CN105051465A - Compressor - Google Patents
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- CN105051465A CN105051465A CN201380074197.7A CN201380074197A CN105051465A CN 105051465 A CN105051465 A CN 105051465A CN 201380074197 A CN201380074197 A CN 201380074197A CN 105051465 A CN105051465 A CN 105051465A
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- Prior art keywords
- oil
- mentioned
- compressor
- cold
- producing medium
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Classifications
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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
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
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- 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
- F04B39/0215—Lubrication characterised by the use of a special lubricant
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- 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
- F04B39/0238—Hermetic compressors with oil distribution channels
- F04B39/0246—Hermetic compressors with oil distribution channels in the rotating shaft
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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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
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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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
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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
- F04C2210/00—Fluid
- F04C2210/14—Lubricant
- F04C2210/142—Ester
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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
- F04C2210/00—Fluid
- F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
- F04C2210/268—R32
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Compressor (AREA)
Abstract
A low-pressure container-type scroll compressor (1) comprises a hermetic container (10) having: a suction pipe (12) which sucks fluid; a compression mechanism section (30) which compresses fluid sucked from the suction pipe (12); and a discharge pipe (13) which discharges the fluid compressed by the compression mechanism section (30). Lubricating oil is provided, together with the fluid sucked from the suction pipe (12), within the hermetic container (10). The scroll compressor (1) is characterized in that the fluid is R32 refrigerant or mixed refrigerant which contains 51% or more of R32 refrigerant, and in that the lubricating oil is ester oil or ether oil.
Description
Technical field
The present invention relates to fluid compression and the compressor of discharging.
Background technology
If the such as screw compressor of compressor in the past is roughly distinguished according to for pressure limit during freezing air conditioner equipment, be then classified as 2 types.A kind of high-pressure bottle type (also having the situation being called high pressure dome-shaped) being the environment of refrigerator oil in compressor and being full of by Exhaust Gas, another kind is the low pressure vessel type (also having the situation being called low pressure dome-shaped) that the environment of refrigerator oil in compressor is full of by suction gas.In this two type, mutually different by the environment temperature of the refrigerator oil used as lubricating oil.Refrigerator oil significantly changes due to viscosity Yin Wendu, so, in all kinds of compressor, used by adjustment viscosity grade.Selecting under the refrigerator oil condition that there is intermiscibility with cold-producing medium as refrigerator oil, about oil concentration is frozen the pressure and temperature of the environment of machine oil, so, need regulation oil concentration (for example, see patent document 1) clearly.
In addition, be called as in the R32 cold-producing medium of low GWP (global warming coefficient) cold-producing medium, mix refrigerant containing more than 51% R32 cold-producing medium in use, when using together with refrigerator oil in the past, become low temperature if having, then cold-producing medium and oil are easily separated such feature.
At first technical literature
Patent document
Patent document 1: Japan Patent No. 3956589 publication
Summary of the invention
Invent problem to be solved
In screw compressor in the past, when using refrigerator oil (ester oil, the ether oil) be present in this life, R32 cold-producing medium, mix refrigerant containing more than 51% R32 cold-producing medium are compared with the R410A cold-producing medium containing 50%R32 cold-producing medium, under low temperature, do not fuse with refrigerator oil and be easily separated.In addition, the viscosity grade of refrigerator oil is higher, and the temperature that this separation starts is higher, in the ether oil of such as viscosity grade (ISOVG) 68, can be separated near 0 DEG C from cold-producing medium.In this case, be discharged to the low position of the reservoir of oil refrigerant loop of refrigerant loop, evaporimeter equitemperature from compressor and be separated with cold-producing medium and be detained, do not return compressor.Accordingly, the lubricating oil of compressor is not enough, can produce compression machine burning and glue.In addition, in the long mansion air conditioner of refrigerant loop, the refrigerating machine that uses at the temperature lower than air conditioner, be difficult to set up freeze cycle.
In addition, the ratio with R32 cold-producing medium is larger, the trend that the refrigerant temperature after compression is higher.Therefore, be present at refrigerator oil in the high-pressure bottle type in the space be full of by Exhaust Gas, select the refrigerator oil of more viscosity grade.
Below, an example of the refrigerator oil condition of such selection viscosity grade is enumerated.The environment temperature of the refrigerator oil of low pressure vessel type is 10 ~ 80 DEG C, and the environment temperature of the refrigerator oil of high-pressure bottle type is 50 ~ 120 DEG C.Now, such as, in order to oil viscosity (kinematic viscosity) is guaranteed at 10mm
2/ s, as the viscosity grade of refrigerator oil, in low pressure vessel type, needs selection 32 grade, in high-pressure bottle type, needs selection 68 grade.If owing to using the refrigerator oil of 32 grades in high-pressure bottle type, then viscosity reduces half, less than 10mm
2/ s, so, there is the possibility that can not meet the lubricity of sliding part.
That is; in the screw compressor of high-pressure bottle type in the past; if use the refrigerator oil of low viscosity grade, so that cold-producing medium and oil are fused under low temperature, then only guarantee that the oil viscosity of the lubricity of sliding part is not enough because the temperature of refrigerator oil environment is high.On the other hand, if use the refrigerator oil can guaranteeing the viscosity grade of the lubricity of sliding part, then cold-producing medium and oil do not fuse under low temperature, are easily separated.Accordingly, because from compressor, the oil be discharged in refrigerant loop is trapped in refrigerant loop, so, exist to produce because lubricating oil is not enough and compress machine burning and glue such problem points.
The present invention is the invention made to solve problem points as described above, and its objective is provides one that cold-producing medium and lubricating oil can be prevented to be separated under low temperature, and can guarantee the compressor of the lubricity of sliding part.
For solving the means of problem
Compressor of the present invention is the compressor of low pressure vessel type, possesses closed container, described closed container has the suction inlet sucking fluid, the compression mechanical part compressing the above-mentioned fluid sucked from above-mentioned suction inlet and discharges the outlet of the above-mentioned fluid that be have compressed by compression mechanism portion, the above-mentioned fluid and lubricating oil that have sucked from above-mentioned suction inlet is possessed in the lump in above-mentioned closed container, it is characterized in that, above-mentioned fluid is R32 cold-producing medium or the mix refrigerant containing more than 51% R32 cold-producing medium, and above-mentioned lubricating oil is Esters oil or ethers oil.
Invention effect
Compressor of the present invention is due to the low low pressure vessel type of the environment temperature that is lubricating oil, so, even if used together with R32 cold-producing medium or the mix refrigerant containing more than 51% R32 cold-producing medium by the low viscosity grade being difficult to be separated oil, also oil body can be guaranteed.Therefore, according to compressor of the present invention, cold-producing medium can be prevented to be separated under low temperature with lubricating oil, and the lubricity of sliding part can be guaranteed.
Accompanying drawing explanation
Fig. 1 is the curve map be described the refrigerator oil of the compressor being used in embodiments of the present invention 1, represents the temperature of 2 kinds of refrigerator oils in R32 refrigerant environment that viscosity grade is different and associate one example of viscosity.
Fig. 2 is the curve map be described the refrigerator oil of the compressor being used in embodiments of the present invention 1, represents an example of the intermiscibility of R32 cold-producing medium and various refrigerator oil.
The low-temperature region of the curve map of Fig. 2 is only amplified the curve map represented by Fig. 3.
Fig. 4 is the longitudinal section of the structure of the screw compressor 1 of an example of the compressor represented as embodiments of the present invention 1.
Detailed description of the invention
Below, the compressor of accompanying drawing to embodiments of the present invention is used to be described.Structure described below, action etc. are examples, and compressor of the present invention is not limited to such structure, action etc.In addition, in the various figures, identical Reference numeral is marked to same or similar parts or part.In addition, for detailed structure, aptly by illustrative simplicity or omission.In addition, for repetition or similar illustrating, aptly simplicity or omission.
Embodiment 1.
[formation of refrigerator oil]
First, the refrigerator oil (lubricating oil) of the compressor being used in embodiments of the present invention 1 is described.In R32 refrigerant environment, refrigerator oil viscosity Yin Wendu and significantly changing.Fig. 1 is the curve map be described the refrigerator oil of the compressor being used in present embodiment, represents that the temperature in R32 refrigerant environment of 2 kinds of refrigerator oils that viscosity grade (ISOVG) is different is routine with associate of viscosity (kinematic viscosity).The transverse axis of curve map represents the temperature (DEG C) of refrigerator oil, and the longitudinal axis represents refrigerator oil viscosity (mm
2/ s).As shown in Figure 1, the refrigerator oil of viscosity grade 32 and the refrigerator oil of viscosity grade 68 all exist and can guarantee such as viscosity 5mm
2the temperature range of/s (represented by dashed line in the graph of figure 1).But the temperature range that refrigerator oil is actually used is low pressure vessel type or high-pressure bottle type and different because of compressor.When the compressor for low pressure vessel type, the ambient temperature range (" low pressure vessel type uses region " in Fig. 1) of refrigerator oil is roughly 10 ~ 80 DEG C, when the compressor for high-pressure bottle type, the ambient temperature range (" high-pressure bottle type uses region " in Fig. 1) of refrigerator oil is roughly 50 ~ 120 DEG C.
When the refrigerator oil for viscosity grade 32, viscosity 5mm can be guaranteed throughout the bulk temperature scope of low pressure vessel type
2/ s, on the other hand, when the refrigerator oil for viscosity grade 68, only can guarantee viscosity 5mm in a part for the temperature range of low pressure vessel type
2/ s.Therefore, when the compressor of the low pressure vessel type for using R32 cold-producing medium, as refrigerator oil, select viscosity grade 32.Otherwise, when the refrigerator oil for viscosity grade 68, viscosity 5mm can be guaranteed throughout the roughly bulk temperature scope of high-pressure bottle type
2/ s, on the other hand, when the refrigerator oil for viscosity grade 32, only can guarantee viscosity 5mm in a part for the temperature range of high-pressure bottle type
2/ s.Therefore, when the compressor of the high-pressure bottle type for using R32 cold-producing medium, as refrigerator oil, select viscosity grade 68.If this is because use viscosity grade 32 in high-pressure bottle type, then oil viscosity reduces by half.
Fig. 2 is the curve map be described the refrigerator oil of the compressor being used in present embodiment, represents an example of R32 cold-producing medium and the intermiscibility (ratio of refrigerator oil and associating of two phase separation temperatures) of various refrigerator oil.The transverse axis of curve map represents ratio (oil content) (wt%) of the summation of the quality relative to cold-producing medium and refrigerator oil of the quality of refrigerator oil, and the longitudinal axis represents temperature (DEG C).Curve in curve map represents two phase separation temperatures of R32 cold-producing medium and various refrigerator oil.Each refrigerator oil each in, the region of the top compared with curve in curve map becomes the dissolving region that R32 cold-producing medium and refrigerator oil mix, and the region of the below compared with curve becomes the separated region that R32 cold-producing medium and refrigerator oil two are separated.In fig. 2, the ester oil of viscosity grade 32,46,68 and the ether oil of viscosity grade 32,68 is represented as various refrigerator oil.
As shown in Figure 2, in R32 refrigerant environment, have nothing to do with oil content, if temperature step-down, then cold-producing medium and oil do not fuse, and are separated into cold-producing medium and this two-phase of oil.On this point, the present application person finds that the characteristic of two phase separation temperatures relative to R32 cold-producing medium of oil and oil viscosity grade have relation.For under ether oil condition, the possibility that the type that there is viscosity grade 68 is separated at about-2 DEG C two, but, when the type for viscosity grade 32, to-30 DEG C, two also can not be caused to be separated.Under ester oil condition, the possibility that the type that there is viscosity grade 68 is separated at about-15 DEG C two, but, when the type for viscosity grade 32 or 46, to-42 DEG C, two also can not be caused to be separated.That is, viscosity grade is set low, have and be difficult to two to more low temperature and be separated, the trend of intermiscibility can be guaranteed to low temperature.Otherwise, if set high by viscosity grade, then there is the trend be separated at low-temperature region easy two.
In addition, with ether oil Comparatively speaking ester oil have and be difficult to two to more low temperature and be separated, the trend of intermiscibility can be guaranteed to low temperature.Usually, in the purposes of home-use air-conditioner, because the length of refrigerant piping is short, so, can be make the degree of 0 ~-5 DEG C as the serviceability temperature scope of lower limit, but, when being used in the air-conditioner of mansion use etc., because the length of refrigerant piping is long, so, exist-15 ~-20 DEG C degree use possibility.In addition, when for be used in refrigeration purposes, freezing purposes refrigerating machine, exist-35 ~-40 DEG C degree use possibility.
Here, " ether oil " in present specification represents the polyvinylether being particularly suitable as refrigerator oil and using.There is the characteristic identical with " ether oil " and can be used as in " the ethers oil " that refrigerator oil uses, except polyvinylether, also comprise the synthesis such as polyphenylene oxide, perfluoro-ether ether oil.In addition, " ester oil " in present specification represents the polyol ester being particularly suitable as refrigerator oil and using.As there is the characteristic identical with " ester oil " and can be used as in " Esters oil " that refrigerator oil uses, except polyol ester, also comprise the synthesis ester oils such as monoesters, diester, phosphate.
The low-temperature region of the curve map of Fig. 2 is only amplified the curve map represented by Fig. 3.In figure 3, on the basis representing the ether oil of viscosity grade 32 shown in Fig. 2 and the curve of the ester oil of viscosity grade 32,46 and the intermiscibility of R32 cold-producing medium, the curve of intermiscibility of R410A cold-producing medium of the ester oil of viscosity grade 32 represented by dashed line and the R32 cold-producing medium containing 50%.In R32 refrigerant environment, as mentioned above, with ethers oil (ether oil) Comparatively speaking Esters oil (ester oil) have and be difficult to two to more low temperature and be separated, the trend of intermiscibility can be guaranteed to low temperature.Recently, when the refrigerant loop of the Esters oil for employing general R410A cold-producing medium and viscosity grade 32, two phase separation temperatures are approximately-37 DEG C.
That is, two phase separation temperatures (-42 DEG C) when employing the Esters oil of R32 cold-producing medium and viscosity grade 32 or 46 are than two phase separation temperatures (-37 DEG C) step-down when employing the Esters oil of R410A cold-producing medium and viscosity grade 32.On the other hand, two phase separation temperatures (-15 DEG C) when employing the Esters oil of R32 cold-producing medium and viscosity grade 68 uprise than two phase separation temperatures (-37 DEG C) when employing the Esters oil of R410A cold-producing medium and viscosity grade 32.In addition, employing two phase separation temperatures (-30 DEG C or-2 DEG C) under the ethers oil condition of R32 cold-producing medium and viscosity grade 32 or 68 than two phase separation temperatures (-37 DEG C) when employing the Esters oil of R410A cold-producing medium and viscosity grade 32 uprises.Therefore, in the refrigerant loop of Esters oil using R410A cold-producing medium and viscosity grade 32, at alternative R410A cold-producing medium, when using R32 cold-producing medium (or the mix refrigerant containing more than 51% R32 cold-producing medium), if use the Esters oil of viscosity grade less than more than 32 46, then can use refrigerant loop without change.
[structure of screw compressor]
Then, the structure of the compressor of present embodiment is described.The compressor of present embodiment is the low pressure vessel type possessing cold-producing medium (example of fluid) and the lubricating oil sucked from suction inlet in closed container in the lump.Fig. 4 is the longitudinal section of the structure of the screw compressor 1 of an example of the compressor represented as present embodiment.As shown in Figure 4, screw compressor 1 has the compression mechanical part 30 of compressed refrigerant and drives the motor part 20 of compression mechanical part 30 to be housed in structure in closed container 10.Closed container 10 is divided into lower vessel portion 10a, container pars intermedia 10b and upper vessel portion 10c by 3.The oil conservator 11 stored the refrigerator oil that each sliding part lubricates is formed in the bottom of lower vessel portion 10a.In a reservoir, portion 10b is connected to suction line 12 as the suction inlet sucked by low pressure refrigerant in closed container 10.In addition, in a reservoir in portion 10b, fixedly support framework 33 in upper end, thereunder fixedly support the motor stator 21 of motor part 20, bottom thereunder fixedly support sub-frame 38.At upper vessel portion 10c, be connected to the outlet that discharge pipe 13 is discharged to the outside of closed container 10 as the cold-producing medium that will have compressed.
Motor part 20 is in order to be driven the pendulum movable orbiting scroll 32 of compression mechanical part 30 through main shaft 40 by compression mechanical part 30 compression refrigerant gas.The motor stator 21 that motor part 20 has the inner peripheral surface being fixed on closed container 10 and the motor rotor 22 be fixed on main shaft 40.Motor rotor 22, by being energized and rotary actuation to motor stator 21, makes the main shaft 40 to pendulum movable orbiting scroll 32 transmission of drive force rotate.The eccentric axial portion 40a rotatably chimeric with the oscillation bearing 34 of pendulum movable orbiting scroll 32 is formed in the upper end of main shaft 40.In the inside of main shaft 40, be provided with the oilhole 40c of the stream becoming the refrigerator oil being stored in oil conservator 11 from the lower end of main shaft 40 to upper end throughly.In addition, the balancer 48,49 for averaging out with pendulum movable orbiting scroll 32 relative to the pivot of main shaft 40 is respectively arranged with in the bottom of the top of main shaft 40 and motor rotor 22.
Compression mechanical part 30 has fixed eddy plate 31 and pendulum movable orbiting scroll 32.Fixed eddy plate 31 is fixed relative to the framework 33 being fixedly supported on container pars intermedia 10b.The overlapping portion 31b (example in vortex portion) of the swirl shape projection as involute curve shape that fixed eddy plate 31 has runner plate 31a, is straightened the surface of the side being arranged on runner plate 31a (being lower surface in this example).The central portion of fixed eddy plate 31 be formed will be compressed and become high pressure refrigerant gas discharge discharge port 31c.
Pendulum movable orbiting scroll 32 not carries out spinning motion relative to fixed eddy plate 31 but carries out revolution circumnutation.The overlapping portion 32b (example in vortex portion) of the swirl shape projection as involute curve shape that pendulum movable orbiting scroll 32 has runner plate 32a, is straightened the surface of the side being arranged on runner plate 32a (being upper surface in this example).Pendulum movable orbiting scroll 32 the face (thrust shaft bearing surface) of overlapping portion 32b forming surface opposite side (side contrary with discharge chambe) is provided with the thrust plate 42 becoming thrust bearing.The thrust shaft bearing surface of pendulum movable orbiting scroll 32 is supported through thrust plate 42 in axial direction by framework 33.In addition, be formed with in the substantially central portion in the face of the side contrary with discharge chambe of pendulum movable orbiting scroll 32 oscillation bearing 34 having round-ended cylinder shape.Rotatably hold in oscillation bearing 34 for make pendulum movable orbiting scroll 32 revolve round the sun circumnutation and supporting oscillation whirlpool dish 32 slide block 46.The eccentric axial portion 40a as slide block assembled shaft being arranged on the upper end of main shaft 40 relative to main shaft 40 is prejudicially inserted with in slide block 46.
Fixed eddy plate 31 and pendulum movable orbiting scroll 32 are assembled in closed container 10 under the state making the mutually opposite overlapping portion 31b of coiling direction and overlapping portion 32b engage.By being combined by the overlapping portion 32b of the overlapping portion 31b of fixed eddy plate 31 and pendulum movable orbiting scroll 32, between overlapping portion 31b and overlapping portion 32b, form the discharge chambe 35 that volume changes relatively.Seal 43 for preventing refrigrant leakage is set between the leading section of overlapping portion 31b and the upper surface of runner plate 32a.Equally, the seal 44 for preventing refrigrant leakage is set between the leading section of overlapping portion 32b and the lower surface of fixed eddy plate 31.In addition, between pendulum movable orbiting scroll 32 and framework 33, arranging the spinning motion in eccentric circumnutation for stoping pendulum movable orbiting scroll 32, the European ring (オ Le ダ system リ Application グ) 36 of revolution circumnutation can be carried out.The key portion 36a being formed in the upper surface of European ring 36 be slidably housed in be located at pendulum movable orbiting scroll 32 European groove (オ Le ダ system Ditch) 45 in, the key portion (not shown) being formed in lower surface is slidably housed in and is located in the European groove (not shown) of framework 33.
Framework 33 is fixed on the inner peripheral surface of closed container 10.Framework 33 fixed support fixed eddy plate 31 and through thrust plate 42 supporting oscillation whirlpool dish 32.In addition, the base bearing 37 of framework 33 through being arranged on the through hole of central part rotatably supports the upper section of the main shaft 40 be near eccentric axial portion 40a.The sleeve pipe 47 for making the main shaft 40 of this base bearing 37 through rotate smoothly is rotatably held in base bearing 37.
Sub-frame 38 is arranged on the below compared with framework 33, is fixed on the inner peripheral surface of closed container 10.Sub-frame 38 is parts of through hole through the being formed in central part rotatably inferior portion of supports main shaft 40.Bearing incorporating section 38a is set in through hole.In the 38a of bearing incorporating section, press-in is fixed for the outer ring of the ball bearing 39 of rotatably supports main shaft 40.
In addition, sub-frame 38 possesses the oil pump 41 of the displacement type to each sliding position supply refrigerator oil.Oil pump 41 links the lower end the pump shaft portion 40b transmitting revolving force to this oil pump 41 of being located at main shaft 40.Pump shaft portion 40b and main shaft 40 integrally formed.The oilhole 40c being arranged on the center of main shaft 40 is communicated with oil pump 41 in lower end side.
Cold-producing medium uses depletion of the ozone layer coefficient (ODP) to be the R32 cold-producing medium as HFC class (unitary system cryogen) of zero or contains the mix refrigerant of more than 51% R32 cold-producing medium by mass fraction.The material of the mass fraction less than 49% contained in this mix refrigerant to be depletion of the ozone layer coefficient be zero HFC cold-producing medium (such as, R125, R161 etc.), there is the halogenated hydrocarbons of the double bond of carbon (such as in refrigerant composition, be called as HFO-1234yf, HFO-1234ze, HFO-1243zf etc. of freon class low GWP cold-producing medium), in hydrocarbon (such as, as propane, the propylene of natural refrigerant) any one or multiple.
[action of screw compressor]
Then, the action of the screw compressor 1 of present embodiment is described.First, elemental motion is described.If supply electric power to motor stator 21, then main shaft 40 is by motor rotor 22 rotary actuation.If main shaft 40 is driven in rotation, then the eccentric axial portion 40a being arranged on the upper end of main shaft 40 rotates in oscillation bearing 34 through slide block 46, and driving force is passed to pendulum movable orbiting scroll 32.Now, the key portion 36a of one side of European ring 36 and the key portion (not shown) of the opposing party move back and forth respectively in the European groove 45 of pendulum movable orbiting scroll 32 and in the European groove (not shown) of framework 33, accordingly, put movable orbiting scroll 32 suppress from then carry out oscillating motion.That is, oscillating motion (circumnutation) is only transmitted from eccentric axial portion 40a to pendulum movable orbiting scroll 32.
Here, there is the framework 33 of the base bearing 37 of rotatably supports main shaft 40 and in central authorities, there is the sub-frame 38 that press-in secures the bearing incorporating section 38a of the outer ring of ball bearing 39 and be fixed on respectively in closed container 10.But, exist because precision when fixed frame 33 and sub-frame 38 is inconsistent, each precision of part be inconsistent, and between base bearing 37 and ball bearing 39, produce the situation of axle center dislocation.In addition, there is the situation producing flexure at main shaft 40.Due to the dislocation of these axle center, flexure, not necessarily parallel between main shaft 40 and base bearing 37, between main shaft 40 and ball bearing 39.Therefore, in order to make the sliding surface in base bearing 37 parallel, between main shaft 40 and base bearing 37, sleeve pipe 47 is accommodated.When produce as described above the axle center between base bearing 37 and ball bearing 39 dislocation, main shaft 40 flexure, main shaft 40 tilts relative to base bearing 37.But contacted with the inner peripheral surface of sleeve pipe 47 by the hinge portion 40e be arranged on main shaft 40, hinge portion 40e absorption dip, the outer peripheral face of sleeve pipe 47 always can slide abreast relative to base bearing 37.
Pendulum movable orbiting scroll 32 is slided in the slided scope of the planing surface of slide block 46 by the eccentric axial portion 40a of centrifugal force relative to main shaft 40.Contacted with the overlapping portion 31b of fixed eddy plate 31 by the pendulum overlapping portion 32b of movable orbiting scroll 32, form discharge chambe 35.The load that produces and be applied in the eccentric axial portion 40a of main shaft 40 for compressed refrigerant and the load of radial direction that produces because putting the centrifugal force of movable orbiting scroll 32.Accordingly, owing to producing flexure, so eccentric axial portion 40a is not necessarily parallel with oscillation bearing 34 at eccentric axial portion 40a.Therefore, for making the sliding surface in oscillation bearing 34 parallel, between eccentric axial portion 40a and oscillation bearing 34, slide block 46 is accommodated.When creating the flexure of eccentric axial portion 40a as described above, eccentric axial portion 40a tilts relative to oscillation bearing 34.But contacted with the planing surface of slide block 46 by the hinge portion 40d being arranged on eccentric axial portion 40a, hinge portion 40d absorption dip, the outer peripheral face of slide block 46 always can slide abreast relative to oscillation bearing 34.
Then, the flowing of cold-producing medium and refrigerator oil (lubricating oil) is described.Cold-producing medium in refrigerant loop is inhaled in closed container 10 from suction line 12, and the inhalation port (not shown) through framework 33 flows in discharge chambe 35.In addition, the refrigerator oil extracted from oil conservator 11 by oil pump 41, through the oilhole 40c in main shaft 40, to each sliding part supply in closed container 10, flows in discharge chambe 35.
As the sliding part in closed container 10, such as, between the runner plate 32a having pendulum movable orbiting scroll 32 and thrust plate 42, between the 31b side, overlapping portion of fixed eddy plate 31 and the 32b side, overlapping portion of pendulum movable orbiting scroll 32, be arranged between the seal 43 of the 31b front end, overlapping portion of fixed eddy plate 31 and the runner plate 32a (the tooth bottom surface between the 32b of overlapping portion) of pendulum movable orbiting scroll 32, between the seal 44 being arranged on the 32b front end, overlapping portion of pendulum movable orbiting scroll 32 and the runner plate 31a (the tooth bottom surface between the 31b of overlapping portion) of fixed eddy plate 31, be arranged on the upper surface of European ring 36 key portion 36a and be arranged on pendulum movable orbiting scroll 32 runner plate 32a on European groove 45 between, between the key portion (not shown) being arranged on the lower surface of European ring 36 and the European groove (not shown) being arranged on framework 33, between the outer peripheral face of oscillation bearing 34 and slide block 46, between the outer peripheral face of base bearing 37 and sleeve pipe 47 etc.
Such as, the lubricating oil leaking into the 32b forming surface side, overlapping portion of pendulum movable orbiting scroll 32 to lubricating between the pendulum runner plate 32a of movable orbiting scroll 32 and thrust plate 42 flows into discharge chambe 35 together with the cold-producing medium flowed into from the inhalation port of framework 33.The lubrication that the lubricating oil flowing into discharge chambe 35 to be used between 31b side, overlapping portion and 32b side, overlapping portion, between seal 43 and runner plate 32a, between seal 44 and runner plate 31a etc.
Although these sliding parts become high temperature along with slip, owing to being positioned at the space being inhaled into cold-producing medium that closed container 10 compares low temperature and flowing into, so, by the refrigerant cools flowed into.In addition, because suction line 12 is arranged near the inhalation port of framework 33 and motor stator 21 and motor rotor 22, so, by the refrigerant cools motor stator 21 and motor rotor 22 etc. of the comparison low temperature sucked from suction line 12.Because oil conservator 11 is also positioned at the space that the cold-producing medium that compares low temperature flows into, so, have lubricated the lubricating oil of each sliding part by the refrigerant cools comparing low temperature.
As the power supply supplying electric power to motor stator 21, can the general source power supply of frequency of utilization 50Hz or 60Hz, also can in order to make circulating mass of refrigerant variable, and use driving rotating speed can be made in the variable-frequency power sources of the range of 600 ~ 15000rpm.
Flow into the cold-producing medium of discharge chambe 35 and lubricating oil to be moved by the circumnutation of putting movable orbiting scroll 32 central side to fixed eddy plate 31 and pendulum movable orbiting scroll 32.Now, discharge chambe 35 comes compressed refrigerant and lubricating oil by making change in shape and making volume diminish gradually.Load for leaving at direction of principal axis is passed through to be acted on fixed eddy plate 31 and pendulum movable orbiting scroll 32 by the cold-producing medium that have compressed.This load is by thrust bearing the bearing with the face of overlapping portion 32b forming surface opposite side from pendulum movable orbiting scroll 32 be made up of thrust plate 42.
Passed at the discharge port 31c of fixed eddy plate 31 by the cold-producing medium that have compressed and lubricating oil at discharge chambe 35, by pressure differential, the dump valve 50 be arranged on fixed eddy plate 31 is pushed open, the discharge space 14 becoming high-voltage section in closed container 10 is passed, and discharges to closed container 10 from discharge pipe 13.The cold-producing medium be discharged and lubricating oil, at refrigerant loop Inner eycle, return the suction line 12 of screw compressor 1.
As explained above, the compressor of present embodiment is due to the low low pressure vessel type of the environment temperature that is lubricating oil, so, even if used together with R32 cold-producing medium or the mix refrigerant containing more than 51% R32 cold-producing medium by the low viscosity grade oil being difficult to be separated (Esters oil of viscosity grade less than more than 32 46 or ethers oil), also oil body can be guaranteed.Therefore, according to the present embodiment, cold-producing medium and lubricating oil separation under low temperature can be prevented, and the lubricity of the sliding parts such as bearing can be guaranteed.In addition, accordingly, the durability of compressor can be improved.
In addition, in the present embodiment, due to the low viscosity grade oil being difficult to be separated can be used, so, might not need, as making the oil be trapped in refrigerant loop return control compressor, add part, loop structure as in the past can be used.Therefore, according to the present embodiment, compressor, other the increase of manufacturing cost of freeze cycle constituent part can be suppressed.
In addition, in the present embodiment, due to cold-producing medium and lubricating oil separation under low temperature can be prevented, so, the mansion air conditioner that the refrigerating machine that the compressor of present embodiment can be applicable to use at low-temperature region, refrigerant loop are long.
In addition, in the present embodiment, due to R32 cold-producing medium or the mix refrigerant containing more than 51% R32 cold-producing medium can be used, so, can carrying capacity of environment be reduced, and can environmental protection property be improved.Because R32 cold-producing medium is the cold-producing medium that theoretical cooling ratio is large, so, the energy efficiency of freeze cycle can also be improved.
In addition, in the present embodiment, due to low viscosity grade oil can be used, so the oil sealing that can improve when freeze cycle is produced enters efficiency, and can improve oil extraction efficiency when freeze cycle is discarded.
In addition, in the compressor of present embodiment, use R32 cold-producing medium or contain the mix refrigerant of more than 51% R32 cold-producing medium and the Esters oil of viscosity grade less than more than 32 46.Accordingly, compare with the situation of the Esters oil of viscosity grade 32 with use R410A cold-producing medium, two phase separation temperature step-downs can be made.Therefore, compressor according to the present embodiment, can use without change to the refrigerant loop of the Esters oil using R410A cold-producing medium and viscosity grade 32.
Other embodiment.
The present invention is not limited to above-mentioned embodiment, can carry out various distortion.
Such as, in the above-described embodiment, enumerate with screw compressor, but the present invention also can be applicable to the various hermetic type compressors beyond Scrawl.
In addition, above-mentioned each embodiment, variation can combine to implement mutually.
Description of reference numerals
1: screw compressor; 10: closed container; 10a: lower vessel portion; 10b: container pars intermedia; 10c: upper vessel portion; 11: oil conservator; 12: suction line; 13: discharge pipe; 14: discharge space; 20: motor part; 21: motor stator; 22: motor rotor; 30: compression mechanical part; 31: fixed eddy plate; 31a: runner plate; 31b: overlapping portion; 31c: discharge port; 32: pendulum movable orbiting scroll; 32a: runner plate; 32b: overlapping portion; 33: framework; 34: oscillation bearing; 35: discharge chambe; 36: European ring; 36a: key portion; 37: base bearing; 38: sub-frame; 38a: bearing incorporating section; 39: ball bearing; 40: main shaft; 40a: eccentric axial portion; 40b: pump shaft portion; 40c: oilhole; 40d, 40e: hinge portion; 41: oil pump; 42: thrust plate; 43,44: seal; 45: European groove; 46: slide block; 47: sleeve pipe; 48,49: balancer; 50: dump valve.
Claims (5)
1. a compressor, described compressor is the compressor of low pressure vessel type, possesses closed container, described closed container has the suction inlet sucking fluid, the compression mechanical part compressing the above-mentioned fluid sucked from above-mentioned suction inlet and discharges the outlet of the above-mentioned fluid that be have compressed by compression mechanism portion, the above-mentioned fluid and lubricating oil that have sucked from above-mentioned suction inlet is possessed in the lump in above-mentioned closed container
It is characterized in that,
Above-mentioned fluid is R32 cold-producing medium or the mix refrigerant containing more than 51% R32 cold-producing medium,
Above-mentioned lubricating oil is Esters oil or ethers oil.
2. compressor as claimed in claim 1, is characterized in that,
Above-mentioned oil body grade (ISOVG) is more than 32 less than 46.
3. compressor as claimed in claim 1 or 2, is characterized in that,
Above-mentioned mix refrigerant contains less than the 49% HFC cold-producing medium comprising R125 or R161, comprise the halogenated hydrocarbons with the double bond of carbon of HFO-1234yf, HFO-1234ze or HFO-1243zf or comprise in the hydrocarbon of propane or propylene one or more.
4. the compressor as described in any one in claims 1 to 3, is characterized in that,
Compression mechanism portion is by forming discharge chambe by the combination of mutually opposite for coiling direction vortex portion.
5. compressor as claimed in claim 4, is characterized in that,
Compression mechanism portion has:
Fixed eddy plate and pendulum movable orbiting scroll, they possess the mutually opposite above-mentioned vortex portion of coiling direction respectively;
Oscillation bearing, it is arranged on the side contrary with discharge chambe of above-mentioned pendulum movable orbiting scroll;
Framework, it supports the thrust shaft bearing surface of above-mentioned pendulum movable orbiting scroll through thrust plate;
Main shaft, it is to above-mentioned swing whirlpool dish transmission of drive force, and the through base bearing being arranged on the central part of said frame, link with the oil pump for above-mentioned lubricating oil is supplied to each sliding part;
Slide block, it is rotatably contained in above-mentioned oscillation bearing; And sleeve pipe, it is rotatably contained in above-mentioned base bearing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2013/055972 WO2014136207A1 (en) | 2013-03-05 | 2013-03-05 | Compressor |
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| CN105051465A true CN105051465A (en) | 2015-11-11 |
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| CN201380074197.7A Pending CN105051465A (en) | 2013-03-05 | 2013-03-05 | Compressor |
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| JP (1) | JP5911637B2 (en) |
| CN (1) | CN105051465A (en) |
| WO (1) | WO2014136207A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111684158A (en) * | 2018-02-06 | 2020-09-18 | 三菱电机株式会社 | Compressor and refrigeration cycle device |
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| CN1234429A (en) * | 1998-03-13 | 1999-11-10 | 三菱电机株式会社 | Refrigerant circulation system, refrigerant compressor and refrigeration circulation using said refrigrant compressor |
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Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2014136207A1 (en) | 2017-02-09 |
| WO2014136207A1 (en) | 2014-09-12 |
| JP5911637B2 (en) | 2016-04-27 |
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