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公开(公告)号：JP2000337254A
公开(公告)日：2000-12-05
申请号：JP14795599
申请日：1999-05-27
Applicant: MATSUSHITA REFRIGERATION
Inventor： MOTEGI MANABU , OZAKA MASAHIKO , KUBOTA AKIHIKO , SUMIYA MASAHIRO
IPC: F04B39/00
Abstract: PROBLEM TO BE SOLVED: To improve assembly work efficiency and to prevent the deformation of a receptacle body with a lead-in rib formed by providing one of receptacle bodies of a synthetic resin intake muffler connected to the suction side of a compression element, with the tapered lead-in rib at the mutual assembly opening in a closed type motor-driven compressor. SOLUTION: A closed type motor-driven compressor used for an electric refrigerator or the like is constituted by accommodating a compression element and a motor element for driving it, in a closed container, and provided with an intake muffler including synthetic resin receptacle bodies, on the suction side of the compression element. The intake muffler comprises first to third receptacle bodies 10-12 respectively formed by injection-molding polybutylene terephthalate. A tapered lead-in rib 13 is integrally formed at the first receptacle body 10, and when the first receptacle body 10 is assembled into the second receptacle body 11, the deformation of the second receptacle body 11 is corrected by the presence of the tapered lead-in rib 13 to improve assembly workability of the first and second receptacle bodies 10, 11 and to prevent the flexural deformation of the receptacle body 10.
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公开(公告)号：JPH11303748A
公开(公告)日：1999-11-02
申请号：JP10910298
申请日：1998-04-20
Applicant: MATSUSHITA REFRIGERATION
Inventor： KUBOTA AKIHIKO , OZAKA MASAHIKO
Abstract: PROBLEM TO BE SOLVED: To maintain a refrigeration oil feed to a scraping part of a compression element so as to reduce a noise in a hermetic electric compressor that is loaded, e.g. into an electric refrigerator. SOLUTION: An oil feed pipe 5 comprising a centrifugal pump 5a and a concentric revolving part 5b is attached to a bottom tip of a crankshaft 4 so that only the concentric revolving part 5b revolves in refrigeration oil. Accordingly, the agitation of the refrigeration oil and a noise thereof are prevented. Also, by a gas vent 7 being formed in the oil feed pipe 5, a gas layer that inhabits a refrigeration oil feed is vented into the outside of the oil feed pipe 5 and thus the refrigeration oil feed to a scraping part of a compression element is maintained.
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公开(公告)号：JPH10318143A
公开(公告)日：1998-12-02
申请号：JP13078097
申请日：1997-05-21
Applicant: MATSUSHITA REFRIGERATION
Inventor： KATAOKA YOSHITO , MOTEGI MANABU , OZAKA MASAHIKO , SASANO HIROSHI
IPC: F04B39/00
Abstract: PROBLEM TO BE SOLVED: To provide a hermetic motor-driven compressor which can prevent occurrence of abnormal noise caused by intermittent contact of a connecting rod with a washer due to inclination of a bearing and a shaft. SOLUTION: In this hermetic motor-driven compressor, when a connecting rod and a U-like washer 17 are inserted in a hollow part 16 of a piston 6, the washer 17 abuts with the hollow part 16 at four points 16a, 16b, 16c, 16d while a clearance is held between the connecting rod and the U-like washer 17, and the washer 17 is formed in such a shape that it is curved toward the connecting rod in the vicinity of the piston pin 19. Accordingly, an effect for damping the vertical motion of the connecting rod can be exhibited so as to prevent occurrence of resonation of the U-like washer 17, and therefore, exciting force transmitted from the piston and the cylinder is decreased so as to prevent occurrence of abnormal sound.
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公开(公告)号：JPH07298579A
公开(公告)日：1995-11-10
申请号：JP8156694
申请日：1994-04-20
Applicant: MATSUSHITA REFRIGERATION
Inventor： MIYOSHI KYOZO , SAEKI YUJI , OZAKA MASAHIKO
Abstract: PURPOSE:To provide a highly efficient single-phase induction motor at low cost. CONSTITUTION:In a single-phase induction motor 11 comprising a main coil 12 and an auxiliary coil 13, a circuit 15 for changing capacitance of the capacitor is connected to the auxiliary coil 13 in series. The capacitance of the capacitor of the circuit 15 of the operating capacitor is controlled with a capacitance control part 18. In the circuit 15 for the operating capacitor, at least two or more circuits wherein an operating capacitor 16 and switches 17 and 17' are connected in series are connected in parallel. A signal is transmitted from an external temperature sensor 19 to the capacitance control part 18.
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公开(公告)号：JPH04284189A
公开(公告)日：1992-10-08
申请号：JP4475291
申请日：1991-03-11
Applicant: MATSUSHITA REFRIGERATION
Inventor： KAWAI HIDEKI , WADA SATOSHI , OZAKA MASAHIKO
Abstract: PURPOSE:To provide a sealed type compressor which generates low noise and is free from the vibration of the case of the compressor by attaching a vibration suppressing member at the vibration part of the case and converting the vibration energy of the case to the thermal energy. CONSTITUTION:A sealed type compressor case 1 and a vibration-suppressing member 9 attached on the vibration part of the case 1 are provided.
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Patent Agency Ranking
公开(公告)号：JPH04191477A
公开(公告)日：1992-07-09
申请号：JP31860290
申请日：1990-11-22
Applicant: MATSUSHITA REFRIGERATION
Inventor： OZAKA MASAHIKO , WADA SATOSHI
Abstract: PURPOSE:To restrict abnormal vibration of the refrigerant gas even if the refrigerant gas is left under the condition possible to generate abnormal vibration by forming a connecting pipe for connecting a suction chamber of a cylinder head and a suction muffler with at least more than two connecting pipes having different length. CONSTITUTION:A suction muffler 35, which is housed in a sealed container with an electric power element and a compressing element, is communicated with a suction chamber 40 through a connecting pipe 37. In this case, the connecting pipe 37 consists of three connecting passages 37a-37c having different length and cross-sectional area, and one end of each connecting passage 37a-37c is opened in a small space 38 inside of the suction muffler 35 at different positions from each other in the axial direction. Even if one of the connecting passages 37a-37c has a natural frequency mode inappropriate for the flow of the refrigerant gas under the some condition and has a danger to generate abnormal vibration of the refrigerant gas, since at least one connecting passage of others has the other natural frequency mode, abnormal vibration of the refrigerant gas is restricted.
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公开(公告)号：JPH03237289A
公开(公告)日：1991-10-23
申请号：JP3066990
申请日：1990-02-10
Applicant: MATSUSHITA REFRIGERATION
Inventor： OZAKA MASAHIKO , KAWAI HIDEKI , NISHIHARA HIDETOSHI , SAEKI YUJI , ARIMIZU KOJI
Abstract: PURPOSE:To obtain a compact two-cylinder rotary compressor of low noise by simplifying a muffler so as to release discharge flow from each compression chamber with phase difference in the muffler. CONSTITUTION:A crankshaft 22 is provided with a first and a second eccentric shafts 23, 24 with approximately 180 deg. phase in the eccentric direction. A first middle plate 28 is provided with a first discharge opening 30 for the passing of discharge flow from a first compression chamber 29, and a first cylinder 31 is provided with a first communicating hole 33 for leading the discharge flow to a muffler 32. A second middle plate 34 is provided with the first communicating hole 33 for the passing of discharge flow from the first compression chamber 29, and the first communicating hole 33 is communicated with a second communicating hole 35. A non-rotor side housing 36 is provided with a second discharge opening 38 for the passing of discharge flow from a second compression chamber 37 as well as with a release hole 39 communicated with the second communicating hole 35 so as to release discharge flow from the first compression chamber 29 to a muffler 32. A second cylinder 40 forms the second compression chamber 37 together with the second middle plate 34 and the non-rotor side housing 36 and is provided with the second communicating hole 35 for communicating the first communicating hole 33 and the release hole 39.
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公开(公告)号：JPH03179191A
公开(公告)日：1991-08-05
申请号：JP31617689
申请日：1989-12-05
Applicant: MATSUSHITA REFRIGERATION
Inventor： ARIMIZU KOJI , KAWAI HIDEKI , NISHIHARA HIDETOSHI , OZAKA MASAHIKO
IPC: F04C29/00 , F04C18/356
Abstract: PURPOSE:To form a nitride layer easily as well as to improve the extent of abrasion resistance by constituting a vane, whose tip part is made elastically contact with a roller eccentrically rotating in a cylinder, in having a nitriding applied to steel or sintered alloy containing a specified quantity of C, Cr, and Mo, V both or one side, respectively. CONSTITUTION:A vane is made up of having a nitriding applied to steel or sintered alloy containing both of C: 0.5-1.6%, Cr: 1.5-10% and Mo: 0.2-1.2%, V: 0.2-1.2% or either side in terms of wt.%. A first layer 9 is formed in a surface layer part at the vane tip and a second layer 10 is formed in the lower part, and this first layer is of a compound layer using Fe-Cr-N, made up of having N acted on Fe, Cr of base material, as a chief ingredient, and it is of top high hardness, little in a friction factor and excellent in abrasion resistance. The second layer 10 uses Cr of a base metal 6 as a base material whereby a diffuse reaction of N is developed, and it is of structure that a third compound 11 is reticulated and molybdenum carbide of a first compound is dotted around. With this constitution, excellent abrasion resistance, less in wear in a roller or the like, is brought into full play.
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公开(公告)号：JPH0375451A
公开(公告)日：1991-03-29
申请号：JP21332189
申请日：1989-08-18
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIHARA HIDETOSHI , KAWAI HIDEKI , OZAKA MASAHIKO , ARIMIZU KOJI , SAEKI YUJI
Abstract: PURPOSE:To obtain a highly efficient and low cost refrigeration cycle system by providing the system with a check valve between a vaporizer and a compressor and providing a rotary compressor with a permanent condenser type driving motor. CONSTITUTION:A check valve 9 is provided between a vaporizer 4 and a compressor 19 and a differential pressure valve 5 operated by the difference in a pressure between the check valve 6 and the rotary compressor 19 is provided between a capillary tube 3 and a condenser 2. The rotary compressor 19 is provided with a permanent condenser type driving motor 20. When the operation of the rotary compressor 19 is stopped, the check valve 6 is closed and an inner pressure is increased by the counterflow of a high pressure gas from the rotary compressor 19. A change in the pressure thus generated opens a differential pressure valve 5 and the heated high pressure gas is charged in the rotary compressor 19 and the condenser 2, the inflow of the gas to the capillary tube 3 and the vaporizer 4 being obstructed. Thus, a highly efficient and low cost refrigeration cycle system is obtained.
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公开(公告)号：JPH02267383A
公开(公告)日：1990-11-01
申请号：JP8890089
申请日：1989-04-07
Applicant: MATSUSHITA REFRIGERATION
Inventor： SASANO HIROSHI , KAWAI HIDEKI , OTA TOSHIHIKO , OZAKA MASAHIKO
Abstract: PURPOSE:To reduce heat transfer from a closed container and a compression element to sucked gas by forming a suction pipe, connected air-tight to the closed container and a compression element stored in the container, of a material with small conductivity. CONSTITUTION:A stator 3 constituting an electric drive element 2 and a compression element 4 are fixed in a closed container 1. Also, a crankshaft 6, on which a rotor 5 is fixed, is provided in the stator 3 in the same axis as the closed container 1. In addition, a suction pipe 7 is passed air-tight through the closed container 1 and connected air-tight to the compression element 4. With this constitution, the suction pipe 7 is formed of a material with small heat conductivity, for example, a stainless steel. And, heat transfer from the compression element 4 and the closed container 1 heated by hot and high-pressure refrigerant gas to the sucked gas passing through the suction pipe 7 can be reduced by utilizing the material of the suction pipe 7.
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