CN216599249U - Motor oil cooling system and motor - Google Patents
Motor oil cooling system and motor Download PDFInfo
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- CN216599249U CN216599249U CN202123454483.7U CN202123454483U CN216599249U CN 216599249 U CN216599249 U CN 216599249U CN 202123454483 U CN202123454483 U CN 202123454483U CN 216599249 U CN216599249 U CN 216599249U
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- oil injection
- mounting groove
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Abstract
The utility model discloses a motor oil cooling system and motor. The motor oil cooling system comprises a shell and an oil injection piece, the shell is provided with an axial direction and a circumferential direction, an inner wall face of the shell corresponds to the stator winding and is provided with a mounting groove, the mounting groove is arranged along the circumferential direction of the shell in an extending mode, the inner wall face of the shell is further provided with an oil delivery channel communicated with the mounting groove, the oil injection piece is fixed inside the mounting groove, a plurality of communicated oil injection holes are formed in the side wall face of the oil injection piece, and the oil injection holes are arranged along the circumferential direction of the shell in an extending mode. The utility model discloses technical scheme aims at optimizing the cold system of motor oil, promotes the cooling efficiency of motor.
Description
Technical Field
The utility model relates to a motor oil cooling system technical field, in particular to motor oil cooling system and motor of using this motor oil cooling system.
Background
In the motor oil cooling system, cooling oil is sprayed to the positions of a stator winding and the like for cooling under the action of external pressure or self gravity. As shown in fig. 1, the motor oil cooling system in the related art includes an oil pipe (60) and an oil baffle plate (70), the oil pipe (60) is fixed to the inner wall surface of the casing (10) by the oil baffle plate (70) in an annular manner, oil injection holes are formed in the oil pipe at intervals, and cooling oil is injected onto the stator winding through the oil injection holes. However, the space occupied by the oil pipe in the scheme is large, and the electric clearance is affected. Moreover, the oil pipe is difficult to fix, and the number of oil injection holes is difficult to arrange, so that the cooling effect is not ideal.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing a motor oil cooling system aims at optimizing motor oil cooling system, promotes the cooling efficiency of motor.
In order to achieve the above object, the utility model provides a motor oil cooling system for cool off stator winding, include:
the stator winding comprises a casing, wherein the casing is provided with an axial direction and a circumferential direction, a mounting groove is formed in the inner wall surface of the casing corresponding to the stator winding, the mounting groove extends along the circumferential direction of the casing, and an oil conveying channel communicated with the mounting groove is further formed in the inner wall surface of the casing; and
the oil injection piece is fixed in the mounting groove, a plurality of communicated oil injection holes are further formed in the side wall surface of the oil injection piece, and the oil injection holes are arranged along the circumferential direction of the casing in an extending mode.
In an embodiment of the present invention, the oil injection member faces the side wall surface of the mounting groove and is provided with two fixing rings, two the fixing rings are respectively located at two ends of the axial direction of the oil injection member, and the fixing rings are arranged along the circumferential direction of the oil injection member, and the fixing rings are fixed with the side wall surface of the mounting groove.
In an embodiment of the present invention, the mounting groove includes a first segment and a second segment which are oppositely disposed, a fixing structure is disposed between the first segment and the second segment, and the fixing structure is provided with a through hole to communicate the first segment and the second segment;
the oil injection piece comprises a first oil injection ring and a second oil injection ring, the first oil injection ring and the second oil injection ring are fixed in the first section body and the second section body respectively, and two ends of the first oil injection ring and the second oil injection ring in the circumferential direction are abutted to the surface of the fixing structure respectively.
In an embodiment of the present invention, the opposite side surfaces of the fixing structure are respectively provided with one of the positioning column and the positioning hole, the two end surfaces of the first oil spraying ring and the second oil spraying ring in the circumferential direction are respectively provided with the other of the positioning column and the positioning hole, and the positioning column is inserted into the positioning hole.
The utility model discloses an in the embodiment, first spout oil ring with the reference column or the locating hole of the both ends face of the circumference direction of second spout oil ring are all located gu fixed ring is last.
In an embodiment of the present invention, the motor oil cooling system further includes a sealing member, the sealing member is sleeved on the periphery of the oil injection member, and the sealing member abuts against the side wall surface of the mounting groove.
In an embodiment of the present invention, the sealing member is made of rubber or silica gel.
In an embodiment of the present invention, the oil injection member is disposed in a ring shape, and an inner diameter of the oil injection member is larger than an inner diameter of the housing.
The utility model discloses an in the embodiment, the quantity of mounting groove is two, two the mounting groove is located respectively the axial direction both ends of casing, the oil transportation passageway is two respectively the mounting groove intercommunication.
The utility model also provides a motor, the motor includes the cold system of motor oil.
The utility model discloses technical scheme's cold system of motor oil includes casing and oil spout spare, and wherein, the casing roughly is both ends opening drum shape, and the casing has axial direction and circumference direction, and the position that the casing internal face corresponds stator winding is provided with the mounting groove that is used for installing fixed oil spout spare. The side wall face of oil spout spare still is equipped with a plurality ofly and the mounting groove intercommunication and the nozzle opening that extends along the circumferential direction of casing. The casing still is equipped with the oil transportation passageway with the mounting groove intercommunication, so, in the cooling oil can get into the mounting groove via the oil transportation passageway to spout respectively to stator winding via a plurality of nozzle openings, thereby realize cooling stator winding. Compared with the prior art, the technical scheme of the utility model oil spout spare is used to replace and spouts the oil pipe, because in oil spout spare inlays to establish and is fixed in the mounting groove, not only saved the space that oil spout spare occupy, reduced the volume of whole motor effectively, still overcome the problem of spouting the fixed difficulty of oil pipe simultaneously. And, the circumferential direction of oil spout spare can also set up the abundant nozzle opening of quantity for the cooling oil can evenly spout each position of stator winding, promotes the cooling effect to the stator winding.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a motor oil cooling system of a motor in the prior art;
fig. 2 is a schematic structural diagram of a motor with a motor oil cooling system in the technical scheme of the invention;
FIG. 3 is a front view of FIG. 2;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
FIG. 5 is an enlarged view of portion A of FIG. 4;
fig. 6 is a schematic structural view of the housing of the present invention;
FIG. 7 is an enlarged view of portion B of FIG. 6;
FIG. 8 is a sectional view of the cabinet taken along the line B-B;
FIG. 9 is a sectional view of the cabinet in the direction C-C;
FIG. 10 is a schematic structural view of an embodiment of an oil injection member;
fig. 11 is a schematic structural view of the sealing member.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Electric machine | 33 | Second |
| 10 | Casing (CN) | 35 | |
| 11 | |
37 | |
| 111 | |
39 | |
| 113 | |
40 | |
| 115 | |
50 | |
| 117 | Through |
51 | Stator winding |
| 119 | Locating |
53 | |
| 13 | |
60 | |
| 30 | |
70 | |
| 31 | First oil spraying ring |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a motor oil cooling system.
Referring to fig. 2 to 5, fig. 2 is a schematic structural diagram of a motor having the motor oil cooling system of the present invention; fig. 3 is a front view of fig. 2, fig. 4 is a sectional view taken along line a-a of fig. 3, and fig. 5 is an enlarged view of portion a of fig. 4. The utility model provides a motor oil cooling system is used for cooling stator winding 51, and this motor oil cooling system includes casing 10 and oil spout piece 30. The casing 10 is substantially a cylindrical structure with two open ends, such that the casing 10 has an axial direction and a circumferential direction (not shown) perpendicular to each other. The inner wall surface of the casing 10 is provided with a mounting groove 11 corresponding to the stator winding 51, the mounting groove 11 extends along the circumferential direction of the casing 10, the inner wall surface of the casing 10 is further provided with an oil injection piece 30 of an oil delivery channel 13 communicated with the mounting groove 11 and fixed inside the mounting groove 11, the side wall surface of the oil injection piece 30 is further provided with a plurality of oil injection holes 35 communicated with the mounting groove 11, and the plurality of oil injection holes 35 extend along the circumferential direction of the casing 10.
The utility model discloses cold system of motor oil includes casing 10 and oil spout piece 30, and wherein, casing 10 is roughly the both ends opening drum shape, and casing 10 has axial direction and circumference direction, and the position that the casing 10 internal face corresponds stator winding 51 is provided with the mounting groove 11 that is used for the fixed oil spout piece 30 of installation. The side wall surface of the oil injection member 30 is further provided with a plurality of oil injection holes 35 communicating with the mounting groove 11 and extending in the circumferential direction of the casing 10. The casing 10 is further provided with an oil delivery passage 13 communicated with the mounting groove 11, so that cooling oil can enter the mounting groove 11 through the oil delivery passage 13 and be respectively sprayed onto the stator windings 51 through the plurality of oil spray holes 35, thereby cooling the stator windings 51. Compared with the prior art, the technical scheme of the utility model oil spout piece 30 is used to replace and spouts the oil pipe, because spout oil piece 30 inlays to establish and is fixed in mounting groove 11 in, has not only saved the space that oil spout piece 30 occupy, has still overcome the problem of spouting the fixed difficulty of oil pipe simultaneously. In addition, a sufficient number of oil spray holes 35 can be arranged in the circumferential direction of the oil spray piece 30, so that the cooling oil can be uniformly sprayed to all positions of the stator winding 51, and the cooling effect on the stator winding 51 is improved.
It can be understood that the mounting groove 11 extends along the circumferential direction of the casing 10, wherein the arc of the mounting groove 11 extending along the circumferential direction of the inner wall surface of the casing 10 may be 90 °, 180 °, 270 °, 300 °, 340 °, 360 ° or the like, the arc of the mounting groove 11 extending along the circumferential direction of the casing 10 may be any arc, and correspondingly, the shape of the oil injection member 30 is adapted to the shape of the mounting groove 11. For example, when the arc of the mounting groove 11 extending in the circumferential direction of the housing 10 is 180 °, the oil injection member 30 is formed in a semicircular ring structure. When the radian of the installation groove 11 extending along the circumferential direction of the machine shell 10 is 340 degrees, the oil injection piece 30 is formed into an annular structure with an opening; when the radian of the installation groove 11 extending along the circumferential direction of the machine shell 10 is 360 degrees, the oil injection piece 30 is formed into a closed-loop annular structure; the shape of the oil injection piece 30 is matched with the shape of the mounting groove 11. In an embodiment of the present invention, the inner diameter of the oil injection member 30 should be slightly larger than the minimum inner diameter of the casing 10, so as to ensure that the oil injection member 30 can be completely embedded into the mounting groove 11, and thus, the setting of the oil injection member 30 does not affect the interference fit between the stator winding 51 and the casing 10.
It is understood that in the motor 100, both ends of the stator 50 are provided with the stator windings 51. Therefore, in the embodiment of the present invention, the number of the mounting grooves 11 disposed on the casing 10 is two, and the two mounting grooves 11 are disposed at two ends of the casing 10 in the axial direction respectively. At this time, the oil delivery passages 13 are respectively provided in communication with the two mounting grooves 11. Specifically, one end of the oil delivery passage 13 penetrates the surface of the casing 10 to form an oil inlet (not shown), which may be an end surface disposed in the axial direction of the casing 10, a side wall surface of the casing 10, or the like, through which the cooling oil can flow into the oil delivery passage 13.
Compared with the scheme that the oil pipe 60 is fixed on the inner wall surface of the casing 10 and the oil injection holes are arranged on the oil pipe 60 at intervals, the oil pipe 60 is easy to displace when being collided by other parts, so that the direction of the oil injection holes arranged on the oil pipe 60 is changed, and the accurate control of the oil injection direction is difficult to realize.
In the scheme of the application, the installation groove 11 is formed in the inner wall surface of the casing 10, the oil injection piece 30 is embedded into the installation groove 11, the oil injection piece 30 can be prevented from colliding with other parts of the motor 100, the position of the oil injection hole 35 is prevented from being displaced, and the oil injection angle can be accurately controlled. Further, the accuracy of the oil injection amount and/or the oil injection angle of the stator winding 51 can be further improved by controlling the flow rate or the pressure of the input cooling oil.
Referring to fig. 6 to 10, in an embodiment of the present invention, two fixing rings 37 are convexly disposed on the side wall surface of the oil injection member 30 facing the mounting groove 11, the two fixing rings 37 are respectively disposed at two ends of the oil injection member 30 in the axial direction, the fixing rings 37 extend along the circumferential direction of the oil injection member 30, and the fixing rings 37 are fixed to the side wall surface of the mounting groove 11.
In the technical solution of the present invention, the fixing ring 37 is disposed along the extending direction of the oil injection member 30. Set up solid fixed ring 37 through the axial direction both ends of oil spout piece 30, gu fixed ring 37 can with the tank bottom wall butt of mounting groove 11, so, the tank bottom wall of mounting groove 11 and the side wall face of oil spout piece 30 then can form the clearance that is used for being convenient for the coolant oil to flow, so, also can reduce the resistance that the coolant oil flowed in mounting groove 11, promote the smooth and easy nature that the coolant oil flowed in mounting groove 11. Further, the number of the fixed rings 37 is two, so that the fixing stability of the oil injection assembly can be further improved. The cross-section of the fixing ring 37 is arc-shaped, which is convenient for processing on one hand and reduces the resistance of the cooling oil flow on the other hand.
Referring to fig. 6 to 11, in an embodiment of the present invention, the mounting groove 11 includes a first segment 111 and a second segment 113 that are oppositely disposed, a fixing structure 115 is disposed between the first segment 111 and the second segment 113, the fixing structure 115 is provided with a through hole 117, and the first segment 111 and the second segment 113 are communicated through the through hole 117;
the oil injection piece 30 comprises a first oil injection ring 31 and a second oil injection ring 33, the first oil injection ring 31 and the second oil injection ring 33 are respectively fixed in the first segment body 111 and the second segment body 113, and two ends of the first oil injection ring 31 and the second oil injection ring 33 in the circumferential direction are respectively abutted to the surface of the fixing structure 115.
The utility model discloses an among the technical scheme of an embodiment, through setting up mounting groove 11 into the segmentation structure for be formed with fixed knot structure 115 in the mounting groove 11, fixed knot structure 115 can be convenient for spout the fixed of oil piece 30. It should be noted that the fixing structure 115 may be a fixing column or a fixing block. It will be appreciated that the fixing structure 115 is an integral structure with the casing 10 to facilitate the processing of the mounting groove 11. When the number of the fixing structures 115 is only one, the mounting groove 11 is still one end, and at this time, the oil injection piece 30 is in a notched ring structure, and two end faces of the oil injection piece 30, which are provided with notches, are respectively abutted and fixed with two side surfaces of the fixing structures 115. When the number of the fixing structures 115 is two, and the fixing structures 115 are symmetrically arranged, in this way, the mounting groove 11 is formed as the first section 111 and the second section 113 which are symmetrically arranged, the fixing structure 115 is further provided with a through hole 117 so as to facilitate the communication between the first section 111 and the second section 113, thereby realizing the flow of the cooling oil between the first section 111 and the second section 113; at this time, the injection member 30 is formed as a first injection ring 31 and a second injection ring 33 which are symmetrically disposed. Of course, in some embodiments, the first segment 111 and the second segment 113 may be asymmetrically disposed, and the first oil injection ring 31 and the second oil injection ring 33 are also formed in an asymmetric structure. By providing the fixing structure 115 in the installation groove 11, the reliability of fixing the oil injection member 30 to the housing 10 can be improved.
Further, referring to fig. 6 to 10, in an embodiment of the present invention, two opposite side surfaces of the fixing structure 115 are respectively provided with one of the positioning columns 39 and the positioning holes 119, two end surfaces of the first oil injection ring 31 and the second oil injection ring 33 in the circumferential direction are respectively provided with the other of the positioning columns 39 and the positioning holes 119, and the positioning columns 39 are inserted into the positioning holes 119.
The utility model provides an among the technical scheme of an embodiment, through being provided with reference column 39 or locating hole 119 on fixed knot constructs 115's surface, first oil spout ring 31 and second oil spout ring 33 all are provided with corresponding reference column 39 or locating hole 119 at two terminal surfaces of circumference direction, insert reference column 39 and locate in locating hole 119 to further promote the stability that oil spout piece 30 is fixed in mounting groove 11. In an embodiment, the surface of the fixing structure 115 is provided with a positioning hole 119, and both end surfaces of the first oil injection ring 31 and the second oil injection ring 33 in the circumferential direction are provided with positioning pillars 39. The positioning post 39 may be circular, square, D-shaped, etc., and the positioning hole 119 is disposed in a shape corresponding to the positioning post 39. It is understood that the number of each end positioning post 39 or positioning hole 119 may be one, two, or the like. The positioning post 39 or the positioning hole 119 can be disposed on the fixing ring 37, so that the positioning of the fixing post or the fixing hole can be facilitated.
Further, referring to fig. 11, in an embodiment of the present invention, the motor oil cooling system further includes a sealing member 40, and the sealing member 40 is sleeved on the oil injection member 30 and abuts against the side wall surface of the mounting groove 11.
The utility model provides an among the technical scheme of an embodiment, the material of sealing member 40 can be rubber material or silica gel material, and rubber material or silica gel material have good toughness, can satisfy the sealed to mounting groove 11. Specifically, the shape of the sealing element 40 is matched with the shape of the oil injection piece 30, the sealing element 40 is sleeved on the periphery of the oil injection piece 30 and is abutted against the groove wall of the mounting groove 11 to seal the mounting groove 11, cooling oil is prevented from leaking from the assembly gap between the mounting groove 11 and the oil injection piece 30, the cooling oil is ensured to be sprayed out through the oil injection hole 35, and the spraying direction of the oil injection hole 35 can be controlled. When the injection piece 30 is annularly arranged, the sealing member 40 is also annularly shaped. When the injection piece 30 comprises two semicircular first and second injection rings 31, 33, the shape of the sealing element 40 is adapted to the shape of the first and second injection rings 31, 33.
The utility model discloses still provide a motor 100, this motor 100 includes foretell motor oil cooling system, and the concrete structure of this motor oil cooling system refers to above-mentioned embodiment, because this motor 100 has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here. The motor 100 includes a stator 50, a stator winding 51 disposed at two ends of the stator 50, and a rotor 53, wherein the stator 50 and the stator winding 51 are fixed to the housing 10, and the rotor 53 is rotatably disposed in the stator 50.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the patent scope of the utility model, all be in the utility model discloses a under the design, utilize the equivalent structure transform of what the content of the description and the attached drawing was done, or direct/indirect application all includes in other relevant technical field the utility model discloses a patent protection is within range.
Claims (10)
1. An electric machine oil cooling system for cooling stator windings, comprising:
the stator winding comprises a casing, wherein the casing is provided with an axial direction and a circumferential direction, a mounting groove is formed in the inner wall surface of the casing corresponding to the stator winding, the mounting groove extends along the circumferential direction of the casing, and an oil conveying channel communicated with the mounting groove is further formed in the inner wall surface of the casing; and
the oil injection piece is fixed in the mounting groove, a plurality of communicated oil injection holes are further formed in the side wall surface of the oil injection piece, and the oil injection holes are arranged along the circumferential direction of the casing in an extending mode.
2. The motor oil cooling system according to claim 1, wherein two fixing rings are protruded from the oil injection member toward the side wall surface of the mounting groove, the two fixing rings are respectively located at two ends of the oil injection member in the axial direction, the fixing rings extend in the circumferential direction of the oil injection member, and the fixing rings are fixed to the side wall surface of the mounting groove.
3. The motor oil cooling system of claim 2, wherein the mounting groove comprises a first segment and a second segment which are oppositely arranged, a fixing structure is arranged between the first segment and the second segment, and the fixing structure is provided with a through hole to communicate the first segment and the second segment;
the oil injection piece comprises a first oil injection ring and a second oil injection ring, the first oil injection ring and the second oil injection ring are fixed in the first section body and the second section body respectively, and two ends of the first oil injection ring and the second oil injection ring in the circumferential direction are abutted to the surface of the fixing structure respectively.
4. The motor oil cooling system according to claim 3, wherein opposite side surfaces of the fixing structure are provided with one of positioning pillars and positioning holes, and both end surfaces in the circumferential direction of the first oil injection ring and the second oil injection ring are provided with the other of the positioning pillars and the positioning holes, and the positioning pillars are inserted into the positioning holes.
5. The motor oil cooling system according to claim 4, wherein positioning columns or positioning holes at both end surfaces of the first oil injection ring and the second oil injection ring in the circumferential direction are provided on the fixing ring.
6. The motor oil cooling system of claim 2, further comprising a sealing member, wherein the sealing member is sleeved on a periphery of the oil injection member, and the sealing member abuts against a side wall surface of the mounting groove.
7. The motor oil cooling system of claim 6, wherein the sealing member is made of rubber or silicone.
8. The motor oil cooling system of claim 1, wherein the oil injection member is formed in a ring shape, and an inner diameter of the oil injection member is larger than an inner diameter of the casing.
9. The motor oil cooling system according to any one of claims 1 to 8, wherein the number of the mounting grooves is two, the two mounting grooves are respectively located at both ends of the casing in the axial direction, and the oil delivery passage is respectively communicated with the two mounting grooves.
10. An electric machine comprising an electric machine oil cooling system as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123454483.7U CN216599249U (en) | 2021-12-31 | 2021-12-31 | Motor oil cooling system and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123454483.7U CN216599249U (en) | 2021-12-31 | 2021-12-31 | Motor oil cooling system and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216599249U true CN216599249U (en) | 2022-05-24 |
Family
ID=81631698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123454483.7U Active CN216599249U (en) | 2021-12-31 | 2021-12-31 | Motor oil cooling system and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216599249U (en) |
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2021
- 2021-12-31 CN CN202123454483.7U patent/CN216599249U/en active Active
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| CP03 | Change of name, title or address |
Address after: 215000 52 tianedang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: Suzhou Huichuan United Power System Co.,Ltd. Address before: 215104 No. 52, tiandang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee before: SUZHOU HUICHUAN UNITED POWER SYSTEM Co.,Ltd. |