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1.发明公开
公开(公告)号：EP1094100A4
公开(公告)日：2002-10-16
申请号：EP00915341
申请日：2000-04-05
Applicant: MATSUSHITA REFRIGERATION
Inventor： KURACHI MASAO , NAKAGAWA NOBUHIRO , TAKAICHI KENJI , SAKAI HISAKAZU , NOZUE AKIHIRO
IPC: C09K5/04 , F25B9/00 , F25B31/00 , F25B43/00 , C10M103/00 , C10M105/02 , F25B1/00
CPC classification number: F25B9/006 , C09K5/042 , C09K2205/132 , F25B31/002 , F25B43/003 , F25B2400/12 , F25B2500/222
Abstract: In a refrigerant compression type refrigerating system for use in the field of refrigerating/air conditioning employing a hydrocarbon refrigerant containing an odorant, the concentration of the odorant at the time of refrigerant leakage is kept on a sensible level. The refrigerant composition contains at least one ingredient selected among ethane, propane, cyclopropane, propylene, and isobutane. It contains ammonia in an amount of 1 to 60 wt. %, preferably 1 to 20 wt. %, as an odorant.
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公开(公告)号：JP2000111210A
公开(公告)日：2000-04-18
申请号：JP28622998
申请日：1998-10-08
Applicant: MATSUSHITA REFRIGERATION
Inventor： SASABE SHIGERU , SAKAI TOSHIKAZU , NOZUE AKIHIRO
Abstract: PROBLEM TO BE SOLVED: To reduce the quantity of charge of a refrigerant and raise the explosionproofness, by reducing the quantity of remaining oil within sealed container in a freezing system using a hydrocarbon as a refrigerant and using a freezer oil larger in specific gravity than the refrigerant, in an accumulator provided in a freezing system. SOLUTION: This is one which is provided with a oil return hole 4 at the undermost part of the section where the refrigerant outflow pipe 3 is inserted, in an accumulator which is equipped with a sealed container 1, a refrigerant inflow pipe 2 inserted from above the sealed container 1, and a refrigerant outflow pipe 3 inserted from under the sealed container 1, and when a liquid refrigerant high in oil percentage is stored in the lower part and a liquid refrigerant high in refrigerant percentage in the upper part within the sealed container by the fluctuation of the load, the liquid refrigerant high in refrigerant percentage evaporates gradually, and is sent to the refrigerant outflow pipe 3, becoming a gas refrigerant, and the freezer oil in the liquid refrigerant high in oil percentage in the lower part is sent to the refrigerant outflow pipe 3 through the oil return hole in the lowermost part at the refrigerant outflow pipe, whereby the quantity of remaining oil within the sealed container 1 can be reduced and the quantity of charge of the refrigerant can be reduced thereby raising the explosionproofness.
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公开(公告)号：JPH11311181A
公开(公告)日：1999-11-09
申请号：JP11836298
申请日：1998-04-28
Applicant: MATSUSHITA REFRIGERATION
Inventor： SAKAI TOSHIKAZU , SASABE SHIGERU , NOZUE AKIHIRO , ISHIDA TAKANORI , HIRATSUKA SATOSHI
Abstract: PROBLEM TO BE SOLVED: To prevent generation of abnormal wear of a connection part between a piston pin and a connecting rod in the subject compressor. SOLUTION: Since a connecting rod 5 performs reciprocation motion to a fixed piston pin 13 at a connection part between the rod 5 and the pin 13, a fluid film caused by lubricant is hard to generate, leading in generation of metal contact at a part of a sliding surface. At this time, a lubricative film 14 having a frictional coefficient of 0.1 or less formed on a surface of the pin 13 and a metal contact part at the connection part of the rod 5 slide on each other, and accordingly the coefficient is kept to be 0.1 or less. As a result, a temperature increase in the vicinity of the connection part between the rod 5 and the pin 13 is reduced to prevent vaporization of lubricant, resulting in prevention of changeover to a dried frictional condition.
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公开(公告)号：JPH11101517A
公开(公告)日：1999-04-13
申请号：JP26320397
申请日：1997-09-29
Applicant: MATSUSHITA REFRIGERATION
Inventor： SAKAI TOSHIKAZU , SASABE SHIGERU , NOZUE AKIHIRO
Abstract: PROBLEM TO BE SOLVED: To urge the atomization of a refrigerant in an evaporator and improve an evaporation efficiency in a refrigerating system such as a refrigerator. SOLUTION: Non-condensible gas whose condensing temperature is lower by 50 deg.C or more than the condensing temperature of a refrigerant under the condensing pressure of the refrigerant is sealed so as to have 100 to 1000 % of the high pressure side volume of a refrigerating system 6. The high pressure is increased by the non-condensible gas retained in a condenser 8, go that the flow velocity of the refrigerant can be increased without physically restricting a connecting pipe in the inlet of an evaporator 10. Further, the non-condensible gas dissolved in the liquid refrigerant bumps, so that a complete atomization effect can be obtained under a refrigerating condition at low evaporation temperature.
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公开(公告)号：JPH10311628A
公开(公告)日：1998-11-24
申请号：JP11930597
申请日：1997-05-09
Applicant: MATSUSHITA REFRIGERATION
Inventor： SAKAI TOSHIKAZU , SASABE SHIGERU , NOZUE AKIHIRO
IPC: F25B43/04
Abstract: PROBLEM TO BE SOLVED: To enhance the maintenability of the refrigeration cycle for a refrigerator, and the like, employing carbonate based refrigerator oil. SOLUTION: The refrigeration cycle is provided with a liquid coolant container 5 at the outlet of a condenser 2, and a sensor 6 for detecting the quantity of carbon dioxide at the upper of the liquid coolant container 5 in order to store carbon dioxide generated through deterioration of carbonate based refrigerator oil at the upper part of the liquid coolant container 5 and to detect carbon dioxide with high sensitivity. According to the arrangement, blocking of a coolant channel due to carbon dioxide can be detected in the early state and lowering of performance can be avoided by performing maintenance e.g. replacement of coolant or refrigerator oil, before the performance is deteriorated significantly.
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Patent Agency Ranking
公开(公告)号：JPH09304262A
公开(公告)日：1997-11-28
申请号：JP12543696
申请日：1996-05-21
Applicant: MATSUSHITA REFRIGERATION
Inventor： NOZUE AKIHIRO , SAKAI TOSHIKAZU , SASABE SHIGERU
IPC: G01N11/12
Abstract: PROBLEM TO BE SOLVED: To provide a viscometer capable of accurately and rapidly measuring the viscosity of freezing machine oil coexisting with a liquid cooling medium. SOLUTION: A liquid cooling medium and freezing machine oil are sealed in a measuring pipe composed of a transparent pressure-resistant cylinder arranged in an inclined state to be allowed to stand, and a fall sphere 14 composed of a ferromagnetic material is attracted by a permanent magnet 16 to be held at the upstream initial position of an freezing machine oil phase 10 in such a state that a liquid cooling medium phase 12 and the freezing machine oil phase 10 are separated in an equibrium state, and a permanent magnet support rod 18 is attracted by an electromagnet 19 to separate the permanent magnet 16 from the outer wall of a measuring pipe 13 to demagnetize the same and the attraction and holding of the fall sphere 14 is released to allow the sphere 14 to fall. The passing speed of the fall sphere 14 is measured by a passage sensor 15 arranged on the downstream side of the freezing machine oil 10 and the viscosity of the freezing machine oil is measured on the basis of the correlation of the passing speed with viscosity. Since viscosity is measured in such a state that the liquid cooling medium phase 12 and the freezing machine oil phase 10 are separated and allowed to stand, an equilibrium state is not disturbed and an accurate viscosity value is obtained. When viscosity is measured in a thermostatic tank 24, the above mentioned demagnetizing operation can be performed without opening the door of the tank 24.
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公开(公告)号：JPH09303908A
公开(公告)日：1997-11-28
申请号：JP11455296
申请日：1996-05-09
Applicant: MATSUSHITA REFRIGERATION
Inventor： SAKAI TOSHIKAZU , SASABE SHIGERU , NOZUE AKIHIRO
IPC: F25B47/00
Abstract: PROBLEM TO BE SOLVED: To improve a cleaning capability and restrict a residual amount of detergent during a cleaning operation of a freezing system such as a refrigerator or the like. SOLUTION: Detergent is circulated between a storing tank 12 for storing detergent under a liquid state of pressurized condition and a condenser 1 of a freezing system to be cleaned. Supplying of detergent in respect to the condensing device 1 is carried out through a supplying pipe passage 13 and a returning flow of the detergent is performed in a discharging pipe passage 18. the detergent is gasified at a gas-liquid separator 19 within a discharging pipe passage 18 to separate stains in the condenser 1 and the detergent, thereafter gas of detergent is forcedly fed by a pump 20, liquefied by the condensing device 22 and circulated to the storing tank 12. If a three-way valve 16 is closed while the pump 20 is being operated, the detergent within the condenser 1 is gasified and recovered into the storing tank 12. With such an arrangement as above, stain of the detergent can be prevented and a high cleaning capability can be attained and at the same time an amount of residual can be restricted by using detergent having a high volatile characteristic.
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公开(公告)号：JP2002105681A
公开(公告)日：2002-04-10
申请号：JP2000305832
申请日：2000-10-05
Applicant: MATSUSHITA REFRIGERATION
Inventor： NOZUE AKIHIRO
Abstract: PROBLEM TO BE SOLVED: To improve the efficiency of generating ozone in an electrolytic ozone generating device in which moisture in a vapor phase is electrolyzed to generate ozone and to improve the durability of the device. SOLUTION: In an electrolytic cell composed of an anode, a cathode and a solid electrolytic film partitioning them without a gap, the cathode is fed with dry air, so that the removal of moisture in the cathode is effectively performed, and the efficiency of generating ozone is improved. Further, the solid electrolytic film is reinforced with a porous polymer sheet having elasticity such as a polytetrafluoroethylene sheet to improve its durability.
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公开(公告)号：JP2001295765A
公开(公告)日：2001-10-26
申请号：JP2000109375
申请日：2000-04-11
Applicant: MATSUSHITA REFRIGERATION
Inventor： NOZUE AKIHIRO , SAKAI TOSHIKAZU
Abstract: PROBLEM TO BE SOLVED: To provide a closed electric compressor having a hermetic terminal whose durability is enhanced by preventing adhesion of metallic powders to glass, and preventing a spark between a terminal pin and a metallic outer ring to prevent leakage of electricity and damage to the terminal, even if a refrigerant containing ammonium is used. SOLUTION: The closed electric compressor has, inside the sealed container of the metallic outer ring, the hermetic terminal fitted with a protective cover formed of at least one kind selected from the group consisting of polyphenylene sulfides, polysulfones, polyether sulfones, polyether ether ketones, polyether imides, and polyamide imides, so that the protective cover clings to the outer peripheral surface of the terminal pin, the outer peripheral surface of a cylindrical part, and the inner peripheral surface of the metallic outer ring. Even if a refrigerant containing ammonium is used, the protective cover will not dissolve nor drop, so metallic powders will not cling to glass and the closed electric compressor provided with the hermetic terminal having the effect of preventing leakage of electricity and damage to the terminal can be provided.
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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
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.
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