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：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.

公开(公告)号：JPH10170504A

公开(公告)日：1998-06-26

申请号：JP32641696

申请日：1996-12-06

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAKAI TOSHIKAZU ,  SASABE SHIGERU ,  NOZUE AKIHIRO

IPC: G01N33/26 ,  F25B49/02

Abstract: PROBLEM TO BE SOLVED: To enhance the accuracy and the convenience of such a measuring apparatus that quantitatively evaluates a contaminant dissolved in a refrigerator oil. SOLUTION: The inside of a system is vacuum-evacuated, a refrigerator oil, in which a contaminant is dissolved, is then poured into a sample container 11, and a refrigerant is poured into the sample container 11 while it is being pressurized or cooled. Then, a valve 15 and a valve 16 are opened, and the sample container 11, a filter holder 12 and a collection container 13 are connected directly. Then, when the collection container 13 is cooled by a cooling device 14, a mixed solution of the refrigerator oil and the refrigerant is passed through a filter inside the filter holder 12 so as to be collected in the collection container 13. On the basis of a change in the weight of the filter holder 12 or the filter held inside the filter holder 12 before and after a test, a contaminant which is precipitated in the mixed solution of the refrigerator oil and the refrigerant can be evaluated quantitatively.

公开(公告)号：JPH1038423A

公开(公告)日：1998-02-13

申请号：JP19424696

申请日：1996-07-24

Applicant: MATSUSHITA REFRIGERATION

Inventor： SASABE SHIGERU ,  SAKAI TOSHIKAZU ,  NOZUE AKIHIRO

IPC: F25B49/02

Abstract: PROBLEM TO BE SOLVED: To confirm whether or not air is mixed into a freezing system owing to gas leakage from a low pressure side piping and correctly judge whether or not the cause of a trouble is due to low pressure gas leakage by disposing low pressure gas leakage detection means on the freezing system. SOLUTION: A refrigerant is compressed by a compressor 1 and is sent to a condenser 2 through a refrigerant piping 5 where it releases heat into a liquefied one which is in turn fed to an expansion-mechanism 3 through the refrigerant piping 5. The refrigerant is reduced in pressure in the expansion mechanism 3 and is fed to an evaporator 4 through the refrigerant piping 5 where it is cooled by being vaporized, and then it is returned to the compressor 1 through the refrigerant piping 5. Herein, a temperature sensor 6 being low pressure gas leakage detection means is disposed on the high pressure side of the refrigerant piping 5. When a great volume of air is mixed into a freezing system, temperature measured by the temperature sensor 6 greatly exceeds temperature indicated by ordinary working environment conditions of the refrigerant system so that it is confirmed that the great volume of air is mixed in.

公开(公告)号：JPH07139487A

公开(公告)日：1995-05-30

申请号：JP28802793

申请日：1993-11-17

Applicant: MATSUSHITA REFRIGERATION

Inventor： KITA ICHIRO ,  SASABE SHIGERU

IPC: F04C29/04

Abstract: PURPOSE:To provide a compressor where the temperature of a discharge chamber, a compression chamber, a sliding part and the oil is lowered, generation of the oil sludge is eliminated, the oil decomposition is reduced, the abnormal low viscosity of the oil is prevented, the service life is long and the efficiency is excellent. CONSTITUTION:A discharge chamber 11 and a cooling passage 21 are provided in a cylinder head 5, one end of the cooling passage 21 is connected to a heat radiation suction pipe 22 arranged through a sealed container 1, and the other end is connected to a heat radiation discharge pipe 24 arranged through the seled container 1, and a discharge pipe 23 connected to the inside of the sealed container 1 is connected to the heat radiation suction pipe 22 through a heat radiation part 25.

公开(公告)号：JP2001289809A

公开(公告)日：2001-10-19

申请号：JP2001018998

申请日：2001-01-26

Applicant: MATSUSHITA ELECTRIC IND CO LTD ,  MATSUSHITA REFRIGERATION

Inventor： HATTORI AKIYOSHI ,  YOSHIIKE NOBUYUKI ,  INOUE YOSHIKATSU ,  SASABE SHIGERU

IPC: G01N27/12

Abstract: PROBLEM TO BE SOLVED: To realize a gas sensor which is suitable for the use of sensing the freshness and the degree of rotting of vegetable or the like with a higher sensitivity to gases to be detected of a lower concentration (ethylene, ethanol, aldehyde compounds, mercaptan compounds and amine compounds) generated from the vegetable. SOLUTION: There are arranged an insulating substrate 1, a pair of thin-film electrodes 2 provided on the substrate 1 as spaced at a specified interval, a thin film 3 as gas sensing body mainly composed of a specified substance applied on the substrate 1 and the thin-film electrodes 2 and at least a pair of thick film electrodes 4 applied on the thin film 3 as gas sensing body corresponding to the positions of the pair of thin-film electrodes 2. The thin-film electrodes 2 and the thick-film electrodes 4 are formed so as to have a part of the thin film 3 as gas sensing body sandwiched therebetween.

公开(公告)号：JP2001108341A

公开(公告)日：2001-04-20

申请号：JP28133099

申请日：1999-10-01

Applicant: MATSUSHITA REFRIGERATION

Inventor： SASABE SHIGERU ,  SAKAI TOSHIKAZU

IPC: F25D17/06 ,  F25B1/00 ,  F25D11/00

Abstract: PROBLEM TO BE SOLVED: To provide a refrigerator using isobutane as refrigerant in which the possibility of explosion due to firing of isobutene leaked to the inside of a refrigerator can be reduced. SOLUTION: A compressor 9, a condenser 10, an expansion mechanism 11, and an evaporator 8 are coupled sequentially and annularly and isobutene 12 is encapsulated as refrigerant thus establishing a refrigeration cycle for a heat insulation box 2. Operation of the compressor 9 is stopped only when the pressure of refrigerant in the evaporator 8 is negative thus reducing the possibility of explosion due to firing of isobutene 12 leaked to the inside of a refrigerator.

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：JPH07145782A

公开(公告)日：1995-06-06

申请号：JP29515593

申请日：1993-11-25

Applicant: MATSUSHITA REFRIGERATION

Inventor： SASABE SHIGERU ,  KITA ICHIRO

IPC: F04B39/14 ,  F04B39/02

Abstract: PURPOSE:To provide a hermetic compressor which solves the problem points of the prior recovery method of a refrigerant and oil regarding the discarding of a refrigerater and realizes the improvement of the workability of the recovery of the refrigerant and the oil and the improvement of the recovery rate of the oil. CONSTITUTION:Constitution is such that oil is stored at the lower part of the inside of a sealed container 1, and in the inside, a refrigerant is reserved, and at the same time a discharge pipe 17 is provided at the bottom of the sealed container 1, and the discharge pipe 17 is connected to the oil in the sealed container 1, and opening is made so that the tip may become even with the bottom portion of the sealed container 1.

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.