公开(公告)号：JP2001200788A

公开(公告)日：2001-07-27

申请号：JP2000008913

申请日：2000-01-18

Applicant: MATSUSHITA REFRIGERATION

Inventor： KAWABATA JUNTA ,  MORITA ICHIRO ,  INAGAKI KO ,  ISHIDA TAKANORI ,  KATAYAMA MAKOTO ,  HAYASHI AKIRA

IPC: F04B35/04 ,  H02K7/14

Abstract: PROBLEM TO BE SOLVED: To prevent such reliability reduction that a compressor is stopped by abrasion power of a sliding part biting into the sliding part, in a vibration type compressor used for a refrigerating cycle. SOLUTION: This device is provided with a communicating pipe 14, whose one end is opened to a compression chamber 9, and the other end is opened to the high pressure side of a system, and an opening/closing valve 15 attached to the opening part of the compression chamber 9 side of the communicating pipe 15, refrigerant gas of the high pressure side of the system rapidly and directly flows into the compression chamber 9 when an operation of the compressor is stopped, thereby, even if abrasion powder is produced on the sliding part, the abrasion powder stuck on the sliding part is discharged. Thus the abrasion powder can be prevented from sticking on the sliding part, and reliability reduction which results in the compressor stoppage can be prevented.

公开(公告)号：JP2000291549A

公开(公告)日：2000-10-17

申请号：JP9857999

申请日：1999-04-06

Applicant: MATSUSHITA REFRIGERATION

Inventor： HIRATSUKA SATOSHI ,  ISHIDA TAKANORI

IPC: F04B39/00

Abstract: PROBLEM TO BE SOLVED: To prevent occurrence of abnormal abrasion at a bearing part. SOLUTION: Since a bearing part, formed out of the upper end part 21 of a bearing 9 made of an aluminum alloy, and of a thrust washer 32 has a kind of a bearing part composed of parallel flat plates, a fluid film formed by lubricating oil with a squeeze effect, is hardly formed to cause metal contact on a sliding surface. In this case, the sliding of the metallic contact of an upper end surface 21 with the non-adhesive film 31 formed over the surface of the steel parent material 32 of the thrust washer 30, thereby prevents aluminum forming the upper bearing 9 from being adhered to the thrust washer 30. As a result, since there are no abrasive starting point, the occurrence of abnormal abrasion can thereby be prevented.

公开(公告)号：JP2000120540A

公开(公告)日：2000-04-25

申请号：JP28908498

申请日：1998-10-12

Applicant: MATSUSHITA REFRIGERATION

Inventor： ISHIDA TAKANORI ,  HIRATSUKA SATOSHI

IPC: F04B39/00

Abstract: PROBLEM TO BE SOLVED: To reduce starting failure caused by uneven contact and abrasion of a thrust sliding part as well as preventing the damage of the thrust sliding part caused by thrust washer by arranging an annular groove on a shaft flange surface corresponding to a protrusion of the thrust washer fixed to a flange surface of a shaft. SOLUTION: An annular thrust washer 19 is interposed between a flange surface 18 and an upper end surface of a bearing part 15, and is provided with a protrusion extending upward so as to fix to a shaft 16. An annular groove 21 is formed on a flange surface 18 of a balance plate 17 of a shaft 16 corresponding to the protrusion 20. A width of the groove 21 is set larger than that of the protrusion 20. The groove 21 and the protrusion 20 are fitted to each other, and the thrust washer 19 is fixed to a flange surface 18 of the shaft 16. As a result, movement in a diameter direction of the thrust washer 19 is regulated, an inner circumferential surface of the thrust washer 19 is brought into contact with a journal surface of the shaft 16, and abrasion is prevented from generating by bite effect.

公开(公告)号：JPH10325654A

公开(公告)日：1998-12-08

申请号：JP13211197

申请日：1997-05-22

Applicant: MATSUSHITA REFRIGERATION

Inventor： ISHIDA TAKANORI ,  SAKAI TOSHIKAZU ,  SASABE SHIGERU ,  NOZUE AKIHIRO ,  HIRATSUKA SATOSHI

IPC: F24F7/06 ,  F25B49/02

Abstract: PROBLEM TO BE SOLVED: To reduce the possibility of ignition of combustible gas by a method wherein a gas discharging device, constituted of a frame, supporting a sheet unit for covering a refrigerating and air-conditioning instruments as well as a working space, an air suction port and an air discharging port, which are opened in the sheet unit, and an explosion-proofing type fan, connected to an exhaust duct connected to the air discharging port, is installed. SOLUTION: A gas discharging device is constituted of a sheet 1, covering a refrigerator 8 and a working space 7, and a frame 2, supporting the sheet 1 from the inside thereof, while the device occupies an area, sufficient to the bottom area of the refrigerator 8 and a working space 7. An air suction port 3 is installed on the upper side of the sheet 1 and an air discharging port 4 is installed on the lower side of the sheet while an exhaust duct 5 is connected to the air discharging port 4. The exhaust duct 5 is connected to an explosion- proofing type fan 6 and the outlet port of the exhaust duct 5 is installed so as to be faced to the outside of a building. During repairing work, the explosion-proofing type fan 6 is rotated at all times to discharge HC refrigerant, remaining and staying in the sheet 1, forcibly to the outside of the building through the air discharging port 4, the exhaust duct 5, the explosion-proofing type fan 6 and the exhaust duct 5. According to this method, affection to the ignition of HC refrigerant is reduced and the safety of repairing work can be improved.

公开(公告)号：JPH09222082A

公开(公告)日：1997-08-26

申请号：JP5679796

申请日：1996-02-19

Applicant: MATSUSHITA REFRIGERATION

Inventor： ISHIDA TAKANORI

IPC: F04B39/00

Abstract: PROBLEM TO BE SOLVED: To reduce incurring of the slide loss of a compressor and to improve durability of a compressor by a method wherein a slide material is made proper and an oil film is easily formed, in a compressor being used in a refrigerating device and an air-conditioner wherein the compressor uses 1, 1, 2- tetrafluoroethane as gas to be compressed. SOLUTION: In an element of which a compressor 1 consists, a plurality of oil grooves consisting of a radial groove formed in a traingular shape are attached to the upper end surface of a bearing 14 formed of an aluminum alloy, and a thrust support 15 on the surface of which nickel compound plating mixed with 10-35volume% polyvinyl tetrafluoroehtyleneparticulates is formed is attached between a rotor 3 and a bearing 14. This constitution improves the lubrication and wear characteristics of the slide surface of the thrust support and a bearing and improves the efficiency and durability of a compressor.

公开(公告)号：JPH07305680A

公开(公告)日：1995-11-21

申请号：JP9617394

申请日：1994-05-10

Applicant: MATSUSHITA REFRIGERATION

Inventor： ISHIDA TAKANORI

IPC: F04B39/00

Abstract: PURPOSE:To achieve decrease of abrasion of a connecting rod in using of refrigerant having inferior lubricity by forming a piston pin by hardened steel, and applying ceramic coating harder than a silicon grain on the front surface. CONSTITUTION:When a shaft 2 pressed in a rotor 3 is rotated by a motor composed of the rotor 3 and a stator 4, a connecting rod 5 attached on the eccentric part of the shaft 2 is rotated, and the rotational motion of the shaft 2 is transmitted, thereby the piston 7 reciprocates in the cylinder 6. Refrigerant HFC-134a is sucked and compressed in a space 9 formed by the piston 7 and the cylinder 6. When the connecting rod 5 is constituted of aluminum alloy containing silicon of 14 to 30wt.%, a piston pin 10 is formed out of hardened steel, and a material in which ceramic coating having hardness of HV1000 or more is formed for the front surface is used. Thereby, abrasive abrasion on the contact part of the connecting rod with the pin is prevented, and durability can be improved.

公开(公告)号：JP2001200787A

公开(公告)日：2001-07-27

申请号：JP2000008911

申请日：2000-01-18

Applicant: MATSUSHITA REFRIGERATION

Inventor： MORITA ICHIRO ,  KOBAYASHI MASANORI ,  KAWABATA JUNTA ,  INAGAKI KO ,  ISHIDA TAKANORI ,  KATAYAMA MAKOTO ,  HAYASHI AKIRA

IPC: F04B39/00 ,  F04B35/04

Abstract: PROBLEM TO BE SOLVED: To reduce a use amount of a refrigerant as well as preventing reduction of a system efficiency caused by a lubricating oil, in a vibration type compressor used for a refrigerating cycle and the like. SOLUTION: In the vibration type compressor for compressing and delivering a refrigerant by a compression mechanism part, lubricating oil is not used, combustible and natural refrigerants such as propane, isobutane, and carbon dioxide are used as the refrigerant, a gas bearing mechanism or a connecting mechanism having low bending rigidity are provided, and thereby the system efficiency is improved, the use amount of the refrigerant is reduced, and sliding loss is also reduced.

公开(公告)号：JP2001055976A

公开(公告)日：2001-02-27

申请号：JP22965099

申请日：1999-08-16

Applicant: MATSUSHITA REFRIGERATION

Inventor： SUGIMOTO SHUHEI ,  YOSHIMURA TAKAO ,  UMEOKA IKUTOMO ,  AKASHI HIRONARI ,  ISHIDA TAKANORI ,  KATAYAMA MAKOTO ,  TSUBOI KOSUKE

IPC: F04B39/00

Abstract: PROBLEM TO BE SOLVED: To reduce suctioning loss of refrigerant in a muffler and improve efficiency in respect to a hermetically closed type compressor adapted to a household refrigerator. SOLUTION: This hermetically closed type compressor is composed of a motor part, a hermetically closed vessel housing a mechanical part such as a cylinder, a muffler 25, and a suction pipe 29. The muffler 25 has a muffler inlet flow passage 26 communicated with a space inside the hermetically closed vessel, and a muffler outlet passage 27 communicated with the cylinder. The suction pipe 29, muffler inlet passage 26, and muffler outlet passage 27 have the equally sized sectional areas or increasing ones in this order. Refrigerant in the muffler 25 is thus suctioned into the side of the cylinder without receiving passage resistance. It is therefore possible to improve suctioning efficiency and compression efficiency.

公开(公告)号：JP2000320950A

公开(公告)日：2000-11-24

申请号：JP12961699

申请日：1999-05-11

Applicant: MATSUSHITA REFRIGERATION

Inventor： NOZUE AKIHIRO ,  SAKAI TOSHIKAZU ,  SASABE SHIGERU ,  ISHIDA TAKANORI ,  HIRATSUKA SATOSHI

IPC: F25D23/00

Abstract: PROBLEM TO BE SOLVED: To provide a refrigerator to obtain high reliability on explosion proofness, in an indirect cooling refrigerator using a hydrogen carbide refrigerant. SOLUTION: A cooler 21, an adsorbent to absorb HC, a decomposition catalyst to decompose HC, and a heater 32 to heat the decomposition catalyst, are situated in a circulation air passage 28 through which air is circulated through a refrigerator. This constitution prevents the refrigerator from being filled with an HC refrigerant since the HC refrigerant is adsorbed and decomposed, reduces a risk of ignition to the HC refrigerant, and provides an effect to enhance reliability.

公开(公告)号：JP2000320911A

公开(公告)日：2000-11-24

申请号：JP12962299

申请日：1999-05-11

Applicant: MATSUSHITA REFRIGERATION

Inventor： SASABE SHIGERU ,  SAKAI TOSHIKAZU ,  NOZUE AKIHIRO ,  ISHIDA TAKANORI ,  HIRATSUKA SATOSHI

IPC: F25B1/00 ,  F25B13/00 ,  F25B43/04

Abstract: PROBLEM TO BE SOLVED: To improve reliability of explosionproof when air is mixed into a freezing cycle owing to bad welding. etc., in the freezing cycle such as a refrigerator and an air conditioner, and the life where hydrocarbon is used as a refrigerant. SOLUTION: In a freezing cycle comprised of a compressor 1, a condenser 2, an expansion mechanism 3, and an evaporator 4, there are provided an oxygen adsorbent 7 comprising reducing iron or activated carbon, a case 8 for containing the oxygen adsorbent 7, and a transparent plate 9 for transmitting oxygen in the freezing cycle and partitioning the oxygen adsorbent 7 and the freezing cycle. Hereby, when air is mixed into the freezing cycle owing to bad welding and the like, oxygen concentration with respect to hydrocarbon in the compressor 1 is prevented from reaching an explosion region, and even when any spark is produced at a stator (not shown) of an electric motor in the compressor 1, fire is prevented from being induced and exploded on the hydrocarbon, whereby there is ensured a freezing cycle having high reliability against explosionproof.