TWM578499U - Heat dissipation unit and heat dissipation device thereof - Google Patents

Abstract

A heat dissipating unit and a heat dissipating device thereof, comprising a base and a heat dissipating unit, the base having a first side and a second side, the heat dissipating unit having at least one heat dissipating fin correspondingly disposed on the first side The heat dissipating fins are composed of a first plate body and a second plate body correspondingly closed, and the first and second plate bodies jointly define a plurality of independent flow channels, and the independent flow channels are filled with a working fluid.

Description

Heat sink unit and heat sink

The present invention relates to a heat dissipating unit and a heat dissipating device thereof, and more particularly to a heat dissipating unit and a heat dissipating device thereof which greatly increase heat dissipating efficiency.

Current mobile devices, personal computers, servers, communication chassis or other systems or devices are improved in computing efficiency, and the heat generated by their internal computing units is also increased. Therefore, a heat sink unit is required to assist in heat dissipation. Most of the operators use heat sinks such as heat sinks, heat pipes, and uniform temperature plates to match the fan for auxiliary heat dissipation. When a large area is required for heat dissipation, the heat sink (heat sink) and the heat sink fan are used for forced heat dissipation.

The heat dissipating device (heat sink) commonly used in the industry is composed of a substrate and a plurality of heat dissipating fins, and the heat dissipating fins are disposed on one side of the substrate, due to the improvement of the computing performance of the foregoing devices, the relative Under the condition that the heat generated inside each device is gradually increased, the size of the heat dissipating fins on the substrate must also be relatively increased and increased to obtain a larger and more heat dissipating area to remove the heat inside the devices. However, the heat dissipating fins The heat dissipation efficiency of the sheet gradually decreases as its height increases, resulting in a decrease in the heat dissipation efficiency of the entire heat sink.

As mentioned above, the conventional disadvantages have the following disadvantages:

1. The heat dissipation efficiency is extremely poor; 2. The heat sink is too large.

Therefore, how to solve the above problems and problems in the past, that is, the creators of the case and the relevant manufacturers engaged in this industry are eager to study the direction of improvement.

Therefore, in order to effectively solve the above problems, the main purpose of the present invention is to provide a heat dissipation unit that greatly increases heat dissipation efficiency.

The second objective of this creation is to provide a heat dissipation unit that can greatly reduce the volume of the heat sink.

The second objective of this creation is to provide a heat sink that greatly increases heat dissipation efficiency.

The second objective of this creation is to provide a heat sink that can greatly reduce the volume of the heat sink.

In order to achieve the above objective, the present invention provides a heat dissipating unit having at least one heat dissipating fin, the heat dissipating fin being composed of a first plate body and a second plate body correspondingly closed, and the first and second The plates collectively define a plurality of independent flow channels that are filled with a working fluid.

In order to achieve the above object, the present invention provides a heat dissipating device, comprising a base and a heat dissipating unit, the base having a first side and a second side, the heat dissipating unit having at least one heat dissipating fin correspondingly disposed in the On the first side, the heat dissipating fins are composed of a first plate body and a second plate body, and the first and second plate bodies jointly define a plurality of independent flow channels, and the independent flow channels are Fill a working fluid.

Through the design of the structure of the present invention, by the structural design of the independent flow channel disposed in the heat dissipation fin, when the second side of the base is in contact with a heat source, the heat generated by the heat source is generated by the susceptor The second side is transmitted to the first side and then transferred to the heat dissipation fin, and then heat is transferred into the independent flow path to form a working state of the working fluid in the independent flow path, and the gaseous working fluid The heat is quickly brought away from the other end of the heat source, and after the gaseous working fluid is collected and condensed into a liquid working fluid, the liquid working fluid is returned to the end of the heat source by at least one capillary structure disposed on the inner wall of the independent flow channel. At the fins, a gas-liquid two-phase heat-dissipating fin is formed to achieve a rapid anti-heating effect, and the heat-dissipating efficiency of the heat-dissipating device can be greatly improved.

In an embodiment, when the second side of the susceptor is in contact with the heat source, heat is transferred from the second side to the first side and then transferred to the heat sink fin, and then heat is transferred to the package. In the heat transfer element between the first and second plates, the working fluid in the heat transfer element is circulated in the gas-liquid two-phase inside, so as to improve the heat dissipation efficiency of the heat sink.

In addition, through the independent flow channel structure design in the heat dissipation fins, or through the heat transfer element structure design sandwiched between the first and second plate bodies, the heat dissipation fin volume of the conventional heat dissipation device can also be improved. The problem of extremely low heat dissipation efficiency caused by too large, this design utilizes the structural design of the independent flow channel with gas-liquid two-phase circulation, so that the heat sink has a small volume but does not affect its heat dissipation efficiency and is even better than the conventional heat dissipation. Device.

2‧‧‧heating unit

20‧‧‧ Heat sink fins

201‧‧‧ first board

202‧‧‧Second plate

21‧‧‧Independence runner

210‧‧‧ Groove

211‧‧‧First groove

212‧‧‧Second trough

22‧‧‧Working fluid

23‧‧‧Capillary structure

24‧‧‧ Filling port

25‧‧‧ Ribs

3‧‧‧Base

30‧‧‧ first side

300‧‧‧ slotted

31‧‧‧ second side

4‧‧‧heating device

5‧‧‧heat source

6‧‧‧heat transfer components

1 is a perspective view of a first embodiment of the present heat dissipation unit; FIG. 2 is a perspective cross-sectional view of the first embodiment of the heat dissipation unit; FIG. 3 is a first embodiment of the heat dissipation unit of the present invention 3 is a perspective cross-sectional view of a second embodiment of the heat dissipating unit; FIG. 5 is a perspective cross-sectional view of a second embodiment of the heat dissipating unit; FIG. 3 is a perspective view of a third embodiment of the heat dissipation unit; and FIG. 8 is an exploded perspective view of a fourth embodiment of the heat dissipation unit; FIG. 9 is a perspective view of a fourth embodiment of the heat dissipation unit of the present invention; FIG. 10 is a cross-sectional view of a fourth embodiment of the heat dissipation unit; FIG. 11 is a fifth embodiment of the heat dissipation unit of the present invention FIG. 12 is a perspective view of the first embodiment of the heat sink device; FIG. 13 is a cross-sectional view of the first embodiment of the heat sink device; FIG. 14 is the first heat sink device A cross-sectional view of a second embodiment.

The above object of the present invention, as well as its structural and functional features, will be described in accordance with the preferred embodiments of the drawings.

Please refer to the first, second, and third drawings, which are perspective views and cross-sectional views of the first embodiment of the present heat dissipating unit. As shown, a heat dissipating unit 2 having at least one heat dissipating fin 20, the heat dissipating fin 20 The first plate body 201 and the second plate body 202 are correspondingly closed. In the embodiment, at least one groove 210 is formed on the first plate body 201 (of course, The second plate body 202 is formed as the groove 210. The first plate body 201 is described in the embodiment. In more detail, one of the heat dissipation fins 20 has a groove 210 structure, and the other The plate body is a flat body (having no groove 210 structure), and the first and second plates 201, 202 are correspondingly covered to close the groove 210 to form a plurality of independent flow paths 21, and The independent flow channel 21 is filled with a working fluid 22 for circulation of the gas liquid. In addition, at least one capillary structure 23 (see FIG. 3) or a coating may be further disposed on the inner wall of each of the independent flow channels 21. The structure 23 can be selected as a mesh body or a fiber body or a structure or a groove having a porous property, and the purpose thereof The individual flow increases the effectiveness of the working fluid channel 21 gas-liquid cycle of 22.

The coating may be provided on the inner wall of the independent flow path 21 or the capillary structure 23, one or both of which may be disposed.

4 and 5 are a perspective view and a cross-sectional view of a second embodiment of the present heat dissipating unit. The difference between the second embodiment and the first embodiment is that the first plate body 201 of the heat dissipating fin 20 is At least one first groove portion 211 is formed, and at least one second groove portion 212 is formed on the second plate body 202, that is, a structure in which the first and second plates 201 and 202 are formed with a groove portion. And the first and second plates 201 and 202 are correspondingly closed to close the first and second groove portions 211 and 212 to form the independent flow channel 21, and the independent flow channel 21 is also filled. Working fluid 22.

The manufacturing process of the heat dissipation fins 20 is as follows: First, one of the first and second plates 201 and 202 is machined to form the groove 210, or at the same time The first and second plate bodies 201 and 202 are mechanically formed to form the first and second groove portions 211 and 212, and the machining system forms the groove 210 or the first and second groove portions 211 by press working. 212, the first and second plates 201, 202 are respectively fixed to the cover by welding or other combination, and the groove 210 formed on the first plate 201 or the second plate 202 (or the first The first groove portion 211 formed on the plate body 201 and the second groove portion 212 on the second plate body 202 are not adhered and form the aforementioned independent flow path 21 structure, and then the independent flow path 21 is formed. Vacuuming and simultaneously filling the working fluid 22 from a filling port 24 of the heat sink fin 20 (as shown in FIG. 6) (optionally ammonia or refrigerant or water or hydrocarbon or other compound) a) after the circumference of the groove 210 and the filling port 24 are sealed, the invention is formed. The structure of heat-dissipating fins 20.

In addition, it should be noted that the shape, size, arrangement, and arrangement direction of the groove 210 (or the first and second groove portions 211 and 212) are not particularly limited. For example, the groove 210 may be of different lengths and lengths. Staggeredly formed on the first and second plates 201, 202 (as shown in Fig. 7, which is the third embodiment of the present invention), or the grooves 210 may be arranged side by side (such as 1) or obliquely side by side formed on the first and second plates 201, 202, which can be adjusted according to the needs of the user, therefore, as long as the groove 210 (or first, second The groove portions 211, 212) can make The first and second plates 201 and 202 are covered with each other to form the structural structure of the independent flow channel 21, and are included in the scope of the present invention.

Please refer to Figures 8, 9, and 10, which are perspective exploded views, perspective assembled views, and cross-sectional views of the fourth embodiment of the present heat dissipating unit. The greatest difference between the third embodiment and the first and second embodiments is that At least one heat transfer element 6 is sandwiched between the first and second plates 201 and 202, and the independent flow path 21 is formed inside the heat transfer element 6. In more detail, the heat transfer element 6 can be Is a heat pipe or a heat pipe-like structure or a structural form having a two-phase flow, and the independent flow channel 21 of the heat pipe is filled with the working fluid 22, and the capillary structure 23 can be formed in the heat transfer element 6 And the inner wall or the capillary structure 23 of the independent flow channel 21 may be correspondingly disposed with the coating film, or the inner wall of the independent flow channel 21 and the capillary structure 23 may be simultaneously disposed to increase the working fluid 22 in the independent flow channel. The effectiveness of the gas-liquid cycle within 21.

Referring to FIG. 11 again, it is a perspective view of a fifth embodiment of the heat dissipation unit of the present invention. The difference from the first embodiment is that the heat dissipation fins 20 are not provided with the independent flow path 21 and other parts. Forming a plurality of ribs 25, the ribs 25 are not limited in number and direction (which may be arranged in a lateral or longitudinal direction or staggered), which are adjusted according to the needs of the user, and the structure of the ribs 25 is used for The structural strength of the heat dissipation fins 20 is increased, so that the heat dissipation fins 20 are not easily deformed.

Please refer to FIG. 12, which is a three-dimensional combination diagram of the first embodiment of the heat dissipation device. The heat dissipation device 4 is configured by arranging the heat dissipation unit 2 with a base 3, and the base 3 has a first The side 30 and the second side 31 are formed, and the first side 30 is formed with at least one recess 300. The heat sink fins 20 are correspondingly fixed in the recess 300, and the fixing fins 20 can be selected. It is fixed in the slot 300 by any means such as fitting or riveting or welding or gluing or snapping.

Referring to FIG. 13 again, through the design of the structure, the second side 31 of the pedestal 3 and a heat source 5 are designed by the structural design of the independent flow channel 21 disposed in the heat dissipation fin 20. When in contact, the heat generated by the heat source 5 is transferred from the second side 31 of the base 3 to the first side 30 and then to The heat dissipating fins 20 are then transferred into the independent flow path 21 to make the working fluid 22 in the independent flow path 21 form a gaseous state, and the gaseous working fluid 22 can quickly bring the heat away from the heat source 5 The other end of the gas working fluid 22 is condensed into a liquid working fluid 22 and then passed through a capillary structure 23 disposed on the inner wall of the independent flow path 21 to return the liquid working fluid 22 to the heat radiating fins 20 near one end of the heat source 5. In this way, a heat-dissipating fin 20 of gas-liquid two-phase continuous circulation is formed, which achieves the effect of rapid de-heating, and can greatly improve the heat-dissipating efficiency of the heat-dissipating device 4.

In addition, through the structural design of the independent flow channel 21 in the heat dissipation fin 20 of the present invention, the problem that the heat dissipation fin 20 of the conventional heat dissipation device 4 is too large and the heat dissipation efficiency is extremely poor can be improved. The structural design of the two-phase independent flow channel 21 allows the heat sink 4 to have a small volume but does not affect its heat dissipation efficiency even better than the conventional heat sink 4.

Finally, please refer to FIG. 14 , which is a perspective view and a cross-sectional view of a second embodiment of the heat dissipation device. The difference between the first embodiment and the second embodiment of the heat dissipation device is that the first and second plates of the heat dissipation fin are 201, 202 is configured to set the heat transfer element 6 as shown in FIG. 7, so when the second side 31 of the base 3 is in contact with the heat source 5, the heat generated by the heat source 5 is generated by the second of the base 3. The side 31 is transferred to the first side 30 and then transferred to the heat sink fin 20, and then the heat is transferred to the independent flow path 21 of the heat transfer element 6 sandwiched by the first and second plates 201, 202 to be independent. The working fluid 22 in the flow path 21 performs gas-liquid two-phase circulation inside thereof to increase the heat dissipation efficiency of the heat sink 4, so that the aforementioned effects can be achieved as well.

As mentioned above, this creation has the following advantages over the prior art:

1. Greatly improve the heat dissipation efficiency; 2. Significantly reduce the volume of the heat sink.

The above description has been made in detail, but the above is only a preferred embodiment of the present invention. When it is not possible to limit the scope of the creation of the creation, that is, the equivalent change and modification according to the scope of the present application. Etc., should still be covered by the patents of this creation.

Claims (22)

A heat dissipating unit having at least one heat dissipating fin, wherein the heat dissipating fin is composed of a first plate body and a second plate body, and the first and second plate bodies jointly define a plurality of independent flow channels. The separate flow channels are filled with a working fluid. The heat dissipation unit of claim 1, wherein the heat dissipation fin further has at least one groove formed on one of the first plate body or the second plate body, the first The two plates are correspondingly closed to close the groove to form the independent flow path. The heat dissipating unit of claim 1, wherein the heat dissipating fin further has a plurality of grooves, the groove further having at least one first groove portion and at least one second groove portion, the first groove portion being formed in the On the first plate body, the second groove portion is formed on the second plate body, and the first and second plate bodies are covered to close the first and second groove portions to form the independent flow path. . The heat dissipating unit of claim 1, wherein at least one heat transfer element is further sandwiched between the first and second plates, and the independent flow path is formed inside the heat transfer element. The heat dissipating unit according to claim 2 or 3, wherein the groove is formed by machining, and the machining is press working. The heat dissipating unit according to claim 2 or 3, wherein the grooves may be formed on the first and second plates in a staggered arrangement, or the grooves may be formed side by side or diagonally side by side. The first and second plates are on the body. The heat dissipating unit according to claim 1, wherein the inner wall of the independent flow channel is further provided with at least one capillary structure, and the capillary structure is a mesh body or a fiber body or a structure or a groove having a porous property. . The heat dissipating unit according to claim 4, wherein the inner wall of the independent flow channel is further provided with at least one capillary structure, and the capillary structure is a mesh body or a fiber body or a structure or a groove having a porous property. . The heat dissipating unit according to claim 7 or 8, wherein the coating unit is further provided with a coating film corresponding to the inner wall of the independent flow channel or the inner wall of any one of the capillary structures or the independent flow channel. The capillary structure is set at the same time. The heat dissipating unit according to claim 1, wherein the heat dissipating fins form a plurality of ribs in other places where the independent flow path is not provided, and the ribs are disposed in a lateral or longitudinal direction or staggered, and the ribs are used for the ribs. To increase the structural strength of the heat dissipation fins. A heat dissipating device includes: a pedestal having a first side and a second side; and a heat dissipating unit having at least one heat dissipating fin disposed on the first side, the heat dissipating fin system The first plate body and the second plate body are correspondingly covered, and the first and second plate bodies jointly define a plurality of independent flow channels, and the independent flow channels are filled with a working fluid. The heat dissipating device of claim 11, wherein the heat dissipating fin further has at least one groove formed on one of the first plate body or the second plate body, the first The two plates are correspondingly closed to close the groove to form the independent flow path. The heat dissipation device of claim 11, wherein the heat dissipation fin further has a plurality of grooves, the groove further has a first groove portion and a second groove portion, wherein the first groove portion is formed in the first In a plate body, the second groove portion is formed on the second plate body, and the first and second plate bodies are covered to close the first and second groove portions to form the independent flow channel. The heat dissipating device of claim 11, wherein at least one heat transfer element is further sandwiched between the first and second plates, and the independent flow path is formed inside the heat transfer element. The heat sink of claim 12 or 13, wherein the recess is formed by machining, the machining being a stamping process. The heat dissipating device of claim 12 or 13, wherein the grooves may be formed on the first and second plates in a staggered arrangement, or the grooves may be formed side by side or diagonally side by side. The first and second plates are on the body. The heat dissipating device of claim 11, wherein the inner wall of the independent flow channel is further provided with at least one capillary structure, wherein the capillary structure is a mesh body or a fiber body or a structure or a groove having a porous property. . The heat dissipating device of claim 14, wherein the inner wall of the independent flow channel is further provided with at least one capillary structure, wherein the capillary structure is a mesh body or a fiber body or a structure or a groove having a porous property. . The heat dissipating device according to claim 17 or 18, further comprising a plating film corresponding to an inner wall of the independent flow channel or an inner wall of any one of the capillary channels or the independent flow channel The capillary structure is set at the same time. The heat dissipating device of claim 11, wherein the heat dissipating fins form a plurality of ribs in other portions of the independent flow channel, the ribs are disposed in a lateral or longitudinal direction or staggered, and the ribs are used. To increase the structural strength of the heat dissipation fins. The heat dissipating device of claim 11, wherein the first side of the base forms at least one recessed groove, and the heat dissipating fin is correspondingly fixed in the recessed groove. The heat dissipating device of claim 21, wherein the heat dissipating unit is fixed in the recessed groove by any one of fitting or riveting or welding or gluing or snapping.