CN110996633B - Radiator structure, radiator and air conditioner that radiating efficiency is high - Google Patents
Radiator structure, radiator and air conditioner that radiating efficiency is high Download PDFInfo
- Publication number
- CN110996633B CN110996633B CN202010008101.9A CN202010008101A CN110996633B CN 110996633 B CN110996633 B CN 110996633B CN 202010008101 A CN202010008101 A CN 202010008101A CN 110996633 B CN110996633 B CN 110996633B
- Authority
- CN
- China
- Prior art keywords
- tree
- branch
- heat sink
- trunk
- radiator
- 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
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000005452 bending Methods 0.000 claims description 34
- 238000012887 quadratic function Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 3
- 230000017525 heat dissipation Effects 0.000 description 18
- 230000000694 effects Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The invention provides a radiator structure with high radiating efficiency, a radiator and an air conditioner. The radiator structure includes: a body; the tree-shaped fin comprises a trunk part and branch parts, wherein the trunk part is arranged on the body, and the branch parts are arranged on the trunk part. According to the radiator structure with high radiating efficiency, the radiator and the air conditioner, the tree-shaped fins are arranged, the branch parts are arranged in the shape of the secondary curve, the radiating area is increased, gaps among the tree parts are effectively utilized to reduce fluid resistance, the radiating efficiency is effectively improved, and the tree crowns parallel to the body ensure that the tree-shaped fins are reliably protected by the tree crowns in the transportation process, the anti-collision capacity is effectively improved, and the reliability of the radiator structure is improved.
Description
Technical Field
The invention relates to the technical field of heat dissipation devices, in particular to a heat radiator structure with high heat dissipation efficiency, a heat radiator and an air conditioner.
Background
Traditional fin radiator generally adopts the linear type fin to dispel the heat, to electric box and electronic components isotructure that heating power density is high, and heat radiating area is little in limited size, and the radiating efficiency is low, and its structural existence is pointed, and occupation space is big and easily receive mechanical stress and the breakage, and the force stability is not high, and anti collision performance is poor.
Disclosure of Invention
In order to solve the technical problem of low heat dissipation efficiency of a heat sink in the prior art, the heat sink structure with the tree-shaped fins and the tree branch parts forming the secondary curve shape and high heat dissipation efficiency is provided, and the heat sink and the air conditioner are provided.
A heat sink structure comprising:
a body;
the tree-shaped fin comprises a trunk part and branch parts, wherein the trunk part is arranged on the body, and the branch parts are arranged on the trunk part;
the branch part forms a first bending part and a second bending part which are connected with each other along the direction far away from the branch part, and the position where the distance from the branch part to the body is the largest is located at the connection position of the first bending part and the second bending part.
The tree-shaped fins are multiple in number, and the branch parts of the two adjacent tree-shaped fins are arranged at intervals along the direction far away from the body.
The trunk part is provided with a first side and a second side which are opposite, the first side is provided with two branch parts, and the second side is provided with one branch part.
The branch part of the second side of one of the two adjacent tree fins is positioned between the two branch parts of the first side of the other tree fin.
One of the two branches of the first side is located at one third of the height of the trunk portion, and the other branch is located at two thirds of the height of the trunk portion.
The branch portion of the second side is at one-half of the height of the trunk portion.
Along the length direction of the body, a distance is reserved between every two adjacent tree parts, and the distance from the position, where the distance from the branch part to the body is the largest, to the corresponding tree part is equal to one half of the distance.
The first end of the first bending part is fixedly arranged on the side surface of the tree part, the second end of the first bending part is connected with the end part of the second bending part, and the angle range of an included angle alpha formed by a tangent line corresponding to the first end and the side surface of the tree part is 100-170 degrees.
The end part of the second bending part, which is far away from the first bending part, is positioned between the tangent of the first end and the body.
The ratio of the thickness of the branch part to the thickness of the trunk part is in the range of 1: 1 to 1: 3.
the shape formed by the first bending part and the second bending part conforms to a quadratic function curve.
The tree-shaped fin further comprises a crown, and the crown is arranged at the end part, far away from the body, of the trunk part.
The crown is parallel to the body.
A radiator comprises the radiator structure.
An air conditioner comprises the radiator structure or the radiator.
According to the radiator structure with high radiating efficiency, the radiator and the air conditioner, the tree-shaped fins are arranged, the branch parts are arranged in the shape of the secondary curve, the radiating area is increased, gaps among the tree parts are effectively utilized to reduce fluid resistance, the radiating efficiency is effectively improved, and the tree crowns parallel to the body ensure that the tree-shaped fins are reliably protected by the tree crowns in the transportation process, the anti-collision capacity is effectively improved, and the reliability of the radiator structure is improved.
Drawings
Fig. 1 is a schematic structural diagram of a heat sink structure with high heat dissipation efficiency and a heat sink structure of an embodiment of an air conditioner according to the present invention;
FIG. 2 is a diagram illustrating the effect of heat flux conduction of a conventional fin-type heat sink;
FIG. 3 is a diagram showing the effect of heat flux conduction of a tree-shaped linear dendritic heat sink;
fig. 4 is a diagram illustrating the heat-conducting heat-flux effect of the heat sink structure of the embodiment of the heat sink and the air conditioner with high heat-dissipating efficiency provided by the present invention;
FIG. 5 is a graph showing the effect of temperature distribution and air flow lines in a duct of a conventional fin-type heat sink;
FIG. 6 is a graph showing the effect of temperature distribution and air flow lines in the air duct of the dendritic linear dendritic heat sink;
FIG. 7 is a diagram illustrating the temperature distribution and air flow lines in the air duct of the heat sink structure and the heat sink of the embodiment of the air conditioner with high heat dissipation efficiency according to the present invention;
in the figure:
1. a body; 2. a trunk portion; 3. a branch part; 31. a first bent portion; 32. a second bent portion; 4. and (4) crown.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The heat sink structure shown in fig. 1 includes: a body 1; the tree-shaped fin comprises a trunk part 2 and branch parts 3, wherein the trunk part 2 is arranged on the body 1, and the branch parts 3 are arranged on the trunk part 2; the tree branch part 3 forms a first bending part 31 and a second bending part 32 which are connected with each other along the direction far away from the tree part 2, the position where the distance from the tree branch part 3 to the body 1 is the largest is located at the connection position of the first bending part 31 and the second bending part 32, the heat dissipation area is increased on the limited body 1 size as much as possible, the highest point of the tree branch part 3 is arranged in the middle of the tree branch part, the tree branch part 3 can be deformed at the highest point when being deformed, the mechanical strength of the tree branch part 3 is increased, and meanwhile, the structural stability of the tree branch part 3 when being subjected to the tangential acting force parallel to the bottom plate of the radiator is effectively improved. The branch part 3 comprises a curved symmetrical structure, in the design, the part of the branch part 3 just extending from the trunk part 2 is short in distance from the trunk part 2, the branch part 3 at the top point is easy to break when being subjected to tangential collision force due to long extending distance, therefore, the top point of the secondary curve is arranged at the top point of the branch part 3, the length of the branch part 3 extending downwards from the top point is short, the structural stability is enhanced by using the curvature of the material, the fluid resistance of the air flow is small when the air flow passes through the radiator, when the flow reaches a stable state, the turbulent kinetic energy or turbulent intensity of the fluid is low, the flow state does not evolve into complete turbulent flow with high Reynolds number, the turbulent flow has obvious vortex, namely, the arc of the second bending part 32 forms small wake vortex at the end part of the branch part 3, which is helpful for reducing the temperature of the hottest point of the radiator structure, therefore, the heat dissipation efficiency is effectively increased, and according to calculation, the heat dissipation area of the radiator structure is 2.25 times that of the common fins, and is increased by 16.02% compared with that of the tree-shaped linear branch radiator, the material cost of the radiator structure is 1.72 times that of the common fins, the material cost of the tree-shaped linear branch radiator is 1.89 times that of the common fins, and compared with the heat dissipation efficiency, the effect of increasing the heat dissipation efficiency is achieved under the condition that the cost is the same.
The quantity of tree-shaped fin is a plurality of, and adjacent two tree-shaped fin tree branch portion 3 is along keeping away from body 1's direction interval sets up to increase tree-shaped fin's installation quantity as far as possible in limited size, utilize the interval of the branch portion 3 that the interval set up, the characteristics that branch portion 3 is parallel to each other simultaneously to concentrate the air mass flow, effectively improve the radiating efficiency.
The trunk 2 has a first side and a second side which are opposite to each other, the first side is provided with two of the branch parts 3, and the second side is provided with one of the branch parts 3, so that the branch parts 3 of two adjacent tree-shaped fins can be staggered with each other, and the problem of interference or contact is avoided.
The branch parts 3 on the second side of one of the two adjacent tree-shaped fins are positioned between the two branch parts 3 on the first side of the other tree-shaped fin, and the branch parts 3 are parallel to each other due to the same shape of the branch parts 3, so that the air mass flow is concentrated, the fluid resistance is reduced, and the purpose of improving the heat dissipation efficiency is achieved.
One of the two branch parts 3 of the first side is located at one third of the height of the trunk part 2, and the other branch part 3 is located at two thirds of the height of the trunk part 2, so that the distance between the two branch parts 3 and the distance from the branch parts 3 to the body 1 are equal, smooth passing of fluid is ensured, the fluid resistance is reduced, and the heat dissipation efficiency is improved.
The branch parts 3 on the second side are located at one-half of the height of the trunk parts 2, that is, the branch parts 3 on two adjacent tree-shaped fins are staggered with each other, and the distances from all the branch parts 3 between the two trunk parts 2 to the body 1 are one-third of the height of the trunk part 2, one-sixth of the height of the trunk part 2 and one-sixth of the height of the trunk part 2 in sequence, so that the generated fluid resistance is reduced, and the heat dissipation efficiency is improved.
A distance is formed between two adjacent trunk parts 2, preferably, the trunk parts 2 have a first side and a second side which are opposite, a branch part 3 is arranged on each of the first side and the second side, the distance is formed between the first side of one trunk part 2 and the second side of the other trunk part 2, and the distance from the position where the distance from the branch part 3 to the body 1 is the largest to the corresponding trunk part 2 is equal to one half of the distance, so that the size which can be reached by the branch part 3 is maximized, the heat dissipation area and the heat dissipation efficiency are increased to the maximum extent, that is, the distance from the highest point of the branch part 3 to the trunk part 2 is equal to one half of the distance, so as to provide a proper space between the trunk parts 2, and if the distance from the highest point to the adjacent trunk part 2 is smaller, the branch parts 3 of the two adjacent trunk parts 2 can interfere, if the distance from the highest point to the adjacent trunk parts 2 is large, the number of trunk parts 2 which can be arranged in a certain area is small, and space waste is caused.
The first end of the first bending portion 31 is fixedly disposed on the side surface of the trunk 2, the second end is connected to the end of the second bending portion 32, and an included angle α formed by a tangent line corresponding to the first end and the side surface of the trunk 2 is in an angle range of 100 ° to 170 °, preferably 130 °, and according to the angle of the included angle, the distance between two adjacent branches 3 is changed, so that the size and the number of the branches 3 in the height direction of the trunk 2 are finally changed, and the shape of the branches 3 is finally determined.
The end of the second bending portion 32 away from the first bending portion 31 is located between the tangent of the first end and the body 1, that is, the second bending portion 32 is always located below the tangent, so as to avoid interference with another branch portion 3.
The ratio of the thickness of the branch part 3 to the thickness of the trunk part 2 is in the range of 1: 1 to 1: 3, preferably 1: 2, thereby make to produce reasonable interval between branch portion 3, reduce the fluid resistance when increasing heat radiating area, improve the radiating efficiency.
The shape formed by the first bent portion 31 and the second bent portion 32 conforms to a quadratic function curve, where the quadratic function has a formula of y ═ kx2And k, b and c of the + bx + c are determined jointly according to the included angle, the setting position of the branch part 3 on the trunk part 2 and the position of the second bending part 32 far away from the end part of the trunk part 2, wherein the initial slope of the quadratic function is calculated according to the included angle, and the setting position of the branch part 3 on the trunk part 2 and the position of the second bending part 32 far away from the end part of the trunk part 2 are specifically determined according to the actual size proportion requirement.
Tree-like fin still includes crown 4, crown 4 set up in trunk 2 is kept away from the tip of body 1 utilizes crown 4 to play the guard action to branch portion 3, has overcome the problem that has the most advanced and easily receive mechanical stress and break down among the prior art simultaneously, improves the force-bearing stability and the anti collision ability of radiator structure, simultaneously in the transportation, can invert the radiator structure for transportation and simple to operate, it is not fragile.
The crown 4 is parallel to the body 1.
According to torrent boundary layer theory, the heat transfer process of torrent no slip wall surface department is the conduction, measures passing to the heat flux on radiator structure surface according to the experiment and knows, as shown in fig. 2 to 4, the heat transfer effect of the radiator structure of this application is best, and the heat transfer effect of the branch portion 3 of quadratic function shape is stronger than the thick branch of linear type, and the heat radiating area utilization ratio is higher relatively.
And performing conjugate heat transfer numerical simulation on the heat dissipation performance and the air flow shape of the radiator under the ambient temperature of 293.15K and the forced convection of the wind speed of 0.3m/s by using a finite element method. The calculated temperature and flow fields of the heat sink are shown in fig. 5-7, where the bottom of the heat sink structure is a 30W uniform heat source with dimensions of 50 x 50 mm. The resolution and the wall lifting distance of the dimensionless wall obtained by calculation of all the calculation examples are 11.06, which are far smaller than the critical value 100 for judging the fineness of the grid, and the analysis of the model on the flow field non-slip wall is accurate enough. As can be seen from the figure, the cooling effect of the radiator structure is best, and compared with a common fin radiator, the highest temperature of the radiator structure is reduced by 24K, and is reduced by 1K compared with a linear branch radiator. It can be seen from the air flow lines in fig. 5-7 that, under the same flow line arrangement condition, the flow of the radiator structure of the present application is mainly concentrated in the radiator, no obvious vortex occurs in the air flow wake thereof, and the hottest point of the radiator is generally at the end of the radiator along the air flow direction, and the temperature of the hottest point of the radiator is favorably reduced due to the minor wake vortex of the quadratic branch, the cooling effect of the radiator structure of the present application is the best, compared with the common fin radiator, the maximum temperature of the radiator structure of the present application is reduced by 24K, which is reduced by 1K compared with the linear branch radiator. Therefore, it can be seen that the flow of the radiator structure of the present application is mainly concentrated in the radiator, no significant vortex occurs in the air flow wake, and the quadratic function shaped branch 3 helps to reduce the temperature of the hottest point of the radiator due to the smaller wake vortex.
TABLE 1 calculation of the thermal flow fields for different heat sink configurations
As can be seen from table 1, for different heat sink structures, the difference between the calculated results of the flow velocity and the pressure is not large, so that the difference between the resistance of the heat sink structure to air is not large, and the heat dissipation area is the dominant factor of the heat exchange effect. It can be stated that the radiator structure of the present application utilizes the branch portion 3 with the quadratic function shape to increase the heat radiation area and reduce the air resistance, thereby obtaining a better heat radiation effect.
A radiator comprises the radiator structure and is applied to an electric appliance box and an electronic component.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. A heat sink structure, characterized in that: the method comprises the following steps:
a body (1);
the tree-shaped fin comprises a trunk part (2) and branch parts (3), wherein the trunk part (2) is arranged on the body (1), and the branch parts (3) are arranged on the trunk part (2);
the branch part (3) forms a first bending part and a second bending part which are connected with each other along the direction far away from the trunk part (2), and the position where the distance from the branch part (3) to the body (1) is the largest is positioned at the connection part of the first bending part and the second bending part;
the number of the tree-shaped fins is multiple, and the branch parts (3) of two adjacent tree-shaped fins are arranged at intervals along the direction far away from the body (1).
2. The heat sink structure according to claim 1, wherein: the trunk (2) has a first side and a second side opposite to each other, two of the branches (3) are arranged on the first side, and one of the branches (3) is arranged on the second side.
3. The heat sink structure according to claim 2, wherein: the branch part (3) of the second side of one of the two adjacent tree-shaped fins is positioned between the two branch parts (3) of the first side of the other tree-shaped fin.
4. The heat sink structure according to claim 2, wherein: one of the two branch parts (3) of the first side is located (3) one third of the height of the trunk (2), the other branch part (3) is located (3) two thirds of the height of the trunk (2), and/or the branch part (3) of the second side is located (3) one half of the height of the trunk (2).
5. The heat sink structure according to claim 1, wherein: the distance between two adjacent tree parts (2) is equal to one half of the distance between the position where the distance from the branch part (3) to the body (1) is the largest and the corresponding tree part (2).
6. The heat sink structure according to claim 1, wherein: the first end of the first bending part (31) is fixedly arranged on the side surface of the tree part (2), the second end of the first bending part is connected with the end part of the second bending part (32), and the included angle alpha formed by the tangent line corresponding to the first end and the side surface of the tree part (2) is within the range of 100-170 degrees.
7. The heat sink structure according to claim 6, wherein: the end part of the second bending part (32) far away from the first bending part (31) is positioned between the tangent of the first end and the body (1).
8. The heat sink structure according to claim 1, wherein: the ratio of the thickness of the branch part (3) to the thickness of the trunk part (2) ranges from 1: 1 to 1: 3.
9. the heat sink structure according to claim 1, wherein: the shape formed by the first bending part (31) and the second bending part (32) conforms to a quadratic function curve.
10. The heat sink structure according to claim 1, wherein: the tree-shaped fin further comprises a crown (4), the crown (4) is arranged at the end part, far away from the body (1), of the trunk part (2), and the crown (4) is parallel to the body (1).
11. A heat sink, characterized by: comprising the heat sink structure of any one of claims 1 to 10.
12. An air conditioner, characterized in that: comprising the heat sink structure of any one of claims 1 to 10 or the heat sink of claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010008101.9A CN110996633B (en) | 2020-01-02 | 2020-01-02 | Radiator structure, radiator and air conditioner that radiating efficiency is high |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010008101.9A CN110996633B (en) | 2020-01-02 | 2020-01-02 | Radiator structure, radiator and air conditioner that radiating efficiency is high |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110996633A CN110996633A (en) | 2020-04-10 |
| CN110996633B true CN110996633B (en) | 2020-09-04 |
Family
ID=70080791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010008101.9A Active CN110996633B (en) | 2020-01-02 | 2020-01-02 | Radiator structure, radiator and air conditioner that radiating efficiency is high |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110996633B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201084726Y (en) * | 2007-05-24 | 2008-07-09 | 北京四方吉思电气有限公司 | Heat radiator |
| CN103968695A (en) * | 2014-05-27 | 2014-08-06 | 哈尔滨工业大学 | Energy storing device with tree directional heat-conducting fin structures |
| CN204887838U (en) * | 2015-07-20 | 2015-12-16 | 桂林电子科技大学科技信息学院 | Electron device radiator that fin width law changes |
| CN105845648A (en) * | 2016-05-10 | 2016-08-10 | 成都中微电微波技术有限公司 | Microelectronic device tree-shaped radiator |
| CN207503143U (en) * | 2017-08-15 | 2018-06-15 | 镇江巍华电子有限公司 | A kind of component for unit radiator |
| CN107404830A (en) * | 2017-09-12 | 2017-11-28 | 珠海格力电器股份有限公司 | Tree-shaped fin, heat radiation structure and electric cabinet |
-
2020
- 2020-01-02 CN CN202010008101.9A patent/CN110996633B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110996633A (en) | 2020-04-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201115191Y (en) | Fin heat radiator | |
| EP2299488B1 (en) | Heat-dissipating fin assembly with heat-conducting structure | |
| CN103841808B (en) | Variable dimension finned radiator | |
| CN110996633B (en) | Radiator structure, radiator and air conditioner that radiating efficiency is high | |
| CN105228423B (en) | A kind of Weaving type radiator applied to electronic component | |
| CN213586757U (en) | Heat sink | |
| Kamboj et al. | CFD simulation of heat transfer enhancement by plain and curved winglet type vertex generators with punched holes | |
| CN201892182U (en) | Turbulence radiator | |
| CN109548381B (en) | Radiator with radial fins with protrusions on surface | |
| CN207340395U (en) | A kind of surface inserting heat-pipe air-cooling radiator | |
| CN210292947U (en) | Heat exchanger | |
| CN208589434U (en) | A kind of flexible membrane radiator | |
| CN201892188U (en) | Fold-line-shaped turbulence radiator | |
| CN102444876A (en) | Turbulence radiator | |
| CN201892184U (en) | Curved turbulent flow radiator | |
| CN201135010Y (en) | Heat radiation fin | |
| CN2580603Y (en) | Curved fin type heat radiator | |
| CN115036869B (en) | Heat abstractor of intensive bus duct | |
| CN203734989U (en) | Variable-scale ribbed radiator | |
| CN205071596U (en) | Be applied to electronic components's type of weaving radiator | |
| CN208572659U (en) | A kind of heat sinking aluminium sheet | |
| CN219269413U (en) | Electronic equipment heat radiation assembly | |
| CN213126914U (en) | High-strength shock-absorbing radiating fin | |
| CN216362272U (en) | Motor heat dissipation casing | |
| CN209524779U (en) | A kind of circulative convection radiator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |