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公开(公告)号：JPH048892A
公开(公告)日：1992-01-13
申请号：JP10905190
申请日：1990-04-25
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAKAOKA MASASHI
Abstract: PURPOSE:To maintain a constant liquid level, whether a closed type compressor is at rest, in operation or otherwise, and improve the reliability of the compressor by making the compressor continuous to a liquid reservoir section at one side thereof via a communication pipe and another pipe fitted with a nonreturn valve. CONSTITUTION:When a closed type compressor is at rest, a refrigerant is dissolved in refrigerator oil 7 in a closed vessel 1, and a liquid level in the vessel 1 increases accordingly. Actually, however, the increased refrigerator oil 7 is made to flow to a liquid reservoir section 4 via a communication pipe 5 fitted at an allowable liquid level, thereby preventing an increase in liquid level. On the other hand, when the compressor is operating, the refrigerator oil 7 is as well carried to a system, together with delivered gas and, therefore, the liquid level drops. In this case, the liquid is made to flow from the liquid reservoir section 4 to the closed vessel 1 having a lower liquid level. In addition, the liquid level in the liquid reservoir section 4 becomes minimum during the operation of the compressor. Even when the liquid level in the vessel 1 increases, therefore, no liquid reversely flows to the liquid reservoir section 4, due to the nonreturn valve of a pipe 6, thereby maintaining a constant liquid level in the closed type compressor.
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公开(公告)号：JPH02272272A
公开(公告)日：1990-11-07
申请号：JP9355389
申请日：1989-04-13
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAKAOKA MASASHI
IPC: F25B43/00
Abstract: PURPOSE:To prevent outflow of a liquid refrigerant from an accumulator and to enable improvement of reliability of a freezing cycle by a method wherein, by means of a difference in specific gravity between a liquid refrigerant and freezer oil, an oil return hole is opened and closed by a vertically moving annular float. CONSTITUTION:During the starting and the restarting of a freezing cycle, a large quantity of a liquid refrigerant flows in an accumulator 1a from a heat exchanger and freezer oil also flows therein, and gathers in the lower space part of a container 2. Specific gravity of a liquid refrigerant is 1.2-1.3, and specific gravity of freezer oil is approximate 0.9. For example, when specific gravity of an annular float 8 is set to 1.0, when there is a large quantity of the liquid refrigerant, the annular float 8 is floated to a stopper 9 by means of specific gravity to close an oil return hole 7. when the liquid refrigerant is gasified and a ratio of freezer oil is increased, the specific gravity difference of the annular float 8 is decreased to zero. The float sinks downward, the oil return hole 7 is opened, and the freezer oil is caused to flow out to an outflow pipe 4 and sucked in a compressor.
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公开(公告)号：JPH01190983A
公开(公告)日：1989-08-01
申请号：JP1391688
申请日：1988-01-25
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIHARA HIDETOSHI , NAKAOKA MASASHI , YAJIMA YUKIO
IPC: F04C18/356
Abstract: PURPOSE:To decrease expansion following the time of a roller by applying a sub-zero treatment to the roller, in the case of a compressor for a refrigerating cycle used in a domestic refrigerator or the like. CONSTITUTION:A sub-zero treatment is applied to a roller 12. Thus because retained austenite can be removed, expansion following the time of the roller can be decreased.
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公开(公告)号：JPS62158795A
公开(公告)日：1987-07-14
申请号：JP170086
申请日：1986-01-08
Applicant: NIPPON MINING CO , KYODO SEKYU , MATSUSHITA REFRIGERATION
Inventor： KAIMAI TAKASHI , KUSAYANAGI SANPO , NAKAOKA MASASHI , SAKAMAKI SABURO
IPC: C10M105/06 , C10M101/02 , C10M111/02 , C10M171/00 , C10N20/00 , C10N30/02 , C10N40/00 , C10N40/30
Abstract: PURPOSE:To provide the titled lubricant having a low viscosity and capable of inhibiting sludge formation, which comprises a particular base oil having a decreased low-boiling fraction content. CONSTITUTION:A flon compressor lubricant comprising an alkylbenzene or a mixed oil of an alkylbenzene and a mineral oil as a base oil, wherein the content of fractions having a boiling point of 330 deg.C (under 1atm) or less of the lubricant is limited to 5vol% or less. The alkylbenzene which can be suitably employed may either have a branched side chain (hard type) or a straight side chain (soft type). A mineral oil of the paraffin group type may be employed. It is preferred that the mixing ratio of alkylbenzene to mineral oil be in the range of about 10:0- about 20:80vol%. When the alkylbenzene is present in an amt. of 20vol% or more, the compatibility with flon and fluidity at low temp. of the lubricant are improved. By the use of the above-mentioned lubricant, a low-viscosity lubrication is ensured, and the sludge formation and adherence around the discharge valve of the compressor can be inhibited.
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公开(公告)号：JPH08170586A
公开(公告)日：1996-07-02
申请号：JP31313694
申请日：1994-12-16
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAKAOKA MASASHI
IPC: F04B39/00 , C09K5/04 , C10M105/04 , C10M105/36 , C10M129/66 , C10M135/00 , C10M137/02 , C10M155/02 , C10M171/02 , C10N20/00 , C10N20/02 , C10N30/00 , C10N30/06 , C10N30/18 , C10N40/30 , F04B39/02 , F25B1/00 , H02K3/30
Abstract: PURPOSE: To solve two-layer separation and oil return by using lubricating oil which takes a hydrocarbon coolant not containing chlorine and fluorine as a principal component and has a viscosity of a specified range at a specified temperature, and the mutual soluble temperature of which is a specified temperature or less. CONSTITUTION: A refrigerating apparatus comprises a compressor, a condenser, an expanding mechanism and an evaporator, and lubricating oil which is mainly composed of a hydrocarbon coolant not containing chlorine and fluorine represented by R-600a, and has a refrigerating machine oil viscosity of 5-1500CSt at 40 deg.C, and the mutual soluble temperature of which is -25 deg.C or less is used in a low temperature refrigerating apparatus such as a refrigerator or the like. Thus, in the whole temperature region of operating environment, lubricating oil and a coolant are kept from two-layer separation, the problem of oil return can be solved, the performance and reliability of the compressor and the refrigerating apparatus can be ensured, and it is also economically advantageous.
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Patent Agency Ranking
公开(公告)号：JPH06123526A
公开(公告)日：1994-05-06
申请号：JP27405292
申请日：1992-10-13
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAKAOKA MASASHI , YAKUSHI SHUICHI , ITO SHINYA
Abstract: PURPOSE:To enable the prevention of troubles of an expansion mechanism part which can be caused by contaminants contained within a refrigerating cycle by providing a filter part having filtering meshes of specified sizes. CONSTITUTION:A filter part 6 having filtering meshes of not less than 30Angstrom -70mum is provided between a condenser 2 and a dryer 3. High temperature, high pressure refrigerant gas which has been compressed by a compressor 1 is made to pass through the condenser 2 in which the refrigerant gas is cooled and liquefied so as to convert into high pressure liquid, and then the liquefied refrigerant passes through the dryer 3 and flows into an expansion mechanism 4, in which the refrigerant converts into wet-vapor, which is evaporated in an evaporator 5 and returns to the compressor 1. Refrigerant and refrigerating machine oil as well as rust-preventing oil, cutting oil and machining oil primarily consisting of mineral oil and used during the assembly of the refrigerating cycle circulate within the refrigerating cycle and pass through the filter part 6 having the filtering meshes of 30Angstrom -70mum. Matters of large molecular sizes insoluble in the refrigerant are removed by a filter 7. Troubles of the expansion mechanism part which can be caused by contaminants in the refrigerating cycle unit is prevented.
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公开(公告)号：JPH05133331A
公开(公告)日：1993-05-28
申请号：JP29549891
申请日：1991-11-12
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAKAOKA MASASHI , TSUCHIYA KOICHI , YAKUSHI SHUICHI , MORI YUJI , NORO TORU , IDE TERUMASA
IPC: F04B39/00
Abstract: PURPOSE:To decrease a temperature rise in an electric component cover by using a material of heat insulation for a fixture of the electric component cover, and providing the electric component cover for covering electric component parts to heat-insulate a closed type electric motor compressor. CONSTITUTION:In an electric component protecting device for a closed type electric motor compressor 1, a steel plate of sandwich structure with plastic in the inside having heat insulation is used for a fixture 4. Or the fixture 4 is brought into contact with the closed type electric motor compressor 1 only by a minimum required limit so that a total unit is covered with an electric component cover 3. Accordingly, by using a material having heat insulation for the fixture 4 for fixing the electric component cover 3 connected to the closed type electric motor compressor 1, heat conduction from the closed type electric motor compressor 1 can be prevented. In this way, also a temperature rise in the electric component cover 3 is decreased to reduce a temperature rise of a shielded wire in the electric component cover 3.
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公开(公告)号：JPS62158794A
公开(公告)日：1987-07-14
申请号：JP169986
申请日：1986-01-08
Applicant: NIPPON MINING CO , KYODO SEKYU , MATSUSHITA REFRIGERATION
Inventor： KAIMAI TAKASHI , KUSAYANAGI SANPO , NAKAOKA MASASHI , SAKAMAKI SABURO
IPC: C10M101/02 , C10M171/00 , C10N20/00 , C10N20/02 , C10N30/02 , C10N40/00 , C10N40/30
Abstract: PURPOSE:To provide the titled lubricant capable of inhibiting the sludge formation and adherence around the discharge valve of a compressor even when it is used for a prolonged period of time, which comprises a particular base oil having a decreasd low-boiling fraction content. CONSTITUTION:A flon compressor lubricant comprising a mineral oil of the paraffin group type or mixed group type as a base oil, wherein the content of fraction having a boiling point of 350 deg.C (under 1atm) or less of the lubricant is limited to 5vol% or less. By the use of this lubricant, the sludge formation and adherence around the discharge valve of a compressor can be inhibited even when it is used for a prolonged period of time and the problem of refrigeration capacity decrease can be obviated.
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公开(公告)号：JPS61153489A
公开(公告)日：1986-07-12
申请号：JP27760084
申请日：1984-12-27
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAKAOKA MASASHI , INATANI MASATOSHI
Abstract: PURPOSE:To form the wall surface of heat transfer tube in which the promoting effect of boiling and heat transfer is contrived by a method wherein the surface is coated with solder or the like and, thereafter, metallic powder body, becoming wick, is cast in. CONSTITUTION:Solder or the like 6, having low melting point, is coated on the wall surface of the heat transfer tube 2 of copper or the like and the metallic fine powder 5, such as copper powder or the like, is connected whereby a porous layer, having an arbitrary thickness, may be obtained by only regulating a gap between a pipe of copper or the like and a core metal of the same. The productivity is good and working is simple since it is made by heating to the melting point of solder or the like, therefore, working in a low temperature is easy and porosity due to the contracting of a metal, becoming a wick, will never be changed.
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公开(公告)号：JPH07103616A
公开(公告)日：1995-04-18
申请号：JP25419193
申请日：1993-10-12
Applicant: MATSUSHITA REFRIGERATION
Inventor： MANGYO MASAO , ITO SHINYA , NAKAOKA MASASHI
Abstract: PURPOSE:To provide a structure wherein no drop of cooling power occurs due to the clogging of capillary tubes, which is caused by contamination, in a freezer and a refrigerant compressor, in which a lube oil mainly composed of an ester is sealed. CONSTITUTION:A filter 29 comprising a membrane made of such materials 88 fluororesin, a cellulose-mixed ester, etc., is held between a wire netting 30 and a punching metal 31 in the form of sandwich. The outer periphery of the same is covered with a seal collar main body 53 and a seal collar cover 54 from right and left and, in this state, the outer periphery of a dryer is fanged 35 to be fixed airtightly to the seal collar cover, thus enabling all the refrigerant gas in a freezer to pass through the filter 29 and filters in a refrigerant passage of a refrigerant compressor.
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