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公开(公告)号：US20230003426A1
公开(公告)日：2023-01-05
申请号：US17782363
申请日：2020-12-02
发明人： Kenta MORI , Hirotaka KAWABATA , Hiroto HAYASHI , Masanobu GONDO
摘要： In a hermetic refrigerant compressor, a thrust bearing (e.g., thrust ball bearing (210)) is provided on a thrust surface (136) of a main bearing (134). One end of a sliding surface of the main bearing (134), the one end being closer to a compression chamber (133) than an opposite end of the sliding surface, is a first end, and the opposite end of the sliding surface is a second end. A distance between a center axis of the compression chamber (133) and the second end of the sliding surface (sliding surface lower end (139)) of the main bearing (134) is a distance L, and a distance between the center axis of the compression chamber (133) and the first end of the sliding surface (sliding surface upper end (138)) of the main bearing (134) is a distance La. When the distance L is in a range of 38 mm to 51 mm, the distance La is less than or equal to 16 mm.
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公开(公告)号：US20230003425A1
公开(公告)日：2023-01-05
申请号：US17779859
申请日：2020-11-25
摘要： Lubricating oil has a kinematic viscosity in a range of 1 mm2/S to 7 mm2/S at 40° C., has a mass average molecular weight in a range of 150 to 400, and contains 0.5% by mass or more of a high molecular weight component. The high molecular weight component has a mass molecular weight of greater than or equal to 500. A crankshaft serving as a shaft part of a compression element includes a main shaft that includes a sliding surface. In a case where the sliding surface is a single sliding surface, a length of the single sliding surface in an axial direction is a single sliding length L, whereas in a case where the sliding surface is divided into a plurality of sliding surfaces, a length of one of the sliding surfaces in the axial direction, the one sliding surface having a least length in the axial direction among the plurality of sliding surfaces, is the single sliding length L, and a ratio L/D of the single sliding length L to an external diameter D of the main shaft is less than or equal to 2.0.
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公开(公告)号：US11306708B2
公开(公告)日：2022-04-19
申请号：US17041273
申请日：2019-03-27
发明人： San Haw Chong , Kevin Kai Wei Teo
摘要： A hermetic compressor is disclosed. The hermetic compressor comprises compressing unit and an electromotive unit. The compressing unit comprises: a cylinder block having a compression chamber; cylinder head having a discharge chamber which is controllably couplable to the compression chamber; a discharge muffler body portion and a discharge muffler cover which form a discharge muffler chamber coupled to the discharge chamber; a piston configured to compress a refrigerant in the compression chamber; and a main frame having a least one mounting leg. The electromotive unit comprises: a stator; a rotor; and a crankshaft coupled to the rotor. The electromotive unit is configured such that rotary motion of the rotor relative to the stator causes rotation of the crankshaft which drives the piston to compress the refrigerant in the compression chamber. The compressing unit is coupled to the stator of the electromotive unit and supported by the at least one mounting leg of the main frame and the discharge muffler cover.
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公开(公告)号：US10961996B2
公开(公告)日：2021-03-30
申请号：US15505018
申请日：2016-05-27
发明人： Ko Inagaki , Takahiro Kondou , Yasuhiro Bonkobara
摘要： A closed compressor includes: a compressor body; and a closed vessel in which the compressor body is accommodated and oil is stored. The compressor body has an electric element and a compression element that is driven by the electric element. The compression element has a cylinder block that forms a cylinder, a piston that performs a reciprocating motion in the cylinder, and a crankshaft that actuates the piston. The cylinder block configures a bearing that pivotally supports the crankshaft. The cylinder forms a compression chamber. The compressor body has a support that forms a curved surface. A contact portion, at which the curved surface comes into contact with a receiving surface in the closed vessel, is formed.
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公开(公告)号：US10371134B2
公开(公告)日：2019-08-06
申请号：US14383447
申请日：2013-04-12
IPC分类号： F16C19/10 , F04B39/00 , F25B1/00 , F04B35/04 , F04B39/02 , F16C35/06 , F16C35/07 , F16C23/08 , F16C27/06 , F16C33/58 , F04B27/04 , F25B31/00
摘要： A sealed compressor comprises a sealed container (101) which accommodates an electric component (105) and a compression component (106); wherein the compression component (106) includes a shaft (110) including a main shaft section (111) and an eccentric shaft section (112), a cylinder block (114), a piston (126), and a main bearing unit (120) mounted to the cylinder block (114) and supporting the main shaft section (112) such that the main shaft section (112) is rotatable, a thrust ball bearing (132) mounted to a thrust surface (130) of the main bearing unit (120); and the thrust ball bearing (132) includes a plurality of balls (134) held in a cage (133), an upper race (135) having main surfaces one of which is in contact with upper portions of the balls (134); and a lower race (136) having main surfaces one of which is in contact with lower portions of the balls (134) and; a restricting means for restricting a displacement of the upper race (135) with respect to the shaft (110).
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公开(公告)号：US10352312B2
公开(公告)日：2019-07-16
申请号：US14655663
申请日：2014-01-20
发明人： Ko Inagaki , Masanori Kobayashi , Yu Haraki , Yoshinori Ishida
摘要： A hermetic compressor (100) includes an electric element (110), a compression element (112), and a hermetic container (102). The compression element includes a shaft (118), a cylinder block (124), a piston (136), a connection section (144), and an oil supply mechanism (130). The piston has a columnar seal section (160) in sliding contact with an inner peripheral face of the cylinder, two extension sections (162) that have circular arc faces each having the same radius as a radius of the seal section and extend from the seal section to the bottom dead center side in the axial direction with a circumferential gap therebetween, and a columnar capture section (164) that extends further toward the bottom dead center side than the extension section and has a smaller radius than the radius of the seal section.
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公开(公告)号：US11236740B2
公开(公告)日：2022-02-01
申请号：US14912745
申请日：2014-08-27
发明人： Ko Inagaki , Masanori Kobayashi , Hiroyuki Kawano
摘要： Sealed container (102) houses electric unit (110) equipped with stator (114) and a rotor (116), and compression unit (112) disposed above electric unit (110). Compression unit (112) includes shaft (118) that includes main shaft portion (120) and eccentric shaft portion (122), and cylinder block (124). Compression unit (112) further includes connection portion (136) that connects piston (128) reciprocatively inserted into cylinder (130) and eccentric shaft portion (122), and a thrust bearing that supports a load of shaft (118) in a vertical direction. The thrust bearing includes an upper race in contact with a flange portion of shaft (118), a lower race in contact with a thrust surface of cylinder block (124), and a rolling element. An overall height of sealed container (102) is sized not to exceed a length six times larger than a diameter of piston (128).
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公开(公告)号：US20210123426A1
公开(公告)日：2021-04-29
申请号：US17256032
申请日：2019-06-25
发明人： Hiroto HAYASHI , Hirotaka KAWABATA , Terumasa IDE , Hironari AKASHI , Masanobu GONDO , Akio YAGI
摘要： A hermetic refrigerant compressor (100) includes a sealed container (101) in which lubricating oil (103) having a kinematic viscosity in a range of 1 to 9 mm2/S at 40° C. is stored, the lubricating oil (103) containing a sliding modifier that is either sulfur or a sulfur-containing compound. A compression element (107) includes a shaft part that is a crank shaft (108). In a case where a sliding surface of a main shaft (109) is a single sliding surface, a length of the single sliding surface in an axial direction is a single sliding length L, whereas in a case where the sliding surface is divided into a plurality of sliding surfaces, a length of one of the sliding surfaces in the axial direction, the one sliding surface having the least length in the axial direction among the plurality of sliding surfaces, is the single sliding length L, and a ratio L/D of the single sliding length L to an external diameter D of the main shaft (109) is less than or equal to 0.51.
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公开(公告)号：US20210108627A1
公开(公告)日：2021-04-15
申请号：US17041273
申请日：2019-03-27
发明人： San Haw CHONG , Kevin Kai Wei TEO
摘要： A hermetic compressor is disclosed. The hermetic compressor comprises compressing unit and an electromotive unit. The compressing unit comprises: a cylinder block having a compression chamber; cylinder head having a discharge chamber which is controllably couplable to the compression chamber; a discharge muffler body portion and a discharge muffler cover which form a discharge muffler chamber coupled to the discharge chamber; a piston configured to compress a refrigerant in the compression chamber; and a main frame having a least one mounting leg. The electromotive unit comprises: a stator; a rotor; and a crankshaft coupled to the rotor. The electromotive unit is configured such that rotary motion of the rotor relative to the stator causes rotation of the crankshaft which drives the piston to compress the refrigerant in the compression chamber. The compressing unit is coupled to the stator of the electromotive unit and supported by the at least one mounting leg of the main frame and the discharge muffler cover.
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公开(公告)号：US20210062798A1
公开(公告)日：2021-03-04
申请号：US16616043
申请日：2018-05-21
发明人： Hironari AKASHI , Kazuhiro YOKOTA
摘要： A sealed refrigerant compressor (10A) accommodates an electric component (20A) and a compression component (30) in a sealed container (11). A crankshaft (40) included in the compression component (30) includes a main shaft part (41) and an eccentric shaft part (42). A main shaft part (41) is secured to a rotor (22A) of the electric component (20A). The rotor (22A) is provided with a balance adjustment means such as a balance hole (27), which adjusts an unbalanced load caused by the structure of the main shaft part (41).
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