Patents Assigned to Hitachi Appliances, Inc.
-
Publication number: 20140234148Abstract: A scroll compressor configures suction and compression rooms between fixed and orbiting scrolls, includes a back pressure room at the orbiting scroll base plate back face, and is configured in an asymmetric tooth shape. A fluid outflow path for an orbiting scroll lap external line side compression room and a fluid outflow path for an internal line side compression room are configured on an orbiting scroll base plate, and outlet side openings of the respective fluid outflow paths are opened to an orbiting lap tooth bottom. Inlet side openings of the respective fluid outflow paths are opened to the orbiting scroll base plate face sliding with the fixed scroll, and a fixed scroll base plate face is configured with a communicating section control groove for intermittently communicating the inlet side openings of the respective fluid outflow paths and the back pressure room in accordance with an orbiting movement.Type: ApplicationFiled: February 11, 2014Publication date: August 21, 2014Applicant: Hitachi Appliances, Inc.Inventors: Hiromu TAKEDA, Masaru OHTAHARA, Shoji MATSUMURA, Masashi MIYAKE
-
Patent number: 8786155Abstract: When an axial gap rotating electrical machine is assembled, stator cores are accurately positioned and a manufacturing process therefor is simplified. The axial gap rotating electrical machine comprises: a housing frame body having a first space in the cylindrical central part thereof and multiple second spaces located in the circumferential direction which have the same distances from the center; a shaft rotatably provided in the first space in the housing frame body; a core placed in each of the second spaces in the housing frame body and a coil arranged around the core; a rotor yoke fixed on the shaft, extended in the direction of the circumference thereof, and having multiple magnets arranged in circumferential positions confronting the cores; and a case having a hole for the shaft and housing the housing frame body and the rotor yoke.Type: GrantFiled: August 16, 2011Date of Patent: July 22, 2014Assignees: Hitachi Appliances, Inc., Hitachi Metals, Ltd., Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Zhuonan Wang, Yuji Enomoto, Motoya Ito, Ryoso Masaki, Hiromitsu Itabashi, Baiying Huang
-
Patent number: 8747086Abstract: A scroll compressor is constructed by combining a stationary scroll and an orbiting scroll formed by erecting a scroll-shape wrap upright on a base plate meshing with each other. A scroll member constructing the stationary scroll or the orbiting scroll is constructed of an inner layer member 601 forming a core metal and an outer layer member 600 arranged so as to surround the inner layer member and forming an outer layer part, the inner layer member is constructed of a material with higher modulus of elasticity than that of the outer layer member, and separation prevention parts (uneven parts 603, depressions 604, or holes 605) preventing the inner layer member and the outer layer member from separating with each other due to difference in coefficient of thermal expansion thereof are arranged in the inner layer member.Type: GrantFiled: October 28, 2010Date of Patent: June 10, 2014Assignee: Hitachi Appliances, Inc.Inventors: Masatsugu Chikano, Kazuo Sakurai, Mutsunori Matsunaga, Satoshi Nakamura
-
Patent number: 8740594Abstract: A scroll compressor includes a fixed scroll, an orbiting scroll, a crankshaft rotationally supported on a frame to drive the orbiting scroll, a seal member between an orbiting scroll back surface and the frame, a back pressure chamber of discharge pressure at an inner peripheral side of the seal member, another back pressure chamber of low pressure at an outer peripheral side so that the orbiting scroll is pressed against the fixed scroll with the pressures of these back pressure chambers, and a guide ring supporting an end surface of the seal member at a side opposite to the orbiting scroll and including a guide portion guiding an inner peripheral surface of the seal member so that the seal member is brought into close contact with the orbiting scroll back surface by a wave spring through the guide ring.Type: GrantFiled: December 6, 2011Date of Patent: June 3, 2014Assignee: Hitachi Appliances, Inc.Inventors: Satoshi Nakamura, Mutsunori Matsunaga, Takeshi Tsuchiya, Yuuichi Yanagase, Masatsugu Chikano
-
Patent number: 8713960Abstract: An ice supplying apparatus, being provided in a refrigerator, includes an ice maker unit, which is configured to supply ice pieces produced therein to an outside of a freezer room door; an ice storage unit, which is configured to store the ice pieces produced by the ice maker unit; an ice discharger unit, which is provided within the ice storage unit to discharge the ice pieces below; and a shrinking portion, which is provided in the ice storage unit and defines an interior space thereof as small as it goes down, through building up a lower surface, among interior surfaces defining that interior space of the ice storage unit, for supporting the ice pieces stored therein from a lower portion thereof, by a surface inclining to a horizontal direction, wherein the ice discharger unit is disposed in a lower portion of the shrinking portion.Type: GrantFiled: August 1, 2012Date of Patent: May 6, 2014Assignee: Hitachi Appliances, Inc.Inventors: Katsutoshi Shinohara, Kenji Shiono, Shintaro Yamawaki, Taichiro Yamashita, Yasuo Kurihara
-
Publication number: 20140119971Abstract: A suction chamber and the oil injection port are linked, under a certain range of revolution angle, via a suction working chamber formed in the radially outer side by a orbiting scroll outer curve and a fixed scroll inner curve under a certain range of revolution angle. An opening of the oil injection port is provided on a bottom surface between teeth of the fixed scroll so that the suction working chamber formed, in a radially inner side, by a orbiting scroll inner curve and a fixed scroll outer curve and the suction chamber are positioned not to be linked with the oil injection port.Type: ApplicationFiled: October 30, 2013Publication date: May 1, 2014Applicant: Hitachi Appliances, Inc.Inventors: Masao SHIIBAYASHI, Yasushi IZUNAGA, Takamasa ADACHI
-
Patent number: 8628306Abstract: Helium enclosed compressor. A compressor and a motor section with stator having coil ends and a rotor, are housed within an enclosed vessel partitioned into discharge and motor chambers by a frame. The compressor section has a stationary scroll having a spiral wrap standing upright at a disk-like panel and an orbiting scroll having a spiral wrap standing upright at a disk-like panel, made to mesh with each other while their wraps face the inside. The orbiting scroll sucks helium gas from a suction port of an outer peripheral portion of the stationary scroll, and discharges helium gas into the discharge chamber from a discharge port of a central portion of the stationary scroll. An inverter controls a number of rotations of the motor section, wherein a plurality of varnish-treated layers which becomes insulating films is formed on the surface of a coil which constitutes the coil ends.Type: GrantFiled: May 15, 2012Date of Patent: January 14, 2014Assignee: Hitachi Appliances, Inc.Inventors: Masao Shiibayashi, Takao Mizuno
-
Publication number: 20140010693Abstract: A scroll compressor contains a suction chamber and a compression chamber formed between the orbiting scroll and stationary scroll; and the rear surface of the orbiting scroll includes a back pressure chamber to apply a pressing force for pressing the stationary scroll to the orbiting scroll by the pressure higher than the pressure in the suction chamber. The stationary scroll contains the communication paths 200, 201 to connect the suction chamber or the compression chamber and the back pressure chamber; and a back pressure control means for opening and closing the communication paths by way of the pressure differential along the communication paths. The inlet communication path 200 that extends from the back pressure control means to the back pressure chamber includes at least two or more path cross-sectional areas.Type: ApplicationFiled: March 29, 2011Publication date: January 9, 2014Applicant: Hitachi Appliances ,Inc.Inventors: Kouichi Imada, Mutsunori Matsunaga, Takeshi Tsuchiya, Shuji Hasegawa, Yoshihiro Fukaya, Hiromu Takeda, Masatsugu Chikano
-
Publication number: 20130219950Abstract: A compressor is provided with a fixed scroll having a spiral lap erected on a bed plate; an orbiting scroll having a spiral lap erected on a panel and forming a compression room meshed with the fixed scroll; and an orbiting bearing disposed penetrating the panel and the central part of the lap of the orbiting scroll, wherein a lap center is so shifted from a panel center out of alignment in a direction in which, within a range in which the orbiting bearing can be formed in the central part of the lap, the longer of the minimum distance between the lap winding end position of the orbiting scroll and the outer circumference of the panel and the minimum distance between the outermost circumferential part and the outer circumference of the panel in an approximately 90° direction of becomes the shortest distance.Type: ApplicationFiled: February 19, 2013Publication date: August 29, 2013Applicant: HITACHI APPLIANCES, INC.Inventor: Hitachi Appliances, Inc.
-
Publication number: 20130216416Abstract: The lap shapes of a fixed scroll and an orbiting scroll are configured in an asymmetric tooth profile. In the bed plate of an orbiting scroll, a fluid effluence channel communicating with an external line side compression room of an orbiting scroll lap and another fluid effluence channel communicating with an internal line side compression room are formed, and the outlet side opening of each fluid effluence channel opens in the lap tooth bottom of the orbiting scroll, and inlet side openings are formed in a face of the bed plate that is in sliding contact with the bed plate face of the fixed scroll. In the face of the bed plate, a communicating section control groove that lets the inlet side openings of the two fluid effluence channels and the back pressure room intermittently communicate with each other.Type: ApplicationFiled: February 11, 2013Publication date: August 22, 2013Applicant: HITACHI APPLIANCES, INC.Inventor: HITACHI APPLIANCES, INC.
-
Publication number: 20130195707Abstract: The invention provides a refrigerant compressor that is capable of preventing seizure or galling at the bearing slide section and has high anti-wear properties. The refrigerant compressor includes a compressor mechanism for compressing a refrigerant. The compressor mechanism includes a fixed scroll 100 and an orbiting scroll 200, and the two scrolls are mutually meshed. The refrigerant compressor also includes a rotary shaft 300 for driving the compressor mechanism. A plain bearing(s) is/are provided either at the joint section between the rotary shaft and the compressor mechanism or at the support section supporting the rotary shaft or at both of the two sections. The plain bearing(s) is/are formed of lead-free resin-impregnated material capable of adsorbing wear particles, and the rotary shaft is formed of iron material. The section of the rotary shaft that slides against the plain bearing(s) is covered with a hard film 1000 of a hardness of 1000 Hv or more.Type: ApplicationFiled: August 8, 2011Publication date: August 1, 2013Applicant: Hitachi Appliances, Inc.Inventors: Yuko Kozuma, Mutsunori Matsunaga, Kouiti Imada, Yuichi Yanagase
-
Patent number: 8435014Abstract: In the hermetically sealed scroll compressor, an injection pipe for injecting a fluid to a compression chamber is connected to an injecting port of a fixed scroll. The injecting port includes a first injecting port which is provided in the vicinity of a fixed scroll inner curve and injects the fluid to an orbiting outer compression chamber, and a second injecting port 22b which is provided in the vicinity of a fixed scroll outer curve and injects the fluid to a orbiting inner compression chamber 8b. The second injecting port is placed in parallel in a radius direction with respect to the first injecting port and is placed so that an orbiting scroll wrap does not practically communicate with the orbiting outer compression chamber in the state in which the orbiting scroll wrap is in contact with the outer side of a fixed scroll wrap.Type: GrantFiled: February 28, 2012Date of Patent: May 7, 2013Assignee: Hitachi Appliances, Inc.Inventors: Masao Shiibayashi, Kenji Tojo, Yasushi Izunaga
-
Patent number: 8405272Abstract: There is provided a self-starting permanent magnet synchronous motor in which a center axis of magnetic poles of a rotor is assumed to be a d axis, an axis deviated from the magnetic pole center axis by an electric angle of 90 degrees is assumed to be a q axis, at least two or more starting bars which are arranged near the d axis are arranged on a bore side of the bars near the q axis and are arranged in parallel with the q axis, so that a stable starting torque can be generated irrespective of a generating position of a stator magnetic flux which changes due to applying timing of a power source and a phase of a voltage, and a vibration/noises at the time of a stationary operation can be reduced.Type: GrantFiled: August 5, 2010Date of Patent: March 26, 2013Assignee: Hitachi Appliances, Inc.Inventors: Satoshi Kikuchi, Hiroyuki Mikami, Tomio Yoshikawa, Baiying Huang, Hideyuki Kumakura
-
Patent number: 8373326Abstract: An axial gap motor includes a stator having stator teeth, and also includes a rotor opposed to the stator with a gap in an axial direction of the stator. Each of the stator teeth includes a stator tooth body, a stator tooth end joined to at least one axial-direction end of the stator tooth body, and a stator coil disposed around the stator tooth body. The stator tooth body includes a wound core comprised of a multi-layered amorphous foil strip winding. The stator tooth end is formed by a compact including a powder magnetic core, and the stator tooth end includes a surface opposed to the rotor. A cross-sectional area of the stator tooth end perpendicular to an axis of the amorphous foil strip winding is larger than a cross-sectional area of the stator tooth body perpendicular to the axis of the amorphous foil strip winding.Type: GrantFiled: October 22, 2010Date of Patent: February 12, 2013Assignees: Hitachi Metals, Ltd., Hitachi Appliances, Inc.Inventors: Yuji Enomoto, Zhuonan Wang, Ryoso Masaki, Hiromitsu Itabashi, Kazumasa Ide
-
Publication number: 20120319630Abstract: The present invention offers a three-phase converter which conforms to the higher harmonics regulations.Type: ApplicationFiled: March 31, 2010Publication date: December 20, 2012Applicants: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD., HITACHI APPLIANCES, INC.Inventors: Dongsheng Li, Yasuo Notohara
-
Publication number: 20120301334Abstract: In a conventional compressor, since a motor and a mechanical section of the compressor are disposed in one and the same closed container, the motor is exposed to high-temperature coolant and heated, and the efficiency of the motor is lowered. Further, during the operation of the compressor, the coolant circulating in the refrigerating cycle conveys additional heat generated by the motor coil. Thus the efficiency of the refrigerating cycle is lowered. The compressor according to the present invention includes a compression chamber divided into a closed chamber and an open chamber separated by a magnetic induction plate from each other. The closed chamber is filled with high temperature and pressure coolant and the rotor of the motor is disposed in the closed chamber, and the stator of the motor is disposed in the open chamber.Type: ApplicationFiled: May 24, 2012Publication date: November 29, 2012Applicant: Hitachi Appliances, Inc.Inventors: Baiying HUANG, Hiroyasu YONEYAMA, Kazuo SAKURAI
-
Publication number: 20120294748Abstract: A sealed scroll compressor for helium having a stationary scroll, an orbiting scroll, and an oil-injection mechanism. The oil-injection mechanism has an oil-injection pipe arranged to pass through a sealed container and connected to an oil-injection port, and the opening of the oil-injection port is arranged at a bottom surface of a groove between ridges formed with the scroll wrap of the stationary scroll in such a manner that a first range of the orbital angle of the orbiting scroll is approximately identical to a second range of the orbital angle of the orbiting scroll, where the oil-injection port is connected to the outer compression chamber while the orbital angle of the orbiting scroll is in the first range, and is connected to the inner compression chamber while the orbital angle of the orbiting scroll is in the second range.Type: ApplicationFiled: May 16, 2012Publication date: November 22, 2012Applicant: Hitachi Appliances, Inc.Inventors: Masao Shiibayashi, Yasushi Izunaga, Takamasa Adachi
-
Publication number: 20120247139Abstract: A screw compressor includes a valve hole formed at a discharge side end surface of a discharge casing and at a position opening to a compression work chamber; a bypass flow path having the valve hole and a discharge chamber communicate with each other; and a valve body arranged in the valve hole. The screw compressor also includes cylinder chambers provided on a rear surface side of the valve body; a piston reciprocally moving in the cylinder chambers; a rod connecting the piston and the valve body; communication paths for introducing a fluid on a discharge side into the cylinder chamber on a side opposite to a valve body side of the piston and on the valve body side; a pressure discharge path; a plurality of valve means; and a controller controlling the plurality of valves means.Type: ApplicationFiled: January 10, 2012Publication date: October 4, 2012Applicant: Hitachi Appliances, Inc.Inventors: Ryuichiro Yonemoto, Eisuke Kato, Masayuki Urashin, Shinichiro Yamada
-
Publication number: 20120230854Abstract: A scroll compressor with high efficiency is provided according to the present invention. The scroll compressor compresses a refrigerant by meshing of an orbiting scroll and a fixed scroll, wherein the orbiting scroll includes a back pressure hole which intermittently connects a compression chamber and a back pressure chamber per one orbit of the orbiting scroll, and the back pressure hole communicates with the compression chamber and also with the back pressure chamber and shuts off the communication with the back pressure chamber after the communication with the compression chamber is shut off.Type: ApplicationFiled: January 31, 2012Publication date: September 13, 2012Applicant: Hitachi Appliances, Inc.Inventors: Masatsugu CHIKANO, Mutsunori Matsunaga, Takeshi Tsuchiya, Eiji Sato, Yuichi Yanagase
-
Publication number: 20120230853Abstract: In a scroll compressor, it is hard to zone a high pressure chamber and a back pressure chamber which are formed in a back face of an orbiting scroll by a sealing means, increase a feeding amount to the high pressure chamber and the back pressure chamber at a low speed and adjust it at a high speed. A sealing means sealing a high pressure chamber in a center portion of a back face of an orbiting scroll and a back pressure chamber formed by an outer peripheral portion is provided, and a spiral shaped throttle passage is provided between a boss portion in the back face of the orbiting scroll and an outer peripheral surface of an orbiting bearing, thereby constructing an oil feeding route for feeding a lubricating oil to the back pressure chamber from the high pressure chamber.Type: ApplicationFiled: February 14, 2012Publication date: September 13, 2012Applicant: Hitachi Appliances, Inc.Inventors: Yuichi YANAGASE, Isamu Tsubono, Eiji Sato, Masatsugu Chikano, Takeshi Tsuchiya, Mutsunori Matsunaga