori, Takashi Sato, Takayasu Saito
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Patent number: 7611342Abstract: An object is to provide a high inner pressure type multistage compression rotary compressor capable of avoiding beforehand generation of vane fly of a second rotary compression element and realizing a stabilized operation, the rotary compressor includes a communication path which connects an intermediate pressure region to a region having a low pressure as a suction pressure of a first rotary compression element; and a valve device which opens or closes this communication path, the rotary compressor applies a high pressure as a back pressure of an upper vane, and this valve device opens the communication path in a case where a pressure difference between the intermediate pressure and the low pressure increases a predetermined upper limit value before the intermediate pressure reaches the high pressure.Type: GrantFiled: February 8, 2008Date of Patent: November 3, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Hiroyuki Matsumori, Takashi Sato, Takayasu Saito
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Patent number: 7607902Abstract: A closed compressor includes a closed case in which a plurality of compression mechanism sections are accommodated, the compression mechanism section having a cylinder including a cylinder chamber eccentrically rotatably accommodating a roller, the compression mechanism section including a blade having a leading edge to divide the cylinder chamber into two parts along a direction in which the roller rotates, the compressor including a high-pressure refrigerant introducing mechanism guiding a high-pressure refrigerant into the cylinder chamber and separating the blade from the roller, the compressor being configured to switch between a high-capacity operation in which all the compression mechanism sections perform a compression operation and a low-capacity operation in which the blade in the compression mechanism section is separated from the roller and thus prevented from performing the compression operation, the high-pressure refrigerant introducing mechanism including a high-pressure refrigerant storage secType: GrantFiled: February 21, 2008Date of Patent: October 27, 2009Assignee: Toshiba Carrier CorporationInventor: Izumi Onoda
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Patent number: 7600986Abstract: There is provided an internal intermediate pressure multistage compression type rotary compressor capable of reducing a height dimension while reducing the amount of oil to be discharged outside. An electric element and first and second rotary compression elements which are driven by a rotary shaft of the electric element disposed under the electric element are provided in a hermetic shell case. There is provided a refrigerant introduction pipe for introducing refrigerant in the hermetic shell case over the electric element into the second rotary compression element through an outside of the hermetic shell case. There is provided an oil path provided in the rotary shaft for discharging oil through an oil discharge port which is positioned at the upper end of the rotary shaft. The refrigerant introduction pipe is provided such that a part of an inlet of the refrigerant introduction pipe is positioned under the upper end of a stator of the electric element.Type: GrantFiled: November 4, 2005Date of Patent: October 13, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matumoto, Haruhisa Yamasaki, Kazuya Sato, Masaya Tadano, Satoshi Imai, Akira Sugawara, Takashi Sato
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Patent number: 7597547Abstract: A rotary compressor having two different compression capacities is provided. The rotary compressor may include a driving shaft that is rotatable in both a clockwise and counterclockwise direction, and having an eccentric portion at an end thereof. The compressor may also include cylinder having a predetermined inner volume, and a roller rotatably installed on an outer circumferential portion of the eccentric portion so as to contact an inner circumference of the cylinder and form a fluid chamber therebetween. A vane is elastically installed in the cylinder and contacts the roller, and upper and lower bearings are respectively installed at upper and lower portions of the cylinder so as to rotatably support the driving shaft and hermetically seal the inner volume of the cylinder. Suction and discharge ports communicate with the fluid chamber based on a rotational direction of the driving shaft so as to provide a different compression capacity depending on the rotational direction of the driving shaft.Type: GrantFiled: May 3, 2004Date of Patent: October 6, 2009Assignee: LG Electronics Inc.Inventors: Sam Chul Ha, Ji Young Bae, Kyoung Jun Park, Chang Yong Jang, Hyeon Kim
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Patent number: 7588427Abstract: A rotary compressor that has two compression capacities is provided. The rotary compressor includes a driving shaft having an eccentric portion and being rotatable in both clockwise and counterclockwise directions, a cylinder having a predetermined inner volume, and a roller rotatably installed on an outer circumferential surface of the eccentric portion so as to contact an inner circumferential surface of the cylinder. The roller performs a rolling motion along the inner circumferential surface of the cylinder and forms a fluid chamber therewith. A vane is elastically installed in the cylinder, contacting the roller, and upper and lower bearings are respectively installed at upper and lower portions of the cylinder to rotatably support the driving shaft and hermetically seal the inner volume of the cylinder. A compression mechanism forms different sizes of compressive spaces in the fluid chamber based on a rotational direction of the driving shaft.Type: GrantFiled: May 3, 2004Date of Patent: September 15, 2009Assignee: LG Electronics Inc.Inventors: Ji Young Bae, Kyoung Jun Park, Chang Yong Jang, Hyeon Kim
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Patent number: 7585162Abstract: An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane.Type: GrantFiled: April 15, 2008Date of Patent: September 8, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Takahiro Nishikawa, Hirotsugu Ogasawara, Akihiro Suda, Masayuki Hara, Hiroyuki Sawabe, Hiroyuki Yoshida, Akira Hashimoto
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Patent number: 7585163Abstract: An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane.Type: GrantFiled: April 15, 2008Date of Patent: September 8, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Takahiro Nishikawa, Hirotsugu Ogasawara, Akihiro Suda, Masayuki Hara, Hiroyuki Sawabe, Hiroyuki Yoshida, Akira Hashimoto
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Patent number: 7572116Abstract: An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane.Type: GrantFiled: April 15, 2008Date of Patent: August 11, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Takahiro Nishikawa, Hirotsugu Ogasawara, Akihiro Suda, Masayuki Hara, Hiroyuki Sawabe, Hiroyuki Yoshida, Akira Hashimoto
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Patent number: 7563085Abstract: A compressor includes two rotary compressing elements in a vessel. One of the compressing elements operates while the other element is in a non-operating mode. In the non-operating mode, inflow of refrigerant gas into the cylinder of the rotary compressing element is blocked and a suction side pressure of the rotary compressing element is applied as a back pressure to a vane. A compressing system includes the compressor and a controller and operates in first and second operation modes. In the first operation mode, refrigerant gas flows into a cylinder and an intermediate pressure, a result of flow of the refrigerant gas from between a vane and a guide groove into a back pressure portion, between a suction side pressure and a discharge side pressure, is applied as a back pressure to bias the vane against a roller.Type: GrantFiled: March 14, 2005Date of Patent: July 21, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Masazumi Sakaniwa, Akira Hashimoto, Masayuki Hara, Takahiro Nishikawa, Hirotsugu Ogasawara, Akihiro Suda
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Patent number: 7540727Abstract: A capacity varying rotary compressor is provided. The compressor includes a cylinder mounted in a casing, and a vane pressure chamber provided at a rear side of a vane that divides an inner space of the cylinder into a suction chamber and a compression chamber. A pressure controlling unit supplies a discharge pressure or a suction pressure to the vane pressure chamber to thereby restrict or release a motion of the vane. A pressure leakage preventing unit couples the cylinder and bearings positioned at opposite sides of the cylinder to form the vane pressure chamber. A capacity to compress and discharge a refrigerant may be varied according to a load, thereby reducing power consumption of the compressor and simplifying assembly. Furthermore, pressure leakage from the vane pressure chamber may be prevented, thereby enhancing a capacity varying function.Type: GrantFiled: January 2, 2006Date of Patent: June 2, 2009Assignee: LG Electronics Inc.Inventors: Sang-Myung Byun, Kang-Wook Cha, Seoung-Yeon Cho, Jin-Soo Kim, Geun-Hyoung Lee
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Patent number: 7524174Abstract: An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane.Type: GrantFiled: July 6, 2005Date of Patent: April 28, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Takahiro Nishikawa, Hirotsugu Ogasawara, Akihiro Suda, Masayuki Hara, Hiroyuki Sawabe, Hiroyuki Yoshida, Akira Hashimoto
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Publication number: 20090104060Abstract: In a compressor provided with two compression mechanisms of a rotary type compression mechanism and a scroll type compression mechanism, torque fluctuations are reduced. The compressor 1 includes a hermetic housing 2, a low stage-side compression mechanism 3 and a high stage-side compression mechanism 4 provided in the hermetic housing 2; and an electric motor 21 for driving the low stage-side compression mechanism 3 and the high stage-side compression mechanism 4. The low stage-side compression mechanism 3 is a rotary type compression mechanism, and the high stage-side compression mechanism 4 is a scroll type compression mechanism. The suction shutoff of the scroll type compression mechanism is accomplished when a rotor 34 of the rotary type compression mechanism is at a position A corresponding to the bottom dead center, at a position B of being rotated through 90 degrees from the bottom dead center, or between the positions A and B.Type: ApplicationFiled: October 15, 2008Publication date: April 23, 2009Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hajime SATO, Yoshiyuki KIMATA
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Publication number: 20090104062Abstract: There is provided a compressor capable of feeding lubricating oil to a blade of a rotary type compression mechanism even if the oil level in an oil reservoir lowers. The compressor 1 includes a low stage-side rotary type compression mechanism 3 having a rotor 34, and a blade 38 reciprocating with the rotation of the rotor 34 while the tip end thereof is in contact with the rotor 34; a high stage-side scroll type compression mechanism 4 for sucking and compressing refrigerant gas compressed by the low stage-side rotary type compression mechanism 3; a positive displacement lubrication pump 60 for feeding lubricating oil 27 to the high stage-side scroll type compression mechanism 4; and an oil feeding path for feeding the lubricating oil 27, which is fed to the high stage-side scroll type compression mechanism 4, toward the blade 38 of the low stage-side rotary type compression mechanism 3.Type: ApplicationFiled: October 14, 2008Publication date: April 23, 2009Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kazuya Kondo, Hajime Sato, Yoshiyuki Kimata
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Patent number: 7520733Abstract: There is provided an internal intermediate pressure multistage compression type rotary compressor capable of reducing a height dimension while reducing the amount of oil to be discharged outside. An electric element and first and second rotary compression elements which are driven by a rotary shaft of the electric element disposed under the electric element are provided in a hermetic shell case. There is provided a refrigerant introduction pipe for introducing refrigerant in the hermetic shell case over the electric element into the second rotary compression element through an outside of the hermetic shell case. There is provided an oil path provided in the rotary shaft for discharging oil through an oil discharge port which is positioned at the upper end of the rotary shaft. The refrigerant introduction pipe is provided such that apart of an inlet of the refrigerant introduction pipe is positioned under the upper end of a stator of the electric element.Type: GrantFiled: November 4, 2005Date of Patent: April 21, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matumoto, Haruhisa Yamasaki, Kazuya Sato, Masaya Tadano, Satoshi Imai, Akira Sugawara, Takashi Sato
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Patent number: 7491042Abstract: An object is to provide a high inner pressure type multistage compression rotary compressor capable of avoiding beforehand generation of vane fly of a second rotary compression element and realizing a stabilized operation, the rotary compressor includes a communication path which connects an intermediate pressure region to a region having a low pressure as a suction pressure of a first rotary compression element; and a valve device which opens or closes this communication path, the rotary compressor applies a high pressure as a back pressure of an upper vane, and this valve device opens the communication path in a case where a pressure difference between the intermediate pressure and the low pressure increases a predetermined upper limit value before the intermediate pressure reaches the high pressure.Type: GrantFiled: December 14, 2006Date of Patent: February 17, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Hiroyuki Matsumori, Takashi Sato, Takayasu Saito
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Patent number: 7462021Abstract: An object is to provide a rotary compressor capable of reducing an oil discharge amount to the outside, and there is provided a vertical rotary compressor constituted by housing an electromotive element and a rotary compression mechanism section driven by the electromotive element in an airtight container, wherein an oil separation mechanism for centrifugally separating oil in a refrigerant which has been compressed by the rotary compression mechanism section and discharged is disposed in a space between the airtight container and the rotary compression mechanism section in the airtight container.Type: GrantFiled: September 22, 2004Date of Patent: December 9, 2008Assignee: Sanyo Electric Co., Ltd.Inventors: Toshiyuki Ebara, Hiroyuki Matsumori, Takashi Sato, Dai Matsuura, Takayasu Saito
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Patent number: 7438540Abstract: In a two-stage rotary compressor of the present invention, an oil supply hole connecting an oil reservoir on a bottom portion in a closed vessel to a suction port formed in a lower supporting member is provided in the lower supporting member attached to the lower side of a high stage side rotary compressing element, and a necessary amount of oil is supplied into return refrigerant gas sucked into the high stage side rotary compressing element through this oil supply hole. Thus an outer circumferential surface of a roller, which eccentrically rotates in a cylinder, is lubricated to protect it from wear. Additionally, the gas seal properties between an inner circumferential surface of the cylinder and an outer circumferential surface of the roller and between a roller end surface and a partition plate and between a roller end surface and a cylinder end surface, are increased whereby the compression efficiency of the refrigerant gas can be improved.Type: GrantFiled: September 27, 2007Date of Patent: October 21, 2008Assignee: Sanyo Electric Co., Ltd.Inventor: Kazuya Sato
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Publication number: 20080213116Abstract: A multi-stage rotary compressor comprises: a casing having a sealed space therein; a driving unit installed in the casing, for generating a driving force; a first compression unit and a second compression unit for receiving the driving force from the driving unit and compressing a refrigerant; and a connection unit for connecting the first and second compression units and guiding the refrigerant discharged from the second compression unit to be sucked directly in the first compression unit and then re-compressed, by which it is possible to vary capacity, even using every plurality of compression units, and to obtain power saving effect suitable for a saving mode.Type: ApplicationFiled: December 14, 2004Publication date: September 4, 2008Inventors: Young-Ju Bae, Seung-Jun Lee, Joon-Hong Park, Kang-Wook Cha, Seung-Mun An
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Publication number: 20080206082Abstract: A closed compressor includes a closed case in which a plurality of compression mechanism sections are accommodated, the compression mechanism section having a cylinder including a cylinder chamber eccentrically rotatably accommodating a roller, the compression mechanism section including a blade having a leading edge to divide the cylinder chamber into two parts along a direction in which the roller rotates, the compressor including a high-pressure refrigerant introducing mechanism guiding a high-pressure refrigerant into the cylinder chamber and separating the blade from the roller, the compressor being configured to switch between a high-capacity operation in which all the compression mechanism sections perform a compression operation and a low-capacity operation in which the blade in the compression mechanism section is separated from the roller and thus prevented from performing the compression operation, the high-pressure refrigerant introducing mechanism including a high-pressure refrigerant storage secType: ApplicationFiled: February 21, 2008Publication date: August 28, 2008Applicant: TOSHIBA CARRIER CORPORATIONInventor: Izumi Onoda
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Patent number: 7381039Abstract: A rotary compressor including upper and lower cylinders constituting first and second rotary compression elements; a lower support member which closes an opening of the lower cylinder and which has a bearing as a bearing portion of a rotation shaft; a discharge muffler chamber formed by depressing an outer surface of the bearing of the lower support member on the side opposite to the lower cylinder to close the depressed portion with a lower cover; an O-ring groove formed in the surface of the bearing which abuts on the lower cover; an O-ring stored in the O-ring groove; and a gasket disposed between the lower support member. The lower cover in an outer peripheral portion of the lower support member, and the surface of the lower cover on the side of the lower support member, is provided with a stepped portion to absorb a thickness of the gasket.Type: GrantFiled: January 31, 2006Date of Patent: June 3, 2008Assignee: Sanyo Electric Co., Ltd.Inventor: Kazuya Sato
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Patent number: 7377755Abstract: A multi-stage rotary compressor to reduce a driving load and prevent a malfunction due to an abrupt pressure rising. In the compressor of the type including first and second compressing units mounted in a hermetic casing thereof to compress a gas, the gas being primarily compressed in the first compressing unit and secondarily compressed in the second compressing unit, the interior of the hermetic casing is divided into a plurality of spaces including first and second pressure chambers. The first pressure chamber surrounds the first compressing unit and is kept at a discharge pressure of the first compressing unit, and the second pressure chamber surrounds the second compressing unit and is kept at a discharge pressure of the second compressing unit.Type: GrantFiled: July 25, 2005Date of Patent: May 27, 2008Assignee: Samsung Electronics Co., Ltd.Inventor: Sung Oug Cho
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Patent number: 7303379Abstract: An object is to execute sure oil supplying to a second rotary compression element in a horizontal type compressor equipped with the second rotary compression element in which pressure becomes higher than that in an airtight container. A horizontal type rotary compressor of a multistage compression system comprises a driving element and a compression mechanism section driven by the driving element in a horizontal type airtight container. The compression mechanism section is constituted of first and second rotary compression elements. A refrigerant compressed by the first rotary compression element is discharged into the airtight container, and the discharged refrigerant of intermediate pressure is further compressed by the second rotary compression element to be discharged. A gist is that an oil supply passage is formed in a cylinder of the second rotary compression element 34 to communicate a low-pressure chamber of the cylinder with a bottom part in the airtight container.Type: GrantFiled: June 23, 2004Date of Patent: December 4, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Toshiyuki Ebara, Hiroyuki Matsumori, Takashi Sato, Dai Matsuura, Takayasu Saito
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Patent number: 7290994Abstract: A vane of a first cylinder is compressed and urged by a spring member. A vane of a second cylinder is compressed and urged corresponding to a differential pressure between an intra-casing pressure guided into a vane chamber and a suction pressure or discharge pressure guided to the cylinder chamber. A pressure shift mechanism which guides the suction pressure or discharge pressure has a branch pipe having a one end connected to a high pressure side of the refrigeration cycle, an other end connected to a suction pipe, and a first on-off valve in a midway portion, and a second on-off valve or a check valve which is provided in the suction pipe on a side upstream of a connection portion of the branch pipe and on a side downstream of an oil returning opening in an accumulator.Type: GrantFiled: December 14, 2005Date of Patent: November 6, 2007Assignee: Toshiba Carrier CorporationInventors: Shoichiro Kitaichi, Norihisa Watanabe, Takeshi Tominaga, Kazu Takashima, Isao Kawabe, Masayuki Suzuki
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Patent number: 7252487Abstract: In a high inner pressure type multistage compression system rotary compressor whose object is to improve sealability of a first rotary compression element and which includes a second rotary compression element having a displacement volume being smaller than that of the first rotary compression element and in which a refrigerant compressed by the first rotary compression element is compressed by the second rotary compression element to discharge the refrigerant into a sealed container, heights of a first cylinder of the first rotary compression element and a second cylinder of the second rotary compression element are set to be equal, diameters of both of eccentric portions are set to be equal, an inner diameter of the first cylinder is set to be larger than that of the second cylinder, and a thickness of a first roller is set to be larger than that of a second roller.Type: GrantFiled: February 14, 2006Date of Patent: August 7, 2007Assignee: Sanyo Electric Co., Ltd.Inventor: Kazuya Sato
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Patent number: 7223082Abstract: A so-called internal intermediate pressure multistage compression type rotary compressor makes it possible to prevent the pressure inside a roller from inconveniently increasing and also to permit smooth and reliable supply of oil into a cylinder of a second rotary compressing element by a relatively simple construction. A lubrication groove for providing communication between an oil bore and a low-pressure chamber in the cylinder is formed in a surface of an intermediate partitioner that is adjacent to the cylinder of the second rotary compressing element. Furthermore, a through bore for providing communication between a hermetically sealed vessel and the inside of the roller is formed in the intermediate partitioner.Type: GrantFiled: February 3, 2004Date of Patent: May 29, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Kazuya Sato, Kenzo Matsumoto, Kentaro Yamaguchi, Akifumi Tomiuka, Hiromasa Aoki, Midori Futakawame
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Patent number: 7220110Abstract: A refrigerant cycling device is provided, wherein a compressor comprises an electric motor element, a first and a second rotary compression elements in a sealed container. The first and the second rotary compression elements are driven by the electric motor element. The refrigerant compressed and discharged by the first rotary compression element is compressed by absorbing into the second rotary compression element, and is discharged to the gas cooler.Type: GrantFiled: March 2, 2005Date of Patent: May 22, 2007Assignee: SANYO Electric Co., Ltd.Inventors: Kenzo Matsumoto, Kazuya Sato, Kentaro Yamaguchi, Kazuaki Fujiwara, Masaji Yamanaka, Haruhisa Yamasaki
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Patent number: 7101161Abstract: An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio while preventing the compressor from being increased in size. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness (or height), and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration.Type: GrantFiled: August 11, 2004Date of Patent: September 5, 2006Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Haruhisa Yamasaki, Masaya Tadano, Kazuya Sato, Dai Matsuura, Takayasu Saito, Noriyuki Tsuda
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Patent number: 7101162Abstract: A refrigerant cycling device is provided, wherein a compressor comprises an electric motor element, a first and a second rotary compression elements in a sealed container. The first and the second rotary compression elements are driven by the electric motor element. The refrigerant compressed and discharged by the first rotary compression element is compressed by absorbing into the second rotary compression element, and is discharged to the gas cooler.Type: GrantFiled: March 2, 2005Date of Patent: September 5, 2006Assignee: SANYO Electric Co., Ltd.Inventors: Kenzo Matsumoto, Kazuya Sato, Kentaro Yamaguchi, Kazuaki Fujiwara, Masaji Yamanaka, Haruhisa Yamasaki
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Patent number: 7008199Abstract: An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio while preventing the compressor from being increased in size. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness (or height), and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration.Type: GrantFiled: August 11, 2004Date of Patent: March 7, 2006Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Haruhisa Yamasaki, Masaya Tadano, Kazuya Sato, Dai Matsuura, Takayasu Saito, Noriyuki Tsuda
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Patent number: 6974314Abstract: An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio while preventing the compressor from being increased in size. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness (or height), and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration.Type: GrantFiled: August 11, 2004Date of Patent: December 13, 2005Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Haruhisa Yamasaki, Masaya Tadano, Kazuya Sato, Dai Matsuura, Takayasu Saito, Noriyuki Tsuda
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Patent number: 6892454Abstract: A method for manufacturing a multi-stage compression type rotary compressor which avoids the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio between first and second rotary compression elements without increasing the size of the compressor outer housing. This is done by altering the inner diameter of the cylinder of one of the rotary compression elements without altering the thickness (or height) of this cylinder to set a displacement volume ratio between the first and second rotary compression elements to an optimum value in accordance with the alteration.Type: GrantFiled: November 27, 2002Date of Patent: May 17, 2005Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Haruhisa Yamasaki, Masaya Tadano, Kazuya Sato, Dai Matsuura, Takayasu Saito, Noriyuki Tsuda
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Patent number: 6824367Abstract: A multi-stage compression type rotary compressor 10 is provided with an electrical-power element 14, the first and second rotary compression elements 32, 34 driven by a rotary shaft 16 of the electrical-power element 14 in a sealed vessel 12. The refrigerant compressed by the first rotary compression element 32 is compressed by the second rotary compression element 34. The refrigerant is combustible. The refrigerant compressed by the first rotary compression element 32 is discharged to the sealed vessel 12. The discharged medium pressure refrigerant is compressed by the second rotary compression element 34. Additionally, the displacement volume ratio of the second rotary compression element 34 to the first rotary compression element 32 is set not less than 60% and not more than 90%. By using the multi-stage compression type rotary compressor, a rotary compressor using a combustible refrigerant can be carried out.Type: GrantFiled: August 22, 2003Date of Patent: November 30, 2004Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Kazuaki Fujiwara, Haruhisa Yamasaki, Yoshio Watabe, Kentaro Yamaguchi, Noriyuki Tsuda, Masaji Yamanaka, Kazuya Sato