US20210278140A1 - Heat pipe structure - Google Patents
Heat pipe structure Download PDFInfo
- Publication number
- US20210278140A1 US20210278140A1 US16/820,745 US202016820745A US2021278140A1 US 20210278140 A1 US20210278140 A1 US 20210278140A1 US 202016820745 A US202016820745 A US 202016820745A US 2021278140 A1 US2021278140 A1 US 2021278140A1
- Authority
- US
- United States
- Prior art keywords
- shaft
- trench
- sleeve tube
- peripheral edge
- heat pipe
- 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.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0275—Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0233—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes the conduits having a particular shape, e.g. non-circular cross-section, annular
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0208—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes using moving tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
- F28D15/046—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure characterised by the material or the construction of the capillary structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F5/00—Elements specially adapted for movement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/004—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for engine or machine cooling systems
Definitions
- the present invention is related to a heat pipe structure.
- an O-ring is used to seal a gap of the rotating shaft structure in order to avoid the leakage of lubricating fluid.
- a heat pipe is used to conduct heat.
- the heat pipe is usually made of a material with great thermal conductivity, and heat pipe is in contact with a heat source to dissipate heat. Since the overall structural strength of the heat pipe is limited for the purpose of heat dissipation, it is not convenient to use an O-ring for sealing when the heat pipe is fixed in contact with the heat source.
- an object of the present invention is to provide a heat pipe structure that does not damage heat pipe itself while maintaining contact with the shaft connected to the heat source and keeping the heat pipe internally sealed.
- the heat pipe structure includes a sleeve tube and a shaft.
- the sleeve tube includes an inner wall.
- the sleeve tube has a trench on the inner wall.
- the trench is at an outlet end of the sleeve tube.
- the trench extends in a circumferential direction of the sleeve tube.
- the shaft is connected to the heat source.
- the shaft is inserted into the sleeve tube from the outlet end such that the shaft is rotatable relative to the sleeve tube.
- the trench surrounds the shaft.
- the sleeve tube is hollow.
- the sleeve tube further includes an outer wall.
- the inner wall and the outer wall define a chamber for accommodating a heat transfer fluid.
- the trench is connected to the inner wall by a first peripheral edge and a second peripheral edge.
- the second peripheral edge is closer to the outlet end than the first peripheral edge.
- the first peripheral edge and the second peripheral edge are parallel to each other and extend along a circumferential direction of the sleeve tube.
- the trench is recessed between the first peripheral edge and the second peripheral edge.
- the trench includes an inclined surface, and the inclined surface extends at an angle from one of the first peripheral edge and the second peripheral edge.
- the trench further includes a vertical surface.
- the vertical surface is perpendicular to the inner wall.
- the inner wall extends from one of the first peripheral edge and the second peripheral edge, and the vertical surface and the inclined surface form the trench.
- the heat pipe structure further includes a lubricating layer between the trench and the shaft.
- the lubricating layer fills a gap between the shaft and the sleeve tube to seal the inside of the sleeve tube.
- a part of the lubricating layer is accommodated in the trench and in contact with the shaft. Another part of the lubricating layer is located between the shaft and a part of the inner wall outside the trench.
- the lubricating layer has a first liquid surface and a second liquid surface.
- the first liquid surface is opposite to the second liquid surface.
- the first liquid surface and the second liquid surface have edges connected to the shaft.
- the first liquid surface is located between the inner wall outside the trench and the shaft.
- the second liquid surface is located between the inclined surface and the shaft.
- the inclined surface is configured to extend from the second peripheral edge toward the first peripheral edge.
- the second liquid surface is configured to protrude toward the outlet end.
- the first liquid surface is configured to protrude along a direction opposite to the outlet end.
- the inclined surface is configured to extend from the first peripheral edge toward the second peripheral edge. Both the first liquid surface and the second liquid surface are recessed toward the inside of the lubricating layer.
- the inner wall of the sleeve tube has a circumferentially extending trench.
- the trench has an inclined surface, and the lubricating layer can be filled between the trench on the inner wall and the shaft connected to the heat source.
- the lubricating layer can seal the inside of the sleeve tube without damaging the heat pipe structure due to capillary force.
- FIG. 1 is a perspective view of a sleeve tube of a heat pipe structure inserted by a shaft connected to a heat source according to one embodiment of the present invention
- FIG. 2 is a cross-section of a sleeve tube of a heat pipe structure according to one embodiment of the present invention
- FIG. 3 is a cross-sectional view of a sleeve tube of a heat pipe structure inserted by a shaft connected to a heat source according to one embodiment of the present invention
- FIG. 4 is a partial enlarged view of FIG. 3 , in which a lubricating layer is filled between a trench and the shaft connected to the heat source;
- FIG. 5 is a cross-sectional view of a sleeve tube of another heat pipe structure inserted by a shaft connected to a heat source according to one embodiment of the present invention.
- FIG. 6 is a partial enlarged view of FIG. 5 , in which a lubricating layer is filled between a trench and the shaft connected to the heat source.
- phrases “comprising,” “includes,” “provided,” and the like, used in the context are all open-ended terms, i.e. including but not limited to.
- FIG. 1 is a perspective view of a sleeve tube 110 of a heat pipe structure 100 inserted by a shaft 180 connected to a heat source 200 according to one embodiment of the present invention.
- the heat pipe structure 100 includes a sleeve tube 110 and a shaft 180 connected to the heat source.
- the shaft 180 inserts into the sleeve tube 110 of the heat pipe structure 100 from an outlet end of the sleeve tube 110 .
- the shaft 180 connected to the heat source 200 is one end of a heat conduction pipe.
- the heat conduction pipe can be a metal tube made by Cooper with good thermal conductivity, and the heat conduction pipe can be used to conduct heat generated by heat source.
- the shaft 180 is inserted into the sleeve tube 110 from the outlet end such that the shaft 180 is rotatable relative to the sleeve tube 110 , and the shaft 180 can be configured inside the sleeve tube 110 and rotate in a circumferential direction D of the sleeve tube 110 .
- the shaft 180 connected to the heat source 200 and the sleeve tube 110 form a rotating shaft structure. This allows the shaft 180 connected to the heat source 200 to have a degree of freedom of rotation at the connection point with the heat pipe structure 100 , which can be combined with other rotating shaft devices of an electronic device.
- FIG. 2 is a cross-section of a sleeve tube 110 of a heat pipe structure 100 according to one embodiment of the present invention, and FIG. 2 illustrates the detail structure of the sleeve tube 110 of the heat pipe structure 100 .
- the heat source 200 is not shown in FIG. 2 .
- the sleeve tube 110 includes an inner wall 120 and an outer wall 150 , and the inner wall 120 and the outer wall 150 form a hollow chamber 160 for accommodating a heat transfer fluid.
- the heat transfer fluid is used to conduct generated heat.
- the heat transfer fluid is not shown in FIG. 2 .
- the shaft 180 connected to the heat source 200 is configured in the sleeve tube 110 , the shaft 180 approaches or even partially in contact with the inner wall 120 , so that the heat generated by the heat source 200 can be transferred to the heat transfer fluid in the chamber 160 , prompting the heat transfer fluid flows or has phase change, thereby taking away the heat generated by the heat source 200 and achieving the purpose of heat dissipation.
- the sleeve tube 110 of the heat pipe structure 100 cannot be hollow.
- the sleeve tube 110 can be made by other material having capability of conducting heat.
- a plurality of trenches 130 is located on the inner wall 120 of the sleeve tube 110 .
- Four trenches 130 are shown in FIG. 2 , but the number of the trenches 130 is not limited by this figure.
- the sleeve tube 110 of the heat pipe structure 100 has an outlet end, and the shaft 180 connected to the heat source inserts into the sleeve tube 110 from the outlet end.
- the trenches 130 are configured at the outlet end of the sleeve tube 110 .
- each trench 130 extends along the circumferential direction D.
- the circumferential direction D refers a direction of rotation along the central axis of the sleeve tube 120 (e.g. clockwise direction or counter-clockwise direction along the central axis of the sleeve tube 120 ). Therefore, once the shaft 180 connected to the heat source 200 inserts into the sleeve tube from the outlet end to form a rotating shaft structure, the trenches 130 can surround the shaft 180 in the circumferential direction D.
- the purpose that the trenches 130 surround the shaft is to seal the inside of the sleeve tube 110 , and the shaft 180 and the sleeve tube 110 of the heat pipe structure 110 can be fixed to form a stable rotating shaft structure. For details, see the following discussion.
- a plurality of trenches 130 is located on the inner wall 120 of the sleeve tube 110 , and the trenches 130 extend along the circumferential direction and are parallel to each other.
- the extending direction of each trench 130 can be different, and the extending directions of the trenches 130 are not parallel to each other. In that case, it is only necessary to keep the extending direction of each trench 130 substantially along the circumferential direction D, and the trenches 130 do not intersect with each other.
- the shape of the trench 130 is V-shaped, and the detail structure of the trench 130 refers to following discussion.
- the chamber 160 further has capillary structures, which is not shown in FIG. 2 for the sake of simplicity.
- the capillary structures in the chamber 160 please refer to the subsequent description of FIG. 3 .
- FIG. 3 is a cross-sectional view of a sleeve tube 110 of a heat pipe structure 100 inserted by a shaft 180 connected to a heat source 200 according to one embodiment of the present invention.
- FIG. 4 is a partial enlarged view of FIG. 3 , in which a lubricating layer 170 is filled between a trench 130 and the shaft 180 connected to the heat source 200 .
- the shaft 180 connected to the heat source 200 inserts the sleeve tube 110 of the heat pipe structure 100 from the outlet end, such that the trenches 130 approach and surround the shaft 180 .
- Detail structure of the trench 130 in region R 1 of FIG. 3 is illustrated in FIG. 4 .
- capillary structures are configured inside the chamber 160 .
- the capillary structures can further assist the flow of heat transfer fluid.
- the capillary structures are configured at surface of the inner wall 120 and the outer wall 150 inside the chamber 160 .
- the heat transfer fluid can flow on the inner wall 120 and the outer wall 150 with capillary structures inside the chamber 160 , and the heat transfer fluid can flow in the center of the chamber 160 after the heat transfer fluid have phase change.
- the trenches 130 are recessed from the inner wall 120 .
- the trench 130 has a first peripheral edge 140 and a second peripheral edge 145 , and the trench 130 is connected to the inner wall 120 by the first peripheral edge 140 and the second peripheral edge 145 .
- the second peripheral edge 145 is closer to the outlet end than the first peripheral edge 140 .
- the first peripheral edge 140 and the second peripheral edge 145 are parallel to each other and extend along the circumferential direction D.
- the trench 130 is recessed between the first peripheral edge 140 and the second peripheral edge 145 .
- the shape of the trench 130 on the inner wall 120 is a strip with a constant width.
- the shape of the trench 130 is V-shaped.
- the trench 130 further includes an inclined surface 133 and a vertical surface 136 , and the inclined surface 133 and the vertical surface 136 form the V-shaped trench 130 .
- gaps between the inner wall 120 , the trenches 130 and the shaft 180 connected to the heat source 200 can be filled by a lubricating layer 170 , and the lubricating layer 170 seals the inside opposite to the outlet end of the sleeve tube 110 .
- the material of the lubricating layer 170 includes lubricating oil or other lubricating fluid.
- a part of the lubricating layer 170 is located between the trench 130 and the shaft 180 connected to the heat source 200 , and another part of the lubricating layer 170 is located between a portion beyond the trench 130 of the inner wall 120 and the shaft 180 .
- the lubricating layer 170 includes a first liquid surface 171 and a second liquid surface 172 , and the first liquid surface 171 is opposite to the second liquid surface 172 .
- the first liquid surface 171 and the second liquid surface 172 have edges connected to the shaft 180 .
- the first liquid surface is located between the inner wall 120 and the shaft 180
- the second liquid surface 172 is located between the trench 130 and the shaft 180 . That is, the second liquid surface is in contact with the inclined surface 133 , and the second liquid surface 172 is located between the inclined surface 133 and the shaft 180 .
- the configuration of the inclined surface 133 is related to the surface tension of the lubricating layer 170 .
- the first liquid surface 171 is configured to protrude toward the inside of the sleeve tube 110
- the second liquid surface 172 is configured to protrude toward the outlet end.
- the first liquid surface 171 is configured to protrude along a direction opposite to the outlet end. It related to the surface tension of the lubricating layer 170 .
- the inclined surface 133 is configured to extend from the second peripheral edge 145 toward the first peripheral edge 140 at an angle ⁇ 1 , so that the inclined surface 133 is connected to the vertical surface 136 extending vertically from the first peripheral edge 140 , and the inclined surface 133 and the vertical surface 136 form the V-shaped trench 130 .
- the surface tension between the lubricating layer 170 and the inner wall 120 can fix the lubricating layer 170 between the sleeve tube 110 and the shaft 180 .
- the angle ⁇ 1 is between the first liquid surface 171 and the inner wall 120
- the same angle ⁇ 1 is between the second liquid surface 172 and the inclined surface 133 .
- the surface tension is proportional to the circumference of the liquid surface. Since the depth of the trench 130 is much smaller than the width of the sleeve tube 110 , the perimeter of the inner wall 120 in contact with the first liquid surface 171 and the perimeter of the inclined surface 120 in contact with the second liquid surface 172 are approximately the same, and the surface tension F 1 corresponding to the first liquid surface 171 and the surface tension F 2 of the second liquid surface 172 are approximately the same.
- the axial component refers to a component of the surface tension in the axial direction in which the sleeve tube 110 extends.
- the angle between the surface tension F 1 of the first liquid surface 171 and the axial direction in which the sleeve tube 110 extends is ⁇ 1
- the angle between the surface tension F 2 of the second liquid surface 172 and the axial direction in which the sleeve tube 110 extends is ⁇ 1 + ⁇ 1 .
- the magnitude of the axial component T 1 of the surface tension F 1 is proportional to the cosine function cos(al), and the magnitude of the axial component T 2 of the surface tension F 2 is proportional to the cosine function cos( ⁇ 1 + ⁇ 1 ).
- the magnitude of the cosine function is basically inversely proportional to the angle when the angle is less than 90 degrees. Therefore, in this embodiment, the axial component T 1 of the surface tension F 1 is greater than the axial component T 2 of the surface tension F 2 .
- the sleeve tube 110 of the heat pipe structure 100 and the shaft 180 does not have additional friction, thereby preventing the sleeve tube 110 from being damaged due to insufficient structural rigidity when rotating.
- the inclined surface 133 of the trench 130 is configured to extend from the first peripheral edge 140 toward the second peripheral edge 145 at an angle ⁇ 2 , so that the inclined surface 133 is connected to the vertical surface 136 extending vertically from the second peripheral edge 144 , and the inclined surface 133 and the vertical surface 136 form the V-shaped trench 130 .
- Both the first liquid surface 171 ′ and the second liquid surface 172 ′ of the lubricating layer 170 ′ are recessed toward the inside of the lubricating layer 170 ′.
- the angle between the first liquid surface 171 ′ and the inner wall 120 is ⁇ 2
- the angle between the second liquid surface 172 ′ and the inclined surface 133 is ⁇ 2
- the angle between the inclined surface 133 and the axial direction in which the sleeve tube 110 extends is ⁇ 2 .
- the angle ⁇ 2 is 30 degrees
- the angle ⁇ 2 is also 30 degrees.
- the axial component T 1 ′ of the surface tension F 1 ′ is approximately proportional to the cosine 30 degrees
- the axial component T 2 ′ of F 2 ′ is approximately proportional to the cosine 60 degrees
- the axial component T 1 ′ is greater than the 1.5 times axial component T 2 ′.
- the heat pipe structure of the present invention includes a sleeve tube and a shaft connected to a heat source, and the sleeve tube and the shaft form a rotating shaft structure.
- An extended trench is provided on the inner wall of the sleeve tube, and the trench has an inclined surface, so that the lubricating layer filled between the trench and the shaft cannot leak out from the outlet end of the sleeve tube due to capillary force caused by the lubricating layer. Accordingly, the inside of the sleeve tube is sealed.
- the lubricating layer remaining inside the sleeve tube can also lubricate the rotating shaft structure without damaging the shaft and sleeve of the heat pipe structure.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sliding-Contact Bearings (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
Description
- This application claims priority to China Application Serial Number 202010144082.2, filed Mar. 4, 2020, which are herein incorporated by reference.
- The present invention is related to a heat pipe structure.
- For a traditional rotating shaft structure, an O-ring is used to seal a gap of the rotating shaft structure in order to avoid the leakage of lubricating fluid. However, there is friction between the O-ring and the rotating shaft, and the rotating shaft structure is easily damage because of the insufficient rigidity.
- A heat pipe is used to conduct heat. The heat pipe is usually made of a material with great thermal conductivity, and heat pipe is in contact with a heat source to dissipate heat. Since the overall structural strength of the heat pipe is limited for the purpose of heat dissipation, it is not convenient to use an O-ring for sealing when the heat pipe is fixed in contact with the heat source.
- Accordingly, how to provide a solution to solve the aforementioned problems becomes an important issue to be solved by those in the industry.
- To achieve the above object, an object of the present invention is to provide a heat pipe structure that does not damage heat pipe itself while maintaining contact with the shaft connected to the heat source and keeping the heat pipe internally sealed.
- One aspect of the present invention is related to a heat pipe structure used for cooling a heat source. The heat pipe structure includes a sleeve tube and a shaft. The sleeve tube includes an inner wall. The sleeve tube has a trench on the inner wall. The trench is at an outlet end of the sleeve tube. The trench extends in a circumferential direction of the sleeve tube. The shaft is connected to the heat source. The shaft is inserted into the sleeve tube from the outlet end such that the shaft is rotatable relative to the sleeve tube. The trench surrounds the shaft.
- In one or more embodiments of the present invention, the sleeve tube is hollow. The sleeve tube further includes an outer wall. The inner wall and the outer wall define a chamber for accommodating a heat transfer fluid.
- In one or more embodiments of the present invention, the trench is connected to the inner wall by a first peripheral edge and a second peripheral edge. The second peripheral edge is closer to the outlet end than the first peripheral edge. The first peripheral edge and the second peripheral edge are parallel to each other and extend along a circumferential direction of the sleeve tube. The trench is recessed between the first peripheral edge and the second peripheral edge.
- In some embodiments, the trench includes an inclined surface, and the inclined surface extends at an angle from one of the first peripheral edge and the second peripheral edge.
- In some embodiments, the trench further includes a vertical surface. The vertical surface is perpendicular to the inner wall. The inner wall extends from one of the first peripheral edge and the second peripheral edge, and the vertical surface and the inclined surface form the trench.
- In some embodiments, the heat pipe structure further includes a lubricating layer between the trench and the shaft. The lubricating layer fills a gap between the shaft and the sleeve tube to seal the inside of the sleeve tube.
- In some embodiments, a part of the lubricating layer is accommodated in the trench and in contact with the shaft. Another part of the lubricating layer is located between the shaft and a part of the inner wall outside the trench.
- In some embodiments, the lubricating layer has a first liquid surface and a second liquid surface. The first liquid surface is opposite to the second liquid surface. The first liquid surface and the second liquid surface have edges connected to the shaft. The first liquid surface is located between the inner wall outside the trench and the shaft. The second liquid surface is located between the inclined surface and the shaft.
- In some embodiments, the inclined surface is configured to extend from the second peripheral edge toward the first peripheral edge. The second liquid surface is configured to protrude toward the outlet end. The first liquid surface is configured to protrude along a direction opposite to the outlet end.
- In some embodiments, the inclined surface is configured to extend from the first peripheral edge toward the second peripheral edge. Both the first liquid surface and the second liquid surface are recessed toward the inside of the lubricating layer.
- In summary, for the heat pipe structure of the present invention, the inner wall of the sleeve tube has a circumferentially extending trench. The trench has an inclined surface, and the lubricating layer can be filled between the trench on the inner wall and the shaft connected to the heat source. The lubricating layer can seal the inside of the sleeve tube without damaging the heat pipe structure due to capillary force.
- It is to be understood that both the foregoing general description and the following detailed description are by examples, and are intended to provide further explanation of the invention as claimed.
- In order to make the above and other objects, features, advantages, and embodiments of the present invention more comprehensible, the description of the drawings is as follows:
-
FIG. 1 is a perspective view of a sleeve tube of a heat pipe structure inserted by a shaft connected to a heat source according to one embodiment of the present invention; -
FIG. 2 is a cross-section of a sleeve tube of a heat pipe structure according to one embodiment of the present invention; -
FIG. 3 is a cross-sectional view of a sleeve tube of a heat pipe structure inserted by a shaft connected to a heat source according to one embodiment of the present invention; -
FIG. 4 is a partial enlarged view ofFIG. 3 , in which a lubricating layer is filled between a trench and the shaft connected to the heat source; -
FIG. 5 is a cross-sectional view of a sleeve tube of another heat pipe structure inserted by a shaft connected to a heat source according to one embodiment of the present invention; and -
FIG. 6 is a partial enlarged view ofFIG. 5 , in which a lubricating layer is filled between a trench and the shaft connected to the heat source. - The following embodiments are disclosed with accompanying diagrams for detailed description. For illustration clarity, many details of practice are explained in the following descriptions. However, it should be understood that these details of practice do not intend to limit the present invention. That is, these details of practice are not necessary in parts of embodiments of the present invention. Furthermore, for simplifying the drawings, some of the conventional structures and elements are shown with schematic illustrations. Also, the same labels may be regarded as the corresponding components in the different drawings unless otherwise indicated. The drawings are drawn to clearly illustrate the connection between the various components in the embodiments, and are not intended to depict the actual sizes of the components.
- In addition, terms used in the specification and the claims generally have the usual meaning as each terms are used in the field, in the context of the disclosure and in the context of the particular content unless particularly specified. Some terms used to describe the disclosure are to be discussed below or elsewhere in the specification to provide additional guidance related to the description of the disclosure to specialists in the art.
- Phrases “first,” “second,” etc., are solely used to separate the descriptions of elements or operations with same technical terms, not intended to be the meaning of order or to limit the invention.
- Secondly, phrases “comprising,” “includes,” “provided,” and the like, used in the context are all open-ended terms, i.e. including but not limited to.
- Further, in the context, “a” and “the” can be generally referred to one or more unless the context particularly requires. It will be further understood that phrases “comprising,” “includes,” “provided,” and the like, used in the context indicate the characterization, region, integer, step, operation, element and/or component it stated, but not exclude descriptions it stated or additional one or more other characterizations, regions, integers, steps, operations, elements, components and/or groups thereof.
- Please refer to
FIG. 1 .FIG. 1 is a perspective view of asleeve tube 110 of aheat pipe structure 100 inserted by ashaft 180 connected to aheat source 200 according to one embodiment of the present invention. Theheat pipe structure 100 includes asleeve tube 110 and ashaft 180 connected to the heat source. Theshaft 180 inserts into thesleeve tube 110 of theheat pipe structure 100 from an outlet end of thesleeve tube 110. For example, theshaft 180 connected to theheat source 200 is one end of a heat conduction pipe. The heat conduction pipe can be a metal tube made by Cooper with good thermal conductivity, and the heat conduction pipe can be used to conduct heat generated by heat source. Therefore, theshaft 180 is inserted into thesleeve tube 110 from the outlet end such that theshaft 180 is rotatable relative to thesleeve tube 110, and theshaft 180 can be configured inside thesleeve tube 110 and rotate in a circumferential direction D of thesleeve tube 110. In other words, theshaft 180 connected to theheat source 200 and thesleeve tube 110 form a rotating shaft structure. This allows theshaft 180 connected to theheat source 200 to have a degree of freedom of rotation at the connection point with theheat pipe structure 100, which can be combined with other rotating shaft devices of an electronic device. - Please refer to
FIG. 2 .FIG. 2 is a cross-section of asleeve tube 110 of aheat pipe structure 100 according to one embodiment of the present invention, andFIG. 2 illustrates the detail structure of thesleeve tube 110 of theheat pipe structure 100. For the purpose of simple explanation, theheat source 200 is not shown inFIG. 2 . - As shown in
FIG. 2 , in this embodiment, thesleeve tube 110 includes aninner wall 120 and anouter wall 150, and theinner wall 120 and theouter wall 150 form ahollow chamber 160 for accommodating a heat transfer fluid. The heat transfer fluid is used to conduct generated heat. For the purpose of simple explanation, the heat transfer fluid is not shown inFIG. 2 . In some embodiment, once theshaft 180 connected to theheat source 200 is configured in thesleeve tube 110, theshaft 180 approaches or even partially in contact with theinner wall 120, so that the heat generated by theheat source 200 can be transferred to the heat transfer fluid in thechamber 160, prompting the heat transfer fluid flows or has phase change, thereby taking away the heat generated by theheat source 200 and achieving the purpose of heat dissipation. In some embodiments, thesleeve tube 110 of theheat pipe structure 100 cannot be hollow. Thesleeve tube 110 can be made by other material having capability of conducting heat. - As shown in
FIG. 2 , a plurality oftrenches 130 is located on theinner wall 120 of thesleeve tube 110. Fourtrenches 130 are shown inFIG. 2 , but the number of thetrenches 130 is not limited by this figure. - Refer to
FIG. 1 , thesleeve tube 110 of theheat pipe structure 100 has an outlet end, and theshaft 180 connected to the heat source inserts into thesleeve tube 110 from the outlet end. InFIG. 2 , thetrenches 130 are configured at the outlet end of thesleeve tube 110. - As shown in
FIG. 2 , eachtrench 130 extends along the circumferential direction D. The circumferential direction D refers a direction of rotation along the central axis of the sleeve tube 120 (e.g. clockwise direction or counter-clockwise direction along the central axis of the sleeve tube 120). Therefore, once theshaft 180 connected to theheat source 200 inserts into the sleeve tube from the outlet end to form a rotating shaft structure, thetrenches 130 can surround theshaft 180 in the circumferential direction D. The purpose that thetrenches 130 surround the shaft is to seal the inside of thesleeve tube 110, and theshaft 180 and thesleeve tube 110 of theheat pipe structure 110 can be fixed to form a stable rotating shaft structure. For details, see the following discussion. - In this embodiment, as shown in
FIG. 2 , a plurality oftrenches 130 is located on theinner wall 120 of thesleeve tube 110, and thetrenches 130 extend along the circumferential direction and are parallel to each other. In some embodiments, the extending direction of eachtrench 130 can be different, and the extending directions of thetrenches 130 are not parallel to each other. In that case, it is only necessary to keep the extending direction of eachtrench 130 substantially along the circumferential direction D, and thetrenches 130 do not intersect with each other. - As shown in
FIG. 2 , in this embodiment, the shape of thetrench 130 is V-shaped, and the detail structure of thetrench 130 refers to following discussion. In addition, thechamber 160 further has capillary structures, which is not shown inFIG. 2 for the sake of simplicity. For the capillary structures in thechamber 160, please refer to the subsequent description ofFIG. 3 . - Please refer to
FIG. 3 andFIG. 4 .FIG. 3 is a cross-sectional view of asleeve tube 110 of aheat pipe structure 100 inserted by ashaft 180 connected to aheat source 200 according to one embodiment of the present invention.FIG. 4 is a partial enlarged view ofFIG. 3 , in which alubricating layer 170 is filled between atrench 130 and theshaft 180 connected to theheat source 200. - In
FIG. 3 , theshaft 180 connected to theheat source 200 inserts thesleeve tube 110 of theheat pipe structure 100 from the outlet end, such that thetrenches 130 approach and surround theshaft 180. Detail structure of thetrench 130 in region R1 ofFIG. 3 is illustrated inFIG. 4 . - In
FIG. 3 , capillary structures are configured inside thechamber 160. When the heat transfer fluid is contained in thechamber 160, the capillary structures can further assist the flow of heat transfer fluid. Specifically, the capillary structures are configured at surface of theinner wall 120 and theouter wall 150 inside thechamber 160. The heat transfer fluid can flow on theinner wall 120 and theouter wall 150 with capillary structures inside thechamber 160, and the heat transfer fluid can flow in the center of thechamber 160 after the heat transfer fluid have phase change. - As shown in
FIG. 4 , in this embodiment, thetrenches 130 are recessed from theinner wall 120. Thetrench 130 has a firstperipheral edge 140 and a second peripheral edge 145, and thetrench 130 is connected to theinner wall 120 by the firstperipheral edge 140 and the second peripheral edge 145. The second peripheral edge 145 is closer to the outlet end than the firstperipheral edge 140. Refer toFIG. 2 andFIG. 4 , in this embodiment, the firstperipheral edge 140 and the second peripheral edge 145 are parallel to each other and extend along the circumferential direction D. In other word, thetrench 130 is recessed between the firstperipheral edge 140 and the second peripheral edge 145. The shape of thetrench 130 on theinner wall 120 is a strip with a constant width. - As mentioned above, the shape of the
trench 130 is V-shaped. Refer toFIG. 4 , in this embodiment, thetrench 130 further includes aninclined surface 133 and avertical surface 136, and theinclined surface 133 and thevertical surface 136 form the V-shapedtrench 130. - Further, as shown in
FIG. 4 , in this embodiment, gaps between theinner wall 120, thetrenches 130 and theshaft 180 connected to theheat source 200 can be filled by alubricating layer 170, and thelubricating layer 170 seals the inside opposite to the outlet end of thesleeve tube 110. The material of thelubricating layer 170 includes lubricating oil or other lubricating fluid. When theshaft 180 connected to theheat source 200 and thesleeve tube 110 of theheat pipe structure 200 form the rotating shaft structure, thelubricating layer 170 maintains the sealing of the inside of thesleeve tube 110 to fix thesleeve tube 110 and theshaft 180 connected to theheat source 200. In addition, thelubricating layer 170 also helps theshaft 180 connected to theheat source 200 to rotate inside thesleeve tube 110. - In
FIG. 4 , with the firstperipheral edge 140 as a boundary, a part of thelubricating layer 170 is located between thetrench 130 and theshaft 180 connected to theheat source 200, and another part of thelubricating layer 170 is located between a portion beyond thetrench 130 of theinner wall 120 and theshaft 180. - Specifically, the
lubricating layer 170 includes a firstliquid surface 171 and a secondliquid surface 172, and the firstliquid surface 171 is opposite to the secondliquid surface 172. The firstliquid surface 171 and the secondliquid surface 172 have edges connected to theshaft 180. As shown inFIG. 4 , in this embodiment, the first liquid surface is located between theinner wall 120 and theshaft 180, and the secondliquid surface 172 is located between thetrench 130 and theshaft 180. That is, the second liquid surface is in contact with theinclined surface 133, and the secondliquid surface 172 is located between theinclined surface 133 and theshaft 180. - Further, in this invention, the configuration of the
inclined surface 133 is related to the surface tension of thelubricating layer 170. - In this embodiment, the first
liquid surface 171 is configured to protrude toward the inside of thesleeve tube 110, and the secondliquid surface 172 is configured to protrude toward the outlet end. In other words, the firstliquid surface 171 is configured to protrude along a direction opposite to the outlet end. It related to the surface tension of thelubricating layer 170. For the case where the firstliquid surface 171 and the secondliquid surface 172 are convex, in this embodiment, theinclined surface 133 is configured to extend from the second peripheral edge 145 toward the firstperipheral edge 140 at an angle β1, so that theinclined surface 133 is connected to thevertical surface 136 extending vertically from the firstperipheral edge 140, and theinclined surface 133 and thevertical surface 136 form the V-shapedtrench 130. - The surface tension between the
lubricating layer 170 and theinner wall 120 can fix thelubricating layer 170 between thesleeve tube 110 and theshaft 180. As shown inFIG. 4 , the angle α1 is between the firstliquid surface 171 and theinner wall 120, and the same angle α1 is between the secondliquid surface 172 and theinclined surface 133. - The surface tension is proportional to the circumference of the liquid surface. Since the depth of the
trench 130 is much smaller than the width of thesleeve tube 110, the perimeter of theinner wall 120 in contact with the firstliquid surface 171 and the perimeter of theinclined surface 120 in contact with the secondliquid surface 172 are approximately the same, and the surface tension F1 corresponding to the firstliquid surface 171 and the surface tension F2 of the secondliquid surface 172 are approximately the same. - However, the position of the
lubricating layer 170 achieves balance according to the axial component of the surface tension. The axial component refers to a component of the surface tension in the axial direction in which thesleeve tube 110 extends. As shown inFIG. 4 , the angle between the surface tension F1 of the firstliquid surface 171 and the axial direction in which thesleeve tube 110 extends is α1 , and the angle between the surface tension F2 of the secondliquid surface 172 and the axial direction in which thesleeve tube 110 extends is α1+β1. In this case, the magnitude of the axial component T1 of the surface tension F1 is proportional to the cosine function cos(al), and the magnitude of the axial component T2 of the surface tension F2 is proportional to the cosine function cos(α1+β1). The magnitude of the cosine function is basically inversely proportional to the angle when the angle is less than 90 degrees. Therefore, in this embodiment, the axial component T1 of the surface tension F1 is greater than the axial component T2 of the surface tension F2. Thelubricating layer 170 shown inFIG. 4 tends to move toward the inside of thesleeve tube 110, and it is less likely to flow out of the outlet end of thesleeve tube 110, so that the gaps between theshaft 180, theinner wall 120 and thetrench 130 can be filled by thelubricating layer 170, and the shaft connected to theheat source 200 and thesleeve tube 110 can be fixed. - Therefore, by providing the
trench 130 filled with thelubricating layer 170, thesleeve tube 110 of theheat pipe structure 100 and theshaft 180 does not have additional friction, thereby preventing thesleeve tube 110 from being damaged due to insufficient structural rigidity when rotating. - Please refer to
FIG. 5 andFIG. 6 .FIG. 5 is a cross-sectional view of asleeve tube 110 of another heat pipe structure inserted by ashaft 180 connected to aheat source 200 according to one embodiment of the present invention.FIG. 6 is a partial enlarged view ofFIG. 5 , in which alubricating layer 170′ is filled between atrench 130 and theshaft 180 connected to theheat source 200. Detail structure of thetrench 130 in region R2 ofFIG. 5 is illustrated inFIG. 6 . - Similar to
FIG. 3 , there are capillary structures inside thesleeve tube 110 of theheat pipe structure 110. - Compared with the
heat pipe structure 100 inFIG. 3 andFIG. 4 , inFIG. 5 andFIG. 6 , theinclined surface 133 of thetrench 130 is configured to extend from the firstperipheral edge 140 toward the second peripheral edge 145 at an angle β2, so that theinclined surface 133 is connected to thevertical surface 136 extending vertically from the second peripheral edge 144, and theinclined surface 133 and thevertical surface 136 form the V-shapedtrench 130. Both the firstliquid surface 171′ and the secondliquid surface 172′ of thelubricating layer 170′ are recessed toward the inside of thelubricating layer 170′. - Therefore, as shown in
FIG. 6 , the angle between the surface tension F1′ of the firstliquid surface 171′ and the axial direction in which thesleeve tube 110 extends is α2, and the angle between the surface tension F2′ of the secondliquid surface 172′ and the axial direction in which thesleeve tube 110 extends is α2+β2. In this case, the magnitude of the axial component T1′ of the surface tension F1′ is proportional to the cosine function cos(a2), and the magnitude of the axial component T2′ of the surface tension F2′ is proportional to the cosine function cos(α2+β2). The axial component T1′ of the surface tension F1′ is greater than the axial component T2′ of the surface tension F2′, so that lubricatinglayer 170′ tends to move toward the inside of thesleeve tube 110. - The angle between the first
liquid surface 171′ and theinner wall 120 is α2, the angle between the secondliquid surface 172′ and theinclined surface 133 is α2, and the angle between theinclined surface 133 and the axial direction in which thesleeve tube 110 extends is β2. In a specific example, the angle α2 is 30 degrees, and the angle β2 is also 30 degrees. In this case, the axial component T1′ of the surface tension F1′ is approximately proportional to the cosine 30 degrees, and the axial component T2′ of F2′ is approximately proportional to the cosine 60 degrees, then the axial component T1′ is greater than the 1.5 times axial component T2′. - In summary, the heat pipe structure of the present invention includes a sleeve tube and a shaft connected to a heat source, and the sleeve tube and the shaft form a rotating shaft structure. An extended trench is provided on the inner wall of the sleeve tube, and the trench has an inclined surface, so that the lubricating layer filled between the trench and the shaft cannot leak out from the outlet end of the sleeve tube due to capillary force caused by the lubricating layer. Accordingly, the inside of the sleeve tube is sealed. The lubricating layer remaining inside the sleeve tube can also lubricate the rotating shaft structure without damaging the shaft and sleeve of the heat pipe structure.
- Although the present invention has been described in considerable detail with reference to certain embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims.
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010144082.2A CN113357944B (en) | 2020-03-04 | 2020-03-04 | Heat pipe structure |
CN202010144082.2 | 2020-03-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20210278140A1 true US20210278140A1 (en) | 2021-09-09 |
US11131510B1 US11131510B1 (en) | 2021-09-28 |
Family
ID=77523593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/820,745 Active 2040-04-23 US11131510B1 (en) | 2020-03-04 | 2020-03-17 | Heat pipe structure |
Country Status (2)
Country | Link |
---|---|
US (1) | US11131510B1 (en) |
CN (1) | CN113357944B (en) |
Family Cites Families (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4345642A (en) * | 1980-12-24 | 1982-08-24 | Thermacore, Inc. | Articulated heat pipes |
JPH04151495A (en) * | 1990-10-15 | 1992-05-25 | Toshiba Corp | Connecting structure for heating pipe |
US5770906A (en) * | 1995-06-13 | 1998-06-23 | Sae Magnetics (H.K.) Ltd. | Compact electric motor construction employing fluid bearings |
US5796581A (en) * | 1997-07-30 | 1998-08-18 | International Business Machines Corporation | Rotational joint for hinged heat pipe cooling of a computer |
US5847925A (en) * | 1997-08-12 | 1998-12-08 | Compaq Computer Corporation | System and method for transferring heat between movable portions of a computer |
US6097596A (en) * | 1998-02-12 | 2000-08-01 | International Business Machines Corporation | Portable computer rotational heat pipe heat transfer |
US6125035A (en) * | 1998-10-13 | 2000-09-26 | Dell Usa, L.P. | Heat sink assembly with rotating heat pipe |
JP4075170B2 (en) * | 1998-12-17 | 2008-04-16 | 松下電器産業株式会社 | Hydrodynamic bearing device and spindle motor using the same |
US6253836B1 (en) * | 1999-05-24 | 2001-07-03 | Compaq Computer Corporation | Flexible heat pipe structure and associated methods for dissipating heat in electronic apparatus |
TW458501U (en) * | 1999-09-07 | 2001-10-01 | Foxconn Prec Components Co Ltd | Pivotable heat conduction structure |
JP4151495B2 (en) * | 2003-07-16 | 2008-09-17 | 株式会社Ihi | Shield machine |
TWI285081B (en) * | 2005-08-10 | 2007-08-01 | Cooler Master Co Ltd | Heat-dissipation structure and method thereof |
US20090279262A1 (en) * | 2008-05-12 | 2009-11-12 | Meng-Cheng Huang | Heat dissipating structure |
CN101765353B (en) * | 2008-12-25 | 2013-06-05 | 富准精密工业(深圳)有限公司 | Heat-dissipation module |
KR101200597B1 (en) * | 2010-12-24 | 2012-11-12 | 엘지전자 주식회사 | A complex pipe for transferring heat, heat exchanging system and heat exchanger using the same |
CN202091516U (en) * | 2011-06-22 | 2011-12-28 | 重庆智延科技发展有限公司 | Oil seal of automobile hub |
CN103591140A (en) * | 2013-10-12 | 2014-02-19 | 苏州市吴中区曙光铜管厂 | Shaft sleeve |
TWI510902B (en) * | 2013-11-07 | 2015-12-01 | Acer Inc | Heat dissipating assembly and electronic device using the same |
CN204201093U (en) * | 2014-10-31 | 2015-03-11 | 湖北新置密封件有限公司 | A kind of two-way slide ring seal |
JP5970572B1 (en) * | 2015-02-13 | 2016-08-17 | 株式会社フジクラ | Vehicle headlamp |
CN105066753A (en) * | 2015-07-15 | 2015-11-18 | 浙江嘉熙光电设备制造有限公司 | Interlayer radial-direction phase change inhibition heat transfer pipe device and manufacturing method thereof |
JP7035760B2 (en) * | 2017-10-17 | 2022-03-15 | 株式会社デンソー | Cooling system |
TWI737906B (en) * | 2018-04-03 | 2021-09-01 | 尼得科超眾科技股份有限公司 | Heat conductive sleeve structure |
US10932393B2 (en) * | 2019-03-30 | 2021-02-23 | Intel Corporation | Torsional heat pipe |
CN110099553A (en) * | 2019-05-29 | 2019-08-06 | 英业达科技有限公司 | Heat pipe, heat pipe heat and its assembling method |
CN110134214A (en) * | 2019-05-29 | 2019-08-16 | 英业达科技有限公司 | Portable electronic devices |
-
2020
- 2020-03-04 CN CN202010144082.2A patent/CN113357944B/en active Active
- 2020-03-17 US US16/820,745 patent/US11131510B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
US11131510B1 (en) | 2021-09-28 |
CN113357944A (en) | 2021-09-07 |
CN113357944B (en) | 2023-04-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6374961B2 (en) | Sealing device | |
KR102407098B1 (en) | sliding parts | |
JP7242658B2 (en) | Seal ring | |
JP7210565B2 (en) | Seal ring | |
JP6033996B1 (en) | Sealing device | |
JP6423451B2 (en) | Sealing device | |
US20100109252A1 (en) | Oil seal | |
JPH0122509B2 (en) | ||
US2998987A (en) | Teflon lip seal | |
JPWO2014050920A1 (en) | Sliding parts | |
JPWO2020166589A1 (en) | Sliding parts | |
JP2007107547A (en) | Seal ring | |
EP3653914A1 (en) | Sliding parts | |
CN110832235A (en) | Sliding component | |
JPWO2014030742A1 (en) | Sealing device | |
US11131510B1 (en) | Heat pipe structure | |
BR112018077427B1 (en) | MECHANICAL DRY RUN END FACE SEAL | |
TWI723807B (en) | Heat pipe structure | |
US20050147336A1 (en) | Bearing unit and rotary drive apparatus including the bearing unit | |
JPS5943717B2 (en) | heat transfer device | |
JP5985999B2 (en) | Sealing device | |
JP2018096391A (en) | Packing | |
KR102616659B1 (en) | sliding parts | |
CN213655503U (en) | Bearing end cover structure for high-speed bearing | |
JP7166985B2 (en) | Anti-rotation pin for mechanical seal |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: INVENTEC CORPORATION, TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHENG, YI-LUN;YANG, CHIH-KAI;CHIANG, MENG-LUNG;REEL/FRAME:052130/0936 Effective date: 20200310 Owner name: INVENTEC (PUDONG) TECHNOLOGY CORPORATION, CHINA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHENG, YI-LUN;YANG, CHIH-KAI;CHIANG, MENG-LUNG;REEL/FRAME:052130/0936 Effective date: 20200310 |
|
FEPP | Fee payment procedure |
Free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |