CN103122842A - Refrigerant compressor - Google Patents

Refrigerant compressor Download PDF

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Publication number
CN103122842A
CN103122842A CN2012104647933A CN201210464793A CN103122842A CN 103122842 A CN103122842 A CN 103122842A CN 2012104647933 A CN2012104647933 A CN 2012104647933A CN 201210464793 A CN201210464793 A CN 201210464793A CN 103122842 A CN103122842 A CN 103122842A
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CN
China
Prior art keywords
nitrile butadiene
butadiene rubber
refrigerant
condition
rubber
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Pending
Application number
CN2012104647933A
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Chinese (zh)
Inventor
川端淳太
林康司
坂内里江
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of CN103122842A publication Critical patent/CN103122842A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/001—Pumps for particular liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • F04B39/0061—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes using muffler volumes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • F04B39/0223—Lubrication characterised by the compressor type
    • F04B39/023—Hermetic compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/02—Rubber

Abstract

The invention provides a refrigerant compressor. The refrigerant compressor according to the present invention is configured that at least one member constituting an electric element and a compression element is made of a rubber material. This rubber material is nitrile rubber, in which: Condition 1: bound acrylonitrile content is within a range of 35 to 51% by weight; Condition 2: organic compound having carbon atom, which is capable of creating double bond with sulfur atom, nitrogen atom or carbon atom and is also capable of creating single bond with sulfur atom or nitrogen atom, is not used as a vulcanizing accelerator in the process for creating cross-linkage; and Condition 3: no phthalic ester is contained.

Description

Coolant compressor
Technical field
The present invention relates to the coolant compressor that refrigerator, air regulator etc. use.
Background technique
In recent years, the high efficiency of the coolant compressor of closed type is developed.This is mainly the viewpoint from the environment of preserving our planet, in order to reduce the use of fossil fuel.As one of method of high efficiency, known have the temperature of the refrigerant when sucking by reduction to realize the technology that refrigerating capacity improves.In this technology, usually, be located at the parts of parts (being called for convenience of description, " inner member ") the use elasticity system in coolant compressor.
For example, at patent documentation 1: TOHKEMY 2008-223605 communique or patent documentation 2: in TOHKEMY 2008-215194 communique, disclose and importing the suction pipe of refrigerant and be located at the technology that the guiding element of rubber system is set between suction silencer (or baffler) in seal container in seal container.The guiding element of this rubber system is equivalent to above-mentioned inner member, and for example, technology as disclosed in patent documentation 1 is preferably used nitrile butadiene rubber.
Wherein, the inner member of nitrile butadiene rubber system usually, contains phthalic acid ester as the plasticizing agent of nitrile butadiene rubber etc.About phthalic acid ester, in recent years, pointed out to affect human body and physical environment.
Therefore, use if make the inner member that the nitrile butadiene rubber that does not contain phthalic acid ester is arranged, will reduce the quality of inner member.
For example, as the refrigerant that uses in coolant compressor, can enumerate the so-called freon substitutes such as the hydro carbons refrigerant such as R600a or HFC compound (HFC).In addition, also use lubricated wet goods oils material in seal container.When these refrigerant or oils material or their mixture contact with the nitrile butadiene rubber that does not contain phthalic acid ester, sometimes can produce attachment on the surface of nitrile butadiene rubber, or produce bubble.These surface abnormalities can cause the reduction of the quality of inner member.
Summary of the invention
The present invention completes in order to address this is that, its purpose is, possess in the coolant compressor of closed type of the parts (inner member) that use do not contain the nitrile butadiene rubber of phthalic acid ester in inside, suppress the reduction of the quality of these parts, realize good reliability.
constituting of coolant compressor of the present invention: storing viscosity in seal container is the lubricant oil of VG3～VG22, and hold electric element and driven and the compressing member of compression refrigerant by this electric element, consist of the parts of above-mentioned electric element and consist of that in the parts (inner member) of above-mentioned compressing member, at least a parts comprise rubber material, as this rubber material, use following nitrile butadiene rubber, wherein, bound acrylonitrile content is in the scope of 35～51 % by weight, when crosslinked, do not use and comprise and sulphur atom, nitrogen-atoms or carbon atom form two keys and form the organic compound of carbon atom of singly-bound as vulcanizing accelerator with sulphur atom or nitrogen-atoms, and this nitrile butadiene rubber does not comprise phthalic acid ester.
According to above-mentioned formation, nitrile butadiene rubber does not use above-mentioned vulcanizing accelerator (condition 1), does not comprise phthalic acid ester (condition 2), and bound acrylonitrile content is (condition 3) in above-mentioned scope, therefore, even inner member contacts with for example HFC class refrigerant, also can suppress quality and reduce.Consequently, can make the reliability of closed type coolant compressor better.
In above-mentioned coolant compressor, above-mentioned nitrile butadiene rubber can be also sulfureted rubber by peroxide cure.
According to above-mentioned formation, nitrile butadiene rubber also satisfies the such condition of peroxide cure (condition 4), therefore, even inner member contacts with for example hydro carbons refrigerant, also can suppress quality and reduce.Consequently, can make the reliability of closed type coolant compressor better.
Above-mentioned purpose of the present invention, other purpose, feature and advantage under the reference accompanying drawing, can be known from following detailed description preferred embodiment.
Description of drawings
Fig. 1 means the transverse sectional view of a representative example of the formation of coolant compressor of the present invention;
Fig. 2 means in coolant compressor shown in Figure 1, the longitudinal sectional view of the section of observing from the axis direction of suction pipe;
Fig. 3 means the plotted curve of the relation of the bound acrylonitrile content of nitrile butadiene rubber and glass transition temperature;
Fig. 4 means the result of comparative example 1 of the present invention, namely, for the sample of the inner member that uses the nitrile butadiene rubber that does not contain phthalic acid ester, with the IR spectrogram of Fourier transform infrared spectrophotometer (FT-IR) analysis in the result of the attachment of its Surface Creation;
Fig. 5 means the result of comparative example 2 of the present invention, that is, for the sample of the inner member that uses the nitrile butadiene rubber that does not contain phthalic acid ester, utilize the FT-IR analysis at the IR spectrogram of the result of the attachment of its Surface Creation.
Embodiment
constituting of coolant compressor of the present invention: storing viscosity in seal container is the lubricant oil of VG3～VG22, and hold electric element and driven and the compressing member of compression refrigerant by this electric element, at least a parts (inner member) that consist of the parts of above-mentioned electric element and consist of in the parts of above-mentioned compressing member comprise rubber material, as this rubber material, use following nitrile butadiene rubber, wherein, bound acrylonitrile content is in the scope of 35～51 % by weight, when crosslinked, do not use and comprise and sulphur atom, nitrogen-atoms or carbon atom form two keys and form the organic compound of carbon atom of singly-bound as vulcanizing accelerator with sulphur atom or nitrogen-atoms, and this nitrile butadiene rubber does not contain phthalic acid ester.
According to above-mentioned formation, because nitrile butadiene rubber satisfies following condition, condition 1: do not use above-mentioned vulcanizing accelerator, condition 2: do not contain phthalic acid ester, in addition, condition 3: bound acrylonitrile content is in above-mentioned scope, so even inner member contacts with for example HFC class refrigerant, also can suppress quality and reduce.Consequently can make the reliability of coolant compressor of closed type better.
In the coolant compressor of above-mentioned formation, can be also the Mooney viscosity ML of above-mentioned nitrile butadiene rubber in the time of 100 ℃ 1+4In 50～150 scope, hardness is in the scope of 55 °～80 °.
According to above-mentioned formation, nitrile butadiene rubber satisfies the scope of above-mentioned Mooney viscosity and the such condition of appending of scope of above-mentioned hardness, therefore, easily makes and installs according to the kind of inner member.Thereby can make the reliability of coolant compressor better.
In addition, in the coolant compressor of above-mentioned formation, can be also that the above-mentioned bound acrylonitrile content of above-mentioned nitrile butadiene rubber is in the scope of 40～51 % by weight.
According to above-mentioned formation, as long as bound acrylonitrile content in above-mentioned scope, just can be realized the better physical property of nitrile butadiene rubber.Therefore, can make the reliability of coolant compressor better.
In addition, in the coolant compressor of above-mentioned formation, can be also that above-mentioned refrigerant is HFC compound (HFC) class refrigerant or the mixed cooling medium that contains this HFC class refrigerant, above-mentioned lubricant oil be to be selected from least a in ester oil, alkylbenzene oil, polyvinylether, PAG.
According to above-mentioned formation, in the situation that nitrile butadiene rubber satisfies above-mentioned condition 1～3, especially can make the reliability of coolant compressor better.
In addition, in the coolant compressor of above-mentioned formation, above-mentioned nitrile butadiene rubber can be also sulfureted rubber by peroxide cure.
According to above-mentioned formation, nitrile butadiene rubber not only satisfies above-mentioned condition 1～3, and satisfies condition 4: peroxide cure, therefore, even inner member contacts with for example hydro carbons refrigerant, also can suppress the reduction of quality.Consequently can make the reliability of coolant compressor of closed type better.
In addition, in the coolant compressor of above-mentioned formation, above-mentioned refrigerant is at least a hydro carbons refrigerant in R600a and R290, the mixed cooling medium that perhaps contains this hydro carbons refrigerant, above-mentioned lubricant oil can be also to be selected from least a in mineral oil, ester oil, alkylbenzene oil, polyvinylether, PAG.
According to above-mentioned formation, in the situation that nitrile butadiene rubber satisfies above-mentioned 1～4 condition, especially can make the reliability of coolant compressor better.
Below, with reference to accompanying drawing, the preferred embodiment of the present invention is described.In addition, in the following description, to the identical reference marks of element mark identical or suitable in all figure, omit the explanation of its repetition.
(mode of execution 1)
(configuration example of coolant compressor)
As shown in the longitudinal sectional view of the transverse sectional view of Fig. 1 and Fig. 2, the coolant compressor 100 of present embodiment possesses seal container 10, electric element 20 and compressing member 30.
Seal container 10 is to carry out airtight housing with the state that inside accommodates electric element 20 and compressing member 30, and lubricant oil 11 can be stored in its bottom.In the present embodiment, this lubricant oil 11 is pressed the classification of ISO viscosity, has the viscosity in VG3～VG22 scope, preferably has the viscosity in VG5～VG22 scope.In addition, the interior external application suction pipe 40 of seal container 10 is communicated with.
There is no particular limitation for the concrete kind of lubricant oil 11, but in the present invention, the preferred at least a light wood material that is selected from ester oil, alkylbenzene oil, polyvinylether, PAG that uses.These light wood material both can be used alone as lubricant oil 11, also can be with the two or more mixtures that suitably combine as lubricant oil 11.
Usually, the lubricant oil 11 of using in coolant compressor 100 is that the light wood material that viscosity is different mixes to come adjusting viscosity.Therefore, in the present invention, as lubricant oil 11, two or more above-mentioned light wood material is mixed, be adjusted to enter VG3～VG22 scope in get final product.In addition, also can only viscosity be entered a kind of light wood material in the scope of VG3～VG22 as lubricant oil 11.
Electric element 20 is made of stator 21 and rotor 22 at least, makes compressing member 30 be rotated driving.Compressing member 30 is the one assembling together with electric element 20, possesses cylinder block 31, piston 32 and suction silencer 33.Cylinder block 31 arranges in the mode that forms pressing chamber 311 cylindraceous.Piston 32 arranges in the mode that the inner space at cylinder block 31 moves back and forth.Suction silencer 33 has the silence space 331 that is communicated with pressing chamber 311.
Suction silencer 33 also has can import from suction pipe 40 suction port 332 of refrigerant.This suction port 332 is located at the position that do not overlap with suction pipe 40 (position of departing from the projection position of suction pipe 40) the projection drawing of observing from the axis direction of suction pipe 40.In addition, be provided with the guiding element 333 of nitrile butadiene rubber system at suction port 332.
Guiding element 333 is fixed in suction silencer 33 with the state that stretches out from suction port 332.In addition, the joint of suction pipe 40 and seal container 10 becomes the opening of suction pipe 40 is interior and seal container 10 interior connections, but guiding element 333 is disposed at and the opposed position of the opening of this suction pipe 40.
Therefore, the refrigerant that is inhaled into from suction pipe 40 can import in suction port 332 via this guiding element 333.Suction port 332 is refrigerant in suction silencer 33 " importing openings ", and therefore, the refrigerant that is imported in suction silencer 33 is imported into pressing chamber 311 from the silence space 331 of suction silencer 33 again.
In addition, coolant compressor 100 illustrated in figures 1 and 2 is general structure, except above-mentioned seal container 10, electric element 20, compressing member 30 and suction pipe 40, also possesses known various mechanism or parts etc.In addition, the concrete structure of seal container 10, electric element 20, compressing member 30 and suction pipe 40 is not particularly limited, and preferably uses known parts.
In addition, spendable refrigerant also is not particularly limited in the present invention, can enumerate the hydro carbons refrigerant such as R600a, R290, the HFC class refrigerant such as R134a, other known refrigerant that can mix with these refrigerant etc.These refrigerant both can only use a kind of, also can be used as the multiple mixture that forms of appropriate combination and used.In addition, R600a, R290, R134a etc. are the refrigerant numberings by the ISO817 definition.
For the coolant compressor 100 of the closed type of above-mentioned formation, illustrate an example of its action.
At first, by will be connected with electric element 20 at not shown external power supply in Fig. 1 and Fig. 2, during to electric element 20 supply capability, rotor 22 rotations of this electric element 20.Along with the rotation of rotor 22, the piston 32 of compressing member 30 carries out the to-and-fro motion for compression in the inner space of cylinder block 31.
In the operation that sucks refrigerant, carry out action as above by compressing member 30, the pressure decreased in pressing chamber 311.Thus, the internal pressure of seal container 10 also reduces.Although not shown in Fig. 1 and Fig. 2, the external refrigerating system system is connected with suction pipe 40, therefore from the refrigerant of this external refrigerating system system by suction pipe 40, temporarily be imported into seal container 10, discharge to the place ahead of guiding element 333.
In seal container 10, lubricant oil 11 disperses.Therefore, a large amount of refrigerant impacts together with the lubricant oil 11 that disperses and the opposed guiding element 333 of suction pipe 40.Perhaps, liquid refrigerant directly impacts guiding element 333.Wherein, guiding element 333 is connected with the suction port 332 of suction silencer 33, and the refrigerant (with lubricant oil 11) that therefore impacts after guiding element 333 is imported into the low suction port of pressure 332, is inhaled in suction silencer 33.
The refrigerant that is inhaled into suction silencer 33 is inhaled in the pressing chamber 311 of compressing member 30 by the silence space 331 of suction silencer 33.Be inhaled into the refrigerant (with lubricant oil 11) of pressing chamber 311 by the to-and-fro motion of piston 32, interior compressed at this pressing chamber 311.Compressed refrigerant is discharged to outside refrigeration system again.
In said structure, guiding element 333 and suction pipe 40 are opposed with the state that approaches.Therefore, keep the state of lower temperature to be inhaled in suction silencer 33 from the refrigerant of external refrigerating system system introducing, interior compressed at pressing chamber 311.Thus, the suction quality (refrigerant circulation quantity) in the unit time of refrigerant increases.Consequently, coolant compressor 100 can be realized good efficient, can improve the refrigerating capacity of external refrigerating system system.
(inner member of nitrile butadiene rubber system)
In the present embodiment, above-mentioned guiding element 333 is equivalent to be arranged at the inner member of nitrile butadiene rubber system of the inside of coolant compressor 100.
The rubber material that is used for guiding element 333 is known nitrile butadiene rubber, be nitrile butadiene rubber (NBR, acrylonitrile and 1, the copolymer of 3-butadiene) get final product, in the present invention, " nitrile butadiene rubber " also comprises the hydrogenated nitrile-butadiene rubber that unsaturated bond hydrogenation is obtained, the modified butadiene acrylonitrile rubbers such as carboxy-modified nitrile butadiene rubber, organic-silicon-modified nitrile butadiene rubber, maleic acid modified butadiene acrylonitrile rubber, hydroxyl modification nitrile butadiene rubber or the rubber that their hydrogenation is obtained are substituted by the part of butadiene acrylonitrile-butadiene-isoprene copolymer that isoprene obtains etc.
In addition, in the present invention, the rubber material that uses as guiding element 333 inner members such as grade, to use to have the material of nitrile butadiene rubber to get final product, therefore, can comprise above-mentioned nitrile butadiene rubber rubber material in addition, also can comprise the various additives except phthalic acid ester.Therefore, the rubber material that uses of inner member is to comprise nitrile butadiene rubber to get final product as the acrylonitrile rubber composite of main component.Therefore, in this specification, so-called " inner member of nitrile butadiene rubber system " or " guiding element 333 of nitrile butadiene rubber system " refers to " inner member or the guiding element 333 that use acrylonitrile rubber composite to make ".
As the rubber material beyond nitrile butadiene rubber, can enumerate the known rubber such as natural rubber, ethylene propylene rubber, isoprene rubber, butadiene rubber, styrene butadiene rubbers, chloroprene rubber, butyl rubber, acrylic rubber, be not particularly limited.
In addition, can enumerate the inorganic fillers such as carbon, talcum, clay, graphite as additive, the processing aids such as palustric acid, stearic acid, oleic acid, linoleic acid, linolenic acid, paraffin, zine oxide, magnesium oxide, hydrotalcite etc. are subjected to sour agent, the antiagers such as quinolines, amine, phenols, plasticizing agent except phthalic acid ester etc. are not particularly limited.
In addition, use vulcanzing agent in order to make nitrile butadiene rubber, but also can use known vulcanzing agent as this vulcanzing agent.For example can enumerate, use the sulfur cross-linking of sulphur or sulphur compounds as vulcanzing agent, or use the peroxide cure of organic peroxide etc. as vulcanzing agent, or sulfur cross-linking and peroxide cure and use.
The concrete kind of the organic peroxide that peroxide cure uses is not particularly limited; can enumerate; for example, alkyls superoxide, acyl group class superoxide, peroxidating ketone superoxide, diacyl peroxide class superoxide, hydroperoxide kind superoxide, dialkyl class superoxide, ketal peroxide class superoxide, alkyl super-acid ester class superoxide, peroxocarbonate class superoxide etc.These superoxide both can only use a kind of, and were also can appropriate combination two or more and use.
In addition, when making nitrile butadiene rubber, also can and use vulcanizing accelerator together with vulcanzing agent.As these vulcanizing accelerators, can suitably use known vulcanizing accelerator, in the present invention, about organic compounds such as thiurams, do not use as vulcanizing accelerator.To narrate in the back about this point.
In addition, also contain the composition (that is, also can be used as the composition that vulcanizing accelerator uses) that shows the sulfuration promoting effect (for example, zine oxide etc. be subjected to the fatty acid such as sour agent, stearic acid, oleic acid (processing aid) etc.) in above-mentioned additive.Therefore, when these additives also play a role as vulcanizing accelerator, also can add no longer in addition vulcanizing accelerator.
In addition, the vulcanzing agent that also can be used as the inorganic compound class as the zine oxide that is subjected to sour agent of nitrile butadiene rubber etc. uses, but in the present invention, vulcanzing agent is defined in above-mentioned sulfur cross-linking or peroxide cure, does not use the sulfuration of the vulcanzing agents beyond these.
In addition, in the present embodiment as the inner member of nitrile butadiene rubber system, illustration guiding element 333, but the present invention is not limited to this.Inner member of the present invention is the parts that consist of the parts of electric element 20 and consist of compressing member 30, so long as (i) be positioned at the seal container 10 of coolant compressor 100, (ii) refrigerant or the lubricant oil 11 that dissolves in refrigerant easily contact, (iii) the parts of rubber system maybe can use the parts that rubber material is made, and can be any parts.As the inner member except guiding element 333, can enumerate for example suction port 332 of suction silencer 33.That is, as long as this suction port 332 is set as the opening features of nitrile butadiene rubber system, just be equivalent to inner member of the present invention.
(satisfying the condition of nitrile butadiene rubber)
Wherein, in the present invention, the nitrile butadiene rubber that inner member (guiding element 333) uses is to make under the following conditions the nitrile butadiene rubber that obtains, namely, condition 1: do not use to comprise the organic compound of carbon atom that forms two keys and form singly-bound with sulphur atom or nitrogen-atoms with sulphur atom, nitrogen-atoms or carbon atom as vulcanizing accelerator, and condition 2: do not contain phthalic acid ester.In addition, in the present invention, condition 3: the bound acrylonitrile content of nitrile butadiene rubber is in the scope of 35～51 % by weight.
Wherein, so-called " comprise with sulphur atom, nitrogen-atoms or carbon atom and form two keys and form the organic compound of the carbon atom of singly-bound with sulphur atom or nitrogen-atoms ", in the present invention, refer to comprise in structure of molecule-C(=S)-N ,-C(=N)-N ,-C(=C)-N ,-C(=N)-S ,-the isostructural compound of C(=S)-S.Specifically, can enumerate such as: thiuram (comprise-C(=S)-N structure and-C(=S)-S structure), thiazole (comprise-C(=C)-N structure and-C(=N)-S structure), thiocarbamide (comprising-C(=S)-N structure), aminodithioformic acid (comprise-C(=S)-N structure and-C(=S)-S structure) and guanidine (comprising-C(=N)-N structure) etc.
In addition, " aminodithioformic acid " in the present invention comprises the compound of the basic structure (N-C(=S)-S) with aminodithioformic acid.Specifically, various dithiocarbamate salt are contained in " aminodithioformic acid " of the present invention.In addition, " aminodithioformic acid " of the present invention is not limited to the nitrogen-atoms (N) upper " aminodithioformic acid of narrow sense (salt) " in conjunction with two hydrogen atoms in basic structure, also is included on nitrogen-atoms the aminodithioformic acid in conjunction with organic groups such as alkyl.
According to inventors' of the present invention research, satisfy the nitrile butadiene rubber of above-mentioned condition 1～3 by use, even do not contain phthalic acid ester, the oil resistance of nitrile butadiene rubber and resistance to chemical reagents are also good.Therefore, even refrigerant contacts with the inner member of nitrile butadiene rubber system, also can effectively avoid its quality to reduce.Therefore, can keep the reliability of coolant compressor 100, and realize high efficiency.
Study for each condition.At first, with regard to condition 1, state in the use in the situation of vulcanizing accelerator, as described later shown in embodiment, confirmed on the surface of the inner member of nitrile butadiene rubber system and produced attachment.Judge that this attachment is that a part of vulcanizing accelerator oozes out formation on the surface.Therefore, do not satisfy condition 1 o'clock, produce oozing out of vulcanizing accelerator on the inner member of nitrile butadiene rubber system, cause the quality of this inner member to reduce.
In addition, with regard to condition 2, do not contain phthalic acid ester, the various misgivings that just can avoid phthalic acid ester to cause.In addition, in the present invention, the so-called phthalic acid ester that nitrile butadiene rubber is contained refers to not only be defined in the ester of phthalic acid and alcohol specific compound, but define as the compound of broad sense.Representational example as phthalic acid ester can be enumerated: dimethyl phthalate, diethyl phthalate, dibutyl phthalate, dioctyl phthalate, di-n-octyl phthalate, diisononyl phthalate, dinonyl phthalate, diisooctyl phthalate, BBP(Butyl Benzyl Phthalate etc., but be not limited to these.
In addition, with regard to condition 3, as long as the bound acrylonitrile content of nitrile butadiene rubber just can bring into play the good physical property as rubber, and in rubber molecule, the itrile group that is derived from acrylonitrile (increases CN) in the scope of 35～51 % by weight.Thus, itself polarity of nitrile butadiene rubber uprises, and therefore the compatibility of the refrigerant low with respect to the polarity lubricant oil 11 etc. of refrigerant (or sneaked into) reduces.Consequently, can suppress refrigerant etc. excessively soaks into to the inner member of nitrile butadiene rubber system.
On the other hand, during bound acrylonitrile content less than 35 % by weight of nitrile butadiene rubber, refrigerant etc. easily exceedingly soak into to inner member, can not effectively suppress the generation of surface abnormalities.On the other hand, if when the content of bound acrylonitrile surpassed 51 % by weight, as shown in Figure 3, the glass transition temperature of nitrile butadiene rubber became more than-10 ℃, therefore, fragility increases if temperature on every side reduces, just can not keep the characteristic as rubber.Therefore, the content of bound acrylonitrile gets final product in the scope of 35～51 % by weight, preferably gets final product in the scope of 40～51 % by weight as shown in the Examples.
Below, the environment of the guiding element 333 in the seal container 10 is as example, and the situation that the quality of the inhibition inner member that the nitrile butadiene rubber that satisfies above-mentioned condition 1～3 is produced reduces specifically describes.
As mentioned above, phthalic acid ester is used as the plasticizing agent of nitrile butadiene rubber etc., is restricted but use in recent years.Wherein, the phthalic acid ester that is added in nitrile butadiene rubber not only plays a role as plasticizing agent, but also has the effect of soaking into that prevents refrigerant.That is, when phthalic acid ester is added in nitrile butadiene rubber, to enter as the state in the gap of the rubber molecule of the high molecular nitrile butadiene rubber of chain and to be held.Therefore, even inner member and refrigerant or the lubricant oil 11 that is dissolved with refrigerant contact, the phthalic acid ester between rubber molecule also can hinder soaking into of refrigerant.
In contrast, in the situation that do not add phthalic acid ester in nitrile butadiene rubber, there is not the molecule in the gap of filling up rubber molecule.Therefore, if inner member comprises refrigerant with refrigerant or lubricant oil 11() when contacting, refrigerant just is easy to soak into between rubber molecule.Consequently, might produce attachment on the surface of the inner member of nitrile butadiene rubber system, or produce the fault in material such as bubble.These surface abnormalities can make the quality of inner member reduce.
Particularly guiding element 333 with the opposed position of suction pipe 40, arrange near this suction pipe 40.Therefore, when importing refrigerant from suction pipe 40, this refrigerant directly impacts.Therefore, the high frequency of guiding element 333 ground exposes to the open air in the refrigerant of high concentration.In addition, as long as refrigerant keeps liquid condition to impact guiding element 333, refrigerant will evaporate because of impact.Therefore, guiding element 333 also can descend because of the evaporation temperature of refrigerant sometimes.
In contrast, in the present invention, inner member (for example, guiding element 333) is made with the nitrile butadiene rubber that satisfies above-mentioned condition 1～3.Therefore, as described later shown in embodiment, even refrigerant contacts with inner member, also can avoid producing surface abnormalities at this inner member, and, according to condition 3, even the temperature of the inner member of nitrile butadiene rubber system reduces, also can bring into play sufficient physical property as rubber material.Consequently, can make the reliability of coolant compressor better.Particularly, in the present embodiment, shown in embodiment, in the situation that refrigerant is the HFC class refrigerant such as R134a, can more effectively suppress the generation of surface abnormalities as described later.
In addition, in the present invention, preferred nitrile butadiene rubber on the basis of above-mentioned condition 1～3, the Mooney viscosity ML when appending condition 1:100 ℃ 1+4In 50～150 scope, and append condition 2: hardness is in the scope of 55 °～80 °.In addition, the Mooney viscosity of nitrile butadiene rubber is measured according to JISK6300-1, and the hardness of nitrile butadiene rubber is measured according to JISK6253-3.
If nitrile butadiene rubber satisfies the condition 1,2 of appending, the mechanical property such as this nitrile butadiene rubber tensile strength will improve.Therefore, as long as inner member is guiding element 333, just easily makes and install.Therefore, as long as nitrile butadiene rubber satisfies condition 1～3 and append condition 1,2, not only can suppress the generation of surface abnormalities, and can make the good parts of quality of inner member.Consequently, can make the reliability of coolant compressor 100 better.
(mode of execution 2)
In above-mentioned mode of execution 1, the nitrile butadiene rubber that the inner member of coolant compressor 100 uses satisfy at least above-mentioned condition 1～3, and in present embodiment 2, nitrile butadiene rubber not only satisfies condition 1～3, and satisfies condition 4.
In addition, the coolant compressor 100 that uses in the present embodiment and identical (the seeing figures.1.and.2) that illustrate in above-mentioned mode of execution 1.In addition, the formation of the nitrile butadiene rubber that uses of inner member also with above-mentioned mode of execution 1 in explanation identical.
In the present embodiment, be R600a and/or R290 at refrigerant, or in the situation that comprise these refrigerant, on the basis of above-mentioned condition 1～3, append condition 4: nitrile butadiene rubber can suppress soaking into of refrigerant well for when the sulfureted nitrile butadiene rubber of peroxide cure.
In above-mentioned mode of execution 1, the sulfuration of nitrile butadiene rubber can be namely sulfur cross-linking, can be also peroxide cure.In contrast, in the present embodiment, according to condition 4, sulfuration is defined as peroxide cure.Thus, shown in embodiment, even hydro carbons refrigerant soaks in nitrile butadiene rubber, also can suppress well the generation of surface abnormalities as described later.
Specifically, when 1～3 the nitrile butadiene rubber of satisfying condition contacts with hydro carbons refrigerant such as R600a or R290, shown in embodiment, although can suppress the generation of attachment and bubble, might produce rough surface as described later.In the present embodiment, satisfy condition 4 peroxide cure of nitrile butadiene rubber can prevent in fact the generation of this surface abnormalities of rough surface thus.Therefore, can effectively avoid the quality of the inner member (guiding element 333 etc.) of nitrile butadiene rubber system to reduce, thereby the high coolant compressor of reliability 100 can be provided.
In addition, in the present embodiment, also preferred nitrile butadiene rubber on the basis of above-mentioned condition 1～4, also satisfies above-mentioned Mooney viscosity ML when appending condition 1:100 ℃ 1+4In 50～150 scope, and the above-mentioned condition 2 of appending: hardness is in the scope of 55 °～80 °.As long as nitrile butadiene rubber satisfy condition 1～4 and append condition 1,2 whole, just can further effectively suppress soaking into of refrigerant, and therefore the member that the quality that can make inner member is good, can make the reliability of coolant compressor 100 better.
In addition, in the above-described embodiment, can be suitable as the light wood material of lubricant oil 11, enumerate ester oil, alkylbenzene oil, polyvinylether, PAG, but in the present embodiment, except these light wood material, also can suitably use mineral oil.
In addition, as depicted in figs. 1 and 2, illustrative coolant compressor 100 is reciprocating motion type in above-mentioned mode of execution 1 and present embodiment 2, but self-evident, the present invention is not limited to this.In the present invention, spendable coolant compressor 100 can certainly be the structure with slide part, expulsion valve etc., for example, can be rotary, eddy type, oscillatory type etc.
Embodiment
Based on embodiment, comparative example and conventional example, the present invention is more specifically described, but the present invention is not limited to this.Those skilled in the art do not depart from the scope of the present invention, and can carry out various changes, correction and change.
(conventional example 1)
Use existing nitrile butadiene rubber, prepare sample, this existing nitrile butadiene rubber contains phthalic acid ester, utilizes sulfur cross-linking to vulcanize, and uses thiuram as vulcanizing accelerator.The bound acrylonitrile content of this nitrile butadiene rubber is 32 % by weight.This sample is enclosed in seal container together with R134a and polyol ester, carried out ageing under the condition of 125 ℃, 2 hours.Then, the surface by the visual observations sample.To the results are shown in table 1.
(comparative example 1)
Usage comparison nitrile butadiene rubber (bound acrylonitrile content is 32 % by weight) is made the sample same with conventional example 1, and this comparison nitrile butadiene rubber does not contain phthalic acid ester, vulcanizes by sulfur cross-linking, uses thiuram as vulcanizing accelerator.This sample is carried out ageing under the condition identical with conventional example 1.Then, the surface by the visual observations sample.To the results are shown in table 1.
(embodiment 1)
As nitrile butadiene rubber, use is vulcanized, is not contained phthalic acid ester (condition 2), do not contain thiuram (condition 1), is set as the nitrile butadiene rubber of 40 % by weight (condition 3) in connection with acrylonitrile content as vulcanizing accelerator by sulfur cross-linking, makes the sample identical with conventional example 1.This sample is carried out ageing under the condition identical with conventional example 1.Then, the surface by the visual observations sample.To the results are shown in table 1.
(embodiment 2)
Except sulfuration is not sulfur cross-linking and being set as peroxide cure, uses the nitrile butadiene rubber identical with embodiment 1, the sample that making and conventional example 1 are same carries out ageing under the condition identical with conventional example 1.Then, the surface by the visual observations sample.To the results are shown in table 1.
［ table 1 ］
Figure BDA00002416030800131
The result of observation and comparison example 1 is used only not contain the nitrile butadiene rubber of phthalic acid ester, still can see attachment on the surface of sample.Utilize Fourier transform infrared spectrophotometer (FT-IR) to analyze this attachment, as shown in the IR spectrogram of Fig. 4, vulcanizing accelerator has been observed the peak of the two keys (C=S) of distinctive sulphur-carbon.Therefore, be only not contain phthalic acid ester (only condition 2), the part that still can produce vulcanizing accelerator (thiuram) is oozed out such problem on the surface.
In contrast, observe the result of embodiment 1 and 2, do not contain phthalic acid ester (condition 2) when using, and do not use vulcanizing accelerator (thiuram) (condition 1), bound acrylonitrile content is in the scope of 35～51 % by weight during the nitrile butadiene rubber of (condition 3), even sulfuration does not find to produce attachment for sulfur cross-linking, peroxide cure yet on sample.
Therefore, in the result based on conventional example 1, comparative example 1, embodiment 1 and 2,1～3 the nitrile butadiene rubber of satisfying condition when contacting, is investigated as following with HFC class refrigerant (R134a).
In the sample (comparative example 1) that uses the nitrile butadiene rubber that does not contain phthalic acid ester, there is not the composition that soaks into that hinders refrigerant in the gap of rubber molecule.Especially dissolve in the polyol ester that R134a is arranged, its viscosity reduces because of dissolving in of R134a, easily enters the gap of rubber molecule.Therefore, can think and R134a or the polyol ester in the gap that enters rubber molecule a part of vulcanizing accelerator that is present at first the gap of rubber molecule is expressed into the surface.Consequently, the specimen surface in nitrile butadiene rubber system produces attachment.
In contrast, in the sample (embodiment 1 and 2) of the nitrile butadiene rubber that has used vulcanizing accelerator, vulcanizing accelerator can not be expressed into the surface of nitrile butadiene rubber, does not have attachment to ooze out.
In addition, no matter the sulfuration of nitrile butadiene rubber is sulfur cross-linking (embodiment 1) or peroxide cure (embodiment 2), all do not see oozing out of attachment.In the situation that sulfur cross-linking, (S-S-) generation is crosslinked between rubber molecule because of the key between sulphur.On the other hand, in the situation that peroxide cure, (C-C-) generation is crosslinked between rubber molecule because of the key between carbon for rubber molecule.These two kinds crosslinked in-C-C-key ratio-S-S-key in conjunction with can be high.Therefore, if having-the crosslinked embodiment's 1 of S-S-key nitrile butadiene rubber in, can prevent the generation of surface attachments, have-certainly also effective in the crosslinked embodiment's 2 of C-C-key nitrile butadiene rubber.
(conventional example 2)
Use contains phthalic acid ester, utilizes sulfur cross-linking to vulcanize, use as vulcanizing accelerator the existing nitrile butadiene rubber of thiuram, prepares sample.The bound acrylonitrile content of this nitrile butadiene rubber is 32 % by weight.This sample is enclosed in seal container together with R600a, carried out ageing at 125 ℃, 2 hours under condition.Then, the surface by the visual observations sample.To the results are shown in table 2.
(comparative example 2)
Use does not contain phthalic acid ester, utilizes sulfur cross-linking to vulcanize, use as vulcanizing accelerator the comparison nitrile butadiene rubber (bound acrylonitrile content is 32 % by weight) of thiuram, makes the sample same with conventional example 1.This sample is carried out ageing under the condition identical with conventional example 2.Then, the surface by the visual observations sample.To the results are shown in table 2.
(comparative example 3)
Except the bound acrylonitrile content with nitrile butadiene rubber is set as 40 % by weight, with the same sample of making of comparative example 2.This sample is carried out ageing under the condition identical with conventional example 2.Then, the surface by the visual observations sample.To the results are shown in table 2.
(comparative example 4)
Except do not use vulcanizing accelerator when nitrile butadiene rubber vulcanizes, with the same sample of making of comparative example 3.This sample is carried out ageing under the condition identical with conventional example 2.Then, the surface by the visual observations sample.To the results are shown in table 2.
(embodiment 3)
As nitrile butadiene rubber, use not contain phthalic acid ester (condition 2), do not contain thiuram (condition 1), be set as 40 % by weight (condition 3), vulcanize the nitrile butadiene rubber of (condition 4) by peroxide cure in connection with acrylonitrile content as vulcanizing accelerator, make the sample same with conventional example 2.This sample is carried out ageing under the condition identical with conventional example 2.Then, the surface by the visual observations sample.To the results are shown in table 2.
(embodiment 4)
Except the bound acrylonitrile content with nitrile butadiene rubber is set as 51 % by weight, make similarly to Example 2 sample.This sample is carried out ageing in the condition identical with conventional example 2.Then, the surface by the visual observations sample.To the results are shown in table 2.
［ table 2 ］
Figure BDA00002416030800151
From the result of conventional example 2 and comparative example 2 as can be known, replace with R600a even will be exposed to the medium of the sample of nitrile butadiene rubber from R134a and polyol ester, if use only not contain the nitrile butadiene rubber of phthalic acid ester, also can see attachment on the surface of sample, and can see and produced bubble.
With the attachment of FT-IR analytical sample, as shown in the IR spectrogram of Fig. 5, vulcanizing accelerator is observed the peak of the two keys (C=S) of distinctive sulphur-carbon.Therefore, only do not contain phthalic acid ester (only condition 2), same with the result of comparative example 1, still can produce a part of vulcanizing accelerator (thiuram) and ooze out such problem on the surface.
Then, the result of observation and comparison example 3 although do not see bubble on the surface of sample, has been seen attachment.Therefore, only make the bound acrylonitrile content of nitrile butadiene rubber be increased to 40 % by weight (condition 2,3) from 32 % by weight, can not effectively avoid the generation of attachment.Then, the result of observation and comparison example 4 is not owing to using vulcanizing accelerator (thiuram) (condition 1～3), so although can avoid the generation of attachment, the surface abnormalities as new has confirmed rough surface.
At this, the result of comparative example 2～4 is compared, as can be known, by not containing phthalic acid ester (condition 2), do not use vulcanizing accelerator (condition 1), just can avoid oozing out of attachment, if increase the condition of the bound acrylonitrile content of nitrile butadiene rubber, just can prevent the generation of bubble.
When bound acrylonitrile content was increased, (quantity CN) increased to be derived from the itrile group of acrylonitrile in the rubber molecule of nitrile butadiene rubber.Because itrile group has polarity, so as nitrile butadiene rubber on the whole, polarity strengthens.Wherein, R600a is because being hydro carbons refrigerant, and polarity is low.Therefore, as long as relatively improve the polarity of nitrile butadiene rubber, just can effectively suppress R600a soaking in the nitrile rubber.Thus, can substantially prevent the generation of bubble.
In contrast, observe the result of embodiment 3 and 4, if when the sulfuration of nitrile butadiene rubber is not sulfur cross-linking but peroxide cure (condition 1～4), do not confirm any bubble, attachment and rough surface.
In the situation that the sulfuration of nitrile butadiene rubber is sulfur cross-linking, when not using the vulcanizing accelerators such as thiuram, the reductions such as the oil resistance of nitrile butadiene rubber.If oil resistance reduces, because being contacts with the hydro carbons refrigerant such as R600a, just be easy to produce rough surface.In contrast, in embodiment 3 and 4, the sulfuration of nitrile butadiene rubber is peroxide cure.As mentioned above, in sulfur cross-linking, crosslinked be between sulphur key (S-S-), in peroxide cure, crosslinked be between carbon key (C-C-).These two kinds crosslinked in-C-C-key ratio-S-S-key in conjunction with can be high.Therefore, can substantially prevent the rough surface of nitrile butadiene rubber in embodiment 3 and 4.
According to the above description, to those skilled in the art, a large amount of improvement of the present invention and other mode of execution are apparent.Therefore, above-mentioned explanation should only make an explanation as illustration, provides to indicate the purpose of carrying out optimum way of the present invention to those skilled in the art.Do not break away from spirit of the present invention, can substantially change the detailed content of its structure and/or function.
As mentioned above, according to the present invention, can provide reliability high coolant compressor, therefore can be widely applicable in the equipment that uses freeze cycle.

Claims (6)

1. coolant compressor is characterized in that:
Storing viscosity in seal container is the lubricant oil of VG3～VG22, and holds electric element and driven and the compressing member of compression refrigerant by this electric element,
Consist of the parts of described electric element and consist of that in the parts of described compressing member, at least a parts comprise rubber material,
As this rubber material, use following nitrile butadiene rubber, wherein,
Bound acrylonitrile content in the scope of 35～51 % by weight,
When crosslinked, do not use to comprise the organic compound of carbon atom that forms two keys and form singly-bound with sulphur atom or nitrogen-atoms with sulphur atom, nitrogen-atoms or carbon atom as vulcanizing accelerator, and described nitrile butadiene rubber does not comprise phthalic acid ester.
2. coolant compressor as claimed in claim 1 is characterized in that:
Mooney viscosity ML during 100 ℃ of described nitrile butadiene rubbers 1+4In 50～150 scope,
Hardness is in the scope of 55 °～80 °.
3. coolant compressor as claimed in claim 2 is characterized in that:
The described bound acrylonitrile content of described nitrile butadiene rubber is in the scope of 40～51 % by weight.
4. coolant compressor as described in any one in claim 1～3 is characterized in that:
Described refrigerant is HFC compound (HFC) class refrigerant, is perhaps the mixed cooling medium that contains this HFC class refrigerant,
Described lubricant oil is to be selected from least a in ester oil, alkylbenzene oil, polyvinylether, PAG.
5. coolant compressor as claimed in claim 1 or 2 is characterized in that:
Described nitrile butadiene rubber is sulfureted rubber by peroxide cure.
6. coolant compressor as claimed in claim 5 is characterized in that:
Described refrigerant is at least a hydro carbons refrigerant in R600a and R290, is perhaps the mixed cooling medium that contains this hydro carbons refrigerant,
Described lubricant oil is to be selected from least a in mineral oil, ester oil, alkylbenzene oil, polyvinylether, PAG.
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