CN207212924U - Parts of bearings and there is its compressor, refrigerating plant - Google Patents
Parts of bearings and there is its compressor, refrigerating plant Download PDFInfo
- Publication number
- CN207212924U CN207212924U CN201721291443.6U CN201721291443U CN207212924U CN 207212924 U CN207212924 U CN 207212924U CN 201721291443 U CN201721291443 U CN 201721291443U CN 207212924 U CN207212924 U CN 207212924U
- Authority
- CN
- China
- Prior art keywords
- bearing
- parts
- bearings
- exhaust
- exhaust partition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Compressor (AREA)
- Rotary Pumps (AREA)
Abstract
The utility model discloses a kind of parts of bearings and there is its compressor, refrigerating plant.Parts of bearings is provided with installation through-hole, and parts of bearings includes：Bearing；Exhaust partition, the exhaust partition is located on the end face of the bearing, the installation through-hole runs through the bearing and the exhaust partition, the exhaust partition is provided with the delivery valve seat for being used for placing air bleeding valve, the delivery valve seat is provided with runs through its exhaust outlet, the exhaust partition and the bearing fit to limit the exhaust passage being connected with the delivery valve seat in a thickness direction.According to the parts of bearings of the utility model embodiment, bearing will not deflect when bearing bent axle radial load, motor stator and rotor clearance inequality will not be caused to cause gap sound, also will not cause the gap change at the delivery valve seat and caused by piston and the prooving of valve seat, bearing by the frictional force of piston, will not extend the service life of bearing.
Description
Technical field
Compressor field is the utility model is related to, more particularly, to a kind of parts of bearings and there is its compressor, refrigeration
Device.
Background technology
The bearing arrangement of the rotary compressor of correlation technique typically offers delivery valve seat, steam vent etc. on bearing.
Assembling exhaust valve plate, lift stopper etc. in delivery valve seat, because delivery valve seat is thin in the presence of causing bearing rigidity to be here present
The problem of weak, exhaust cross gap volume is caused to increase if thickening, it is thinned then cause valve seat deformation to aggravate, bearing face and piston
Abrasion, power consumption increase and reliability decrease, bearing deflect when bearing bent axle radial load to weakness direction, and rotor is encountered
Stator, produce compressor clearance sound.
Utility model content
The utility model is intended at least solve one of technical problem present in prior art.
Therefore, the utility model proposes a kind of parts of bearings, bearing will not deflect when bearing bent axle radial load, row
Air valve seat change it is thin will not also cause delivery valve seat to deform, delivery valve seat change it is thin after can reduce steam vent clearance volume, improve pressure
The performance of contracting machine.
The utility model also proposes a kind of compressor with above-mentioned parts of bearings.
The utility model proposes a kind of refrigerating plant with above-mentioned compressor again.
According to the parts of bearings of the utility model embodiment, the parts of bearings is provided with installation through-hole, the parts of bearings
Including：Bearing, the bearing is interior to be provided with the first installation endoporus；Exhaust partition, the exhaust partition are located at the end face of the bearing
On, the installation through-hole runs through the bearing and the exhaust partition, and the exhaust partition, which is provided with, to be used to place air bleeding valve
Delivery valve seat, the delivery valve seat is provided with runs through its exhaust outlet, the exhaust partition and the bearing in a thickness direction
Coordinate to limit the exhaust passage being connected with the delivery valve seat.
According to the parts of bearings of the utility model embodiment, because the rigid phase on the circumferencial direction of bearing is worked as, bearing exists
It will not be deflected when bearing bent axle radial load, so as to which motor stator and rotor clearance inequality will not be caused to cause gap sound,
Will not cause the gap change at the delivery valve seat and caused by piston and the prooving of valve seat.Simultaneously because the row of being provided between bearing and cylinder
Air bound plate, therefore bearing by the frictional force of piston, will not extend the service life of bearing.
In some embodiments of the utility model, the exhaust passage is extended on the periphery wall of the exhaust partition.
In some embodiments of the utility model, the end face toward each other of the bearing and the exhaust partition is provided with
Groove, two grooves coordinate to limit the exhaust passage, and the groove on the exhaust partition extends to the exhaust
On the periphery wall of dividing plate.
In some embodiments of the utility model, the bearing includes outer cover part, and the outer cover part is that tensile strength is small
It is more than 2g/m in 250Mpa and density3Material pieces.
Alternatively, the outer cover part is aluminum component or Al-alloy parts.
Further, the bearing also includes axle sleeve, and the axle sleeve is located in the outer cover part.
In some embodiments of the utility model, the installation through-hole is included in the first installation in the bearing
Hole and the second installation endoporus in the exhaust partition, the aperture of the second installation endoporus are more than in the described first installation
The aperture in hole.
According to the compressor of the utility model embodiment, including：Cylinder, the cylinder is interior to be provided with cylinder chamber and vane slot；
Parts of bearings, the parts of bearings are located at least side of the cylinder, and the parts of bearings is above-mentioned according to the utility model
The parts of bearings of embodiment, the exhaust partition are located on the cylinder.
According to the compressor of the utility model embodiment, by setting above-mentioned parts of bearings, due to the circumference side of bearing
Upward rigid phase is worked as, and bearing will not deflect when bearing bent axle radial load, so as to cause motor stator and rotor
Gap inequality causes gap sound, will not also cause the gap change at the delivery valve seat and caused by piston and the prooving of valve seat.While by
Exhaust partition is provided between bearing and cylinder, therefore bearing by the frictional force of piston, will not extend the service life of bearing.
Simultaneously because exhaust partition is not subject to bent axle radial load, delivery valve seat change it is thin will not also cause delivery valve seat to deform, delivery valve seat
Change it is thin after can reduce steam vent clearance volume, improve the performance of compressor.
Specifically, the exhaust passage extends to the periphery wall of the exhaust partition along the direction away from the vane slot
On.
According to the refrigerating plant of the utility model embodiment, including the compression according to the utility model above-described embodiment
Machine.
Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description
In become obvious, or by it is of the present utility model practice recognize.
Brief description of the drawings
Of the present utility model above-mentioned and/or additional aspect and advantage will in the description from combination accompanying drawings below to embodiment
Become obvious and be readily appreciated that, wherein：
Fig. 1 is the profile according to the parts of bearings of the utility model embodiment；
Fig. 2 is the top view according to the exhaust partition provided with air bleeding valve of the utility model embodiment；
Fig. 3 is the profile in A-A directions in Fig. 2；
Fig. 4 is the upward view according to the bearing of the utility model embodiment；
Fig. 5 is the schematic diagram of the compression mechanical part in the compressor according to the utility model embodiment；
Fig. 6 is the profile of the compression mechanical part shown in Fig. 5.
Reference：
Parts of bearings 100,
Bearing 1, first install endoporus 10, outer cover part 11, axle sleeve 12,
Exhaust partition 2, second install endoporus 20, delivery valve seat 21, exhaust outlet 22,
Exhaust passage 3, the first groove 30, the second groove 31,
Compressor 1000, cylinder 300, bent axle 400,
Air bleeding valve 200, valve block 5, rivet 6, lift stopper 7.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model
Limitation.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " axle
To ", " radial direction ", the orientation of the instruction such as " circumference " or position relationship be based on orientation shown in the drawings or position relationship, be only for
Be easy to describe the utility model and simplify to describe, rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, define " the
One ", one or more this feature can be expressed or be implicitly included to the feature of " second ".In description of the present utility model
In, unless otherwise indicated, " multiple " are meant that two or more.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected 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 of the language in the utility model.
Parts of bearings 100 below with reference to Fig. 1-Fig. 6 descriptions according to the utility model embodiment, wherein parts of bearings 100
It can apply to support bent axle 400 in compressor 1000, compressor 1000 includes the elements such as compression mechanical part and motor, compression
Mechanism part includes the element such as cylinder 300, piston and bent axle 400, and the piston provided with eccentric rotary to refrigerant to carry out in cylinder 300
Compression, motor include stator and rotor, and rotor is fixed on bent axle 400.
As Figure 1-Figure 4, according to the parts of bearings 100 of the utility model embodiment, it is logical that parts of bearings 100 is provided with installation
Hole, parts of bearings 100 include：Bearing 1 and exhaust partition 2, installation through-hole run through bearing 1 and exhaust partition 2, bent axle 400 and peace
Through hole is filled to coordinate.Specifically, installation through-hole includes the first installation installation endoporus 20 of endoporus 10 and second, and first is provided with bearing 1
Endoporus 10 is installed.Exhaust partition 2 is located on the end face of bearing 1, and exhaust partition 2 is provided with second with the first installation face of endoporus 10
Endoporus 20 is installed, when parts of bearings 100 is used to support bent axle 400, bent axle 400 is installed through the first installation endoporus 10 and second
Endoporus 20, exhaust partition 2 are located on cylinder 300.
Preferably, the aperture of the second installation endoporus 20 is more than the aperture of the first installation endoporus 10, that is to say, that bearing 1 can
To slidably support bent axle 400, exhaust partition 2 coordinates with the gap of bent axle 400, i.e., exhaust partition 2 is not subject to bent axle radial load.So as to
Because exhaust partition 2 is not subject to the radial load of bent axle 400, delivery valve seat 21 change it is thin also delivery valve seat 21 will not be caused to deform, be vented
Valve seat 21 change it is thin after can reduce the clearance volume of steam vent 22, improve the performance of compressor 1000.
Exhaust partition 2 is provided with the delivery valve seat 21 for being used for placing air bleeding valve 200, and delivery valve seat 21 is provided with thickness side
Its exhaust outlet 22 is extended upward through, exhaust partition 2 and bearing 1 coordinate to limit the exhaust passage 3 being connected with delivery valve seat 21.
Wherein air bleeding valve 200, which is arranged on delivery valve seat 21, is used to open or close exhaust outlet 22.When exhaust outlet 22 is opened, from cylinder
The refrigerant after overcompression of discharge is discharged from exhaust outlet 22 in 300, and discharges parts of bearings 100 by exhaust passage 3.Wherein
It is understood that exhaust passage 3 can be limited jointly by exhaust partition 2 and bearing 1, exhaust passage 3 can also be only defined
On exhaust partition 2.
In specific example of the present utility model, air bleeding valve 200 includes valve block 5, rivet 6 and lift stopper 7, valve block 5
One end be fixed on by rivet 6 on exhaust partition 2, the other end of valve block 5 is with the face of exhaust outlet 22 to open or close exhaust
Mouthfuls 22, lift stopper 7 is located at the side of the remote exhaust outlet 22 of valve block 5 to limit the stroke of valve block 5.
According to the parts of bearings 100 of the utility model embodiment, because air bleeding valve 200 is located on exhaust partition 2, bearing 1
On be not provided with delivery valve seat 21, therefore the rigid phase on the circumferencial direction of bearing 1 is worked as, and bearing 1 is bearing the radial load of bent axle 400
Shi Buhui deflects, and so as to which motor stator and rotor clearance inequality will not be caused to cause gap sound, will not also cause because of exhaust
Gap changes and causes piston and the prooving of valve seat at valve seat 21.Simultaneously because exhaust partition 2 is provided between bearing 1 and cylinder 300,
Therefore bearing 1 by the frictional force of piston, will not extend the service life of bearing 1.
In some embodiments of the utility model, exhaust passage 3 is extended on the periphery wall of exhaust partition 2.So as to nothing
The through hole for running through bearing 1 on thickness need to be arranged on bearing 1, can further improve the rigidity of bearing 1, while can avoid
The refrigerant discharged from exhaust passage 3 is blowed in the oil sump in compressor.
Further, the end face toward each other of bearing 1 and exhaust partition 2 is provided with groove, and two grooves coordinate to limit
Exhaust passage 3, the groove on exhaust partition 2 are extended on the periphery wall of exhaust partition 2.Specifically, is set on bearing 1
One groove 30, the second groove 31 is set on exhaust partition 2, the first groove 30 and the second groove 31, which coordinate, limits exhaust passage 3,
Second groove 31 is extended on the periphery wall of exhaust partition 2, so as to ensure bearing 1 rigidity on the basis of, further
Increase the capacity of exhaust passage 3.
Because bearing 1 is not subject to the frictional force of piston, therefore in some embodiments of the utility model, bearing 1 includes
Outer cover part 11, outer cover part 11 are that tensile strength is less than 250Mpa and density is more than 2g/m3Material pieces, so as to reduce bearing
1 cost.Alternatively, outer cover part 11 is aluminum component or Al-alloy parts.
In order to ensure the wearability for solving between bearing 1 and bent axle 400, the abrasion of bearing 1 and bent axle 400 is reduced, is extended
The service life of bearing 1 and bent axle 400.Therefore further, bearing 1 also includes axle sleeve 12, and axle sleeve 12 is located in outer cover part 11,
Axle sleeve 12 limits the first installation endoporus 10.
Of course, it should be understood that when bearing 1 does not include axle sleeve 12, the diameter of the second installation endoporus 20 is more than the first peace
The diameter of dress endoporus 10 refers to that the internal diameter of outer cover part 11 is less than the diameter of the second installation endoporus 20.So as to work as parts of bearings 100
During for supporting bent axle 400, exhaust partition 2 coordinates with the gap of bent axle 400, and exhaust partition 2 is not subject to the radial load of bent axle 400, arranges
Air valve seat 21 change it is thin also delivery valve seat 21 will not be caused to deform, delivery valve seat 21 change it is thin after can reduce the clearance of steam vent 22 appearance
Product, improve the performance of compressor 1000.
According to the compressor 1000 of the utility model embodiment, including：Cylinder 300 and parts of bearings 100, in cylinder 300
Provided with cylinder chamber and vane slot.Parts of bearings 100 is located at least side of cylinder 300, and parts of bearings 100 is new according to this practicality
The parts of bearings 100 of type above-described embodiment, exhaust partition 2 are located on cylinder 300.It is understood that compressor 1000 also wraps
The parts such as housing, bent axle 400 are included, cylinder 300 and parts of bearings 100 are located in housing, and bent axle 400 is enclosed on outside parts of bearings 100
On, it is provided with oil sump in housing.
Specifically, when compressor 1000 is single cylinder compressor, the wherein side of cylinder 300 is provided with parts of bearings 100.When
Can be that the side of each cylinder 300 is provided with parts of bearings 100 or each when compressor 1000 is multicylinder compressor
The both sides of cylinder 300 are provided with parts of bearings 100.
According to the compressor 1000 of the utility model embodiment, by setting above-mentioned parts of bearings 100, due to bearing 1
Circumferencial direction on rigid phase work as, bearing 1 will not deflect when bearing 400 radial load of bent axle, so as to will not cause electricity
Machine stator and rotor clearance inequality cause gap sound, will not also cause the gap change at the delivery valve seat 21 and caused by piston and valve
Seat abrasion.Simultaneously because be provided with exhaust partition 2 between bearing 1 and cylinder 300, thus bearing 1 will not by the frictional force of piston,
Extend the service life of bearing 1.Simultaneously because exhaust partition 2 is not subject to the radial load of bent axle 400, delivery valve seat 21, which changes, thin also will not
Cause delivery valve seat 21 to deform, delivery valve seat 21 change it is thin after can reduce the clearance volume of steam vent 22, improve compressor 1000
Performance.
In some embodiments of the utility model, in order to avoid the gas discharged from exhaust passage 3 blows to oil sump, therefore
The outlet of exhaust passage 3 is remotely located from the direction of oil sump, such as the outlet of exhaust passage 3 can be arranged to prolong upward
Stretch.
In some specific examples of the present utility model, compressor 1000 is two-stage compressor, the one of first order cylinder 300
Side is provided with above-mentioned parts of bearings 100, and exhaust passage 3 is extended on the periphery wall of exhaust partition 2, by the refrigerant of the first second compression
It is drained into by exhaust passage 3 in second level cylinder 300 and carries out the second second compression.
In some embodiments of the utility model, exhaust passage 3 extends to exhaust partition 2 along the direction away from vane slot
Periphery wall on.Phenomena such as so as to avoid interfering with the set location of slide plate, ensure the reliability of compressor 1000.
According to other compositions of the compressor 1000 of the utility model embodiment such as contraction principle and operation for
All it is known for those of ordinary skill in the art, is not detailed herein.
According to the refrigerating plant of the utility model embodiment, including the compressor according to the utility model above-described embodiment
1000。
According to the refrigerating plant of the utility model embodiment, by setting above-mentioned compressor 1000, due to the circle of bearing 1
Rigid phase in circumferential direction is worked as, and bearing 1 will not deflect when bearing 400 radial load of bent axle, so as to motor be caused to determine
Son and rotor clearance inequality cause gap sound, will not also cause the gap change at the delivery valve seat 21 and caused by piston and valve seat mill
Damage.Simultaneously because exhaust partition 2 is provided between bearing 1 and cylinder 300, therefore bearing 1 will not be extended by the frictional force of piston
The service life of bearing 1.Simultaneously because exhaust partition 2 is not subject to the radial load of bent axle 400, delivery valve seat 21, which changes, thin will not also cause
Delivery valve seat 21 deforms, delivery valve seat 21 change it is thin after can reduce the clearance volume of steam vent 22, improve the performance of compressor 1000.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example describe
Structure, material or feature are contained at least one embodiment or example of the present utility model.In this manual, to above-mentioned art
The schematic representation of language is not necessarily referring to identical embodiment or example.Moreover, description specific features, structure, material or
Person's feature can combine in an appropriate manner in any one or more embodiments or example.
While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that：
These embodiments can be carried out with a variety of changes, modification in the case where not departing from principle and objective of the present utility model, replaced
And modification, the scope of the utility model are limited by claim and its equivalent.
Claims (10)
1. a kind of parts of bearings, it is characterised in that the parts of bearings is provided with installation through-hole, and the parts of bearings includes：
Bearing；
Exhaust partition, the exhaust partition are located on the end face of the bearing, and the installation through-hole is through the bearing and described
Exhaust partition, the exhaust partition are provided with the delivery valve seat for being used for placing air bleeding valve, and the delivery valve seat is provided with thickness
Side extends upward through its exhaust outlet, the exhaust partition and the bearing fit to limit the row being connected with the delivery valve seat
Gas passage.
2. parts of bearings according to claim 1, it is characterised in that the exhaust passage extends to the exhaust partition
On periphery wall.
3. parts of bearings according to claim 2, it is characterised in that the bearing and the exhaust partition are toward each other
End face be provided with groove, two grooves coordinate to limit the exhaust passage, the groove extension on the exhaust partition
To the periphery wall of the exhaust partition.
4. parts of bearings according to claim 1, it is characterised in that the bearing includes outer cover part, and the outer cover part is
Tensile strength is less than 250Mpa and density is more than 2g/m3Material pieces.
5. parts of bearings according to claim 4, it is characterised in that the outer cover part is aluminum component or Al-alloy parts.
6. parts of bearings according to claim 4, it is characterised in that the bearing also includes axle sleeve, and the axle sleeve is located at
In the outer cover part.
7. according to the parts of bearings any one of claim 1-6, it is characterised in that the installation through-hole includes being located at institute
State the first installation endoporus in bearing and the second installation endoporus in the exhaust partition, the hole of the second installation endoporus
Footpath is more than the aperture of the described first installation endoporus.
A kind of 8. compressor, it is characterised in that including：
Cylinder, the cylinder is interior to be provided with cylinder chamber and vane slot；
Parts of bearings, the parts of bearings are located at least side of the cylinder, and the parts of bearings is according to claim 1-7
Any one of parts of bearings, the exhaust partition is located on the cylinder.
9. compressor according to claim 8, it is characterised in that direction of the exhaust passage along the remote vane slot
Extend on the periphery wall of the exhaust partition.
10. a kind of refrigerating plant, it is characterised in that including the compressor according to any one of claim 8-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721291443.6U CN207212924U (en) | 2017-09-30 | 2017-09-30 | Parts of bearings and there is its compressor, refrigerating plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721291443.6U CN207212924U (en) | 2017-09-30 | 2017-09-30 | Parts of bearings and there is its compressor, refrigerating plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207212924U true CN207212924U (en) | 2018-04-10 |
Family
ID=61820769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721291443.6U Active CN207212924U (en) | 2017-09-30 | 2017-09-30 | Parts of bearings and there is its compressor, refrigerating plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207212924U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595251A (en) * | 2017-09-30 | 2019-04-09 | 广东美芝制冷设备有限公司 | Parts of bearings and compressor, refrigerating plant with it |
-
2017
- 2017-09-30 CN CN201721291443.6U patent/CN207212924U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595251A (en) * | 2017-09-30 | 2019-04-09 | 广东美芝制冷设备有限公司 | Parts of bearings and compressor, refrigerating plant with it |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105317678B (en) | Outer rotor rotary compressor | |
| CN103807174B (en) | A kind of three cylinder rolling rotor type compressors | |
| CN104963868A (en) | Rotary compressor and crankshaft thereof | |
| CN104235017A (en) | Scroll compressor | |
| CN207212924U (en) | Parts of bearings and there is its compressor, refrigerating plant | |
| EP3249228B1 (en) | Compressor | |
| CN109595251A (en) | Parts of bearings and compressor, refrigerating plant with it | |
| EP2942526B1 (en) | Rotary compressor | |
| CN105090031B (en) | Rotary compressor and there is its refrigerating circulatory device | |
| CN205135998U (en) | Multi -cylinder rotary compressor and refrigerating system who has it | |
| EP2685106B1 (en) | Two-stage compressor and two-stage compression system | |
| CN205036581U (en) | Rotary compressor and refrigeration cycle device with same | |
| CN202545251U (en) | Compression unit and compressor | |
| CN209195711U (en) | Rotary compressor and the refrigeration system with it, air conditioner | |
| CN208870785U (en) | The single-stage compressor with rolling rotor of four ten grades of cylinder displacements | |
| CN207297362U (en) | Rotary compressor | |
| CN105003526A (en) | Rotary compressor and crankshaft thereof | |
| CN207297361U (en) | Rotary compressor | |
| JP2019035391A (en) | Compressor | |
| EP2636903A2 (en) | Rotary compressor | |
| JP6502078B2 (en) | Compressor | |
| CN204783677U (en) | Rotary compressor and bent axle thereof | |
| CN204312358U (en) | For rotary compressor compressing mechanism and there is its rotary compressor | |
| JP5923983B2 (en) | Rotary compressor | |
| JP6432340B2 (en) | Rotary compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |