公开(公告)号：DE69309425T2

公开(公告)日：1997-07-10

申请号：DE69309425

申请日：1993-01-29

Applicant: MATSUSHITA REFRIGERATION

Inventor： KOYAMA TAKASHI ,  YOSHIMURA TAKAO ,  AKASHI HIRONARI ,  MANGYO MASAO ,  OHNO TAKESHI ,  KITA ICHIRO ,  YABIKI JUNICHIRO

IPC: F04B35/04 ,  F04B39/00 ,  H02K7/04

公开(公告)号：DE69302549D1

公开(公告)日：1996-06-13

申请号：DE69302549

申请日：1993-08-26

Applicant: MATSUSHITA REFRIGERATION

Inventor： KOYAMA TAKASHI ,  YOSHIMURA TAKAO ,  AKASHI HIRONARI ,  INAGAKI KOH ,  KITA ICHIRO ,  YABIKI JUNICHIRO

IPC: F04B39/00 ,  F04B39/12

Abstract: A compressor includes a sealed casing (2) which accommodates therein a compressing unit (6) for compressing a refrigerant and a driving unit (7) for driving the compressing unit. An induction pipe (18) is provided in the sealed casing for introducing the refrigerant into the compressing unit. The induction pipe has an outlet end communicating with the interior of the compressing unit and an inlet end which is opened to space in the sealed casing at a position which may correspond to a node of a standing wave of the refrigerant in the sealed casing.

公开(公告)号：JP2000297756A

公开(公告)日：2000-10-24

申请号：JP10793099

申请日：1999-04-15

Applicant: MATSUSHITA REFRIGERATION

Inventor： KANESHIRO KENJI ,  KITA ICHIRO ,  UMEOKA IKUTOMO

IPC: F04B39/00 ,  F04B39/12

Abstract: PROBLEM TO BE SOLVED: To reduce the noise generated by the resonance of an air-tight vessel and leg by restraining the resonance mode of the hermetic vessel and also restraining the gang resonance of bottom surface and leg, on the hermetic electric compressor used for a home refrigerator. SOLUTION: By arranging ribs 20, 21 spreading over a side surface 18, corner 17 and bottom surface 16 radially against the bottom surface 16 in a lower shell 3, the resonance mode of the bottom surface 16 is restrained and the noise generated by the resonance of the bottom surface 16 can be reduced. By sticking the leg 22 to the ribs 20, 21, the gang resonance of the bottom surface 16 and leg 22 is restrained and the noise generated from the leg 22 can be reduced.

公开(公告)号：JP2000291560A

公开(公告)日：2000-10-17

申请号：JP9631099

申请日：1999-04-02

Applicant: MATSUSHITA REFRIGERATION

Inventor： UMEOKA IKUTOMO ,  KITA ICHIRO ,  KANESHIRO KENJI

IPC: F04B39/12

Abstract: PROBLEM TO BE SOLVED: To suppress noise by enhancing the rigidity of a closed case in regard to a closed type electrically driven compressor to be used for a domestic refrigerator. SOLUTION: In a closed case 2 formed of a first dome shaped case 3, and of a second dome shaped case 4, either one of the cases 3, 4 is formed with plural curved surfaces 24 and 27, ridges 21, 22 and 25 formed out of the plural curved surfaces 24 and 27, are formed roughly in the radial direction, and the circumferential direction so as to let the radial ridges 22 and 25 be formed into an area roughly from the center point 23 of the case 3 to a place close to the circumferential ridge 21, and concurrently, from the circumferential ridge 21 until a place close to a circular opening part 26. By preventing the radial ridges 22 and 25 from approaching, each curved surface is complexly divided into small parts, and concurrently since the mutually adjacent curved surfaces 24 and 27 are held by the ridges 22 and 25 in the radial direction, the closed case 2 high in rigidity can thereby be obtained.

公开(公告)号：JPH11230038A

公开(公告)日：1999-08-24

申请号：JP2811598

申请日：1998-02-10

Applicant: MATSUSHITA REFRIGERATION

Inventor： FUKUI SHIGENOBU ,  OKADA KOJI ,  KITA ICHIRO ,  UMEOKA IKUTOMO ,  HAMANE TOKUHITO ,  NASU HITOSHI ,  KUBOTA TADASHI

IPC: F04B39/00

Abstract: PROBLEM TO BE SOLVED: To apply high rigidity to a shell, to make it hardly resonated, to damp its vibration, and to reduce its noise by providing irregular parts on the shell. SOLUTION: Many irregular parts are concentratedly provided at necessary positions on a shell. The irregular parts may be formed on the whole face of the shell, or they may be formed only at the positions where resonance is considered to occur easily and vibration damping and silencing are required for shape designing. The irregular parts may have a spherical shape, i.e., a dimple shape, a dish-like embossed shape, a ridge-like rib shape, or a lattice shape. The thickness of the recesses and projections of the shell is nearly equal to the thickness of the portion having no irregular parts, and the rigidity of the whole shell is increased and resonance rarely occurs due to the irregular parts, thus the plate thickness of the shell can be made thinner. The surface area of the shell is increased by the irregular parts, and its radiation effect is increased.

公开(公告)号：JPH10318147A

公开(公告)日：1998-12-02

申请号：JP12663597

申请日：1997-05-16

Applicant: MATSUSHITA REFRIGERATION

Inventor： TANAKA YASUHIKO ,  UMEOKA IKUTOMO ,  KITA ICHIRO ,  ODA MASATAKA

IPC: F04B39/00 ,  F04B39/10 ,  F04B39/12

Abstract: PROBLEM TO BE SOLVED: To improve muffling performance and suction efficiency, by adding to a lead valve one or both of acoustic resonance energy determined by sizes of a suction hole and a reflecting plate and acoustic resonance energy determined by size of a branch pipe, and by controlling vibration amplitude. SOLUTION: In a compressing process when a piston 12 lifts up, a lead valve 15 closes, the suction gas in a duct 17 is blocked rapidly, the internal pressure increases, and the refrigerant gas flows from an opening 19' into a refrigerant passing branch pipe 19. In a next suction process, the pressure in a cylinder becomes negative, immediately the refrigerant gas is supplied from the refrigerant passing branch pipe 19 and is charged into the cylinder effectively. In addition, using energy generated at an acoustic resonance frequency determined by the length of a branch pipe 19, vibration amplitude of the lead valve 15 is controlled. When opening/closing timing of the lead valve is suitable in relation to the rotational angle of a crankshaft 9, vibration amplitude of the lead valve becomes larger cause by acoustic energy, the amount of the charged gas increases, and therefore, muffling performance is improved.

公开(公告)号：JPH10318145A

公开(公告)日：1998-12-02

申请号：JP12663797

申请日：1997-05-16

Applicant: MATSUSHITA REFRIGERATION

Inventor： TANAKA YASUHIKO ,  UMEOKA IKUTOMO ,  KITA ICHIRO ,  ODA MASATAKA

IPC: F04B39/10 ,  F04B39/12

Abstract: PROBLEM TO BE SOLVED: To increase the charging amount into a cylinder, and maintain and improve performance, by placing a lead valve and a reflecting plate having a flowing hole in a duct between a suction hole and a suction muffler, and by controlling vibration amplitude of the lead valve with acoustic resonance energy between the suction hole and the reflecting plate. SOLUTION: A suction muffler 17 is connected with a suction hole 14 through a duct 18. A reflecting plate 19 having a flowing hole 20 is placed on the way of the duct 18. Pressure wave generated during opening/closing of a lead valve 15 propagates through the duct 18, and its part reflects on the reflecting plate 19 and propagates toward a lead. Then, acoustic resonance depending on sizes of the reflecting plate 19 and the suction hole 14 is provided. By adding resonance energy by adjusting the sizes when the lead valve 15 which vibrates at substantially a first natural frequency just starts opening, vibration amplitude of the lead valve 15 increases, the suction gas amount increases, and performance is improved.

公开(公告)号：JPH10318138A

公开(公告)日：1998-12-02

申请号：JP12663697

申请日：1997-05-16

Applicant: MATSUSHITA REFRIGERATION

Inventor： TANAKA YASUHIKO ,  UMEOKA IKUTOMO ,  KITA ICHIRO ,  ODA MASATAKA

IPC: F04B39/00 ,  F04B39/10 ,  F16K47/02

Abstract: PROBLEM TO BE SOLVED: To maintain fluidity of a refrigerant gas to improve muffler performance, by providing a part of a duct between a suction hole and a suction muffler with a reflecting plate having partially a flowing hole, and by opening a sealing closet which passes part of the suction gas from the reflecting plate to the suction hole side using a branch pipe. SOLUTION: A duct 18 from a suction hole 14 of a cylinder block 7 to a suction muffler 17 is equipped with a reflecting plate 22 having a flowing hole 23, a branch pipe is formed between the reflecting plate 22 and the suction hole 14, and a sealing closet is connected with the end of the branch pipe. In a suction process, a refrigerant gas flows from the suction muffler 17 into a cylinder through the duct 18. In a compressing process, a lead valve 15 closes, a gas in the duct 18 is suddenly blocked, the internal pressure increases, and therefore, the gas is filled into the sealing closet through the branch pipe. The gas continues to flow upward, the gas in the sealing closet flows into the duct 18 as soon as the next suction process begins. Because the flow of the suction gas becomes continuous and suction efficiency is improved, muffling performance of the suction muffler 17 is improved.

公开(公告)号：JPH10299652A

公开(公告)日：1998-11-10

申请号：JP10881897

申请日：1997-04-25

Applicant: MATSUSHITA REFRIGERATION

Inventor： TANAKA YASUHIKO ,  UMEOKA IKUTOMO ,  KITA ICHIRO ,  ODA MASATAKA

IPC: F04B39/00 ,  F04B39/10 ,  F04B39/12

Abstract: PROBLEM TO BE SOLVED: To relive the discontinuity of a refrigerant gas flow generated according to the opening and closing of a reed valve which opens and closes a suction hole, and also controls the vibration amplitude of the read valve. SOLUTION: A closed small chamber 9 is opened through a branch pipe in a pipe line 18 between a suction port 14 and a suction muffler 17. When a reed valve 15 is closed, gas is led into the closed chamber once and, when the reed valve 15 is opened again, the gas in the small chamber is made to flow out immediately so as to reduce the sucking delay and increase suction efficiency. Also a sound resonance energy determined by the specifications of the closed small chamber and the branch pipe is used so as to control the amplitude of the reed valve to increase the performance and efficiency.

公开(公告)号：JPH10205451A

公开(公告)日：1998-08-04

申请号：JP1216697

申请日：1997-01-27

Applicant: MATSUSHITA REFRIGERATION

Inventor： TANAKA YASUHIKO ,  KITA ICHIRO ,  UMEOKA IKUTOMO

IPC: F04B39/00

Abstract: PROBLEM TO BE SOLVED: To facilitate assembling by providing a connecting rod having a small end connected to a piston and a large end connected to a crankshaft respectively, and performing assembling of the divided connecting rods through engagement of a dovetail groove with a dovetail. SOLUTION: A connecting rod 19 of a reciprocating piston compressor has one end connected to a piston through a small end hole 51 on a small end 50, and the other end connected to an eccentric shaft of a crank shaft through a large end hole 53 of a large end 52. A tapered dovetail 54 is formed on an end of a rod 56 of the small end 50, while a dovetail groove 55 is formed on the large end 52. A clamp member 57 is arranged for preventing vertical movement of the small end 50 and the large end 52. It is inserted into an engagement recession 58 and an engagement groove 59 formed on upper and lower surfaces over the dovetail 54 and the dovetail groove 55 from the transverse direction. The clamp member 57 is substantially U-shaped. The connecting rod 19 is assembled by inserting the dovetail 54 into the dovetail groove 55, and press-fitting the clamp member 57 to the engagement recession 58 and the engagement groove 59 from the transverse direction.