公开(公告)号：JPH03217687A

公开(公告)日：1991-09-25

申请号：JP1143590

申请日：1990-01-19

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAKAI TOSHIKAZU

IPC: F04C18/356

Abstract: PURPOSE:To improve sliding condition of a contact part and to increase durability of a compressor by forming a vane housed in the groove of a cylinder, whose tip slides with the outer periphery of a roller, with an alloy steel including specific materials. CONSTITUTION:A roller 3 installed to the eccentric part of a shaft 2 which is rotated by a motor is rotated while contacting with the inner surface of a cylinder 4 and the tip of a vane 6, and the gas in the cylinder 4 is compressed. In this case, the vane 6 is reciprocated in the groove of the cylinder 4. The vane 6 is formed of an alloy steel including a total sum 10 to 30wt.% of vanadium, chromium, molybdenum, and tungsten, 0.5 to 15wt.% of cobalt, and 0.5 to 2 wt.% of carbon. By such a composition, the sliding condition of the contact of the vane and the roller, and the vane and the cylinder, can be improved, and the durability of the compressor can be further increased.

公开(公告)号：JPH03172596A

公开(公告)日：1991-07-25

申请号：JP30982089

申请日：1989-11-29

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAKAI TOSHIKAZU

IPC: F04C18/356

Abstract: PURPOSE:To make improvements in wear resistance in a vane and followability by means of weight reduction by forming the vane housed in a cylinder groove, and brought in sliding contact with the outer circumference of a roller with a specific material, in a compressor using a specific compressed gas. CONSTITUTION:A compressor being applied to a refrigerating plant or the like uses refrigerant 1.1.1.2 tetrafluoroethane uninclusive of chlorine in a molecule as compressed gas in order to protect the atmosphere. A roller 3 attached to a eccentric part of a shaft 2 being rotated by a motor rotates as contacting with the inner circumference of a cylinder 4 and the tip of a vane 6, so that gas in this cylinder 4 is compressed. At this time, the vane 6 reciprocates in a groove of this cylinder 4. In the above constitution, the vane 6 is formed with a ceramics material making titanium boride a main ingredient. With this constitution, improvement in wear resistance of the vane 6 and followability owing to weight reduction can be thus achieved.

公开(公告)号：JPH02191888A

公开(公告)日：1990-07-27

申请号：JP1235289

申请日：1989-01-20

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAKAI TOSHIKAZU

IPC: F04C18/02

Abstract: PURPOSE:To improve volumetric efficiency suppressing leakage between scrolls by introducing fluid to a suitable part in the inside of a bellow supporting a slider and eliminating leakage to a back pressure chamber. CONSTITUTION:Closed space 6 communicates with a bellows 11 by a copper pipe 10, and the bellows 11, by increasing its internal pressure to a value approaching the delivery pressure, lifts a slider 7 pressing a turning scroll 2 to a fixed scroll 1. Force of the bellows 11 lifting the slider 7 is generated by a difference between a pressure in a back pressure chamber 8 and the delivery pressure. While by welding the copper pipe 10 to a block 4, leakage is suppressed to the back pressure chamber 8 from inside a shell 9. The slider 7 can be lifted without generating leakage of fluid to the back pressure chamber 8.

公开(公告)号：JPH01253587A

公开(公告)日：1989-10-09

申请号：JP8159688

申请日：1988-04-01

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAKAI TOSHIKAZU ,  TSUDA YOSHIYUKI

IPC: F04B39/06 ,  F04B39/12 ,  F04C29/04

Abstract: PURPOSE:To reduce the heat conduction quantity to the compressed gas in a cylinder and improve the compression efficiency by arranging heat insulating plates between bearings supporting the shaft of a rotor eccentrically rotatably stored in the cylinder of an enclosed type compressor and the cylinder. CONSTITUTION:A roller 6 stored in the cylinder 7 of a compressor section via a shaft 5 fixed to a rotor 4 is eccentrically rotated by the drive of a motor constituted of a stator 3 and the rotor 4 stored in an enclosed shell 2 in an enclosed type compressor used for an air conditioner or the like. The gas to be compressed sucked through an intake pipe 10 is compressed and discharged through a discharge pipe. In this case, heat insulating plates 11 and 12 made of a stainless plate or the like are inserted between the main and auxiliary bearings 8 and 9 supporting the shaft 5 and the cylinder 7 respectively. The heat conduction quantity to the compressed gas in the cylinder 7 is thereby reduced, the pressure increase to the compressed gas is prevented, the compression efficiency is improved.

公开(公告)号：JP2001311088A

公开(公告)日：2001-11-09

申请号：JP2000129137

申请日：2000-04-28

Applicant: MATSUSHITA REFRIGERATION

Inventor： SASABE SHIGERU ,  SAKAI TOSHIKAZU

IPC: F25B1/00 ,  C09K5/04 ,  C10M105/48 ,  C10M129/10 ,  C10M137/04 ,  C10N20/02 ,  C10N30/00 ,  C10N40/30

Abstract: PROBLEM TO BE SOLVED: To provide a freezer having excellent compatibility with HFC, capable of sufficiently securing reliability of a compressor and actualizing a viscosity of refrigerating machine oil to attain a high efficiency, slightly causing formation of an organic acid by hydrolysis and thermal decomposition and controlling a generated CO2 to a level not to exert a bad influence on cooling performances. SOLUTION: In a freezing cycle constituted of a compressor 1, a condenser 2, an expansion mechanism 3, a dryer 5 and an evaporator 4 and using a hydrofluorocarbon as a refrigerant, a refrigerating machine oil 6 comprising a carbonate oil having 2-70 cSt viscosity at 40 deg.C and 1-9 cSt viscosity at 100 deg.C and containing at least one carbonate bond (-O-CO-O-) in the molecule as a base oil is used to provide the objective freezer capable of sufficiently securing reliability of a compressor and actualizing a viscosity of refrigerating machine oil to attain a high efficiency, slightly causing formation of an organic acid by hydrolysis and thermal decomposition and controlling a generated CO2 to a level not to exert a bad influence on cooling performances and having excellent compatibility with an insulating material.

公开(公告)号：JP2001305128A

公开(公告)日：2001-10-31

申请号：JP2000120791

申请日：2000-04-21

Applicant: MATSUSHITA REFRIGERATION

Inventor： YAMADA MUNETAKA ,  SAKAI TOSHIKAZU

IPC: G01N33/30 ,  F25B49/02

Abstract: PROBLEM TO BE SOLVED: To provide a method by which the deterioration of lubricating oil, such as the engine oil, turbine oil, refrigerating machine oil, etc., can be detected with high accuracy and a refrigerating system for which whether or not the fault of the system is caused by low-pressure gas leakage can be discriminated. SOLUTION: In the method, the deterioration of lubricating oil is detected with high accuracy by using the characteristic ultraviolet-absorbing peak of a resulted product of deterioration contained in the lubricating oil. Since a low-pressure gas leakage detecting means 6 using the method is provided in the refrigerating system composed of a compressor 1, a condenser 2, an expanding mechanism 3, and an evaporator 4 to detect the quantity of a product of oxidative deterioration of the lubricating oil dissolved in the oil, the presence/ absence of mixed air in the refrigerating system caused by the gas leakage from a low pressure-side pipeline can be confirmed and whether or not a fault is caused by low-pressure gas leakage can be discriminated.

公开(公告)号：JP2000161210A

公开(公告)日：2000-06-13

申请号：JP2000014522

申请日：2000-01-24

Applicant: MATSUSHITA REFRIGERATION

Inventor： NAKAMA HIROTO ,  TAKAICHI KENJI ,  SAKAI TOSHIKAZU

IPC: F04B39/02 ,  F04B35/00 ,  F04B49/10

Abstract: PROBLEM TO BE SOLVED: To eliminate a danger of leakage and an electric shock by detecting two-layer separation installed in a lower part of an oiling part and a heater brought into close contact with a sealed casing. SOLUTION: A shaft 2 rotates by torque of a motor part 10 to move a piston 5 to compress a refrigerant in a compression chamber 7 formed of a sub-bearing 3, a bearing 4 and a cylinder 6. A temperature of a horizontal hermetic compressor rises by compression heat and heating of the motor part 10. The compressed refrigerant performs clooling by a refrigerating system, and returns to the compressor. The refrigerant and ester refrigerating machine oil are supplied to a machine part through an oiling device 8 for lubrication. The compressor becomes a high temperature by heating at refrigerant compressing time and heating of the motor part 10 by a repetition of operation, and the ester base refrigerating machine oil and the refrigerant are dissolved so as to eliminate two-layer separation. At compressore reducing time, a temperature/pressure in the compressor lower so as to deposit a refrigerant layer 13.

公开(公告)号：JP2000145640A

公开(公告)日：2000-05-26

申请号：JP29507699

申请日：1999-10-18

Applicant: MATSUSHITA REFRIGERATION

Inventor： TAKAICHI KENJI ,  NAKAMA HIROTO ,  SAKAI TOSHIKAZU

IPC: F04B39/02 ,  C10M105/32 ,  C10M171/00 ,  C10N40/30 ,  F04B39/00 ,  F04B49/10 ,  F25B1/00

Abstract: PROBLEM TO BE SOLVED: To prevent leak current caused by electric insulation of refrigerating machine oil by storing a machine part and a motor part in a closed casing of a hermetic compressor, by sealing HFC refrigerant and ester refrigerating machine oil in the closed casing, and by arranging a means for solving the two-layer separation. SOLUTION: A heater 14 is installed in a hermetic compressor, a controller 15 for energizing the heater 14 is arranged, and an insulation resistance sensor 16 is attached to the bottom of a feed pipe 8 of the compressor. An ester refrigerating machine oil layer 12 of a volume resistivity value 1013 Ω cm or more forms a two-layer separated state from a HFC-134a layer 17. The shaft 2 rotates by a rotary force of the motor part 10, moves the piston 5, and compresses the refrigerant in the compressor 7. The compression heat and the heat generation of the motor part 10 raise the temperature of the hermetic compressor. The compressed refrigerant cools in the cooling system and returns to the compressor again. The refrigerant HFC-134a and the ester refrigerating machine oil are fed to a machine part through the oil feeder 8.

公开(公告)号：JPH11101529A

公开(公告)日：1999-04-13

申请号：JP26319897

申请日：1997-09-29

Applicant: MATSUSHITA REFRIGERATION

Inventor： HIRATSUKA SATOSHI ,  SAKAI TOSHIKAZU

IPC: F25B31/00

Abstract: PROBLEM TO BE SOLVED: To provide a compressor for replacement which does not depend on a bad influence due to the hydrolysis of refrigerating machine oil to a cooling system or the influence of detergent for a piping including chlorine when the compressor of the cooling system is replaced by a new one and repaired in the cooling system which uses the compressor, a refrigerant composed of hydrocarbon fluoride and ester synthetic oil. SOLUTION: In a compressor 1 for replacement, refrigerating machine oil composed of ether synthetic oil or carbonate synthetic oil 12 is previously sealed. A bad influence to a cooling system such as the clogging of a capillary due to sludge generated by the hydrolysis of the refrigerating machine oil is prevented, so that the durability of the cooling system can be improved. Detergent including chlorine high in its cleaning effect is used for cleaning a piping so that operating time can be decreased.

公开(公告)号：JPH10204458A

公开(公告)日：1998-08-04

申请号：JP936697

申请日：1997-01-22

Applicant: MATSUSHITA REFRIGERATION

Inventor： NOZUE AKIHIRO ,  SAKAI TOSHIKAZU ,  SASABE SHIGERU

IPC: C10M105/06 ,  C10M105/18 ,  C10M105/48 ,  C10N20/00 ,  C10N20/02 ,  C10N30/04 ,  C10N40/30

Abstract: PROBLEM TO BE SOLVED: To obtain a refrigerator oil, capable of maintaining the durability of a compressor without depositing an oligomer or a carboxylic acid metallic salt, etc., dissolved in a refrigerator oil ever when a nonester-based low-viscosity refrigerator oil is applied to a reciprocating hermetically closed type electric compressor in order to raise the efficiency and prevent hydrolysis. SOLUTION: A refrigerator oil, consisting essentially of a nonester-based synthetic oil having /sec kinematic viscosity at 40 deg.C and containing >=20wt.% component having 1400 deg.C boiling point compounded therewith can be used to thereby maintain the durability of a compressor without depositing an oligomer or a carboxylic acid metallic salt, etc., near a discharging chamber or a discharging valve due to no complete evaporation of the component having >=400 deg.C boiling point in the refrigerator oil in the discharging chamber and due to the discharge together with the refrigerant while dissolving the oligomer or carboxylic acid metallic salt therein. A carbonate-based synthetic oil or an ether-based synthetic oil is preferred as the nonester-based synthetic oil.