公开(公告)号：JP2001115957A

公开(公告)日：2001-04-27

申请号：JP29507099

申请日：1999-10-18

Applicant: MATSUSHITA REFRIGERATION

Inventor： NOZUE AKIHIRO ,  SAKAI TOSHIKAZU

IPC: F04B39/00 ,  F04C29/00 ,  F25B1/00 ,  H02K3/30

Abstract: PROBLEM TO BE SOLVED: To provide a small-sized, high-efficiency closed type motor-driven compressor using a bared-type motor element, for compressing a coolant including at least ammonia. SOLUTION: In the closed type motor-driven compressor for compressing the coolant including at least ammonia, an insulation material is formed by using at least one kind among a group of polyether sulfonic resin, polysulfonic resin, and polyether imide resin. The insulation material, when it makes direct contact with the coolant, is not dissolved or peeled off. This provides a motor with good dielectric strength to allow the bare-type motor element to be used thus providing the small-sized, high-efficiency closed type motor-driven compressor.

公开(公告)号：JP2001107866A

公开(公告)日：2001-04-17

申请号：JP28651199

申请日：1999-10-07

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAKAI TOSHIKAZU ,  NOZUE AKIHIRO

IPC: F04B39/02 ,  F04B39/00

Abstract: PROBLEM TO BE SOLVED: To improve durability of a hermetic electromotive compressor in an air conditioning system or a refrigerant system using an ammonia refrigerant. SOLUTION: This hermetic electromotive compressor uses refrigerating machine oil including an inclusion of sulfur of 0.01 wt.% or less and comprising hydrocarbon as a main component. Metal corrosion can be prevented by suppressing heat deterioration of ammonia and refrigerating machine oil.

公开(公告)号：JP2000110725A

公开(公告)日：2000-04-18

申请号：JP28623098

申请日：1998-10-08

Applicant: MATSUSHITA REFRIGERATION

Inventor： NOZUE AKIHIRO ,  SAKAI TOSHIKAZU ,  SASABE SHIGERU

IPC: F04B39/00 ,  F04B39/04 ,  F04C29/00 ,  F04C29/02 ,  F25B1/00

Abstract: PROBLEM TO BE SOLVED: To provide a compressor capable of enhancing reliability on durability in a compressor using a CO2 refrigerant. SOLUTION: This compressor compresses and discharges a refrigerant by a compressing mechanism section 2 held in a sealing vessel 1. A CO2 refrigerant is used as the refrigerant, and the sealing vessel 1 is filled with refrigeration oil 25 whose solubility of the CO2 refrigerant is small or which is incompatible with the CO2 refrigerant. This controls the amount of solution of the CO2 refrigerant into the refrigeration oil 25, so that it is possible to reduce risks such as a starting failure like oil foaming or a lubrication failure due to an outstanding decrease of the viscosity of the refrigeration oil.

公开(公告)号：JPH11311244A

公开(公告)日：1999-11-09

申请号：JP11835798

申请日：1998-04-28

Applicant: MATSUSHITA REFRIGERATION

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

IPC: F04B39/00 ,  F16C17/04 ,  F16C33/10

Abstract: PROBLEM TO BE SOLVED: To provide a compressor provided with bearing structure preventing the wear of a thrust sliding face when the internal temperature of the compressor is high and reducing sliding loss of a thrust sliding face when the internal temperature of the compressor is low. SOLUTION: A thrust washer 30 of such structure that contact area decreases with the drop of internal temperature of a compressor and that contact area increases with the rise of internal temperature of the compressor is provided between a flange face 20 and a thrust face 21. With this constitution, the viscosity of refrigerator oil is lowered by the rise of internal temperature of the compressor, and in the case of a thrust sliding face being in a boundary lubricating area from mixing, the contact area increases, so that load per unit area decreases, and an oil film is easily formed to prevent wear. When the viscosity of refrigerator oil is heightened by the drop of internal temperature of the compressor, and in the case of the thrust sliding part being in a fluid lubricating area, the contact area decreases, so that load per unit area increases to reduce sliding loss.

公开(公告)号：JPH11304261A

公开(公告)日：1999-11-05

申请号：JP11467498

申请日：1998-04-24

Applicant: MATSUSHITA REFRIGERATION

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

IPC: F25D11/00 ,  F25B1/00

Abstract: PROBLEM TO BE SOLVED: To improve the reliability of a freezer/refrigerator by preventing the occurrence of foaming in a compressor, namely, the discharge of a lubricant to the outside of the compressor by the foaming particularly when the power supply is made and, at the same time, to prevent the durability deterioration of the compressor due to lubricant deficiency in the compressor. SOLUTION: A freezer/refrigerator is provided with an intra-freezer temperature detecting means 2 which detects the temperature in the freezer of the freezer/refrigerator, a heating means 4 which is positioned to heat a lubricant 19 melted by means of a refrigerant in the bottom section of a compressor 1, and a control means 3 which controls the heating means 14 to secure a required amount of lubricant in the compressor 1 based on the temperature in the freezer detected by means of the detecting means 2. Consequently, the reliability of the freezer/refrigerator can be improved, because the discharge of the lubricant 19 to the outside from the compressor 1 by foaming can be reduced and the required amount of lubricant 19 can be secured in the compressor 1.

公开(公告)号：JPH1182304A

公开(公告)日：1999-03-26

申请号：JP24807497

申请日：1997-09-12

Applicant: MATSUSHITA REFRIGERATION

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

IPC: F04B39/02 ,  C10M169/04 ,  C10N10/12 ,  C10N40/30 ,  F04C29/02

Abstract: PROBLEM TO BE SOLVED: To provide a reliable refrigerant compressor by optimizing an assembly lubricant used at the time of the assembly of the refrigerant compressor so as to prevent the sliding parts in the refrigerant compressor from being initially worn at the start of the compressor and by suppressing the starting failure of the refrigerant compressor and the occurrence of substances clogging a cooling system. SOLUTION: A refrigerant compressor is structured so that 50 capacity % distillation temperature is 400 deg.C or higher and it uses a synthetic fluid base oil having an ether or carbonate structure in its molecules as an assembly lubricant. In this case, it is better to use the assembly lubricant containing at least one or more organic phosphoric acid compounds of 0.01 to 1.0 wt.% between acid phosphoric acid ester and phosphorous acid ester. Thus the initial wear inside a refrigerant compressor at the start of the compressor can be prevented, and the starting failure and the occurrence of substances clogging a cooling system can be suppressed.

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.

公开(公告)号：JP2000290674A

公开(公告)日：2000-10-17

申请号：JP9631599

申请日：1999-04-02

Applicant: MATSUSHITA REFRIGERATION

Inventor： NOZUE AKIHIRO ,  SAKAI TOSHIKAZU

IPC: C10M105/48 ,  C10M105/32 ,  C10M129/84 ,  C10N30/00 ,  C10N40/30 ,  F25B1/00 ,  F25B43/00

Abstract: PROBLEM TO BE SOLVED: To obtain a refrigerator machine oil to be used in compressor for a refrigeration system, for example, a refrigerator using hydrofluorocarbon as a refrigerant by making the machine oil contain an ester-based synthetic oil as a main component and adding a specific monocarbonate at a specific rate to the refrigerator machine oil. SOLUTION: An ester-based synthetic fluid is made to be included as a main component and a monocarbonate of the formula (R1 and R2 are each a 3-10C hydrocarbon chain) is added 2.8×10-6-2.8×10-4 mole per 1 cm3 of the refrigerator machine oil. This oil suppresses the formation of carboxylic acids by hydrolysis, inhibits the corrosive-wearing of the metal and the copper plating phenomena. In addition, this machine oil secures the dissolution of the reaction products into the hydraulic medium to prevent the capillary tubes from being clogged and increase the lubricity.

公开(公告)号：JP2000274352A

公开(公告)日：2000-10-03

申请号：JP8115799

申请日：1999-03-25

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAKAI TOSHIKAZU ,  SASABE SHIGERU ,  NOZUE AKIHIRO

IPC: F04B35/01

Abstract: PROBLEM TO BE SOLVED: To prevent the connecting part of a piston pin with a connecting rod from being abnormally worn out in a reciprocation type compressor. SOLUTION: At the connecting part of a connecting rod 5 with a piston pin 13, since the connecting rod 5 plays a rocking motion relative to the fixed piston pin 13, a fluid film due to lubricant is hardly formed up, and metals are brought into contact with each other at a part of a sliding surface. At this time, the sliding of a non-coagulant film 14 formed over the surface of the piston pin 13 with the metallic contact part of a connection portion of the connecting rod 5, prevents aluminum forming the connecting rod 5 from being coagulated onto the piston pin 13. As a result, an increase in temperature around the connecting part of the connecting rod 5 with the piston pin 13 is reduced, and restraining lubricant from being removed from the surface thereby prevents the surface from being moved to a dry and frictional condition.