公开(公告)号：JPS62284993A

公开(公告)日：1987-12-10

申请号：JP12752486

申请日：1986-06-02

Applicant: MATSUSHITA REFRIGERATION

Inventor： KOYAMA TAKASHI ,  KAMITSUJI TOSHIO

IPC: F04C23/02 ,  F04C29/00 ,  F04C29/06 ,  F04C29/12

Abstract: PURPOSE:To reduce noise by positioning either of a position where refrigerant enters an expansion chamber or a position of a hole out of which refrigerant is discharged at the longitudinal end of the expansion chamber and the other at the position about 1/2 of the length of the expansion chamber. CONSTITUTION:A recess 19 communicating via a small groove 18 with a recess 17 is arranged on a rotor side bearing 16 at a position outside the periphery of a surface 16c which is in close contact with a flat surface of a cylinder 7 on the cylinder side surface 16b of the bearing 16. A partition plate 21 is provided with a hole 21a at a position corresponding to about 1/2 of the longitudinal length of the recess 19 of the bearing 16. Accordingly, noise can be reduced by obtaining an expansion type silencing effect of 1/2 insertion type.

公开(公告)号：JPS62284991A

公开(公告)日：1987-12-10

申请号：JP12752886

申请日：1986-06-02

Applicant: MATSUSHITA REFRIGERATION

Inventor： KOYAMA TAKASHI ,  KAMITSUJI TOSHIO

IPC: F04B39/00 ,  F04C29/00

Abstract: PURPOSE:To reduce noise by employing a center pin welded and fixed to an end of a closed case for supporting and fixing the closed case at a position approximately on a same axis with that of a motor-operated compression element and making the center pin of a tapered shape thinner toward the end. CONSTITUTION:A center pin 10 of a tapered shape becoming thinner toward its end is welded and fixed to a closed case 2 for directly holding a motor- operated compression element in a fixed condition in a position approximately same with the axis of the closed case 2. A front mount 11 is inserted via an anti-vibration rubber 12. While tortional vibrations are produced when the motor-operated compression element compresses refrigerant, noise can be reduced as the natural frequency of vibration of the center pin can be made higher.

公开(公告)号：JPS61229988A

公开(公告)日：1986-10-14

申请号：JP7146385

申请日：1985-04-04

Applicant: MATSUSHITA REFRIGERATION ,  MATSUSHITA ELECTRIC IND CO LTD

Inventor： KOYAMA TAKASHI ,  SANO KIYOSHI

IPC: F04C23/02 ,  F04B39/00 ,  F04C29/00

Abstract: PURPOSE:To prevent rotation and vibration of a crankshaft for noise reduction purpose in a closed type rotary compressor by having the upper end part of the crankshaft supported by a bearing which is attached to a motor stator. CONSTITUTION:The upper end part of the crankshaft 13 of a rotary compressor mechanism which stands fixedly inside a closed case 2 is supported by an upper end part bearing 14 which is coaxially fixed to a motor stator 10. The crankshaft 13 has the opposed ends thereof supported by the upper end part bearing 14 and the upper and lower bearing 4 and 5 so that the electromagnetic vibration of the crankshaft 13 and vibration generated by virtue of the presence of eccentric load can be restrained and noise production can be prevented.

公开(公告)号：JPS61153473A

公开(公告)日：1986-07-12

申请号：JP27758884

申请日：1984-12-27

Applicant: MATSUSHITA REFRIGERATION

Inventor： KUWAJIMA KATSUYUKI ,  KAMITSUJI TOSHIO ,  KOYAMA TAKASHI

IPC: F25D19/00

公开(公告)号：JPS6146880A

公开(公告)日：1986-03-07

申请号：JP16806684

申请日：1984-08-10

Applicant: Matsushita Refrigeration

Inventor： KOYAMA TAKASHI ,  KAMITSUJI TOSHIO ,  KUWAJIMA KATSUYUKI

IPC: F25D19/00 ,  F04B39/00 ,  F04B41/00

公开(公告)号：JPS60135692A

公开(公告)日：1985-07-19

申请号：JP25039183

申请日：1983-12-23

Applicant: MATSUSHITA REFRIGERATION

Inventor： KOYAMA TAKASHI

IPC: F04C29/06

Abstract: PURPOSE:To reduce resonance in a delivery port cover and contrive the reduction of noise of the compressor by a method wherein a recessed part is provided on the delivery port cover at a position orthogonal substantially with respect to the positions of delivery ports of a bearing in order to change the resonance mode in the delivery port cover. CONSTITUTION:The mode of resonance in the delivery port cover 10b, which is generated by the pulsation of pressure generated by the compression of a refrigerant gas in a cylinder 7, is changed by adding the recessed part 13 on the delivery port cover 10b. The recessed part 13 is located at a position substantially orthogonal to the position of the delivery port 11, therefore, the resonance mode, wherein the nodes (x) are generated at the position of the delivery port 11 and the position opposing to the position of the delivery port 11, may be generated. According to this method, the delivery port 11, which becomes the source of noise, is located at the node (x) of the resonance mode and, therefore, the resonance in the delivery port cover 10b may be reduced and the quiet rotary compressor may be obtained.

公开(公告)号：JP2574368B2

公开(公告)日：1997-01-22

申请号：JP5195088

申请日：1988-03-04

Applicant: MATSUSHITA REFRIGERATION

Inventor： KOYAMA TAKASHI ,  KAMITSUJI TOSHIO ,  UMEOKA IKUTOMO ,  MORITA MITSURU

IPC: F04C23/02 ,  F04C29/00 ,  F04C29/06

公开(公告)号：JPH06288352A

公开(公告)日：1994-10-11

申请号：JP7782893

申请日：1993-04-05

Applicant: MATSUSHITA REFRIGERATION

Inventor： AKASHI HIRONARI ,  KOYAMA TAKASHI

IPC: F04B39/00 ,  F16F15/06

Abstract: PURPOSE:To prevent a large repeated stress from being added to a discharge pipe at the time of starting and stopping a motor, and prevent the breakage of the discharge pipe by providing a shock absorbing coil spring having one end fixed to a sealed vessel and the other end approached to a motor part in non-contact. CONSTITUTION:At the time of starting and stopping a motor, a large vibration by far, compared with the steady operation, is generated in an electric compression element 16, and the compression part 5 of the electric compression element 16 is apt to particularly largely shake. Since the electric compression element 16 thus makes contact with a shock absorbing coil spring 21 with which the element 16 never contact at the steady operation of the motor, and, further, the damping spring 21 is set in such a manner that the vibrating direction of the electric compression element 16 is substantially coincident to the central line of the shock absorbing spring 21, the shaking of the electric compression element 16 can be minimized by the shock absorbing spring 21. Thus, a discharge pipe 19 both ends of which are fixed to the compression part 5 and a sealed vessel 4 can be prevented from being largely deformed, and the addition of a large stress can be avoided.

公开(公告)号：JPH0674792B2

公开(公告)日：1994-09-21

申请号：JP11243785

申请日：1985-05-24

Applicant: MATSUSHITA REFRIGERATION

Inventor： KAMITSUJI TOSHIO ,  KOYAMA TAKASHI

IPC: F04C29/06 ,  F04C23/02

公开(公告)号：JPH0674154A

公开(公告)日：1994-03-15

申请号：JP22693292

申请日：1992-08-26

Applicant: MATSUSHITA REFRIGERATION

Inventor： KOYAMA TAKASHI ,  YOSHIMURA TAKAO ,  AKASHI HIRONARI ,  INAGAKI KO ,  KITA ICHIRO ,  YAHIKI JIYUNICHIROU

IPC: F04B39/00 ,  F04B39/12

Abstract: PURPOSE:To maintain the rigidity of a container and prevent resonance for lower noise by forming a communication part of a suction part with the container at the mode part of a resonance mode generated in a closed container. CONSTITUTION:In a closed container 2, a mechanical part 6 and a motor part 7 are stored, at the lower part of which lubricating oil is gathered. A communication part of a suction part 18 formed at the mechanical part 6 with the closed container 2 is positioned on a plane surface which passes through the center of gravity of the plane surface where a sectional area is roughly the maximum at the horizontal cross section of the container 2, and passes through its center and is roughly at right angles to a line segment (a) where the distance between the inner walls of the container 2 is minimum, a plane surface which passes through its center and is roughly at right angles to a line segment (b) between the inner wall surfaces of the container 2 which is roughly at right angles to the line segment (a) on a horizontal plane surface, or a plane surface which passes through its center and is roughly at right angles to a line segment (c) which is the maximum distance between the inner wall surface in the perpendicular direction of the container 2 and the oil level of the lubricating oil 17. It is thus possible to prevent the excitation of a frequency resonance mode which is a problem of the resonance generated in the container 2, from being generated, preventing noise from being increased by the generation of resonance noise.