CN103089627B - Rotary compressor - Google Patents
Rotary compressor Download PDFInfo
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- CN103089627B CN103089627B CN201110418067.3A CN201110418067A CN103089627B CN 103089627 B CN103089627 B CN 103089627B CN 201110418067 A CN201110418067 A CN 201110418067A CN 103089627 B CN103089627 B CN 103089627B
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- refrigeration agent
- separating device
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- seal container
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Abstract
A kind of rotary compressor, it can avoid the dimension enlargement of seal container when reducing the oil mass of discharging to seal container outside by centrifugation, and suppresses cost to increase.Rotary compressor (10) is received electrodynamic element (14) and the rotation/compression mechanism section (18) that driven by the running shaft (16) of electrodynamic element (14) and is formed in seal container (12).Rotation/compression mechanism section (18) has upper cylinder (38) and upper support member (54), its cylinder (38) has the pressing chamber at internal compression refrigeration agent, this upper support member (54) seals this pressing chamber and has discharge anechoic chamber (62), refrigeration agent in this cylinder (38) after compression is discharged to this discharge anechoic chamber (62), also have at the upper oil separating device (90) formed of this upper support member (54), this oil separating device (90) carries out centrifugation to the oil be discharged in the refrigeration agent of discharging anechoic chamber (62).
Description
Technical field
The present invention relates to a kind of in seal container, receive electrodynamic element and driven by this electrodynamic element rotation/compression mechanism section and the rotary compressor formed.
Background technique
At present, bosom die mould multistage (two-stage) compression type rotary compressor that this compressor such as has the first and second rotary compression elements is configured to the rotation/compression mechanism section being accommodated with electrodynamic element and being driven by this electrodynamic element in seal container.Refrigerant gas is sucked into the low pressure chamber side of cylinder from the suction port of the first rotary compression element, and is become middle pressure by the action of rotor and blade by compressing, and then discharges in seal container from the high pressure side of cylinder via exhaust port, discharge anechoic chamber.Middle compression refrigerant gas in this seal container is sucked into the low pressure chamber side of cylinder from the suction port of the second rotary compression element, and carry out second level compression by the action of rotor and blade and become high-temperature high-pressure refrigerant gas, then from side, hyperbaric chamber via exhaust port, discharge anechoic chamber and discharge to the outside of compressor.
In addition, the bottom of seal container is oily memory section, by being arranged on the oil pump (oil supplying device) of one end (lower end) of running shaft, from oily memory section, draws oil, and oil is supplied to the slide part etc. of rotation/compression mechanism section, thus carry out lubricating and sealing.But, as mentioned above, the oil be mixed in refrigerant gas in first rotary compression element after compression is expelled in seal container, and in the process of space movement in this seal container, be separated from refrigerant gas to a certain extent, but the oil be mixed in the refrigerant gas in the second rotary compression element after compression, directly discharges to the outside of compressor together with refrigerant gas.
Therefore, there is the low on fuel in oily memory section, sliding capability and sealability decline such problem.In addition, also there is the oil being discharged to compressor outside and hinder refrigeration agent to circulate in refrigerant circuit, refrigerant circuit is brought to the problem of baneful influence.On the other hand, consider and connect oil separator on the pipe arrangement of seal container outside, and the oil be separated from discharging refrigerant gas is returned to the scheme in compressor, but the problems such as installation space increase can be produced.These problems produce too to be become in internal high pressure (single-stage) the formula rotary compressor of final pressure at seal container, but be not limited to bosom die mould rotary compressor, not becoming in seal container in the rotary compressor of final head pressure is also extremely serious problem.
So, propose the oily separating mechanism arranging between rotation/compression mechanism section and seal container inner face and utilize centrifugal force separating oil from the refrigerant gas that the second rotary compression element is discharged, thus from the refrigeration agent of discharging to seal container separating oil, the oil after separation is made to flow to the oily memory section (for example, referring to patent documentation 1) of seal container inner bottom part.
Patent documentation 1:(Japan) JP 2005-105986 publication
Patent documentation 2:(Japan) JP 2005-105985 publication
But, arrange between rotation/compression mechanism section and seal container in the prior art of oily separating mechanism, have to correspondingly at least make the radial dimension of seal container to increase.In addition, because the number of components forming compressor also significantly increases, therefore also there is the problem that cost increases.
So, propose the oily separating mechanism not arranging between rotation/compression mechanism section and seal container and utilize centrifugal force, but close the discharge anechoic chamber for forming the second rotary compression element supporting part recess lid on the scheme of oil separator is set, but, cause originally only guaranteeing that the thickness of the lid that certain intensity is just passable increases, the axial direction dimension of such seal container just becomes problem, and exist in Horizontai rotary compressor for becoming complicated problem easily but in vertical rotary compressor from the path of discharging anechoic chamber and flow to the refrigeration agent of the oily separating mechanism in lid (such as, with reference to above-mentioned patent documentation 2).
Summary of the invention
The present invention is formed in order to the problem solved in related art, and its object, for providing a kind of rotary compressor, can be avoided the dimension enlargement of seal container when reducing the oil mass of discharging to seal container outside by centrifugation, and suppress cost to increase.
Rotary compressor of the present invention, be configured in seal container, receive electrodynamic element and by the shaft-driven rotation/compression mechanism section of the rotation of this electrodynamic element, it is characterized in that, rotation/compression mechanism section has: cylinder, and it has the pressing chamber at internal compression refrigeration agent; Packaged unit, its closed compression room also has discharge chamber, and the refrigeration agent in this cylinder after compression is discharged to this discharge chamber; Also have oil separating device, this oil separating device is formed on this packaged unit, carries out centrifugation to the oil be discharged in the refrigeration agent of discharge chamber.
According to the present invention, owing to being configured to receive in seal container in electrodynamic element and the rotary compressor by the shaft-driven rotation/compression mechanism section of the rotation of this electrodynamic element, rotation/compression mechanism section has: cylinder, and it has the pressing chamber at internal compression refrigeration agent; Packaged unit, it is closed described pressing chamber and has discharge chamber, and the refrigeration agent in this cylinder after compression is discharged to this discharge chamber; Also there is oil separating device, this oil separating device is formed on this packaged unit, centrifugation is carried out to the oil be discharged in the refrigeration agent of described discharge chamber, therefore, oil separating device can be utilized effectively to be carried out centrifugation to compressing in cylinder and being discharged to the oil be mixed in the refrigeration agent in discharge chamber, the oil mass of discharging to rotary compressor outside can be reduced significantly.
Now, owing to forming oil separating device on packaged unit, therefore, it is possible to prevent the radial dimension of seal container from expanding, and on the packaged unit of the inherently certain thickness size for forming discharge chamber, form oil separating device, thus the axial direction dimension of the seal container that can also prevent the thickness size of expansion packaged unit and cause, effectively avoid the dimension enlargement owing to arranging the oil separating device utilizing centrifugal force and the rotary compressor caused thus.
In addition, by forming oil separating device on the packaged unit being configured with discharge chamber, can on packaged unit concentrated setting discharge chamber and oil separating structure, thus raising processability while, can also shorten and simplifies from discharge chamber arrival oil separating device stream.And, due to the special mechanism without the need to arranging between rotation/compression mechanism section and seal container for oil separating device, therefore further suppress the increase of number of components, thus farthest can also suppress the increase of consequent cost of production and component costs.
In above-mentioned rotary compressor, it is characterized in that, have: expulsion valve, it is configured in discharge chamber; Refrigerant discharge leader, it is connected with seal container; Drain passageway, it is formed on packaged unit, discharge chamber is communicated with refrigerant discharge leader, for just externally being discharged without seal container is inner by the refrigeration agent being discharged to discharge chamber; Oil separating device is formed with the form be located between expulsion valve and drain passageway.
In above-mentioned rotary compressor, it is characterized in that, rotation/compression mechanism section has the first and second rotary compression elements, the refrigeration agent compressed by the first rotary compression element is discharged to seal container inside, to the cylinder compression of refrigeration agent at formation second rotary compression element of this seal container inside be discharged to, and discharge to discharge chamber.
In addition, according to the present invention, on the basis of above-mentioned formation, owing to having: expulsion valve, it is configured in discharge chamber, refrigerant discharge leader, it is connected with seal container, drain passageway, it is formed on packaged unit, discharge chamber is communicated with refrigerant discharge leader, for just externally being discharged without seal container is inner by the refrigeration agent being discharged to discharge chamber, oil separating device is formed with the form arranged between expulsion valve and drain passageway, therefore, such as rotation/compression mechanism section is made up of the first and second rotary compression elements, refrigeration agent after compression in the first rotary compression element is discharged in seal container, the refrigeration agent be discharged in this seal container is compressed in the cylinder of formation second rotary compression element, and in the rotary compressor of discharge chamber discharge, oil separating device can be utilized effectively to suppress the outflow of the oil of rotary compressor, make refrigeration agent from discharge chamber without in seal container, in seal container, namely do not carry out oil be separated, discharge directly to outside.
Now, because oil separating device is formed with the form arranged between expulsion valve and drain passageway, therefore, it is possible to make the flowing of the refrigeration agent arriving drain passageway from expulsion valve via discharge chamber and oil separating device smooth and easy, but also stream can be made the shortest.
In above-mentioned rotary compressor, it is characterized in that, oil separating device has: cylindric space portion, and it is formed on packaged unit, and the central shaft of this space portion is set to above-below direction; Refrigeration agent introduction part, it is for importing this space portion by refrigeration agent; Refrigeration agent leading-out portion, its central shaft being positioned at space portion enters this space portion from top, and the lower end of this refrigeration agent leading-out portion is at this space portion inner opening; Oil outflow portion, it is communicated with the lower end of space portion; Space portion is towards the tapered shape of oily outflow portion, rotate while decline from the refrigeration agent in refrigeration agent introduction part inflow space portion along the inner peripheral surface of this space portion, and flow into the opening of refrigeration agent leading-out portion, and isolated oil flows to oily outflow portion from refrigeration agent.
According to the present invention, on the basis of above-mentioned each invention, oil separating device has: cylindric space portion, and it is formed on packaged unit, and the central shaft of this space portion is set to above-below direction; Refrigeration agent introduction part, it is for importing this space portion by refrigeration agent; Refrigeration agent leading-out portion, its central shaft being positioned at space portion enters this space portion from top, and the lower end of this refrigeration agent leading-out portion is at this space portion inner opening; Oil outflow portion, it is communicated with the lower end of space portion; Space portion is towards the tapered shape of oily outflow portion, rotate while decline from the refrigeration agent in refrigeration agent introduction part inflow space portion along the inner peripheral surface of this space portion, and flow into the opening of refrigeration agent leading-out portion, and isolated oil is to the oily outflow portion of stream from refrigeration agent, therefore, it is possible to make refrigeration agent rotate in the space portion of oil separating device, and utilize centrifugal force effectively to make oil be separated, make refrigeration agent flow into refrigeration agent leading-out portion, the oil after separation successfully to be turned back in seal container via oily outflow portion.
In above-mentioned rotary compressor, it is characterized in that, packaged unit forms multiple oil separating device, each oil separating device is connected in series.
Like this, packaged unit forms multiple oil separating device, each oil separating device is connected in series, more effectively the oil be mixed in refrigeration agent can be separated, and the discharge of the oil to seal container outside can be reduced.
In above-mentioned rotary compressor, it is characterized in that, packaged unit forms multiple oil separating device, and refrigeration agent is shunted to each oil separating device.
Like this, packaged unit forms multiple oil separating device, refrigeration agent is shunted to each oil separating device, thus while the pressure loss suppressing to be produced by flow path resistance increases, more effectively the oil be mixed in refrigeration agent can be separated, and the discharge of the oil to seal container outside can be reduced.
According to the present invention, a kind of rotary compressor can be provided, the dimension enlargement of seal container when reducing the oil mass of discharging to seal container outside by centrifugation can be avoided, and suppress cost to increase.
Accompanying drawing explanation
Fig. 1 is the longitudinal sectional view of the rotary compressor being suitable for the embodiment of the present invention.
Fig. 2 is the longitudinal sectional view (embodiment 1) of the rotation/compression mechanism section of the rotary compressor of Fig. 1.
Fig. 3 is the plan view in the rotation/compression mechanism section of the rotary compressor of Fig. 1 except upper cap and packing ring.
Fig. 4 is the enlarged view of the oily separating mechanism part of Fig. 3.
Fig. 5 is the plan view (embodiment 2) in the rotation/compression mechanism section of the rotary compressor of other embodiments of the invention except upper cap.
Fig. 6 is the expanded view of the oily separating mechanism part of Fig. 5.
Fig. 7 is the plan view (embodiment 3) in the rotation/compression mechanism section of the rotary compressor of the present invention other embodiment another except upper cap.
Fig. 8 is the expanded view of the oily separating mechanism part of Fig. 7.
Description of reference numerals
10 rotary compressors
12 seal containers
14 electrodynamic elements
16 running shafts
18 rotation/compression mechanism section
32,34 rotary compression elements
36 middle demarcation strips
38,40 upper and lower air cylinders
54 upper support member (packaged unit)
56 lower support member
62 discharge anechoic chamber's (discharge chamber)
65 packing rings
66 upper caps
70 drain passageways
72 expulsion valves
90 oily separating mechanisms (oil separating device)
91 space portions
95 refrigeration agent introduction parts
97 refrigeration agent leading-out portions
98 pores (oily outflow portion)
Embodiment
Embodiments of the present invention are described in detail below based on accompanying drawing.
Fig. 1 represents the longitudinal sectional view of the rotary compressor 10 of the embodiment of the present invention, Fig. 2 represents the longitudinal sectional view of rotation/compression mechanism section 18, Fig. 3 represents the plan view in rotation/compression mechanism section 18 except upper cap 66 and packing ring 65, and Fig. 4 represents the enlarged view of the major component of Fig. 3.It should be noted that, for ease of being described, in each figure the position relationship of parts and actual disposition different, thus different from the position relationship of reality.
In the various figures, 10 is the vertical rotary compressor of bosom die mould multistage (two-stage) compression type as one embodiment of the invention, this rotary compressor 10 comprises: the seal container 12 of the longitudinal type cylindrical shape be made up of steel plate, configuration is contained in the electrodynamic element (driver element) 14 on the upside of the inner space of this seal container 12, rotation/compression mechanism section 18, wherein, rotation/compression mechanism section 18 is configured in the downside of this electrodynamic element 14, and comprise the first rotary compression element 32 (first order) driven by the running shaft 16 of electrodynamic element 14 and the second rotary compression element 34 (second level) be positioned on the upside of this first rotary compression element 32.
Seal container 12 comprises: as oily memory section 13 bottom, be accommodated with the vessel 12A of electrodynamic element 14 and rotation/compression mechanism section 18, close roughly bowl-shape end cap (lid) 12B of upper opening of this vessel 12A, and, the terminal (omission distribution) 20 for supplying electric power to electrodynamic element 14 are installed in the upper surface center of this end cap 12B.
Electrodynamic element 14 comprises stator 22 that the inner peripheral surface along the upper space of seal container 12 installs in the form of a ring, inside this stator 22, arrange some gaps and insert the rotor 24 of configuration.This rotor 24 is fixed on by center and on the described running shaft 16 that vertically (axis of seal container 12) extends.
Stator 22 has the duplexer 26 of the electromagnetic steel plate of stacked ring-type, the stator coil 28 be wrapped in around (concentratred winding) mode by string in the teeth portion of this duplexer 26.In addition, rotor 24 is also formed by the duplexer 30 of electromagnetic steel plate in the same manner with stator 22, inserts permanent magnet MG and form in this duplexer 30.
Described rotation/compression mechanism section 18 has: upper and lower air cylinders 38,40, forms the first and second rotary compression elements 32,34 respectively, and has the pressing chamber at internal compression refrigeration agent; Upper lower rotor part 46,48, with the eccentric part up and down 42 be separately positioned in these two upper and lower air cylinders 38,40,44 chimeric and carry out eccentric rotary; Middle demarcation strip 36, is arranged between upper and lower air cylinders 38,40 and between rotor 46,48 and separates the first and second rotary compression elements 32,34; Blade 50,52, is connected on rotor 46,48 and also respectively the pressing chamber in upper and lower air cylinders 38,40 is divided into low pressure chamber side and side, hyperbaric chamber; As supporting part and the upper support member of packaged unit (closed upper part parts) 54 and lower support member (bottom packaged unit) 56, close the upside opening surface of pressing chamber of upper cylinder 38 and the open lower side face of the pressing chamber of lower cylinder 40 and there is bearing 54A, 54B of running shaft 16.
Upper support member 54 and lower support member 56 are provided with suction passage 60,61 and there is as discharge chamber the discharge anechoic chamber 62,64 of a constant volume, wherein, suction passage 60,61 is communicated with (Fig. 3) with the inside of upper and lower air cylinders 38,40 respectively by not shown suction port, discharges anechoic chamber 62,64 and makes the depression of the part above and below lower support member 56 of upper support member 54 respectively by cut etc. and form recess and by upper cap 66, lower cover 68 top-open of closed each recess and lower aperture and formed respectively.That is, upper support member 54 and lower support member 56 have certain thickness size to be recessed to form each discharge anechoic chamber 62,64.It should be noted that, above-mentioned bearing 54A, 56A also can be formed in described upper cap 66, lower cover 68.
Now, between upper support member 54 and upper cap 66, be folded with the packing ring 65 (although not shown, being folded with packing ring too between lower support member 56 and lower cover 68) of sealing.In addition, the periphery of lower cover 68 is fixed in lower support member 56 from below by kingbolt 129....Front end and the upper support member 54 of this kingbolt 129... are threadedly engaged.
It should be noted that, the discharge anechoic chamber 64 of the first rotary compression element 32 is communicated with by access with seal container 12 inside.This access is the not shown hole of through lower support member 56, upper support member 54, upper cap 66, upper and lower air cylinders 38,40 and middle demarcation strip 36.Now, be equipped with middle discharge tube 121 in the upper end of access, the refrigeration agent of middle pressure is discharged in seal container 12 from this middle discharge tube 121.
In addition, arrange with retaining predetermined distance above the upper cap 66 of electrodynamic element 14 in seal container 12.The periphery of this upper cap 66 is fixed on upper support member 54 from top by kingbolt 78....Front end and the lower support member 56 of this kingbolt 78... are threadedly engaged.
On the other hand, be formed with the oilhole 80 of Vertical direction in running shaft 16 along axle center, this oilhole 80 is communicated with the oil pump 84 of lower end.Oil in oily memory section 13 is sucked in oilhole 80 by the rotation of running shaft 16 by oil pump 84.Running shaft 16 is also formed the transverse direction be communicated with this oilhole 80 oil supply hole 82 (upper and lower eccentric part 42,44 and they be formed up and down multiple), and bearing from oil supply hole 82 to rotary compressor portion 18 54A, 56A of being configured to from and other slide part etc. are for oil supply.
Further, now use carbon dioxide (CO2) as refrigeration agent, the final pressure of rotary compressor 10 becomes high.In addition, as the oil of lubricant oil, use the known oil such as such as mineral oil, PAG (ployalkylene glycol), alkylbenzene oil, ether oil, ester oil.
On the side of the vessel 12A of seal container 12, corresponding to the position of upper support member 54 and the suction passage 60,61 of lower support member 56 and the upside (roughly corresponding with the lower end of electrodynamic element 14 position) of upper cap 66, be welded with sleeve 141,142,143,144 respectively.Sleeve 141, about 142 adjoins, and simultaneously sleeve 143 is positioned at the position of roughly to depart from 90 degree with sleeve 144.
Further, in sleeve 141, insert the one end of the refrigeration agent ingress pipe 92 be connected with for importing refrigerant gas in upper cylinder 38, one end of this refrigeration agent ingress pipe 92 is communicated with the suction passage 60 of upper cylinder 38.This refrigeration agent ingress pipe 92 arrives sleeve 144 by the upside of seal container 12, and the other end inserts and is connected in sleeve 144, and is communicated with in seal container 12.
In sleeve 142, insert the one end of the refrigeration agent ingress pipe 94 be connected with for importing refrigerant gas in lower cylinder 40, one end of this refrigeration agent ingress pipe 94 is communicated with the suction passage 61 of lower cylinder 40.In addition, insert in sleeve 143 and be connected with refrigerant discharge leader 96, and be communicated with the drain passageway 70 (Fig. 3) that upper support member 54 is arranged.
Further, the upper support member 54 of the second rotary compression element 34 is also configured with the oily separating mechanism 90 as oil separating device of the present invention, for will to compress in the second rotary compression element 34 and oil in the refrigeration agent of discharging is separated.
Below, above-mentioned oily separating mechanism 90 is described.Around the bearing 54A of upper support member 54, be formed with recess as shown in Figure 3, as previously mentioned, utilize upper cap 66 to close via the top-open of packing ring 65 by this recess, thus in recess, form the discharge anechoic chamber 62 of the second rotary compression element 34.In this discharge anechoic chamber 62, be configured with expulsion valve 72, the not shown exhaust port be communicated with the inside of upper cylinder 38 closed by expulsion valve 72.This expulsion valve 72 opens exhaust port when the hyperbaric chamber of upper cylinder 38 rises to the head pressure of regulation.
In addition, described drain passageway 70 is formed in the roughly opposition side of expulsion valve 72 in the mode clamping bearing 54A with expulsion valve 72, and is communicated with discharge anechoic chamber 62.And, discharge anechoic chamber 62 is separated into expulsion valve 72 side (62A) and drain passageway 70 side (62B) anechoic chamber by partition wall 54B, 54C, partition wall 54B, 54C are formed in upper support member 54 in the mode clamping bearing 54A in the position of roughly opposition side, in a partition wall 54C, be configured with oily separating mechanism 90 of the present invention.
This oily separating mechanism 90 has: central shaft is set to the space portion 91 of the cylindrical shape of above-below direction, by utilization cutting etc., the recess caved in of upper support member 54 is formed above; Refrigeration agent introduction part 95, being formed with the rising wood opening of bearing 54A opposition side at this space portion 91; Refrigeration agent leading-out portion 97, the central shaft being positioned at space portion 91 enters space portion 91 from top, lower end in this space portion 91 to lower opening; Pore 98, as oily outflow portion, is connected to form with the lower end of space portion 91.
The bottom of above-mentioned space portion 91 towards the pore 98 of lower end in the tapered funnel shaped of internal diameter (inverted conical shape), pore 98 extends from the lower end of space portion 91 towards seal container 12 direction in upper support member 54, and is communicated with in seal container 12 at this seal container 12 inner opening.Refrigeration agent imports road 95 and is communicated with the discharge anechoic chamber 62 (representing with 62A in Fig. 3, Fig. 4) of expulsion valve 72 side via importing path 99, refrigeration agent in this discharge anechoic chamber 62 is directed in this space portion 91 from refrigeration agent introduction part 95 along the tangent direction of the circle centered by the central shaft of space portion 91, thus rotates along the inner face of space portion 91.Further, the upper cap 66 of using above of these space portions 91 and refrigeration agent introduction part 95 is closed.
The interval of regulation is retained between the inner face of described refrigeration agent leading-out portion 97 and space portion 91 around, refrigeration agent leading-out portion 97 from the lower end (lower end) of this space portion 91 inner opening by upper cap 66 rise, and again enter in upper cap 66 via the upside of upper cap 66, and discharge anechoic chamber 62 (among Fig. 3, Fig. 4 with the 62B represent) inner opening of its other end of another aspect in drain passageway 70 side.It should be noted that, in fact, this refrigeration agent leading-out portion 97 comprises: two through holes being formed in upper cap 66 100,101, to connect in the upside of upper cap 66 two through holes 100,101 roughly inverted U-shaped pipe arrangement 102, to enter in space portion 91 and lower end forms the pipe arrangement 103 of a described lower end.Thus, oily separating mechanism 90 is installed between expulsion valve 72 and drain passageway 70.
By forming above, action is below described.When the stator coil 28 of electrodynamic element 14 is energized via terminal 20 and not shown distribution, electrodynamic element 14 starts and rotor 24 rotates.By this rotation, the upper lower rotor part 46,48 chimeric with on the eccentric part up and down 42,44 that running shaft 16 is wholely set carries out foregoing eccentric rotary in upper and lower air cylinders 38,40.
Thus, the low pressure refrigerant gas of the low pressure chamber side of lower cylinder 40 is sucked into via refrigeration agent ingress pipe 94 and the never illustrated suction port of suction passage 61 being formed at lower support member 56, middle pressure is compressed into by the action of rotor 48 and blade 52, from the side, hyperbaric chamber of lower cylinder 40, discharged in seal container 12 from middle discharge tube 121 via not shown described access by the discharge anechoic chamber 64 that not shown exhaust port, lower support member 56 are formed.Thus, seal container 12 inside becomes middle pressure.It should be noted that, sometimes reduce because discharge anechoic chamber 64 is formed as making the stream of flow of refrigerant sometimes expand, thus obtain erasure effect.
Further, in the middle of in seal container 12, the refrigerant gas of pressure from sleeve 144 out, via refrigeration agent ingress pipe 92 and the suction passage 58 being formed at upper support member 54, is sucked into the low pressure chamber side of upper cylinder 38 from suction port 60.In the middle of after suction, the refrigerant gas of pressure is carried out second level compression by the action of rotor 46 and blade 50 and is become the refrigerant gas of High Temperature High Pressure (final pressure), and from side, hyperbaric chamber by not shown described exhaust port, discharge from the discharge anechoic chamber 62 (62A) that expulsion valve 72 is formed to upper support member 54.Formed in the stream of the flow of refrigerant mode sometimes narrowed that sometimes broadens owing to discharging anechoic chamber 62, thus obtain erasure effect.Be discharged to and discharge refrigeration agent in anechoic chamber 62 as shown in the arrow in Fig. 3, Fig. 4, discharge to space portion 91 through importing path 99 and importing road 95 from refrigeration agent.
Now, refrigerant gas and be mixed into the oil in this refrigerant gas and discharge along the inner face of space portion 91, and the refrigerant gas after discharging and oil utilize effect of inertia when discharging, rotate in the interval (gap) spirally formed between the pipe arrangement 103 of refrigeration agent leading-out portion 97 and the inner peripheral surface of the space portion 91 outside it on one side, decline (Fig. 2) to space portion 91.
By the centrifugal force produced because of rotation now, the oil be mixed in refrigerant gas is separated from refrigerant gas, and be attached on inner face of space portion 91 etc., the pore 98 be communicated with the lower end of space portion 91 is arrived along this inner face, as indicated by arrows with dashed lines in figure 2, the oily memory section 13 of the bottom of seal container 12 is flowed to by pore 98.
On the other hand, be separated fuel-displaced refrigerant gas and guided by the shape that the front end of space portion 91 attenuates and assemble at center, become upward flow and internally flow into from pipe arrangement 103 lower ending opening of refrigeration agent leading-out portion 97.The refrigerant gas flowed in refrigeration agent leading-out portion 97 is as shown in the solid arrow in each figure, sequentially pass through pipe arrangement 103, through hole 100, pipe arrangement 102, through hole 101 enter in the discharge anechoic chamber 62 (62B) of drain passageway 70 side, arrive drain passageway 70 via this inside, discharge anechoic chamber 62.Then, refrigerant gas flows out in refrigerant discharge leader 96, and externally discharges, and thus, being discharged to the refrigerant gas of discharging in anechoic chamber 62 just can externally can discharge without seal container 12 inside.
So, by the oil be mixed in the refrigerant gas of compression in the second rotary compression element 34 being carried out centrifugation with oily separating mechanism 90, can effectively the oil be mixed in refrigerant gas be separated.Thus, due to the oily discharge capacity of discharging from compressor 10 can be made significantly to reduce, therefore, it is possible to avoid the rough sledding of the low on fuel in compressor 10 with preventing trouble before it happens and to the rough sledding bringing baneful influence in refrigerant circuit.
Now, because oily separating mechanism 90 is arranged in upper support member 54, therefore do not prevent the radial dimension of seal container 12 from expanding complete setting.In addition, by forming oily separating mechanism 90 for forming having in the upper support member 54 of original certain thickness size of anechoic chamber 62 of discharge, without the need to expanding the thickness size of upper support member 54, the expansion of the axial dimension of seal container 12 therefore can also be prevented.Arranged by these, effectively can avoid the dimension enlargement owing to arranging the oily separating mechanism 90 adopting centrifugal force and the rotary compressor 10 caused.
In addition, owing to forming oily separating mechanism 90 in the upper support member 54 being configured with discharge anechoic chamber 62, noise reduction therefore can be used for the oily structure concentrated setting be separated in upper support member 54.Namely, owing to forming the recess for discharging anechoic chamber 62 and the recess for space portion 91 by cutting etc. in upper support member 54, and pore 98 can complete setting, therefore, with form the situation of oily separating mechanism 90 on other parts forming rotation/compression mechanism section 18 compared with, processability can be improved significantly.And, be the shortest from discharging anechoic chamber 62 to the stream of oily separating mechanism 90, but also there is the effect making its simplifying shapes.
And, owing to being substantially used for the special mechanism of oily separating mechanism 90 without the need to setting between rotation/compression mechanism section 18 and seal container 12, therefore also can the increase of suppression component quantity, thus, can the increase of cost of production and component costs be restricted to minimum.
And, due to oily separating mechanism 90 is configured to be arranged between expulsion valve 72 and drain passageway 70, therefore, it is possible to utilize oily separating mechanism 90 effectively to suppress the outflow of the oil of rotary compressor 10, make refrigerant gas from the discharge anechoic chamber 62 of embodiment without in seal container 12, namely, in seal container 12, do not carry out oil be separated, externally discharge.In addition, the flowing arriving the refrigeration agent of drain passageway 70 via discharge anechoic chamber 62 and oily separating mechanism 90 from expulsion valve 72 is more level and smooth, and stream also can be set to beeline.
In addition, the space portion 91 of oil separating mechanism 90 is towards the tapered shape of pore 98, the inner peripheral surface flowing into this space portion 91 of refrigerant gas one edge of space portion 91 from refrigeration agent introduction part 95 rotates while decline, and while the opening flowing into refrigeration agent leading-out portion 97, oil after refrigerant gas is separated flows in pore 98, therefore, it is possible to make refrigerant gas rotate in the space portion 91 of oily separating mechanism 90, and utilize centrifugal force effectively to make oil be separated, refrigerant gas is made to flow in refrigeration agent leading-out portion 97, and the oil after being separated successfully can turn back to via pore 98 in the oily memory section 13 in seal container 12.
[embodiment 2]
Below, Fig. 5 and Fig. 6 represents plan view (except upper cap 66 and packing ring 65) and its expanded view of the rotation/compression mechanism section 18 of the rotary compressor 10 of other embodiments of the invention.Now, oil separating mechanism 90 is provided with two places (90A, 90B) on the partition wall 54C of upper support member 54, the importing path 99 be communicated with the refrigeration agent introduction part 95 of the first oily separating mechanism 90A, be communicated with the discharge anechoic chamber 62 (62A) of expulsion valve 72 side, the refrigeration agent leading-out portion 97 of oil separating mechanism 90A is communicated with the importing path 99 of the second oily separating mechanism 90B, and the refrigeration agent leading-out portion 97 of this second oily separating mechanism 90B is communicated with the discharge anechoic chamber 62 (62B) of drain passageway 70 side.
Namely, in this embodiment, two oily separating mechanisms 90 (90A, 90B) are formed in upper support member 54, and they are connected in series.Thus, the refrigerant gas of discharging in anechoic chamber 62 (62A) is discharged to from expulsion valve 72, first after the first oily separating mechanism 90 (90A) is by oily centrifugation, then the second oily separating mechanism 90 (90B) by remaining oily centrifugation, and final arrive drain passageway 70.
According to this structure, effectively the oil be mixed in refrigerant gas can be separated, and the discharge of the oil flowed out to seal container outside can be reduced significantly.It should be noted that, although in this embodiment, form oily separating mechanism 90 at two places and they are connected in series, being not limited thereto, also can be formed in more than three places and be connected in series.
[embodiment 3]
Below, Fig. 7 and Fig. 8 represents plan view (except upper cap 66 and packing ring 65) and its expanded view of the rotation/compression mechanism section 18 of the rotary compressor 10 of another other embodiment of the present invention.Now, oil separating mechanism 90 respectively arranges one respectively on the partition wall 54B of upper support member 54 and partition wall 54C, establish altogether two (90A, 90B), the importing path 99 be communicated with the refrigeration agent introduction part 95 of first and second oily separating mechanism 90A, 90B is communicated with the discharge anechoic chamber 62 (62A) of expulsion valve 72 side respectively, and the refrigeration agent leading-out portion 97 of first and second oily separating mechanism 90A, 90B is communicated with the discharge anechoic chamber 62 (62B) of drain passageway 70 side respectively.
Namely, in this embodiment, upper support member 54 is configured with two oily separating mechanisms 90 (90A, 90B), and refrigerant gas separately flows in these oily separating mechanisms (being connected in parallel).Thus, be discharged to the refrigerant gas of discharging in anechoic chamber 62 (62A) from expulsion valve 72 and be divided into two-way, one tunnel is after the first oily separating mechanism 90 (90A) is by oily centrifugation, another road the second oily separating mechanism 90 (90B) will by centrifugation after, collaborate in the discharge anechoic chamber 62 (62B) of drain passageway 70 side, final arrival drain passageway 70.
According to this structure, contact compared with situation about connecting like that with above-described embodiment, flow path resistance can be suppressed to cause the pressure loss to increase, simultaneously with form the situation of oily separating mechanism at a place compared with, effectively the oil be mixed in refrigeration agent can be separated, and reduce the discharge of the oil flowed out to seal container 12 outside.And, in this embodiment, although form oily separating mechanism 90 at two places and refrigerant gas respectively in their inner separately flowings, be not limited thereto, also oily separating mechanism can be formed in more than three places and refrigeration agent is shunted in each oily separating mechanism 90.
Although apply the present invention to the vertical rotary compressor of so-called bosom die mould multistage (two-stage) compression type in the above-described embodiments, but be not limited thereto, the present invention also can be applicable to the multiple compression rotary compressor of so-called single-stage or more than three grades well, especially, as long as the present invention is applied to be discharged to and discharges in compressor that refrigeration agent in anechoic chamber discharges directly to outside in seal container, the present invention will be very effective.
In addition, in embodiments, make the oil after being separated by oily separating mechanism 90, be back to by pore 98 in the oily memory section 13 in seal container 12, but be not limited thereto, the slide part etc. of rotation/compression mechanism section 18 can certainly be back to.
Claims (8)
1. a rotary compressor, consists of and in seal container, to receive electrodynamic element and by the shaft-driven rotation/compression mechanism section of the rotation of this electrodynamic element, it is characterized in that,
Described rotation/compression mechanism section has:
Cylinder, it has the pressing chamber at internal compression refrigeration agent;
Packaged unit, it is closed described pressing chamber and has discharge chamber, and the refrigeration agent in this cylinder after compression is discharged to this discharge chamber;
Also have oil separating device, this oil separating device is formed on this packaged unit, carries out centrifugation to the oil be discharged in the refrigeration agent of described discharge chamber.
2. rotary compressor according to claim 1, is characterized in that, has:
Expulsion valve, it is configured in described discharge chamber;
Refrigerant discharge leader, it is connected with described seal container;
Drain passageway, it is formed on described packaged unit, described discharge chamber is communicated with described refrigerant discharge leader, for just externally being discharged without described seal container is inner by the refrigeration agent being discharged to described discharge chamber;
Described oil separating device is formed with the form be located between described expulsion valve and described drain passageway.
3. rotary compressor according to claim 2, is characterized in that,
Described rotation/compression mechanism section has the first and second rotary compression elements, the refrigeration agent compressed by described first rotary compression element is discharged to described seal container inside, to the refrigeration agent of this seal container inside be discharged at the described cylinder compression forming described second rotary compression element, and discharge to described discharge chamber.
4. the rotary compressor according to any one in claims 1 to 3, is characterized in that,
Described oil separating device has:
Cylindric space portion, it is formed on described packaged unit, and the central shaft of this space portion is set to above-below direction;
Refrigeration agent introduction part, it is for importing this space portion by refrigeration agent;
Refrigeration agent leading-out portion, its central shaft being positioned at described space portion enters this space portion from top, and the lower end of this refrigeration agent leading-out portion is at this space portion inner opening;
Oil outflow portion, it is communicated with the lower end of described space portion;
Described space portion is towards the tapered shape of described oily outflow portion,
Flow into the refrigeration agent in described space portion from described refrigeration agent introduction part to rotate while decline along the inner peripheral surface of this space portion, and flow into the opening of described refrigeration agent leading-out portion, and isolated oil flows to described oily outflow portion from described refrigeration agent.
5. the rotary compressor according to any one in claims 1 to 3, is characterized in that,
Described packaged unit forms multiple described oil separating device, each described oil separating device is connected in series.
6. rotary compressor according to claim 4, is characterized in that,
Described packaged unit forms multiple described oil separating device, each described oil separating device is connected in series.
7. the rotary compressor according to any one in claims 1 to 3, is characterized in that,
Described packaged unit forms multiple described oil separating device, and refrigeration agent is to each described oil separating device shunting.
8. rotary compressor according to claim 4, is characterized in that,
Described packaged unit forms multiple described oil separating device, and refrigeration agent is to each described oil separating device shunting.
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| CN201110418067.3A CN103089627B (en) | 2011-11-07 | 2011-11-07 | Rotary compressor |
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| CN201110418067.3A CN103089627B (en) | 2011-11-07 | 2011-11-07 | Rotary compressor |
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| CN103089627B true CN103089627B (en) | 2015-08-12 |
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