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1. 发明专利

JPH06317266A OIL FEEDER FOR SEALED SCROLL COMPRESSOR 失效
公开(公告)号：JPH06317266A
公开(公告)日：1994-11-15
申请号：JP10840093
申请日：1993-05-10
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： IMAMURA HIROYUKI , TAMURA TAKAHIRO , SAKURAI KAZUO
IPC分类号： F04C18/02 , F04C29/00 , F04C29/02 , F04C29/12
摘要： PURPOSE:To absorb an installation error in the perpendicular direction to the driving shaft direction, and stabilize oil feed to a bearing by setting a height of a pedestal in which a spherical slide bearing is inserted higher than a bearing part, and setting an inside diameter of the pedestal larger than an inside diameter of a connecting part. CONSTITUTION:When a driving shaft 7 is rotated by an electric motor 3, a turning scroll 5 is turned by rotation of a crank pin 7a and an action of an autorotation preventive mechanism 9 without making autorotation. As a result, capacity of space defined by respective laps 5b and 6b of the turning scroll 5 and a fixed scroll 6 and respective base plates 5a and 6a is reduced, and gas is sucked from a suction hole 6c, and is delivered from a delivery hole 6d after it is compressed. In this case, oil is introduced to an oil feeding hole 7c of the driving shaft 7 from an oil separator through an oil feeding pipe 15 and an oil feeding pipe joint 13 having spherical slide bearings 10 and 12 on both ends. A pedestal 16 is connected to the spherical slide bearing 12, and a height and an inside diameter of the pedestal 16 are set heigher and larger than the spherical slide bearing 12.

2. 发明专利

JPH06173875A RUNNING FOR A PLURALITY OF COMPRESSORS 失效
公开(公告)号：JPH06173875A
公开(公告)日：1994-06-21
申请号：JP33270192
申请日：1992-12-14
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： YAMAZAKI NORIYUKI , TAMURA TAKAHIRO , SAKURAI KAZUO , IMAMURA HIROYUKI
IPC分类号： F04C18/02 , F04B39/02 , F04B39/12 , F04C23/00 , F04C28/02 , F04C29/00 , F04C29/02 , F04C29/12 , F04C29/10
摘要： PURPOSE:To prevent the increase of the input caused by oil stirred by a rotor of a motor when an oil amount in an oil reservoir container is not reduced and an compressor under stopped condition is started in the case of plural refrigerant compressors installed by returning oil remaining in the stopped compressor to the oil reservoir container. CONSTITUTION:A plurality of refrigerant compressors having pressure in a casing as discharge pressure are combined with each other and discharge connection parts of a plurality of compressors are connected to a separate oil reservoir container 11 through a discharge piping 18. In refrigerant compressors installed in plural numbers having oil supply ports communicating to slide parts of the respective compressors and connected to the oil reservoir container 11 through the oil supply pipings 20, the compressor with the discharge piping 18 having the longest length from the oil reservoir container 11 is always run when one or a plurality of sets of the compressors are run.

3. 发明专利

JPH10148188A SCROLL FLUID MACHINE 失效
公开(公告)号：JPH10148188A
公开(公告)日：1998-06-02
申请号：JP30772696
申请日：1996-11-19
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： IMAMURA HIROYUKI , TAMURA TAKAHIRO , SAKURAI KAZUO , MIYAKE SHIGEJI
IPC分类号： F04C29/00 , F04C18/02 , F04C29/02
摘要： PROBLEM TO BE SOLVED: To reduce the slant degree of a crank shaft so as to prevent uneven contact of a bearing by providing a first bearing on an engaging part of a slewing scroll and the crank shaft, providing a second bearing on a side near the slewing scroll, providing a third bearing on a side near a motor, and forming the second and third bearings as a rolling bearing. SOLUTION: In a vertical hermetic scroll compressor, an electric motor 10 is pressed and fastened into a sealed container 8, and a slewing scroll is slewing operated through a crank shaft. The axial part 16a of the crank shaft is supported by rolling bearings 17, 18 arranged on a frame 14, the rolling bearings 17, 18 are communicated with an intermediate pressure chamber 22, and a sealing device 23 is arranged downward the rolling bearing 18 in order to seal intermediate pressure. The crank part 16b of the crank shaft is fitted to a bearing 19 arranged on a back surface of the slewing scroll. An oiling passage 20 for leading lubricating oil to both rolling bearings 17, 18, the sealing device 23, and the bearing 19, is arranged along an axis of the shaft part 16a of the crank shaft in the crank shaft.

4. 发明专利

JPH07145790A SCROLL COMPRESSOR 失效
公开(公告)号：JPH07145790A
公开(公告)日：1995-06-06
申请号：JP29541093
申请日：1993-11-25
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： HIDA TAKESHI , TAMURA TAKAHIRO , SAKURAI KAZUO , IMAMURA HIROYUKI
IPC分类号： F04C29/02 , F04C18/02 , F04C29/12
摘要： PURPOSE:To prevent a hermetic scroll compressor from allowing lubrication oil to flow out, especially following discharge gas, or from so-called running out of oil. CONSTITUTION:In the case of a sealed type scroll compressor, its structure is made to be the one that possesses a throttle portion 22 to change the speed of flow and a means 23 that makes a passage formed with the groove 18 of the outer periphery portion of a frame 7 and the inner wall of a sealed container diverge into plurality. Accordingly, in the case of the sealed type scroll compressor, operation to separate oil contained in compressed refrigerant gas and return it to an oil pool becomes excellent, and running out of oil is prevented effectively, and the cooling of a motor can be made sure.

5. 发明专利

JPH0914165A REFRIGERANT ROTARY COMPRESSOR 失效
公开(公告)号：JPH0914165A
公开(公告)日：1997-01-14
申请号：JP16546095
申请日：1995-06-30
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： MIYAKE SHIGEJI , TAMURA TAKAHIRO , IIZUKA YASUNARI , IMAMURA HIROYUKI
IPC分类号： F04C18/02 , F04C29/02
摘要： PURPOSE: To prevent the occurrence of run-out of oil by a method wherein the inside diameter part of the stator of an electric motor disposed in a closed container forms a passage for delivery gas compressed by a compression mechanism part, one end face part in an axial direction forms an inlet for delivery gas, and an oil separator rotated in synchronism with a rotor is arranged at the end part of the rotor of the electric motor. CONSTITUTION: When a revolving scroll 6 effects revolving movement with the aid of an electric motor 3, after refrigerant gas sucked through a suction pipe 15 is compressed through operation of a fixed scroll 5 and the revolving scroll 6, the refrigerant gas mixed with lubrication oil is delivered through a delivery hole 17 to the upper space 14 of a closed container 1. Further, the mixture passes, in order, through a gas passage 18, a guide passage 22, and a gas passage 26 and flows in a lower space 33. In the lower space 33, the mixture passes through an oil separator 29 from a lower end surface. But, the lower end face is positioned below the coil part of a stator 24, and since the outside diameter of the lower end face is larger than the inside diameter of the coil part of the stator 24, the refrigerant gas passes the oil separator 29 with high efficiency.

6. 发明专利

JPH07332265A HERMETIC SCROLL COMPRESSOR 失效
公开(公告)号：JPH07332265A
公开(公告)日：1995-12-22
申请号：JP12857394
申请日：1994-06-10
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： MIYAKE SHIGEJI , TAMURA TAKAHIRO , IMAMURA HIROYUKI , IIZUKA YASUNARI
IPC分类号： F04C29/02 , F04C18/02 , F04C23/00 , F04C29/04
摘要： PURPOSE:To improve operation wherein lubricating oil contained in compressed refrigerant gas is separated and returned to an oil reservoir, to effectively prevent the occurrence of oil rise, and to reliably cool an electric motor. CONSTITUTION:A hermetic scroll compressor comprises a passage 18a to branch a passage, consisting of the groove 18 of the outer periphery of a frame 7 and the inner wall of a closed container, into a plurality of sections; and a throttle part 18b to change the velocity of a flow. The closed type scroll compressor is structured in such a manner that an impedance part 22 to impede a flow of refrigerant gas is located in a middle space between the branch part 18a and a delivery pipe 16.

7. 发明专利

JP2013143888A Power conversion section controller, motor characteristic measurement method and program 有权
标题翻译：电力转换部分控制器，电机特性测量方法和程序
公开(公告)号：JP2013143888A
公开(公告)日：2013-07-22
申请号：JP2012003958
申请日：2012-01-12
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AKITA YOSHITOSHI , TAMURA TAKAHIRO , NAGATA HIROSHI
IPC分类号： H02P21/00 , H02P27/04
摘要： PROBLEM TO BE SOLVED: To calculate a motor constant of an AC motor and obtain a rated torque current and a rated exciting current as a control constant required for vector control of the AC motor.SOLUTION: A motor characteristic measurement section 15 controls to change a ratio of voltage to frequency for a power conversion section 2 that varies the voltage and frequency of electric power of an AC power supply to be supplied to the AC motor 3. In first and second measurement modes, primary resistance, combined resistance and combined leakage inductance of the AC motor 3 are measured. Additionally, in a third measurement mode, a motor characteristic of the AC motor 3 is obtained from a calculation result of exciting inductance, rated torque current and rated exciting current of the AC motor 3.
摘要翻译：要解决的问题：计算交流电动机的电动机常数，并获得额定转矩电流和额定励磁电流作为交流电动机矢量控制所需的控制常数。解决方案：电动机特性测量部分15控制变更功率转换部分2的电压与频率的比率，其改变要提供给AC电动机3的交流电源的电力的电压和频率。在第一和第二测量模式中，初级电阻，组合电阻和组合的漏电感测量交流电动机3。此外，在第三测量模式中，根据励磁电感，额定转矩电流和交流电动机3的额定励磁电流的计算结果，获得交流电动机3的电动机特性。

8. 发明专利

JP2001193676A HERMETICALLY SEALED SCROLL COMPRESSOR 失效
公开(公告)号：JP2001193676A
公开(公告)日：2001-07-17
申请号：JP2000010176
申请日：2000-01-14
申请人： HITACHI LTD
发明人： SAKURAI KAZUO , TAMURA TAKAHIRO , IMAMURA HIROYUKI , MATSUNAGA MUTSUNORI
IPC分类号： F04C29/02 , F04C18/02
摘要： PROBLEM TO BE SOLVED: To provide a hermetically sealed scroll compressor with an enhanced performance by certainly returning the oil separated by an oil separator using a low-cost configuration and reducing the heating loss in the sealed vessel. SOLUTION: This hermetically sealed scroll compressor is equipped with an oil separator 22 at the discharge side of a sealed vessel 1, wherein a revolving scroll 6 and a stationary scroll 5 are unshed with each other to form a compressing space 56 with the reduced capacity, and the oil 28 separated by the oil separator 22 is returned to an intermediate chamber of the compressing space 56 through a throttle device 25.

9. 发明专利

JP2000234593A VARIABLE BEARING FOR SCROLL COMPRESSOR 失效
公开(公告)号：JP2000234593A
公开(公告)日：2000-08-29
申请号：JP3682099
申请日：1999-02-16
申请人： HITACHI LTD
发明人： MIZUMOTO MUNEO , KOYAMA MASAKI , YANASE YUICHI , TOJO KENJI , SAKURAI KAZUO , SEKIGUCHI KOICHI , TAMURA TAKAHIRO , INABA KOICHI
IPC分类号： F04C18/02
摘要： PROBLEM TO BE SOLVED: To make bearing rigidity small in the crank direction, and reduce contact force between a lap of a turning scroll and a lap of a fixing scroll by enlarging a radial clearance of a bearing part for connecting the turning scroll and the crankshaft to a specified value or more. SOLUTION: A fixing scroll fixed to a case and a turning scroll 11 are engaged with each other, and relatively turned to gradually reduce a compression chamber, and an actuating fluid is compressed. For preventing self-rotation of the turning scroll 11, an Oldam ring mechanism and the turning scroll 11 eccentrically turned are rotationally supported on a crankshaft 20. As a crank quantity Δof the crankshaft 20, a radial clearance of a bearing part 12 for connecting the turning scroll 11 to the crankshaft 20 is enlarged by a range of 1.5/1000 to 4/1000. It is thus possible to eliminate a clearance between laps of the turning and fixing scrolls, and it is also possible to improve compression performance.

10. 发明专利

JP2559430B2 失效
公开(公告)号：JP2559430B2
公开(公告)日：1996-12-04
申请号：JP27296487
申请日：1987-10-30
申请人： HITACHI LTD
发明人： SAKURAI KAZUO , TAMURA TAKAHIRO
IPC分类号： F04C18/02 , F04C23/02 , F04C29/00 , F04C29/12

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