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1. 发明专利

JPH08239677A COMPRESSOR 失效
公开(公告)号：JPH08239677A
公开(公告)日：1996-09-17
申请号：JP3170896
申请日：1996-02-20
申请人： HITACHI LTD
发明人： IIZUKA TADASHI , NAKA REIJI , FUKUDA KATSUMI , TANAKA MAKOTO , HONMA KICHIJI , HATAKE HIROAKI , KOSOKABE HIROKATSU , NARIYOSHI KOUJI , IWATA HIROSHI
IPC分类号： F04C29/00 , C09K5/04 , C10M105/38 , C10M169/04 , C10N20/02 , C10N20/04 , C10N30/00 , C10N30/06 , F04C29/02 , F25B1/00
摘要： PURPOSE: To manufacture a compressor which uses a refrigerator oil highly compatible with and fitted for a refrigerant mainly composed of chlorine-free carbon fluorides as represented by hydrofluorocarbon 134a and has a superior lubricating performance and 18 capable of achieving a reliable refrigeration cycle. CONSTITUTION: This is a high pressure vessel type of a compressor whose closed casing 1 stores refrigerator oil 13 and houses a motor 22 consisting of a rotor 20 and a stator 19, a rotary shaft 4 fitted into the rotary shaft and a compressor unit 23 coupled with the motor 22 through the rotary shaft 4 and encloses the high pressure refrigerant gas discharged from the compressor unit. And for the refrigerator oil 13, a refrigerator oil is used whose viscosity is 2-70cSt at 40 deg.C and 1-9cSt at 100 deg.C and main component is an ester oil of a fatty acid having at least 2 ester bonds (C-CO-) in the molecule. And the wound wire 19a for the stator 19 is made up of a core wire insulated with an enamel having glass transition temperature of 120 deg.C or higher.

2. 发明专利

JPH08253779A COMPRESSOR 失效
公开(公告)号：JPH08253779A
公开(公告)日：1996-10-01
申请号：JP3170796
申请日：1996-02-20
申请人： HITACHI LTD
发明人： IIZUKA TADASHI , NAKA REIJI , FUKUDA KATSUMI , TANAKA MAKOTO , HONMA KICHIJI , HATAKE HIROAKI , KOSOKABE HIROKATSU , NARIYOSHI KOUJI , IWATA HIROSHI
IPC分类号： F04C29/00 , C09K5/04 , C10M105/38 , C10M169/04 , C10N20/00 , C10N20/02 , C10N20/04 , C10N30/06 , C10N40/30 , F04C29/02 , F25B1/00 , H02K3/44
摘要： PURPOSE: To obtain a compressor for use in a refrigerator which contains a refrigerator oil highly compatible with and suitable for use with a refrigerant consisting mainly of a chlorine-free fluorocarbon represented by HFC134a. CONSTITUTION: The compressor, which is used for conducting refrigeration cycles, contains a refrigerator oil 13 serving as a lubricating oil in a hermetically closed vessel 1 and compresses at least a refrigerant gas. The oil 13 has a critical temp. of 4O deg.C or higher and viscosities of 2-70cSt at 40 deg.C and 1-9cSt at 100 deg.C and comprises as a base oil a fatty acid ester having at least two ester bonds (-O-CO-) per molecule. Thus, the properties of the lubricating oil film formed on a rotating shaft 4 and a bearing part 5 of the compressor and the electrical insulating performance of an electric motor 22 are significantly improved, and the reliability of refrigeration cycles is highly improved.

3. 发明专利

JPH08240351A FREEZING DEVICE 失效
公开(公告)号：JPH08240351A
公开(公告)日：1996-09-17
申请号：JP3170696
申请日：1996-02-20
申请人： HITACHI LTD
发明人： IIZUKA TADASHI , NAKA REIJI , FUKUDA KATSUMI , TANAKA MAKOTO , HONMA KICHIJI , HATAKE HIROAKI , KOSOKABE HIROKATSU , NARIYOSHI KOUJI , IWATA HIROSHI
IPC分类号： F25B1/00 , C09K5/04 , C10M105/36 , C10M105/38 , C10N20/02 , C10N20/04 , C10N30/00 , C10N30/06
摘要： PURPOSE: To provide a freezing device storing refrigerating machine oil of high compatibility adapted for refrigerant having, as its major substituent, carbon fluoride refrigerant not including chlorine. CONSTITUTION: The title freezing device is used in a freezing cycle which is comprised of at least a compressor 40, a condenser 41, a drying device 45, an expansion mechanism 42 and an evaporator 43. Then, substance having, as its major component, carbon fluoride with a critical temperature of 40 deg.C or higher and containing no chlorine is used as refrigerant, ester oil of fatty acid having a viscosity of 2 to 70cSt at a temperature of 40 deg.C and a viscosity of 1 to 9cSt at a temperature of 100 deg.C and having at least two ester couplings (-O-CO-) in its molecule as basic oil is used as an oil of refrigerating machine, and this freezing machine does not use any extreme-pressure agent. A superior lubricating characteristic can be attained with such oil of refrigerating machine having a superior compatibility and then a freezing cycle having a high reliability can be realized.

4. 发明专利

JPH04183788A REFRIGERATOR AND REFRIGERANT COMPRESSOR 失效
公开(公告)号：JPH04183788A
公开(公告)日：1992-06-30
申请号：JP30873690
申请日：1990-11-16
申请人： HITACHI LTD
发明人： IIZUKA TADASHI , NAKA REIJI , FUKUDA KATSUMI , TANAKA MAKOTO , HONMA KICHIJI , HATAKE HIROAKI , KOSOKABE HIROKATSU , NARIYOSHI KOUJI , IWATA HIROSHI
IPC分类号： C09K5/04 , C10M105/38 , C10M105/44 , C10M169/04 , C10M171/00 , C10N20/02 , C10N20/04 , C10N30/06 , C10N40/30 , F25B1/00 , F25B31/00 , F25B43/00 , H02K3/44
摘要： PURPOSE:To obtain a refrigerator containing a refrigerator oil capable of decreasing ozonosphere-destruction coefficient to zero and lowering globe- warming coefficient and having high compatibility by using a refrigerator oil composed of a specific fluorocarbon refrigerant and a specific fatty acid ester oil as base oil. CONSTITUTION:The objective refrigerator contains a refrigerator oil containing a base oil composed of (A) a refrigerant composed mainly of a fluorocarbon refrigerant having a critical temperature of >=40 deg.C, free from chlorine and preferably composed of chlorofluorocarbon 134a and (B) a fatty acid ester oil having a viscosity of 2-70cSt at 40 deg.C and 1-9cSt at 100 deg.C and containing plural ester bonds in the molecule. The preferable examples of the component B are compounds of formula I to formula V (R1 is H or 1-3C alkyl; R2 is 5-12C alkyl; R3 is 1-3C alkyl; n is 0 or integer of 1-5).

5. 发明专利

JPH08259975A REFRIGERATOR 失效
公开(公告)号：JPH08259975A
公开(公告)日：1996-10-08
申请号：JP3170496
申请日：1996-02-20
申请人： HITACHI LTD
发明人： IIZUKA TADASHI , NAKA REIJI , FUKUDA KATSUMI , TANAKA MAKOTO , HONMA KICHIJI , HATAKE HIROAKI , KOSOKABE HIROKATSU , NARIYOSHI KOUJI , IWATA HIROSHI
IPC分类号： F25B1/00 , C09K5/04 , C10M105/36 , C10M105/38 , C10M169/04 , C10N20/00 , C10N20/02 , C10N20/04 , C10N30/06 , C10N40/30 , H02K3/44
摘要： PURPOSE: To obtain a refrigerator which uses a refrigerator oil highly compatible with a refrigerant mainly comprising a fluorocarbon contg. no chlorine (e. g. HFC-134a). CONSTITUTION: This refrigerator is applied for a refrigeration cycle consisting of a compressor 40, a condenser 41, an expansion mechanism 42, and an evaporator 43, uses a refrigerant mainly comprising a fluorocarbon contg. no chlorine and having a critical temp. of 40 deg.C or higher, and uses a refrigerator oil of which the base oil is a fatty acid ester having a viscosity of 2-70cSt at 40 deg.C and 1-9cSt at 100 deg.C and at least two ester bonds (-OCO-) in the molecule. The refrigerator oil, highly compatible with the refrigerant, exhibits an excellent lubricity and enables a highly reliable refrigerating cycle to be realized.

6. 发明专利

JPH06173877A BEARING FOR ROTATING MACHINE AND SCROLL COMPRESSOR USING THE SAME 失效
公开(公告)号：JPH06173877A
公开(公告)日：1994-06-21
申请号：JP2806593
申请日：1993-02-17
申请人： HITACHI LTD
发明人： WAKANA TATSUYA , INABA KOICHI , NARIYOSHI KOUJI , SHIMADA ATSUSHI , KAWAMINAMI SHIGEYA , SHIMADA YOSHIYUKI
IPC分类号： F04C18/02 , F04C29/00 , F04C29/02
摘要： PURPOSE:To provide an inexpensive bearing of a rotating machine having high reliability and a scroll compressor using the same by preventing microscopical seizure phenomenon caused by the degraded condition of supply of lubricating oil while improving an assembling property and reducing noises. CONSTITUTION:In a scroll compressor provided with a main bearing 8 for supporting a crankshaft 6 and on both sides of a motor part 10 with a lower bearing 9, the lower bearing 9 is composed of a spherical bearing 9A and inner spherical housing 9B to have a self-aligning function and the housing 9B is provided with an inserting groove 9Ba in which a spherical bearing 9A can be inserted. Also, the material of the bearing is a carbon steel material for machine structure or casting material and the surface thereof is subjected to nitriding process and further coating process of molybudenum disulfide and manganese phosphate. Further, in the scroll compressor, using a differential oil supply system for oil supply to the bearing, a resin material with a back metal is used for a bearing 4C of a turning scroll.

7. 发明专利

JPS62129584A CLOSED TYPE ELECTRIC COMPRESSOR 失效
公开(公告)号：JPS62129584A
公开(公告)日：1987-06-11
申请号：JP26929885
申请日：1985-12-02
申请人： HITACHI LTD
发明人： OGINO KENJI , ISHIKAWA YASUO , NARIYOSHI KOUJI , NAKADA YUKICHI
IPC分类号： F04B39/02 , F04C29/02
摘要： PURPOSE:To enable the easy fitting of magnets to a magnet retaining device on the bottom of a closed container by providing a plurality of pawls for retaining the upper part of the magnets and an arm extending in a radial direction of the magnets on side device, and further fitting a pawl to the arm for retaining the magnets in a radial direction. CONSTITUTION:At upper both sides of a magnet retaining device 6, there is a pawl 6a extended internally and another pawl 6b is fitted upright at one end of the device 6 in a direction at right angles with the pawl 6a. Furthermore, an arm 6c with another upward pawl 6d is provided, extending from the opposite side of the pawl 6b. When a magnet 5 has been inserted in the magnet retaining device 6 from an 'A' direction, the pawl 6d is bent in a 'B' direction. When a magnet 3 has been additionally inserted, the pawl 6d returns upward on the elasticity thereof and the magnet 5 is rigidly retained between the pawls 6b and 6d.

8. 发明专利

JPH06221280A SCROLL COMPRESSOR 失效
公开(公告)号：JPH06221280A
公开(公告)日：1994-08-09
申请号：JP1319193
申请日：1993-01-29
申请人： HITACHI LTD
发明人： WAKANA TATSUYA , SHIMADA ATSUSHI , NARIYOSHI KOUJI , INABA KOICHI
IPC分类号： F04C18/02 , F04C29/00 , F04C29/06
摘要： PURPOSE:To easily decrease deformation of a sub-bearing caused by welding and carry out the smooth operation of the sub-bearing as a slide bearing by forming a sub-bearing part in such a manner as to slide on both sides of a crankshaft and a sub-bearing housing, and fixing the sub-bearing housing by welding. CONSTITUTION:A compressing mechanism part 2 is disposed in the upper part of the interior of a closed case 1, and in this part, the respective laps 3a, 4a of both fixed and rotary scrolls 3, 4 are engaged with each other to form a compression chamber 5. The rotary scroll 4 is revolved through an eccentric part 6a of a crankshaft 6 by a motor 10. Both main and subsidiary bearings 8 for respectively supporting the crankshaft 6 are disposed on a frame 7 fixed to the closed case 1. In this case, the sub-bearing is a self-aligning bearing comprising a spherical bearing 9A and a sub-bearing housing 9B. An annular groove 9C is formed on the sub-bearing housing 9B in order to prevent deformation caused by welding. That is, the sib-bearing is aligned with the crankshaft 6 and fixed on a support leg 13.

9. 发明专利

JPH05157080A CLOSED TYPE ROTATIONAL COMPRESSOR 失效
公开(公告)号：JPH05157080A
公开(公告)日：1993-06-22
申请号：JP31722691
申请日：1991-12-02
申请人： HITACHI LTD
发明人： YAZAWA HIDEKI , MISHINA MASATOSHI , HATAKE HIROAKI , NARIYOSHI KOUJI , ISHIKAWA YASUO
IPC分类号： F04C29/12 , F04C29/00 , F04C29/04 , F04C29/06
摘要： PURPOSE:To improve assembly characteristic by improving a connection structure of a discharge tube to an exit hole of a discharge chamber formed on a secondary bearing by which a crank shaft is axially supported, in the case of a closed rotational compressor, in which a compressor structural part is formed by fitting a rolling piston followed by a vane point in the outer peripheral surface, into a cylinder. CONSTITUTION:The capacity of an inlet chamber as well as a compressor chamber in a cylinder 3 of a lateral rotary compressor is changed according to the reciprocation of a vane 6 following the eccentric rotation of a roller 7 by driving an electric motor M, and suction and compression of gas is carried out thereby, and a compressed gas passes a discharge hole 5a, and is discharged to the outside through a discharge valve chamber 15. A discharge tube 18 fixed to a case 16 is connected to a discharge chamber exit hole 10 of a silencer chamber cover 10 mounted on a secondary bearing 5, on which a silencer chamber 11 is recessed, through a tubular elastic body 19. Namely, one end of the tubular elastic body 19 is mounted on the discharge tube 18, while the other end is connected to the silencer chamber cover 10, with a discharge chamber exit hole 10a surrounded thereby. The accuracy of assembly tolerance for the discharge tube 18 as well as for an inlet tube 20 is thus eased.

10. 发明专利

JPH0428964A FREEZING CYCLE AND REFRIGERANT COMPRESSOR 失效
公开(公告)号：JPH0428964A
公开(公告)日：1992-01-31
申请号：JP13418890
申请日：1990-05-25
申请人： HITACHI LTD
发明人： KONNO HAJIME , FUKUDA KATSUMI , HATAKE HIROAKI , NARIYOSHI KOUJI , KAWAMINAMI SHIGEYA , TAGAWA SHIGETARO , IIZUKA TADASHI , KENMORI YOSHIHIKO , TAMAZAWA KAZUAKI
IPC分类号： F04C29/00 , C09K5/04 , C10M105/52 , C10M111/02 , C10N40/30 , F04C29/02 , F25B1/00
摘要： PURPOSE:To reduce an amount of application of a restricted refrigerant such as CFC-12 or the like, reduce a double layer separation temperature and improve a reliability of a minimum evaporation temperature at a low freezing temperature operation in a freezing cycle using a fluorocarbon refrigerant by a method wherein as the refrigerant, CFC-502 is used and as an oil of a freezer device alkylbenzene oil having a specific viscosity is used. CONSTITUTION:As refrigerant, CFC-502 is used. As oil of a freezer device, alkylbenzene oil with a viscosity of 50 to 65cSt at 40 deg.C and a viscosity of 5.5 to 6.5cSt at 100 deg.C, i.e., Z300A is used, thereby a double-layer separation temperature is decreased. Refrigerant mixed with CFC-12 and CFC-502 by 5 to 15% is used and Z300A is used as the oil of freezer device, resulting in that the double-layer separating temperature is low at about -40 deg.C to -60 deg.C. In addition, if Z300A is used as the oil for freezer device, it is possible to keep a minimum oil film thickness while maintaining performance. Accordingly, a phenomenon of splashing oil at the low temperature freezing of a minimum evaporating temperature of -40 deg.C to -60 deg.C is prevented and then a reliability in operation can be improved.

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