CN204205741U - Stator core and stator, motor - Google Patents
Stator core and stator, motor Download PDFInfo
- Publication number
- CN204205741U CN204205741U CN201420591514.4U CN201420591514U CN204205741U CN 204205741 U CN204205741 U CN 204205741U CN 201420591514 U CN201420591514 U CN 201420591514U CN 204205741 U CN204205741 U CN 204205741U
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- stator core
- stator
- wall
- straight flange
- flange portion
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Abstract
The utility model relates to stator core and stator, motor, stator core comprises the yoke portion with madial wall and lateral wall and several are convexly equipped in teeth portion on madial wall, formation winding slot is all enclosed between arbitrary neighborhood two teeth portion and madial wall, lateral wall is also convexly equipped with several thickening parts, and each thickening part all has the contact-making surface contacting with casing inner wall and coordinate.The utility model, by projection thickening part on the lateral wall in yoke portion, can reach on the one hand and reduce the close object of yoke portion magnetic, thus reduce the iron loss in yoke portion; Realize the supporting and location of stator core in casing by thickening part on the other hand, and by thickening part, the heat on stator core is delivered on casing, thus expand area of dissipation; The heat dissipation wind channel formed between adjacent two thickening parts and yoke portion lateral wall, casing inner wall on the one hand again, can accelerate the heat radiation of stator core further, improve the cooling system of stator core.
Description
Technical field
The utility model belongs to machine field, particularly relates to stator core and has the stator of this stator core, has the motor of this stator.
Background technology
In the miniature high-speed motor of the existing range of speeds at more than 20000rpm (rev/min), stator winding is set around in the teeth portion of stator core more, and the yoke portion of stator core is generally circumferential closing and the structure of uniform wall thickness, stator core is supported by the lateral wall in yoke portion and is contacted with on the inwall of casing, and the miniature high-speed motor of this structure has the following disadvantages in a particular application:
1) stator area of dissipation is little, and radiation processes is slow, causes the temperature rise in motor operation course higher;
2) due to the small volume of miniature high-speed motor, therefore, stator winding directly coiling in the teeth portion of integrally-built stator core, its spatial limitation be subject to is larger, especially, when the internal diameter of stator core is less than 20mm, it is more difficult that employing machine directly carries out Automated winding in the teeth portion of integrally-built stator core.
Utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provide stator core and there is the stator of this stator core, there is the motor of this stator, it is intended to solve, and the loss of existing miniature high-speed motor electromagnetic is large, area of dissipation is little, the technical problem of temperature rise in motor operation course.
For achieving the above object, the technical solution adopted in the utility model is: stator core, comprise the yoke portion with madial wall and lateral wall and several are convexly equipped in teeth portion on described madial wall, formation winding slot is all enclosed between teeth portion and described madial wall described in arbitrary neighborhood two, described lateral wall is also convexly equipped with several thickening parts, and each described thickening part all has the contact-making surface contacting with casing inner wall and coordinate.
Particularly, described yoke portion comprise two relative and symmetrically arranged first straight flange portions, two relative and symmetrically arranged two second straight flange portions and several be connected to corner part between adjacent described first straight flange portion and described second straight flange portion, each described thickening part is convexly equipped on each described corner part respectively.
As a specific embodiments of thickening part planform, the second side that described thickening part comprises described contact-making surface, is connected to the first side between described contact-making surface and described first straight flange portion outer wall and is connected between described contact-making surface and described second straight flange portion outer wall, and described first side is along the outer wall inclination extension in described first straight flange portion, described second side tilts to extend along the outer wall in described second straight flange portion.
As another specific embodiments of thickening part planform, the second side that described thickening part comprises described contact-making surface, is connected to the first side between described contact-making surface and described first straight flange portion outer wall and is connected between described contact-making surface and described second straight flange portion outer wall, and described first side is along the straight extension of outer wall in described first straight flange portion, described second side is along the straight extension of outer wall in described second straight flange portion.
Preferably, described contact-making surface is smooth arc surface.
Preferably, described stator core is spliced to enclose by two dividing bodies and forms, and to be described stator core be divided in half into along two relative described thickening parts dividing body described in two.
The stator core that the utility model provides, by projection thickening part on the lateral wall in yoke portion, can reach and effectively reduce the close object of yoke portion magnetic, thus be beneficial to the iron loss reducing yoke portion.Meanwhile, it is coordinated with the contact internal walls of casing by thickening part, can realize the supporting and location of stator core in casing on the one hand; By thickening part, the heat on stator core is delivered on casing on the other hand, thus is beneficial to expansion area of dissipation; On the one hand can form a heat dissipation wind channel between adjacent two thickening parts and yoke portion lateral wall, casing inner wall again, and then be beneficial to the heat radiation accelerating stator core further, improve the cooling system of stator core, slow down the temperature rise of stator core in motor operation course.
Further, it forms by being set to by stator core to be spliced to enclose by two dividing bodies, like this, in a particular application, first can carry out concentrated coiling respectively on two dividing bodies, two dividing bodies are welded to connect formation one-piece stator iron core again, thus are beneficial to when avoiding causing stator winding coiling because stator core internal diameter is little space-constrained situation and occur, and then be beneficial to stator winding and adopt machine to carry out automation coiling.
Further, the utility model additionally provides stator, and it comprises above-mentioned stator core and is set around the stator winding on described stator core, and described stator winding is set around in described teeth portion.
Preferably, described stator winding is two phase windings, and described winding slot is provided with four.
The stator that the utility model provides, owing to have employed above-mentioned stator core, therefore, effectively optimize the structure of stator, reduce the electromagnetic consumable of stator, and improve the cooling system of stator, expand the area of dissipation of stator, slow down stator in the operating temperature rise of motor.
Further, the utility model additionally provides motor, and it comprises casing, rotor and above-mentioned stator, and described stator and described rotor are all located in described casing, and described rotor is arranged in described stator.
Particularly, described rotor comprises rotating shaft, permanent magnet magnetic ring and bond, and described permanent magnet magnetic ring is bonded and fixed in described rotating shaft by described bond.
The motor that the utility model provides, owing to have employed above-mentioned stator, therefore, reduce the operating electromagnetic consumable of motor, and improve the cooling system of motor, reduce the impact of high temperature on motor performance, improve the efficiency of motor.
Accompanying drawing explanation
Fig. 1 is the structural representation of the stator core that the utility model embodiment one provides;
Fig. 2 is the structural representation of the dividing body that the utility model embodiment one provides;
Fig. 3 is the structural representation of the stator that the utility model embodiment one provides;
Fig. 4 is the structural representation of the motor that the utility model embodiment one provides;
Fig. 5 is the structural representation of the rotor that the utility model embodiment one provides;
Fig. 6 is the structural representation of the permanent magnet magnetic ring that the utility model embodiment one provides;
Fig. 7 is the structural representation of the stator core that the utility model embodiment two provides;
Fig. 8 is the structural representation of the stator that the utility model embodiment two provides;
Fig. 9 is the structural representation of the motor that the utility model embodiment two provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
It should be noted that, when an element is described on " being fixed on " or " being arranged at " another element, it can directly on another element or may there is centering elements simultaneously.Be described to be " connection " another element when an element, it can be directly connect another element or may there is centering elements simultaneously.
Embodiment one:
As shown in figures 1-4, the stator core 11 that the utility model embodiment one provides, comprise the yoke portion 111 with madial wall and lateral wall and several are convexly equipped in teeth portion 112 on madial wall, each teeth portion 112 encloses the centre bore 115 being formed and wear for rotor 3, and between arbitrary neighborhood two teeth portion 112 and madial wall, all enclose formation winding slot 114, lateral wall is also convexly equipped with several thickening parts 113, each thickening part 113 all has the contact-making surface 1131 coordinated with casing 2 contact internal walls.The stator core 11 that the utility model embodiment provides, by projection thickening part 113 on the lateral wall in yoke portion 111, can reach and effectively reduce the close object of yoke portion 111 magnetic, thus be beneficial to the iron loss reducing yoke portion 111.Meanwhile, it is coordinated with the contact internal walls of casing 2 by thickening part 113, can realize the supporting and location of stator core 11 in casing 2 on the one hand; By thickening part 113, the heat on stator core 11 is delivered on casing 2 on the other hand, thus is beneficial to expansion area of dissipation; On the one hand can form a heat dissipation wind channel 10 between adjacent two thickening parts 113 and yoke portion 111 lateral wall, casing 2 inwall again, and then be beneficial to the heat radiation accelerating stator core 11 further, improve the cooling system of stator core 11, slow down the temperature rise of stator core 11 in motor operation course.
Particularly, as shown in Figure 1, yoke portion 111 comprise two relative and symmetrically arranged first straight flange portions 1111, two relative and symmetrically arranged two second straight flange portions 1112 and several be connected to corner part 1113 between adjacent first straight flange portion 1111 and the second straight flange portion 1112, each thickening part 113 is convexly equipped on each corner part 1113 respectively.Thickening part 113 is located on corner part 1113, is beneficial on the one hand and reduces thickening part 113 to the impact of stator core 11 exterior contour size, thus be beneficial to the material cost reducing stator core 11; Be beneficial on the other hand and reduce stress and concentrate impact on corner part 1113 structural strength.
Preferably, as shown in Figure 1, the present embodiment, the outer wall in two first straight flange portions 1111 is parallel to each other, and the outer wall in two second straight flange portions 1112 is parallel to each other, and the outer wall in the vertical two second straight flange portions 1112 of the outer wall in two first straight flange portions 1111 difference.
Preferably, as shown in Figure 1, the magnitude setting of thickening part 113 is identical with the magnitude setting of corner part 1113, and on each corner part 1113, correspondence is provided with a thickening part 113, is beneficial to the structural symmetry ensureing stator core 11 like this.
Particularly, as shown in Figure 1, the second side 1133 that thickening part 113 comprises contact-making surface 1131, is connected to the first side 1132 between contact-making surface 1131 and the first straight flange portion 1111 outer wall and is connected between contact-making surface 1131 and the second straight flange portion 1112 outer wall, and the first side 1132 is along the outer wall inclination extension in the first straight flange portion 1111, second side 1133 tilts to extend along the outer wall in the second straight flange portion 1112, like this, can reach the object forming thickening part 113 on corner part 1113, and the local achieving stator core 11 wall thickness thickeies.
Preferably, as shown in Figure 1, the first side 1132 is parallel to the second side 1133, like this, is beneficial to the symmetry ensureing stator core 11 structure.
Preferably, contact-making surface 1131 is smooth arc surface, like this, is beneficial to contact-making surface 1131 and coordinates with fully contacting of casing 2 inwall.
Preferably, as shown in Figures 1 to 3, stator core 11 is spliced to enclose by two dividing bodies 110 and forms, and to be stator core 11 be divided in half into along two relative thickening parts 113 two dividing bodies 110, and the thickening part 113 of segmentation is provided with welding groove 1101.Two dividing bodies 110 are symmetrical structure, are beneficial to the technique simplifying stator winding 12 coiling on each dividing body 110.In a particular application, first can carry out concentrated coiling (coiling stator winding 12) respectively on two dividing bodies 110, the dividing body 110 being wound with stator winding 12 again by two docks placement, and by welding at welding groove 1101 place, the dividing body 110 that two can be wound with stator winding 12 is welded into an one-piece stator 1.The present embodiment is undertaken by be split into two halves by stator core 11 being welded as a whole after coiling stator winding 12 respectively, when can avoid causing stator winding 12 coiling because stator core 11 internal diameter is little, space-constrained situation occurs, and then is beneficial to stator winding 12 and adopts machine to carry out automation coiling.If be welded as a whole after the stator core 11 of existing structure is also divided into two part coilings, the problem of two aspects can be produced: the high temperature that welding process produces on the one hand can change the electromagnetic property of part near weld seam on stator core 11, thus cause the magnetic property of part near weld seam on stator core 11 to decline; Weld seam can increase the eddy current transmission between stator core 11 silicon steel material on the other hand; And welding groove 1101 is located at the thickening part 113 away from main magnetic circuit by the present embodiment, the impact of welding operation on motor performance can be effectively reduced.Of course, in embody rule, stator core 11 also can be set to along the circumferential direction to be spliced to enclose by plural dividing body 110 and form, and the concrete structure of dividing body 110 encloses the difference of stator core 11 requirement according to it and different.
Further, as shown in Figure 3, the utility model embodiment one additionally provides stator 1, it stator winding 12 comprising above-mentioned stator core 11 and be set around on stator core 11, stator winding 12 is set around in teeth portion 112, and stator winding 12 is preferably centralized winding.The stator 1 that the present embodiment one provides, owing to have employed above-mentioned stator core 11, therefore, effectively optimize the structure of stator 1, reduce the electromagnetic consumable of stator 1, and improve the cooling system of stator 1, expand the area of dissipation of stator 1, slow down stator 1 in the operating temperature rise of motor.
Preferably, stator winding 12 is two phase windings, and namely stator winding 12 comprises the different winding of two groups of phasic properties, winding slot 114 is provided with four, like this, under the prerequisite meeting motor speed designing requirement, the structure of stator 1 can be made to be optimized, to be beneficial to the efficiency improving motor.Of course, in embody rule, under the prerequisite met design requirement, the number of phases of stator winding 12 and the quantity of winding slot 114 also can be set to other numerical value.
Further, as shown in Figure 4, the utility model embodiment one additionally provides motor, and it comprises casing 2, rotor 3 and above-mentioned stator 1, and stator 1 and rotor 3 are all located in casing 2, and rotor 3 is arranged in stator 1.The motor that the present embodiment provides, owing to have employed above-mentioned stator 1, therefore, reduce the operating electromagnetic consumable of motor, and improve the cooling system of motor, reduce the impact of high temperature on motor performance, improve the efficiency of motor.
Particularly, as shown in Figure 4 and Figure 5, rotor 3 comprises rotating shaft 31, permanent magnet magnetic ring 32 and bond (not shown), and permanent magnet magnetic ring 32 is bonded and fixed in rotating shaft 31 by bond.In the present embodiment, by bond, permanent magnet magnetic ring 32 is directly bonded and fixed in rotating shaft 31, and utilize the centrifugal stress produced during strength of materials opposing rotor 3 high speed rotating of permanent magnet magnetic ring 32 itself, thus make that permanent magnet magnetic ring 32 is outer not to be needed to arrange by not magnetic conductive metal material, carbon fiber, the guard ring that glass tape etc. are made, and then the assembling breath reduced between stator 1 and rotor 3, and simplify the structure of rotor 3, eliminate the mounting process of guard ring, avoid and cause the situation of rotor 3 non-uniform mass to occur owing to installing guard ring, improve the dynamic property of rotor 3 high speed rotating, reduce the natural frequency of rotor 3.Meanwhile, because it does not need to design the rotor core be made up of silicon steel sheet, therefore, which reduce the building block quantity of rotor 3, thus further simplify structure and the mounting process of rotor 3, improve the production efficiency of rotor 3 dramatically.
Preferably, permanent magnet magnetic ring 32 is made up of sintered neodymium iron boron material, like this, is beneficial to the magnetic and the strength of materials that ensure permanent magnet magnetic ring 32.
Preferably, permanent magnet magnetic ring 32 is a pair pole magnet ring (number of pole-pairs is the magnet ring of), like this, the inversion frequency in magnetic field can be made to be down to minimum under identical rotating speed, thus stator core 11 can be dropped to floor level by the impact of magnetic field inversion frequency; Meanwhile, it also can make the controller corresponding with magnetic field inversion frequency electrically open frequency to reduce, and then reduces the switching loss of controller.Of course, in embody rule, under the prerequisite met design requirement, the number of pole-pairs of permanent magnet magnetic ring 32 also can be set to two pairs or more.
Preferably, bond is glue, and its Cohesion reliability is good, is easy to install.
Particularly, as shown in Figure 6, permanent magnet magnetic ring 32 runs through and is provided with axially extending bore 321, and axially extending bore 321 and rotating shaft 31 matched in clearance are arranged, and glue is located between axially extending bore 321 inwall and rotating shaft 31 outer wall.During concrete installation, should by glue uniform application between axially extending bore 321 and the gap of rotating shaft 31, and the mode heating or be long placed in can be adopted to make glue curing between axially extending bore 321 and rotating shaft 31.
Preferably, the internal diameter of permanent magnet magnetic ring 32 is 3mm, and the external diameter of permanent magnet magnetic ring 32 is less than or equal to 12mm; Or the internal diameter of permanent magnet magnetic ring 32 is 4mm, and the external diameter of permanent magnet magnetic ring 32 is less than or equal to 12.5mm; Or the internal diameter of permanent magnet magnetic ring 32 is 5mm, and the external diameter of permanent magnet magnetic ring 32 is less than or equal to 13.2mm; Or; the internal diameter of permanent magnet magnetic ring 32 is 6mm; and the external diameter of permanent magnet magnetic ring 32 is less than or equal to 14mm; like this; when the Design of Rotation of rotor 3 reaches 60000rpm (rev/min) left and right; the centrifugal stress that permanent magnet magnetic ring 32 produces when the resistance to tension of own material still can be utilized when unprotect ring effectively to resist rotor 3 high speed rotating, and then effectively ensure that the security reliability of rotor 3 high speed rotating.
Preferably, the motor that the present embodiment provides is high-speed small-size permanent magnetic brushless (if rotating speed is at the permanent magnetic brushless of more than 20000rpm), like this, its simplification electric machine structure obtained, simplify motor production technology, reduce to assemble breath between stator 1 and rotor 3, to improve the effect of electric efficiency more remarkable.
Particularly, the motor that the present embodiment provides can be applicable in dust catcher, centrifuge, blower fan, electric tool, small generator, spindle motor.
Embodiment two:
The difference of the present embodiment and embodiment one is mainly the planform of thickening part 113, particularly, as shown in figs. 7-9, in the present embodiment, the second side 1133 that thickening part 113 comprises contact-making surface 1131, is connected to the first side 1132 between contact-making surface 1131 and the first straight flange portion 1111 outer wall and is connected between contact-making surface 1131 and the second straight flange portion 1112 outer wall, and the first side 1132 is along the straight extension of outer wall in the first straight flange portion 1111, the second side 1133 is along the straight extension of outer wall in the second straight flange portion 1112.In embodiment one, the first side 1132 and the second side 1133 tilt to extend along the outer wall in the outer wall in the first straight flange portion 1111 and the second straight flange portion 1112 respectively, and the first side 1132 and the second side 1133 are parallel to each other; And in the present embodiment, first side 1132 and the second side 1133 are respectively along the outer wall in the first straight flange portion 1111 and the straight extension of outer wall in the second straight flange portion 1112, have the angle being greater than zero between first side 1132 and the second side 1133, embodiment one and the present embodiment all can reach and form the object that thickening part 113 also realizes locally thickening stator core 11 on corner part 1113.Compared with embodiment one, stator core 11 yoke portion 111 and teeth portion 112 measure-alike when, because in area ratio the present embodiment of the contact-making surface 1131 of thickening part 113 in embodiment one, the area of the contact-making surface 1131 of thickening part 113 is large, therefore the heat-transfer capability (heat on stator core 11 is passed to the ability on casing 2) of stator core 11 is stronger than the heat-transfer capability of stator core in the present embodiment 11 in embodiment one; And the material usage of stator core 11 can be less than the material usage of stator core 11 in embodiment one in the present embodiment, in the present embodiment, the quality (weight) of stator core 11 also can be less than the quality of stator core 11 in embodiment one, and when coordinating with the casing 2 of same inner diameter, the area of the heat dissipation wind channel 10 formed in the present embodiment is larger, axial windage is lower, more be conducive to axial ventilation, therefore, the stator core 11 that the present embodiment provides is more suitable for the miniature high-speed Fan Equipment for having axial ventilation to require to casing 2 inside.
Except the planform difference of thickening part 113 on said stator iron core 11, the design principle of other structure of the stator core 11 that the present embodiment provides, stator 1 and motor is all identical with the design principle of embodiment one, be not described in detail in this, specifically can see embodiment one.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace or improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. stator core, comprise the yoke portion with madial wall and lateral wall and several are convexly equipped in teeth portion on described madial wall, formation winding slot is all enclosed between teeth portion and described madial wall described in arbitrary neighborhood two, it is characterized in that: described lateral wall is also convexly equipped with several thickening parts, each described thickening part all has the contact-making surface contacting with casing inner wall and coordinate.
2. stator core as claimed in claim 1, it is characterized in that: described yoke portion comprise two relative and symmetrically arranged first straight flange portions, two relative and symmetrically arranged two second straight flange portions and several be connected to corner part between adjacent described first straight flange portion and described second straight flange portion, each described thickening part is convexly equipped on each described corner part respectively.
3. stator core as claimed in claim 2, it is characterized in that: the second side that described thickening part comprises described contact-making surface, is connected to the first side between described contact-making surface and described first straight flange portion outer wall and is connected between described contact-making surface and described second straight flange portion outer wall, and described first side is along the outer wall inclination extension in described first straight flange portion, described second side tilts to extend along the outer wall in described second straight flange portion.
4. stator core as claimed in claim 2, it is characterized in that: the second side that described thickening part comprises described contact-making surface, is connected to the first side between described contact-making surface and described first straight flange portion outer wall and is connected between described contact-making surface and described second straight flange portion outer wall, and described first side is along the straight extension of outer wall in described first straight flange portion, described second side is along the straight extension of outer wall in described second straight flange portion.
5. the stator core as described in any one of Claims 1-4, is characterized in that: described contact-making surface is smooth arc surface.
6. the stator core as described in any one of Claims 1-4, is characterized in that: described stator core is spliced to enclose by two dividing bodies and forms, and to be described stator core be divided in half into along two relative described thickening parts dividing body described in two.
7. stator, is characterized in that: comprise stator core as described in any one of claim 1 to 6 and stator winding on stator core as described in being set around, described stator winding is set around in described teeth portion.
8. stator as claimed in claim 7, is characterized in that: described stator winding is two phase windings, and described winding slot is provided with four.
9. motor, comprises casing and rotor, it is characterized in that: also comprise stator as claimed in claim 7 or 8, and described stator and described rotor are all located in described casing, and described rotor is arranged in described stator.
10. motor as claimed in claim 9, it is characterized in that: described rotor comprises rotating shaft, permanent magnet magnetic ring and bond, described permanent magnet magnetic ring is bonded and fixed in described rotating shaft by described bond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420591514.4U CN204205741U (en) | 2014-10-13 | 2014-10-13 | Stator core and stator, motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420591514.4U CN204205741U (en) | 2014-10-13 | 2014-10-13 | Stator core and stator, motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204205741U true CN204205741U (en) | 2015-03-11 |
Family
ID=52663657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420591514.4U Expired - Fee Related CN204205741U (en) | 2014-10-13 | 2014-10-13 | Stator core and stator, motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204205741U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679085A (en) * | 2018-06-14 | 2018-10-19 | 珠海格力电器股份有限公司 | Radial stator core structure, bearing stator and hybrid radial magnetic bearing |
| CN110460174A (en) * | 2019-09-02 | 2019-11-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator core, motor and compressor |
-
2014
- 2014-10-13 CN CN201420591514.4U patent/CN204205741U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679085A (en) * | 2018-06-14 | 2018-10-19 | 珠海格力电器股份有限公司 | Radial stator core structure, bearing stator and hybrid radial magnetic bearing |
| CN108679085B (en) * | 2018-06-14 | 2023-08-22 | 珠海格力电器股份有限公司 | Radial stator core structure, bearing stator and hybrid radial magnetic suspension bearing |
| CN110460174A (en) * | 2019-09-02 | 2019-11-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator core, motor and compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20150311 Termination date: 20211013 |