CN206004428U - A kind of outer rotor refrigeration compressor - Google Patents
A kind of outer rotor refrigeration compressor Download PDFInfo
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- CN206004428U CN206004428U CN201620962370.8U CN201620962370U CN206004428U CN 206004428 U CN206004428 U CN 206004428U CN 201620962370 U CN201620962370 U CN 201620962370U CN 206004428 U CN206004428 U CN 206004428U
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- bent axle
- stator
- refrigeration compressor
- outer rotor
- rotor
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Abstract
This utility model provides a kind of outer rotor refrigeration compressor, is related to technical field of refrigeration compressors.This outer rotor refrigeration compressor includes rotor, stator and bent axle；Stator is fixedly connected on the lateral wall of the spindle hole of bent axle, and rotor is arranged on outside stator, connects the main shaft of bent axle.Wherein, rotor is made up of shell, base, lamination and multiple magnetic pole；Shell is fixedly connected on base, and multiple magnetic poles are provided at circumferentially spaced along shell, and lamination is arranged between shell and magnetic pole, and the inwall of lamination is radially provided with multiple projections, to install magnetic pole.Whole outer rotor refrigerating compressor structure is simple, easy to use, solves that in existing outer rotor refrigeration compressor, startability is poor, and Energy Efficiency Ratio is little, and consumptive material is many, high cost, can not meet the problem of people's current demand simultaneously.
Description
Technical field
This utility model is related to technical field of refrigeration compressors, more particularly, to a kind of outer rotor refrigeration compressor.
Background technology
Refrigeration compressor is the core energy-consuming parts of refrigeration system, refrigeration system excellent be by the ability of compressor Lai
Embody, the most direct effective means improving refrigerant system efficiency is to improve the efficiency of compressor.Refrigeration compressor is applied very
Extensively, such as refrigerator, refrigerator-freezer, fresh-keeping, air-conditioning etc..For refrigeration compressor, motor is requisite.Motor can be by electricity
Mechanical energy can be converted into, external rotor electric machine and inner rotor motor can be divided into according to its rotor and stator mounting means.
But inner rotor motor can take in identical relative to external rotor electric machine, it is little, to motor that inner rotor motor obtains moment of torsion
Startability cause to significantly affect.By this inner rotor motor using in refrigeration compressor, not only make refrigerant compression function
Effect ratio reduces, and also can increase consumptive material, improves production cost.In addition, when needing big volume utilization space, refrigeration compressor used
Build larger；If using mini-type refrigeration compressor, its utilization space can reduce again, highly inconvenient in actual applications.
Utility model content
The purpose of this utility model is to provide a kind of outer rotor refrigeration compressor, to solve outer rotor of the prior art
Not only startability is poor for refrigeration compressor, and Energy Efficiency Ratio is little, and consumptive material is many, high cost, can not meet people's reality need simultaneously
The problem asked.
To achieve these goals, this utility model employs the following technical solutions：
A kind of outer rotor refrigeration compressor that this utility model provides, including rotor, stator and bent axle；Described stator is fixed
It is connected to the lateral wall of the spindle hole of described bent axle；Described rotor is arranged at the outside of described stator, connects the master of described bent axle
Axle；Described rotor includes shell, base, lamination and multiple magnetic pole；Described shell is fixedly connected with described base；Multiple described magnetic
Pole is provided at circumferentially spaced along described shell；Described lamination is arranged between described shell and described magnetic pole, and described lamination is interior
It is raised that wall is radially provided with multiple first.
Further, described base center is provided with first through hole, and is provided with along described on the upside of described first through hole
The annular boss at first through hole edge.The having technical effect that of this technical scheme：First through hole can be used for connecting tumbler；Ring
The boss of shape increases the contact area of rotor and tumbler, not only makes connection more firm, and protects rotor.
Further, described stator inner wall is provided with symmetrical two second projection；Corresponding, the spindle hole of described bent axle
Outer wall is provided with symmetrical two second groove.The having technical effect that of this technical scheme：The projection of stator inner wall and bent axle
Fit depressions on spindle hole outer wall form bonded, in order to by outside non-rotatable for the stator spindle hole being fixed on bent axle
Wall, realizes the static effect of stator.
Further, also include protective case；Described protective case is arranged at the outer wall of described stator, and described protective case inwall sets
It is equipped with symmetrical two the 3rd raised；Corresponding, described stator outer wall is provided with symmetrical two the 3rd groove.This technical scheme
Have technical effect that：Protective case protects stator not destroyed by extraneous factor.Be arranged at simultaneously the projection of protective case inwall with
Be arranged at stator outer wall groove work in coordination formation bonded, for being fixed on stator by non-rotatable for protective case, with
Realize the protective effect to stator.
Further, also include limit element；Described limit element is connected to the lateral wall of the spindle hole of described bent axle, and position
In described stator away from described bent axle one end.The having technical effect that of this technical scheme：Limit element is in order to limit stator
Along the displacement perpendicular to crankshaft direction.
Further, also include spiral oiling device；Described spiral oiling device is arranged at below the main shaft of described bent axle, uses
With delivering oil.The having technical effect that of this technical scheme：Spiral oiling device is in order to convey lubricating oil into compressor.
Further, described spiral oiling device includes guiding in screw rod and bushing, and the main shaft of described bent axle and is provided with
Cylindrical cavity；Described bushing is located in described cavity, and is socketed described guiding screw rod.The technique effect of this technical scheme exists
In：Guiding screw rod is in order to delivering oil.Bushing is a kind of ring set playing liner effect, not only improves the mill between part
Damage, and it is easy to process, readily replaceable, reduce cost.Meanwhile, bushing also has certain guide function.
Further, described guiding screw rod is away from opening up a threaded hole of steel at one end end of described bent axle.This technical side
The having technical effect that of case：Guiding screw rod opens up threaded hole of steel away from one section of end of bent axle, in order to through steel wire, to be directed to spiral shell
Swing arm is fixed at oil storage.Worked in coordination fixing spiral oiling device using threaded hole of steel and steel wire, it is simple, convenient not only to connect,
And easily install, dismantle.
Further, described base edge is provided with oil return apparatus around the position of described first through hole.The skill of this technical scheme
Art effect is：Oil return apparatus enable the lubricating oil of compressor to be back to rapidly at oil storage.
Further, piston and connecting rod are also included；Described bent axle connects described connecting rod, drives described piston by described connecting rod
Motion.The having technical effect that of this technical scheme：Crank rotation drivening rod, connecting rod drives piston to move back and forth.Piston
Bear is gas pressure.
The beneficial effects of the utility model are：This outer rotor refrigeration compressor mainly includes rotor, stator and bent axle；Fixed
Son is fixedly connected on the lateral wall of the spindle hole of bent axle, and rotor is arranged on outside stator, connects the main shaft of bent axle.Wherein, rotor
It is made up of shell, base, lamination and multiple magnetic pole；Shell is fixedly connected and base, and multiple magnetic poles are provided at circumferentially spaced along shell,
Lamination is arranged between shell and magnetic pole, and the inwall of lamination is radially provided with multiple first projections, to install magnetic
Pole.Whole outer rotor refrigerating compressor structure is simple, easy to use, using rotor external so that electrode obtains bigger moment of torsion,
Not only increase the startability of compressor, and improve the Energy Efficiency Ratio of compressor, decrease consumptive material simultaneously, reduce production
Cost.In addition, this outer rotor refrigeration compressor improves the limit in same efficiency and utilization space, to compressor body size
System, meets the current demand of people.
Brief description
In order to be illustrated more clearly that this utility model specific embodiment or technical scheme of the prior art, below will be right
In specific embodiment or description of the prior art, the accompanying drawing of required use is briefly described.It should be evident that describing below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
The front view of the outer rotor refrigeration compressor that Fig. 1 provides for this utility model；
The rotor structure schematic diagram of the outer rotor refrigeration compressor that Fig. 2 provides for this utility model；
The stator structure schematic diagram of the outer rotor refrigeration compressor that Fig. 3 provides for this utility model；
The structural representation of the stator that Fig. 4 provides for this utility model and protective case.
Reference：
10- rotor；20- stator；30- bent axle；
40- protective case；50- limit element；60- spiral oiling device；
70- piston；80- connecting rod；
101- shell；102- base；103- lamination；
104- magnetic pole；
201- second is raised；202- the 3rd groove；203- machine winding；
301- main shaft；302- crankcase；
401- the 3rd is raised；
601- guides screw rod；602- bushing；
1021- first through hole；1022- annular boss；1023- second through hole；
1031- first is raised；
3011- spindle hole；3012- second groove；
6011- threaded hole of steel.
Specific embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is clearly and completely described it is clear that described
Embodiment is a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment in this utility model, this
The every other embodiment that field those of ordinary skill is obtained under the premise of not making creative work, broadly falls into this practicality
Novel protected scope.
In description of the present utility model, " " center ", " on ", D score, "left", "right", " perpendicular it should be noted that term
Directly ", the orientation of instruction such as " level ", " interior ", " outward " or position relationship are based on orientation shown in the drawings or position relationship, are only
For the ease of description this utility model with simplify description, rather than instruction or the hint device of indication or element must have specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or hint relative importance.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " being connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or integratedly
Connect；Can be to be mechanically connected or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning in this utility model for the language.
Present embodiments provide a kind of outer rotor refrigeration compressor, wherein：The outer rotor system that Fig. 1 provides for this utility model
The front view of cold compressor；The rotor structure schematic diagram of the outer rotor refrigeration compressor that Fig. 2 provides for this utility model；Fig. 3 is
The stator structure schematic diagram of the outer rotor refrigeration compressor that this utility model provides；The stator that Fig. 4 provides for this utility model with
The structural representation of protective case.As shown in figures 1-4, the primary structure of outer rotor refrigeration compressor includes rotor 10, stator 20 and
Bent axle 30.Specifically, stator 20 is fixedly connected on the lateral wall of the spindle hole 3011 of bent axle 30；Rotor 10 is arranged at stator 20
Outside, connects the main shaft 301 of bent axle 30；Rotor 10 includes shell 101, base 102, lamination 103 and multiple magnetic pole 104；Shell
101 are fixedly connected with base 102；Multiple magnetic poles 104 are provided at circumferentially spaced along shell 101；Lamination 103 be arranged at shell 101 with
Between magnetic pole 104, and the inwall of lamination 103 is radially provided with multiple first projections 1031.
In the prior art, the motor of used outer rotor refrigeration compressor typically adopts inner rotor motor, internal rotor
The rotor that motor rotates is located inside stator.But, it turns out that inner rotor motor relative to external rotor electric machine in identical energy
Time-consuming, inner rotor motor acquisition moment of torsion is little, and the startability of motor is caused to significantly affect.By this inner rotor motor using in system
During cold compressor, not only cause refrigeration compressor Energy Efficiency Ratio little, and increased consumptive material, and then increased production cost.In addition,
In use, if desired high efficiency, the compressor of big volume when, the universal build of used compressor is larger；If desired
During light duty compressor, the requirement to efficiency and space utilization can not be met again.
Outer rotor refrigeration compressor in the present embodiment mainly includes rotor 10, stator 20 and bent axle 30；Stator 20 is solid
Surely it is connected to the lateral wall of the spindle hole 3011 of bent axle 30, rotor 10 is arranged on outside stator 20, connect the main shaft of bent axle 30
301.Wherein, rotor 10 is made up of shell 101, base 102, lamination 103 and multiple magnetic pole 104；Shell 101 is fixedly connected on bottom
Seat 102, multiple magnetic poles 104 are provided at circumferentially spaced along shell 101, and lamination 103 is arranged between shell 101 and magnetic pole 104, and
The inwall of lamination 103 is radially provided with multiple first projections 1031, to install magnetic pole 104.This outer rotor refrigerant compression
Machine utilizes rotor 10 external so that motor obtains bigger moment of torsion, not only increases the startability of compressor, and improves
The Energy Efficiency Ratio of compressor, decreases consumptive material simultaneously, reduces production cost.In addition, in the shell 101 of rotor 10 and magnetic pole 104
Between increase lamination 103 it is therefore prevented that the loss to electric energy for the current vortex, enhance the magnetic flux density between two magnetic poles 104 simultaneously.Carry
The rotor 10 of lamination 103 not only increases electric efficiency, and so that the build of motor in identical refrigerator utilization space
Can make is less, thus reducing the overall height of refrigeration compressor.
Wherein, outer rotor 10 is overall is made up of the mode of aluminum die casting, and its lamination 103 is then the silicon respond well using magnetic conduction
Steel disc is made.Meanwhile, make the shell 101 of rotor 10 closely coupled with lamination 103 using the method for die casting.It should be noted that
Multiple first raised 1031 cross section triangularity settings, its summit connects lamination 103 inwall, its base and magnetic pole 104 inwall
Concordantly, and cut away an angle away from magnetic pole 104 for fritter first projection 1031.Raised by similar swallow-tailed first
1031, magnetic pole 104 is bumped into successively.
In the alternative of the present embodiment, as shown in Fig. 1～2, further, base 102 center is provided with
One through hole 1021, and on the upside of first through hole 1021, it is provided with the annular boss 1022 along first through hole 1021 edge.In this enforcement
In example, first through hole 1021 is arranged at the center of base 102, in order to connect tumbler.For example, when tumbler is bent axle 30
When, the main shaft 301 of bent axle 30 passes through first through hole 1021, and rotor 10 is fixedly connected on the main shaft 301 of bent axle 30.First
The upper end-face edge of through hole 1021 arranges an annular boss 1022 along first through hole 1021.So, not only increase first to lead to
Hole 1021 and the contact area of main shaft 301, and make both connections more firm, stable.Meanwhile, larger contact surface is protected
Demonstrate,prove safety in rotation for the rotor 10, improve rotor 10 base 102 causing because contact surface is little, velocity of rotation fast
Damage.
In the alternative of the present embodiment, as shown in figures 1-4, further, stator 20 inwall is provided with symmetrical two
Individual second projection 201；Corresponding, the outer wall of the spindle hole 3011 of bent axle 30 is provided with symmetrical two the second groove 3012.Tool
Body, the direction along stator 20 axis is provided with multiple offline wire casings, is provided with machine winding 203 in this wire casing.Stator
On 20 inwalls second raised 201 is bonded with the second groove 3012 formation of working in coordination on spindle hole 3011 outer wall of bent axle 30
Connect.In the present embodiment, by second on spindle hole 3011 outer wall of second on stator 20 inwall raised 201 and bent axle 30
It is bonded that groove 3012 coordinates, and the outer wall of non-rotatable for stator 20 spindle hole 3011 being fixed on bent axle 30 is realized
The static effect of stator 20.It should be noted that in processing projection or groove, its machining accuracy of reduction that can be relative, more
Be conducive to the production assembling of stator 20 and spindle hole 3011.
In the alternative of the present embodiment, as shown in figures 1-4, further, also include protective case 40；Protective case 40
It is arranged at the outer wall of stator 20, and protective case 40 inwall is provided with symmetrical two the 3rd projection 401；Corresponding, outside stator 20
Wall is provided with symmetrical two the 3rd groove 202.Specifically, protective case 40 is made of plastics.Protective case 40 is assemblied in spindle hole
3011 cylindrical on, be connected to the outer wall of stator 20.In the present embodiment, protective case 40 forms the outer of a parcel stator 20
Shell, protects stator 20 from the destruction of extraneous factor, such as friction between the pollution of fluid and rotor 10.Arrange simultaneously
It is bonded in the 3rd projection 401 and the 3rd groove 202 the being arranged at stator 20 outer wall formation of working in coordination of protective case 40 inwall,
For being fixed on stator 20 by non-rotatable for protective case 40, to realize the protective effect to stator 20.It should be noted that
In processing projection or groove, its machining accuracy of reduction that can be relative, it is more beneficial for the production dress of stator 20 or protective case 40
Join.
In the alternative of the present embodiment, as shown in figure 1, further, also include limit element 50；Limit element 50
It is connected to the lateral wall of the spindle hole 3011 of bent axle 30, and be located at stator 20 one end away from bent axle 30.Specifically, limit element
50 is axle card.In the present embodiment, spindle hole 3011 cylindrical on open up two little grooves, axle card is connected to spindle hole
3011 cylindrical, as stator 20 along the limit element 50 of the cylindrical vertical direction of crankshaft hole 3011, limit stator 20 along vertical
Displacement in bent axle 30 direction.
In the alternative of the present embodiment, as shown in figure 1, further, also include spiral oiling device 60；On spiral
Oily device 60 is arranged at below the main shaft 301 of bent axle 30, in order to delivering oil.In the present embodiment, when bent axle 30 operates, pressure
The lubricating oil of contracting machine housing bottom can enter in the lubricating system of compressor along spiral oiling device 60.
In the alternative of the present embodiment, as shown in figure 1, further, spiral oiling device 60 includes guiding spiral
It is provided with cylindrical cavity in bar 601 and bushing 602, and the main shaft 301 of bent axle 30；Bushing 602 is located in cavity, and socket is led
To screw rod 601.Specifically, an oil guide groove is provided with bushing 602, by guiding screw rod 601 delivering oil, passes through
Oil guide groove on bushing 602, enters the lubricating system of compressor.Bushing 602 is socketed in outside and the main shaft of guiding screw rod 601
Between 301 cavity.In the present embodiment, bushing 602 is a kind of ring set playing liner effect, in order to improve between part
Abrasion.In motion, cause the abrasion of moving component because of long-term friction, such as when axle is worn and torn to a certain extent with hole
When it is necessary to renewal part.Therefore, it can to arrange that hardness is relatively low herein, the preferable part of wearability as bushing 602,
Abrasion to guiding screw rod 601 and main shaft 301 endoporus is reduced with this, and then saves cost of manufacture.And, even if in work
During, bushing 602 herein is worn, and also only needs more resleeve 602.In addition, bushing 602 also has certain guiding to make
With bushing 602 here offers oil guide groove, in order to guide fluid.
In the alternative of the present embodiment, as shown in Fig. 1～2, further, guiding screw rod 601 is away from bent axle 30
One end end at open up a threaded hole of steel 6011.Specifically, threaded hole of steel 6011 is in order to through steel wire, to be directed to screw rod 601
It is fixed at oil storage.In the present embodiment, guiding screw rod 601 opens up a threaded hole of steel away from one section of end of bent axle 30
6011, pass through this hole using steel wire, be directed to screw rod 601 and be fixed at oil storage.Mutually matched by threaded hole of steel 6011 and steel wire
Close and fix spiral oiling device 60, it is simple, convenient not only to connect, and easily installs, dismantles.
In the alternative of the present embodiment, as shown in figure 1, further, base 102 is along around first through hole 1021
Position is provided with oil return apparatus.Specifically, oil return apparatus are set to multiple second through holes 1023.In the present embodiment, Duo Ge
Two through holes 1023 make the lubricating oil of lubrication compressor be back to rapidly at oil storage, reduce lubricating oil in rotor 10 base 102 or
It is the accumulation within compressor.Not only ensure that the good lubricant effect of compressor, and decrease the waste of lubricating oil.Separately
Outward, the second through hole 1023 also plays certain thermolysis.
In the alternative of the present embodiment, as shown in figure 1, further, also include piston 70 and connecting rod 80；Bent axle 30
Connect connecting rod 80, drive piston 70 to move by connecting rod 80.In the present embodiment, bent axle 30 is positioned in crankcase 302, bent axle
30 rotation drivening rods 80, connecting rod 80 drives piston 70 to move back and forth, and then realizes compression.Wherein, piston 70 bears
It is gas pressure.
Finally it should be noted that：Various embodiments above is only in order to illustrating the technical solution of the utility model, rather than it is limited
System；Although being described in detail to this utility model with reference to foregoing embodiments, those of ordinary skill in the art should
Understand：It still can be modified to the technical scheme described in foregoing embodiments, or to wherein some or all of
Technical characteristic carries out equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from this practicality new
The scope of type each embodiment technical scheme.
Claims (10)
1. a kind of outer rotor refrigeration compressor is it is characterised in that include rotor, stator and bent axle；
Described stator is fixedly connected on the lateral wall of the spindle hole of described bent axle；Described rotor is arranged at the outside of described stator,
Connect the main shaft of described bent axle；
Described rotor includes shell, base, lamination and multiple magnetic pole；
Described shell is fixedly connected with described base；Multiple described magnetic poles are provided at circumferentially spaced along described shell；Described lamination sets
It is placed between described shell and described magnetic pole, and the inwall of described lamination is radially provided with multiple first projections.
2. outer rotor refrigeration compressor according to claim 1 is it is characterised in that described base center is provided with
It is provided with the annular boss along described first through hole edge on the upside of one through hole, and described first through hole.
3. outer rotor refrigeration compressor according to claim 2 it is characterised in that described stator inner wall be provided with symmetrical
Two second raised；Corresponding, the outer wall of the spindle hole of described bent axle is provided with symmetrical two second groove.
4. outer rotor refrigeration compressor according to claim 3 is it is characterised in that also include protective case；Described protective case
It is arranged at the outer wall of described stator, and described protective case inwall is provided with symmetrical two the 3rd projection；Corresponding, described stator
Outer wall is provided with symmetrical two the 3rd groove.
5. outer rotor refrigeration compressor according to claim 2 is it is characterised in that also include limit element；Described spacing
Element is connected to the lateral wall of the spindle hole of described bent axle, and is located at described stator one end away from described bent axle.
6. the outer rotor refrigeration compressor according to any one of claim 2～5 oils it is characterised in that also including spiral
Device；Described spiral oiling device is arranged at below the main shaft of described bent axle, in order to delivering oil.
7. outer rotor refrigeration compressor according to claim 6 is it is characterised in that described spiral oiling device includes guiding
It is provided with cylindrical cavity in screw rod and bushing, and the main shaft of described bent axle；Described bushing is located in described cavity, and is socketed
Described guiding screw rod.
8. outer rotor refrigeration compressor according to claim 7 is it is characterised in that described guiding screw rod is away from described song
A threaded hole of steel is opened up at one end end of axle.
9. outer rotor refrigeration compressor according to claim 6 is it is characterised in that described base leads to along around described first
The position in hole is provided with oil return apparatus.
10. outer rotor refrigeration compressor according to claim 9 is it is characterised in that also include piston and connecting rod；
Described bent axle connects described connecting rod, drives described piston movement by described connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620962370.8U CN206004428U (en) | 2016-08-26 | 2016-08-26 | A kind of outer rotor refrigeration compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620962370.8U CN206004428U (en) | 2016-08-26 | 2016-08-26 | A kind of outer rotor refrigeration compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206004428U true CN206004428U (en) | 2017-03-08 |
Family
ID=58197618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620962370.8U Expired - Fee Related CN206004428U (en) | 2016-08-26 | 2016-08-26 | A kind of outer rotor refrigeration compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206004428U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107542667A (en) * | 2017-10-16 | 2018-01-05 | 瑞智(青岛)精密机电有限公司 | A kind of external-rotor-type high energy efficiency, the Rotary Compressor of low noise |
-
2016
- 2016-08-26 CN CN201620962370.8U patent/CN206004428U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107542667A (en) * | 2017-10-16 | 2018-01-05 | 瑞智(青岛)精密机电有限公司 | A kind of external-rotor-type high energy efficiency, the Rotary Compressor of low noise |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170308 Termination date: 20200826 |