公开(公告)号：JPH05128942A

公开(公告)日：1993-05-25

申请号：JP28844291

申请日：1991-11-05

Applicant: MATSUSHITA REFRIGERATION

Inventor： IWAI HARUHIKO ,  ONO TAKESHI ,  MIYOSHI KYOZO

IPC: H01H29/16 ,  H01H37/52

Abstract: PURPOSE:To eliminate fusion of a contact to easily cut out an electric circuit so as to safely protect a motor winding by providing conductive liquid and an electrode instead of a contact. CONSTITUTION:A bimetallic strip 22, fixed electrode 23, bead glass 24, movable electrode 25, a part of first lead wire 26, a part of second lead wire 27 and conductive liquid 28 (for example, mercury) are enclosed in a sealing container 21 made of a glass tube. In ordinary operation of a compressor, the bimetallic strip is not actuated, the electrode 25 is dipped in the liquid 28, and an electric current flows through the lead wire 26, electrode 23, liquid 28, electrode 25, bimetallic strip 22 and lead wire 27 in sequence. When the bimetallic strip operates, at, the time of compressor malfunction, to lift the electrode 25 above a liquid level 29 of the liquid 28, the electrode 25 is separated from the liquid 28 to cut out an electric circuit and fusion is not caused between the liquid 28 and the electrode 25. Accordingly, a motor winding can be safely protected.

公开(公告)号：JPH0599148A

公开(公告)日：1993-04-20

申请号：JP25339291

申请日：1991-10-01

Applicant: MATSUSHITA REFRIGERATION

Inventor： MANGYO MASAO ,  WADA SATOSHI ,  ONO TAKESHI

IPC: F04B39/02

Abstract: PURPOSE:To further increase efficiency, in a closed type motor-operated compressor used in a refrigerator. CONSTITUTION:A ball bearing 25 pivotally supporting a crankshaft 24 is provided and an oil discharge hole 27 of the crankshaft is formed. Further, an oil stopper 29 situated to a crank eccentric part 27 is provided and the oil stopper 29 is disposed facing the oil delivery hole 27. This constitution causes foggy oil 33a to fall on a rolling part.

公开(公告)号：JPH0510262A

公开(公告)日：1993-01-19

申请号：JP16274591

申请日：1991-07-03

Applicant: MATSUSHITA REFRIGERATION

Inventor： MANGYO MASAO ,  ONO TAKESHI ,  KITA ICHIRO

IPC: F04B39/00 ,  F04B39/12 ,  F16F15/06

Abstract: PURPOSE:To obtain a hermetic type compressor which is used for a refrigerator, etc., and has the quiet operation sound by devising the shape of a sealed container and the installation of parts. CONSTITUTION:A supporting device 24 consists of a suspension spring 25, cylindrical snap bar 26, and a snap bar stay 27 which is formed to the sperical surface which is nearly equal to the spherical surface of a sealed container 20 and whose edge part is fixed with the snap bar. Further, the snap bar stay 27 adheres to the spherical surface of the sealed container 20 by welding.

公开(公告)号：JPH0510260A

公开(公告)日：1993-01-19

申请号：JP16274691

申请日：1991-07-03

Applicant: MATSUSHITA REFRIGERATION

Inventor： MANGYO MASAO ,  ONO TAKESHI ,  TSUCHIYA KOICHI

IPC: F04B39/00 ,  F04B39/12

Abstract: PURPOSE:To reduce noise of a hermetic type compressor used for a refrigerator, etc., by suppressing the pulsation of the discharged gas and eliminating the blow-back of the intake gas. CONSTITUTION:A bellows shaped flexible cap 31 is installed in a discharge chamber 30, and arranged, keeping a gap from a communicating pipe 35, and a suction hole 37 is formed on an intake muffler 39, and opened and closed by a reed 38.

公开(公告)号：JPH0466794A

公开(公告)日：1992-03-03

申请号：JP18087290

申请日：1990-07-09

Applicant: MATSUSHITA REFRIGERATION

Inventor： NAKAOKA MASASHI ,  MIYOSHI KYOZO ,  YOSHIDA SHIRO ,  SAKAMAKI SABURO ,  ONO TAKESHI ,  TSUCHIYA KOICHI ,  IWAI HARUHIKO

IPC: F04C29/00

Abstract: PURPOSE:To obtain good electrical insulating properties by forming one side of the end of the coil of the stator of an induction motor at a high stage and the other side at a low stage, and disposing the low stage on the side of the induction motor in contact with refrigerating machine oil, which induction motor drives a compression element. CONSTITUTION:The coil of the stator 2 of an induction motor 4 comprises a low-stage coil end 42a to which a small amount of molding of a coil end is allocated and a high-stage coil end 42b to which a large amount of molding of the coil end is allocated. The low-stage coil end 42a is disposed on the side of refrigerating machine oil 25 containing a refrigerant. The length by which the coil of the induction motor 4 is immersed in the refrigerant-contained refrigerating machine oil 25 is thereby reduced. The amount of electricity that leaks from the coil of a charged portion to a sealed container is thus reduced.

公开(公告)号：JP2001317459A

公开(公告)日：2001-11-16

申请号：JP2000134598

申请日：2000-05-08

Applicant: MATSUSHITA REFRIGERATION

Inventor： ONO TAKESHI

IPC: F04B39/00

Abstract: PROBLEM TO BE SOLVED: To reduce noise of a hermetic compressor by reducing radiation of compressed refrigerant gas leaked to a cavity part of a piston pin on a problem of generating the noise of a 500 Hz area as an excitation source of a resonance sound of a space part in a sealed vessel. SOLUTION: A communicating hole 30 for communicating the cavity part 23 of the piston pin 19 and the inside of the sealed vessel in an upper dead center vicinal position of a piston 9, is arranged in a cylinder 8.

公开(公告)号：JPH11351144A

公开(公告)日：1999-12-21

申请号：JP16101198

申请日：1998-06-09

Applicant: MATSUSHITA ELECTRIC IND CO LTD ,  MATSUSHITA REFRIGERATION

Inventor： KONISHI YASUFUMI ,  ASAIDA YASUHIRO ,  FUJIWARA NORIYUKI ,  WADA SATOSHI ,  HANEDA AKIRA ,  ONO TAKESHI

IPC: F01N1/02 ,  F04B39/00

Abstract: PROBLEM TO BE SOLVED: To provide a muffler for a compressor capable of improving the efficiency of the compressor by reducing pressure resistance in a cooling medium passage, while maintaining silencing effect. SOLUTION: A muffler for a compressor includes a first noise silencing room 1 connected to a piston via a communication pipe 4 and a second silencing room 2 partitioned from the first silencing room 1 into upper and lower parts with a partition plate 5, an entrance 7 provided at the side of a nearly boundary position between the first silencing room 1 and the second silencing room 2, a cooling medium passage 3 bent after moving straight a given distance from the entrance 7 and ranging to an exit, the exit 8 communicating with the first silencing room 1, and a silencing hole 6 provided on the way of the straight portion 10 of the cooling medium passage 3 and communicating with the second silencing room 2, wherein the bent portion 11 of the cooling medium passage 3 is curved to communicate with the first silencing room 1.

公开(公告)号：JPH1162827A

公开(公告)日：1999-03-05

申请号：JP22461997

申请日：1997-08-21

Applicant: MATSUSHITA ELECTRIC IND CO LTD ,  MATSUSHITA REFRIGERATION

Inventor： ASAIDA YASUHIRO ,  ONO TAKESHI

IPC: F04B39/00

Abstract: PROBLEM TO BE SOLVED: To provide a muffler of a hermetic compressor which effectively suppress a noise caused by a pulsatory sound generated from a compressive part of the hermetic compressor. SOLUTION: One end of a communication pipe 3 of a muffler A installed in an inhaling path of a coolant, is opened to the inside of a compressor through an upper space 1, and the other end is opened to a compressive part. The coolant is passed from the inside of the compressor to the compressive part through the communication pipe 3, and thereby a pulsatory sound generated from the compressive part is attenuated by a resonant noise-reducing structure between a resonance chamber 6 and a resonance hole 7 opened thereto. An opened sectional area S and a hole length (l) of the resonance hole 7 are formed, as they satisfy the relation; f=(c/2π)√(S/V1), against a resonance frequency (f) inside the compressor. When the pulsatory sound enters at the speed of sound (c) from the resonance hole 7, having the sectional area S and the length (l) against the volume V of the resonance chamber 6, a component of the resonance frequency (f) inside the compressor is attenuated by the resonance, to thereby suppress a noise generation caused by the resonance frequency (f) of the compressor.

公开(公告)号：JPH05133327A

公开(公告)日：1993-05-28

申请号：JP29117691

申请日：1991-11-07

Applicant: MATSUSHITA REFRIGERATION

Inventor： KOYAMA TAKASHI ,  YOSHIMURA TAKAO ,  AKASHI HIRONARI ,  MANGYO MASAO ,  ONO TAKESHI ,  KITA ICHIRO ,  YAHIKI JIYUNICHIROU

IPC: F04B35/01 ,  F04B35/00 ,  F04B39/00

Abstract: PURPOSE:To reduce vibration in mechanical and motor parts so as to prevent generation of noise by balancing inertia force and centrifugal force by a piston, connecting rod, etc., with centrifugal force of balance weights in upper and lower parts in dynamic balance. CONSTITUTION:Each coefficient value of coefficients C1 to C3 in formulas I to III is designed so as to obtain 3 or less. In the formula, the alphabet X represents a distance between planes I and II, and the alphabet Y represents a distance between planes II and III. Further, the formula represents resultant force by inertia force of a piston 10, inertia force and centrifugal force of a connecting rod 12 and centrifugal force of a crank eccentric part 11a by Fa, centrifugal force of an upper part balance weight 18 by Fb and centrifugal force of a lower part balance weight 19 by Fc. The plane I represents a plane vertical to a crankshaft 11 passing through a center axis of the piston 10, and planes II, III represent planes vertical to the crankshaft 11 passing through the center of gravity of the upper/lower part balance weights 18, 19 of a rotor. In this way, generation of noise according to vibration in mechanical and motor parts can be suppressed.

公开(公告)号：JPH05126047A

公开(公告)日：1993-05-21

申请号：JP28843491

申请日：1991-11-05

Applicant: MATSUSHITA REFRIGERATION

Inventor： ONO TAKESHI ,  IWAI HARUHIKO ,  MIYOSHI KYOZO

IPC: F04B39/00

Abstract: PURPOSE:To prevent accidents due to the failures of terminal sections caused by poor insulation and sparks at a space between the conductive pins of a feeder section and a space between each lead wire pulled out of an electric motor and each connecting section of the conductive pins in the inside of a hermetic container for a hermetic type motor driven compressor. CONSTITUTION:A device is made up of magnets 11 fixed around the periphery of an open section 3 which is a part of the inside of a hermetic container 1 in the feeder section 4 of a hermetic type motor driven compressor equipped with an electric motor 2 and a compression means.