公开(公告)号：JPH03258984A

公开(公告)日：1991-11-19

申请号：JP5528290

申请日：1990-03-06

Applicant: MATSUSHITA REFRIGERATION

Inventor： OZAKA MASAHIKO ,  KAWAI HIDEKI ,  NISHIHARA HIDETOSHI ,  OTA TOSHIHIKO ,  MATSUMOTO TAKESHI

IPC: F04C11/00 ,  F04C23/00

Abstract: PURPOSE:To enhance the miniaturization and reduction in noise by conforming the discharge directions to release the discharge flows from first and second compression chambers into a single muffler. CONSTITUTION:A first cylinder 31 forms a first compression chamber 29 together with a rotor 3 side housing 27 and a first intermediate plate 28, and has a first communicating hole 33 for guiding discharge flow to a muffler 32. A second cylinder 40 forms a second compression chamber together with a second intermedinate plate 34 and an anti-rotor 3 side housing 36. The discharge directions are conformed to each other to release the discharge flows from the first and second compression chambers 29, 37 into the single muffler 32. Hence, miniaturization can be enhanced while holding a sufficient muffler capacity. The pulsation component contained in the discharge flow can be smoothed to reduce noise.

公开(公告)号：JPH03237290A

公开(公告)日：1991-10-23

申请号：JP3279090

申请日：1990-02-14

Applicant: MATSUSHITA REFRIGERATION

Inventor： OZAKA MASAHIKO ,  KAWAI HIDEKI ,  NISHIHARA HIDETOSHI ,  SAEKI YUJI ,  ARIMIZU KOJI

IPC: F04C23/00 ,  F04C29/06

Abstract: PURPOSE:To reduce the pulsation of discharge flow so as to obtain a silent two-cylider rotary compressor by uniting the discharge flow from a first compression chamber and that from a second compression chamber in a muffler with approximately half cycle phase delay. CONSTITUTION:A crankshaft 22 is provided with a first and a second eccentric shafts 23, 24, and a first cylinder 31 forms a first compression chamber 29 together with a rotor side housing 27 and a first middle plate 28. The first middle plate 28 is provided with a first discharge opening 31 for the passing of discharge flow from the first compression chamber 29 as well as with a first communicating hole 33for leading discharge flow to a muffler 32. A second cylinder 40 forms a second compression chamber 37 together with a second middle plate 34 and a non-rotor side housing 36, and is provided with a second communicating hole 35 for communicating the first communicating hole 33 with a release hole 39. The eccentric direction phase difference of the first and second eccentric shafts 23, 24 of the crankshaft 22 is determined in such a way that the discharge flow from the first compression chamber 29 and that from the second compression chamber 37 are united in the muffler 32, being dislocated by approximately half phase in relation to the rotational cycle of the crankshaft 22.

公开(公告)号：JPH02173392A

公开(公告)日：1990-07-04

申请号：JP32665388

申请日：1988-12-23

Applicant: MATSUSHITA REFRIGERATION

Inventor： KAWAI HIDEKI ,  SASANO HIROSHI ,  OTA TOSHIHIKO ,  OZAKA MASAHIKO

IPC: F04C29/06

Abstract: PURPOSE:To enable surface polishing of a valve seat and to improve sealing ability by providing an auxiliary bearing part which is disposed to a plate in a manner to cover a plate, sealing the end surface of a cylinder and provided on a surface opposite to a cylinder with a delivery valve and a valve seat, and a delivery valve, and pivotally supports the side, opposite to a motor element, of a shaft and a plurality of delivery mufflers. CONSTITUTION:Gas compressed by a compression chamber 6 flows through a gap between a valve seat 17 of a plate 15 and a delivery valve 16, and is released in a closed vessel 1 after the passage of it through a first chamber 20a of a delivery muffler chamber 20, a communicating passage 20d, a second chamber 20b, a communicating passage 20e, a third chamber 20c, and an auxiliary bearing delivery hole 19. The load of a shaft 5 is supported by main and auxiliary bearings 10 and 18. Thus, by division of a bearing function from a valve seat function, the plate 15 can form a plate, surface polishing of the valve seat surface and the surface on the cylinder side of the plate is practicable, and machining precision of the valve seat surface is improved. A delivery muffler chamber formed with the auxiliary bearing and the plate can be formed with a plurality of muffler chambers and a communicating passage, and a muffling effect.

公开(公告)号：JPH0233486A

公开(公告)日：1990-02-02

申请号：JP18437588

申请日：1988-07-22

Applicant: MATSUSHITA REFRIGERATION

Inventor： OZAKA MASAHIKO ,  KAWAI HIDEKI ,  SASANO HIROSHI ,  OTA TOSHIHIKO

IPC: F04C29/04

Abstract: PURPOSE:To improve the refrigerating capability by inserting airtightly pinched heat insulating materials between cylinder both end faces and at least one of side housings. CONSTITUTION:A rotor side heat insulating material 15 is airtightly pinched between a side housing 8 on the rotor side and a cylinder, a heat insulating material 16 on the opposite side to the rotor is airtightly pinched between a side housing 10 on the opposite side to the rotor and the cylinder 7. The heat insulation property between the cylinder 7 and the side housings 8 and 10 is increased, the thermal effect between a compression element and the refrigerant gas is decreased, thus the specific gravity quantity of the intake refrigerant gas under the same intake volume is increased. The refrigerating capability is improved, a compressor with high efficiency can be realized.

公开(公告)号：JP2002227766A

公开(公告)日：2002-08-14

申请号：JP2001319023

申请日：2001-10-17

Applicant: MATSUSHITA REFRIGERATION

Inventor： KUBOTA AKIHIKO ,  NISHIHARA HIDETOSHI ,  OZAKA MASAHIKO ,  OTA TOSHIHIKO ,  AWASHIMA HIROKI ,  MOTEGI MANABU ,  NOGUCHI KAZUHITO ,  KOJIMA TAKESHI ,  SUMIYA MASAHIRO

IPC: F04B39/00 ,  F04B39/10

Abstract: PROBLEM TO BE SOLVED: To provide a quiet compressor capable of more effectively damped resonance sound in a compression chamber and an inlet pressure pulsation generated in an inlet valve, as for a hermetic compressor used for the refrigerating cycle of a refrigerator and the like. SOLUTION: Noise can be more effectively damped than the noise reducing function of an intake muffler 31 by providing a resonance space 38 in the vicinity of an inlet valve port 29 positioned closer to a noise generating source. In addition, in regard to amplification of the noise with a specific frequency caused by acoustic characteristics of the intake muffler 31, the noise with the frequency can be damped before it is amplified.

公开(公告)号：JP2000356187A

公开(公告)日：2000-12-26

申请号：JP16640899

申请日：1999-06-14

Applicant: MATSUSHITA REFRIGERATION

Inventor： KUBOTA AKIHIKO ,  OZAKA MASAHIKO ,  MOTEGI MANABU ,  SUMIYA MASAHIRO ,  KAWABATA MAIKO

IPC: F04B39/00 ,  F04B39/02

Abstract: PROBLEM TO BE SOLVED: To reduce the noise of a hermetic compressor mounted in an electric refrigerator or the like. SOLUTION: In this compressor, refrigerating machine oil stagnated in an upper surface of a cylinder block 9 uniformly flow out of a release part 13 of the refrigerating machine oil by an effect of a refrigerating machine oil drop preventing wall 12. At this time, the arranged position of the release part 13 of the refrigerating machine oil, enables the control of the route of the refrigerating machine oil returning to a bottom part of a hermetic vessel. In this way, a drop of the oil from an edge part of the cylinder block 9 is prevented, and generation of a collision sound generated by collision against a splash sprung by rotation of a supply oil pipe can be avoided. Accordingly, the noise of the compressor can be reduced.

公开(公告)号：JPH06117374A

公开(公告)日：1994-04-26

申请号：JP26453792

申请日：1992-10-02

Applicant: MATSUSHITA REFRIGERATION

Inventor： WADA SATOSHI ,  KAWAI HIDEKI ,  SAEKI YUJI ,  OZAKA MASAHIKO

IPC: F04B39/00 ,  F04B39/14

Abstract: PURPOSE:To prevent the deterioration of reliability and reduce dimension by carrying out assembly of a compressor in the state where a rolling bearing is assembled on a crankshaft, when the rolling bearing is used, in order to improve the assembly workability of a sealed type motor-driven compressor used for a refrigerator, etc. CONSTITUTION:A sealed type motor-driven compressor is constituted of a body 15a, piston 16 connected with one edge of the body 15a, cylinder 22, and a cut part 25 formed on the cylinder 22 into which the body 15a is insertion-fitted.

公开(公告)号：JPH05288154A

公开(公告)日：1993-11-02

申请号：JP8355792

申请日：1992-04-06

Applicant: MATSUSHITA REFRIGERATION

Inventor： WADA SATOSHI ,  SAEKI YUJI ,  KAWAI HIDEKI ,  OZAKA MASAHIKO

IPC: F04B39/00 ,  F04B39/02

Abstract: PURPOSE:To lower input in the case of using rolling bearings so as to improve efficiency regarding the high efficiency of a closed type motor-driven compressor used for a refrigerator or the like. CONSTITUTION:A closed type motor-driven compressor is formed of a crankshaft 20 fixed to the rotor 5 of a motor-driven element 2, an eccentric shaft 21 provided at the crankshaft 20, two ball bearings 22, 23 for rotatably supporting the crankshaft 20 and main shafts 20a, 20a provided on both axial sides of the eccentric shaft 21, and an approximately circular plate 26 provided at the crankshaft 20.

公开(公告)号：JPH04191479A

公开(公告)日：1992-07-09

申请号：JP31860090

申请日：1990-11-22

Applicant: MATSUSHITA REFRIGERATION

Inventor： OZAKA MASAHIKO ,  HAMADA KOJI ,  SASANO HIROSHI ,  KUBOTA AKIHIKO

IPC: F04B39/00 ,  F04B39/12

Abstract: PURPOSE:To restrict abnormal vibration of the refrigerant gas, and reduce the generation of the noise by comprising a plenum chamber for abutting on a suction hole of a cylinder head in a suction muffler, and connecting that plenum chamber and the suction muffler with at least more than two connecting pipes having different section area. CONSTITUTION:A suction muffler 35 to be housed in a sealed type container 32 with an electric element and a compressing element is connected to a suction hole 41 for communication through a connecting pipe 37. In this case, the connecting pipe 37 consists of three connecting passages 37a-37c having different length and section area, and one end of each connecting passage 37a-37c is fitted in a suction hole of a cylinder head 40 so as to be opened in a plenum chamber 39 of the cylinder head 40. Even if one of the connecting passages 37a-37c has a natural frequency mode inappropriate for the flow of the refrigerant gas and the refrigerant gas generates the abnormal vibration, since at least one of other connecting passages has other natural frequency mode, abnormal movement of the refrigerant gas is restricted.

公开(公告)号：JPH03138479A

公开(公告)日：1991-06-12

申请号：JP27531689

申请日：1989-10-23

Applicant: MATSUSHITA REFRIGERATION

Inventor： ARIMIZU KOJI ,  KAWAI HIDEKI ,  NISHIHARA HIDETOSHI ,  OZAKA MASAHIKO

IPC: F04C29/00 ,  F04C18/356

Abstract: PURPOSE:To improve abrasion resistance and prevent the abrasion with an opponent member by forming a vane, which is fitted in a groove on a cylinder in slidable manner and springily attached to a roller, by nitriding-treating steel or sintered alloy which contains Cr, Mo and V and does not contain W. CONSTITUTION:A roller 2 is accommodated in free rolling inside a cylinder 1. Further, inside a groove 4 formed on the cylinder 1, a vane 3 is fitted in slidable manner. Further, the vane 3 is elastically pressed for the roller 2, In this case, the vane 3 is made by nitride-treating steel or sintered alloy which contains Cr, Mo, and V and does not contain W. For example, at the top edge surface layer part of the vane 3, a compound layer through the reaction of N with Fe and Cr in the basic material is formed as a first layer 9 in the upper part, while the improvement of the hardness and the lowering of the friction coefficient are achieved. Further, as a second layer 10 in the lower part, the structure in which the diffusion reaction of N is developed with Cr as the basic material and necessary compound layers 11 are scatteredly organized.