公开(公告)号：JPH02267380A

公开(公告)日：1990-11-01

申请号：JP8889289

申请日：1989-04-07

Applicant: MATSUSHITA REFRIGERATION

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

IPC: F04C29/00 ,  F04C29/12

Abstract: PURPOSE:To reduce pressure loss by drilling a discharge hole, opening to the high pressure chamber of a compressive chamber, in a housing forming the compressive chamber by supporting the both end surfaces of a cylinder, and providing a conical chamfering, meeting specified conditions, at the opening end of the discharge hole. CONSTITUTION:A compressive chamber formed of a cylinder 1 and a housing 4 supporting the both end surfaces of the cylinder 1 is divided into a low pressure chamber 5 and high pressure chamber 6 by means of a vane 3. With this constitution, a discharge hole 7 opening to the high pressure chamber 6 is drilled in the housing 4, and a conical chamfering 9 meeting the following conditions is given to all around the opening end of the discharge hole 7. The diameter of the chamfering 9 is set at 110 to 150% of that of the discharge hole 7, and offset toward the opposite side of the vane 3 by 5 to 25% of that of the discharge hole 7. Also, the chamfering 9 overlapped with the vane 3 is set at less than 6.5% of the width of the vane 3 and at less than 0.75% of apparent sliding area between the housing 4 and the vane 3.

公开(公告)号：JPH02171564A

公开(公告)日：1990-07-03

申请号：JP32664088

申请日：1988-12-23

Applicant: MATSUSHITA REFRIGERATION

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

IPC: F04C28/06 ,  F16K15/02 ,  F16K51/00 ,  F25B41/04

Abstract: PURPOSE:To provide a less-expensive suction check valve having less flow resistance by a method wherein a first inlet communicating with a first outlet connected to a suction pipe of a compressor is provided, a second outlet communicating with a second inlet connecting with an evaporator system has a valve seat, the valve seat is provided with a contacting or removing valve and then a mesh is provided between the valve and the first inlet. CONSTITUTION:A first outlet 14a is connected to a suction pipe 3 of a compressor 1 for a check valve 13 and a second inlet port 15a is connected to an evaporator system 10. The first inlet 14b is connected to a first outlet port 14a and the second outlet 15b is connected to the second inlet 15a. A mesh 17 is fixed between the valve 16 and the first inlet 14b. During an operation of the compressor, the valve 16 is floated up and stopped by the mesh 17. The refrigerant may pass through the valve seat 18, pass through the mesh 17, is sucked into the compressor. Impurities are stopped by the mesh. During a stopped state of the compressor, the valve body 16 is contacted with the valve seat 18 so as to prevent the refrigerant from flowing into the evaporation system. The mesh is made to serve as a valve stopper, thereby the mesh within the suction pipe of the compressor can be eliminated and then a less-expensive suction check valve without having any low flow resistance can be attained.

公开(公告)号：JPH0261385A

公开(公告)日：1990-03-01

申请号：JP21405888

申请日：1988-08-29

Applicant: MATSUSHITA REFRIGERATION

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

IPC: F04C29/02

Abstract: PURPOSE:To obtain the vertical rotary compressor which can be easily manufactured and free from troubles at a low cost by omitting the oil feeding blades by allowing a subbearing oil groove and a main shaft oil feeding groove to communicate through a communication groove formed on the outer peripheral surface of an eccentric part. CONSTITUTION:The lower edge 50a of an oil groove for supplying oil onto a subshaft is opened into oil 5, and the upper edge 51a of an oil groove for feeding oil onto a main shaft is opened into a space 16 in a sealed container, and the upper edge 50b of the oil groove and the lower edge 51b of the oil groove communicate each other through a communication groove 54 formed on the outer peripheral surface of an eccentric part 7. Thus, the rotation of a rotor 3 is transmitted to a shaft 6, and the oil 5 is sucked from the lower edge 50a of the oil groove, accompanied with the revolution and lubricates the part between the shaft 6 and a side housing 10 and passes through a communication grove 54 through the upper edge 50b of the oil groove, and further sucked from the lower edge 51b of the oil groove and discharged into the space 16 in the sealed container from the upper edge 51a of the oil groove. Therefore, the need of housing the oil feeding blades in the conventional is obviated, and the vertical type rotary compressor free from troubles can be obtained at a low cost.

公开(公告)号：JPH11159487A

公开(公告)日：1999-06-15

申请号：JP32413197

申请日：1997-11-26

Applicant: MATSUSHITA REFRIGERATION

Inventor： IWATA HIROMITSU ,  SUZUKI ETSURO ,  WATAKABE SHUNZO ,  OZAKA MASAHIKO ,  SATO JUN

IPC: F04C29/00 ,  F04C18/356

Abstract: PROBLEM TO BE SOLVED: To strengthen rigid force while restraining a plate thickness and a height of a lower shell by setting an inside raidus of a folding-back part of a connecting part with a case shell equal to or smaller than the plate thickness, and forming a curved surface having different curvatures having the center on the axis of the case shell. SOLUTION: A lower shell 3 has a folding-back part 3b of a connecting part 3a with a case shell 2, and also has a curved surface 3c of a bottom part of the lower shell 3. The curved surface 3c of the bottom part is formed in different curvatures δ1 and δ2 having the center on the Y-Y axis. The curved surface 3c of this bottom part is formed by setting the curvature δ2 of a central part smaller than the curvature δ1 of an outside part to strengthen rigid force of the lower shell 3. Therefore, a rotary compressor of a low noise can be obtained by strengthening rigidity of the lower shell 3 while restraining a plate thickness (t) and a height (h) of the lower shell 3.

公开(公告)号：JPH11107931A

公开(公告)日：1999-04-20

申请号：JP26957197

申请日：1997-10-02

Applicant: MATSUSHITA REFRIGERATION

Inventor： NAGAO TAKAHIDE ,  OZAKA MASAHIKO ,  YANASE SEIGO ,  ONO TAKESHI ,  IIZUKA TATSUYUKI

IPC: F04B49/06

Abstract: PROBLEM TO BE SOLVED: To save the power consumption and to prevent the breaking and noise and vibration of a discharge pipe by resonance by generating an operation frequency by an inverter device, having a frequency higher than any of the lowest order natural frequencies of a support body and a spring as the lower limit and the lowest order natural frequency of the discharge pipe as the upper limit. SOLUTION: The support body, spring and discharge pipe of an inverter device are resonated at respective operation frequencies C1, C2, C3. Thus, specified frequencies Ca, Cb, Ce (≠ C1, C2, C3) having frequencies higher than C2 causing no resonance in the spring and the discharge pipe as the lower limit and C3 as the upper limit are set. Thus, the discharge pipe is never resonated even if it is operated with the frequency being reduced to the specified frequency Ca in a low load, and the power consumption can be saved. Further, the discharge pipe is never resonated even if it is operated at the specified frequency C3 in a high load, and the capacity can be raised.

公开(公告)号：JPH1061554A

公开(公告)日：1998-03-03

申请号：JP22489796

申请日：1996-08-27

Applicant: MATSUSHITA REFRIGERATION

Inventor： OZAKA MASAHIKO ,  YAKUSHI SHUICHI ,  ITO SHINYA ,  MARUYAMA TOMIO

IPC: F04B39/10

Abstract: PROBLEM TO BE SOLVED: To provide a valve device having low cost and high reliability in a valve device of a compressor to be used for a cooling cycle. SOLUTION: A discharge read valve 21 provided with a bent part 21a is so arranged as to be pressed by a groove part 25a of a stopper 25 fixed on a valve plate 2 having such a shape as to be engaged with the bent part 21a, and therefore, low cost can be achieved without reducing the efficiency of a compressor, and high reliability can be realized by absorbing and reducing the unnecessary motion other than the opening and closing motion of the discharge read valve 21.

公开(公告)号：JPH06323256A

公开(公告)日：1994-11-22

申请号：JP11446693

申请日：1993-05-17

Applicant: MATSUSHITA REFRIGERATION

Inventor： OZAKA MASAHIKO ,  WADA SATOSHI ,  SAEKI YUJI ,  KOMORI HIROYUKI

IPC: F04B39/10 ,  F04B39/12

Abstract: PURPOSE:To make a suction valve open while twisting it and satisfactorily follow a piston to increase suction efficiency, by positioning the axis of a tray pan part installed at one end of a suction port eccentrically from the center of an arc which forms a part of the valve end part of the suction valve. CONSTITUTION:When a piston 10 is reciprocated, refrigerant gas passes a suction port 12 of a valve plate 11, and sucked into a cylinder 6 by the opening and closing of a suction valve 13. In this case, the suction valve 13 opens the suction port 12 with its valve end part 13a twisted, and is set in parallel with the suction port 12. Namely a tray pan part 12a is installed at one end of the suction port 12, and an axis 12b is positioned eccentrically from the center 13b of an arc which forms a part of the valve end part 13a. Accordingly the suction valve 13 makes a torsional motion of relatively low rigidity, and satisfactorily follows the reciprocating motion of the piston 10. Then the refrigerant gas passes a delivery port 3 of the valve plate 11 after it is compressed in the cylinder 6, and is discharged according to the opening and closing of a delivery valve 4.

公开(公告)号：JPH06264868A

公开(公告)日：1994-09-20

申请号：JP5047693

申请日：1993-03-11

Applicant: MATSUSHITA REFRIGERATION

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

IPC: F04B39/00

Abstract: PURPOSE:To provide a sealed compressor used for the refrigerating cycle of a refrigerator, requiring a low input, and having high reliability. CONSTITUTION:A sealed container 21 stores an electric element 22 and a compression element 23. A crank shaft 24 has an eccentric section 25, and an upper bearing 26 and a lower bearing 27 are arranged above and below the eccentric section 25. A holder 28a has a thick section 28c over the whole periphery of a bearing holding section 28b, it is fixed to the compression element 23 via the fixing sections 28d, 28e on a cylinder 29 side and a fixing section on the compression stroke side according to the rotating direction of the crank shaft 24, and the center surface 32 perpendicular to the axial direction 31 of the upper bearing 26 is formed on the upper side of the axial direction 31 against a plane 30 formed by the fixing sections 28d, 28e.

公开(公告)号：JPH05288155A

公开(公告)日：1993-11-02

申请号：JP8356692

申请日：1992-04-06

Applicant: MATSUSHITA REFRIGERATION

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

IPC: F04B39/00 ,  F04B39/12

Abstract: PURPOSE:To provide a closed type compressor of low noise and low vibration in the refrigerating cycle of a refrigerator or the like. CONSTITUTION:In a closed container 14 provided internally with a motor-driven element 5 and a compression element 6, an upper cover 11 and a lower container 12 are mutually connected by the welding edge 13 of the lower container 12. A plane X having the welding edge 13 within the plane is orthogonal to planes Y17, Z18 having, within the planes, a centerline 15 which has, within the line, the center point of an optional curved face forming the upper face of the upper cover 11 and the center point of an optional curved face forming the bottom face of the lower container 12. An optional curve C19 forming the closed container 14 is formed of asymmetric curvature as and line segment length unequal to CX20, CY21, CZ22 existing in the positions symmetric to the respective planes X16, Y17, Z18.

公开(公告)号：JPH05164049A

公开(公告)日：1993-06-29

申请号：JP33311191

申请日：1991-12-17

Applicant: MATSUSHITA REFRIGERATION

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

IPC: F04B39/10

Abstract: PURPOSE:To improve a volumetric efficiency by using a spherical delivery valve, and also reduce noise in a valve device of a reciprocating compressor used in a refrigerator and so on. CONSTITUTION:A valve device for a reciprocating compressor is composed of a recess part 21 formed in a valve plate 4, a resinous sheet 22 fitted in the recess part 21, a delivery valve seat 24 arranged on the sheet 22, a spherical delivery valve 25, a valve presser 26 having an inner surface shape in conformity with a shape of the delivery valve 25, a coil spring 27 and a holder 28 into which the delivery valve 25, the valve presser 26 and the coil spring 27 are embedded/inserted.