公开(公告)号：JPH07151078A

公开(公告)日：1995-06-13

申请号：JP25453594

申请日：1994-09-22

Applicant: ZEXEL CORP

Inventor： NAKAJIMA NOBUFUMI ,  SAITO SUSUMU ,  ISHIKAWA MASAKUNI

IPC: F04C27/00 ,  F04C18/02 ,  F04C29/02

Abstract: PURPOSE:To improve the performance of refrigerant to be separated from lubricating oil by providing a circumferential wall cover along the range of rotation of a balance weight, and positioning the upper end part of the opening part of a refrigerant passage which is formed on the circumferential wall cover downward from the bottom end surface of the balance weight. CONSTITUTION:A main shaft is rotatably maintained while penetrating the center of a block, a circumferential wall cover 27 is fixed to the upper end of the block, a swinging scroll member is maintained on the bottom end thereof. The circumferential wall cover 27 is so provided as enclosing on the block, a turn space 27c in which a balance weight 17 turns, and forming a refrigerant passage 27a' and a lubricating oil passage thereon. In this case, the upper end of an opening part which is opened on the circumferential wall part of the refrigerant passage 27' is positioned below the bottom end part in the range of rotation of the balance weight 17. The refrigerant passing the refrigerant passage 27a' is stirred as well as forced to collide with the bottom end surface of the balance weight 17 so as to separate the refrigerant from lubricating oil effectively.

公开(公告)号：JPH074367A

公开(公告)日：1995-01-10

申请号：JP17110293

申请日：1993-06-17

Applicant: ZEXEL CORP

Inventor： NAKAJIMA NOBUFUMI ,  ISHIKAWA MASAKUNI ,  SAITO SUSUMU

IPC: F04C18/02 ,  F04C29/00 ,  F04C29/02 ,  F04C29/12

Abstract: PURPOSE:To reduce load applied to thrust bearings by pressure difference between both end parts of a driving shaft so as to prevent the seizure of the thrust bearings and thereby to improve the durability of the thrust bearings. CONSTITUTION:Thrust bearings 26, 37 are interposed between a driving shaft 10 and a block 18 so as to seal the high pressure side and low pressure side, and an oil feeding through-hole 39 is formed in such a way that one end is opened to the high pressure side shut off by the thrust bearings 26, 37 and that the other end is opened to a space partitioned by the end part of an oscillating shaft 21 extended being decentered from the driving shaft to and by an insert hole with the oscillating shaft 21 inserted therein. An annular clearance formed by the oscillating shaft 21 and the insert hole is provided with specified throttle, so that high pressure lubricating oil is supplied to the end part of the oscillating shaft 21 through the oil feeding through-hole 39 to obtain the high pressure state. Pressure difference between both ends of the driving shaft 10 can be thereby eliminated, and load applied to the thrust bearings 26, 37 can be reduced.

公开(公告)号：JPH0693985A

公开(公告)日：1994-04-05

申请号：JP26820692

申请日：1992-09-10

Applicant: ZEXEL CORP

Inventor： NAKAJIMA NOBUFUMI ,  SAITO SUSUMU ,  KAZAHAYA YUKIO ,  ISHIKAWA MASAKUNI

IPC: F04C18/02 ,  F04C29/00

Abstract: PURPOSE:To perform stable operation through suppression of the occurrence of a thermal effect by a method wherein two scroll members of the one being a rocking scroll and the other being a fixed scroll are formed of the same material and a thrust bearing to rotatably support a drive shaft is disposed to the upper end part of a block. CONSTITUTION:A fixed scroll member 26 to form a compression chamber 28 is fixed to a rocking scroll member 25, eccentrically attached on the drive shaft 10 of an electric motor disposed to the inner upper part of a closed case 9, by means of a block 17. The delivery port 29 of the compression chamber 28 is communicated to a containing chamber 37 for an electric motor through a refrigerant passage. In above constitution, the two scroll members 25 and 26 are formed of the same material consisting of mainly aluminum. The lower end part of the drive shaft 10, i.e., a gap 48 provided between the rocking member 25 and the block 17 has a pressure which is set to a value lower than a pressure in the containing chamber 37. Further, a thrust bearing 22 to rotatably support the drive shaft 10 is disposed to the upper end part of the block 17.

公开(公告)号：JPH0617677B2

公开(公告)日：1994-03-09

申请号：JP32765887

申请日：1987-12-24

Applicant: ZEXEL CORP

Inventor： NAKAJIMA NOBUFUMI ,  INOMATA KENICHI ,  MORETA MASAYA ,  YAMAGUCHI TOSHIO ,  EITAI KAZUO

IPC: F04C28/10 ,  F04C28/26 ,  F04C29/02 ,  F04C29/10

公开(公告)号：JPH065074B2

公开(公告)日：1994-01-19

申请号：JP6272388

申请日：1988-03-16

Applicant: ZEXEL CORP

Inventor： NAKAJIMA NOBUFUMI ,  INOMATA KENICHI ,  MORETA MASAYA ,  YAMAGUCHI TOSHIO ,  EITAI KAZUO

IPC: F04C28/26 ,  F04C18/344 ,  F04C28/06 ,  F04C29/10

公开(公告)号：JPH0457876B2

公开(公告)日：1992-09-14

申请号：JP17115185

申请日：1985-08-05

Applicant: ZEXEL CORP

Inventor： NAKAJIMA NOBUFUMI

IPC: F04C18/344 ,  F04C28/26

公开(公告)号：JPH041495A

公开(公告)日：1992-01-06

申请号：JP9144390

申请日：1990-04-06

Applicant: ZEXEL CORP

Inventor： NAKAJIMA NOBUFUMI

IPC: F04C28/26 ,  F04B1/26 ,  F04B49/00 ,  F04C18/344 ,  F04C28/10 ,  F04C28/14 ,  F04C29/10

Abstract: PURPOSE:To vary the extent of control pressure in a high pressure chamber as well as to control a discharge quantity in subtle and high responsiveness without enlarging a compresses in structure by opening or closing an orifice small in a passage cross sectional area by means of a solenoid valve and controlling a refrigerant gas quantity of discharge pressure to be taken into this high pressure chamber. CONSTITUTION:An on-off signal is outputted to an exciting coil 42 of a solenoid valve 40 from a control part 60 as a control signal. While an off-signal is being inputted, by way of example, since the solenoid valve 40 generates no attraction at all, a plunger 45 is situated in a valve opening position by dint of energizing force of a spring 47, and its needle valve 45b opens an orifice 31. In brief, the solenoid valve 40 is opened. If the solenoid valve 40 is opened, a refrigerant gas of discharge pressure Pd is inducted into a high pressure chamber 222 from a discharge space 19 via a high pressure inducting passage 30 and the orifice 31. At this time, control pressure Pc in the high pressure chamber 222 comes to such conformed to the ratio of on-time to off time of the on-off signal, namely, a duty ratio.

公开(公告)号：JPH0754783A

公开(公告)日：1995-02-28

申请号：JP21698893

申请日：1993-08-09

Applicant: ZEXEL CORP

Inventor： NAKAJIMA NOBUFUMI ,  SAITO SUSUMU ,  ISHIKAWA MASAKUNI

IPC: F04C18/02

Abstract: PURPOSE:To surely supply lubricating oil while its route leading to each part is connected in series. CONSTITUTION:By interrupting intermediate pressure space 25 and swivel space by a slide seal part, an oil reservoir 60, oil supply passage, oil annular groove 21b of a main bearing 21, spiral groove 18a, intermediate pressure space 25, oil draw in hole 19b, bearing space 19a, swivel bearing 31, swivel space, thrust bearing 28, scroll chamber and a lubricating oil route are constituted in series from the oil reservoir 60 of high pressure over a suction side of low pressure. Further, an outlet side of the spiral groove 18a and an inlet side of the oil draw in hole 19b are provided in an opposed position. A peripheral wall cover is provided in a block upper end, and lubricating oil, separated from a refrigerant by a main balance weight 17 making a turn motion in internal space of this peripheral wall cover, is received to a sealing oil reservoir 70 formed in an upper end of the main bearing 21.

公开(公告)号：JPH0610473B2

公开(公告)日：1994-02-09

申请号：JP601790

申请日：1990-01-11

Applicant: ZEXEL CORP

Inventor： NAKAJIMA NOBUFUMI ,  YAMAGUCHI TOSHIO

IPC: F04C27/00 ,  F04B49/00 ,  F04C18/344 ,  F04C28/10 ,  F04C28/14 ,  F04C28/26 ,  F04C29/00 ,  F04C29/02 ,  F04C29/10

公开(公告)号：JPH04334787A

公开(公告)日：1992-11-20

申请号：JP13581591

申请日：1991-05-10

Applicant: ZEXEL CORP

Inventor： NAKAJIMA NOBUFUMI ,  NAKATANI TATSUO

IPC: F04C18/344 ,  F04B49/00 ,  F04C28/10 ,  F04C28/14 ,  F04C28/26 ,  F04C29/00 ,  F04C29/06

Abstract: PURPOSE:To prevent abrasion, scuffing, seizure, and noise between a control member and a rotating shaft from occurring by pressure-inserting a ring-shaped protruding part which is integratedly provided on the rotor side surface of one race of a thrust bearing into a shaft through hole in a control member, and setting the inner peripheral surfaces of the thrust bearing and the ring-shaped protruding part from the outer peripheral surface of a rotating shaft so as not to come into contact with each other. CONSTITUTION:A radial bearing 9 and a thrust bearing 43 are installed on the inner periphery of a ring-shaped body 45 which is made of iron and is cast into the through hole 41 of a rear side block 4. A ring-shaped protruding part 48 which is integratedly provided at the rotor side surface of one race 46 of the thrust bearing 43 is pressure-inserted into a shaft through hole 24b of a control member 24, and the outer peripheral surface of the race 46 may slide on the inner peripheral surface of the ring-formed body 45, and then the respective inner peripheral surfaces of the thrust bearing 43 and the ring-shaped protruding part 48 may not come into contact with the outer peripheral surface of a rotating shaft 7. Therefore, the inner peripheral surfaces of the ring-shaped protruding part 48 and the thrust bearing 43 may not come into contact with the outer peripheral surface of the rotating shaft 7 all the time, so a radial bearing clearance does not almost vary even if the ring-shaped body 45 and a radial bearing are thermal-expanded.