TWM517315U - Heat dissipating unit - Google Patents

Description

Cooling unit

This creation is a heat sink unit, especially for heat sinks that are used for heat dissipation.

With the current gradual appeal of electronic devices, all components must be reduced in size, but the heat generated by the shrinking of electronic devices has become a major obstacle to the improvement of performance of electronic devices and systems. Therefore, in order to effectively solve the problem of heat dissipation of components in electronic equipment, the industry has proposed a Vapor chamber and a heat pipe with better heat conduction performance to effectively solve the current heat dissipation problem.

The Vapor chamber is a rectangular casing (or plate body), and a capillary structure is arranged on the inner wall of the casing, and the inside of the casing is filled with working liquid, and one side of the casing ( That is, the evaporation zone is attached to a heating element (such as a central processing unit, a north-south bridge chip, a transistor, an MCU, etc.) to adsorb heat generated by the heating element, so that the liquid working liquid is generated in the evaporation zone of the housing. The evaporation is converted into a vapor state, and the heat is transferred to the condensation zone of the casing. The vaporized working liquid is cooled and condensed into a liquid state in the condensation zone, and the liquid working liquid is recirculated through the gravity or capillary structure to the evaporation zone to continue the steam. Liquid circulation to effectively achieve the effect of uniform temperature dissipation.

The principle and theoretical structure of the heat pipe is the same as that of the temperature equalizing plate. The hollow part of the heat pipe of the circular pipe is filled with metal powder (or woven mesh-like capillary) and sintered. The inner wall of the heat pipe forms an annular capillary structure, after which the heat pipe is evacuated and filled with a working liquid, and finally closed to form a heat pipe structure. When the working liquid is evaporated by the evaporation portion and evaporated to the condensation end, and the working liquid is in a vapor state in the evaporation portion, when the evaporation portion is separated and diffused toward the condensation end, it is gradually cooled and condensed into a liquid state, and then It is returned to the evaporation portion through the capillary structure.

Comparing the method of heat conduction between the temperature equalizing plate and the heat pipe is different, the heat conduction mode of the temperature equalizing plate is two-dimensional, which is the heat conduction mode of the surface, but the heat conduction mode of the heat pipe is a one-dimensional heat conduction mode.

How to use these two heat transfer units more efficiently is the current efforts of the industry.

Therefore, in order to effectively solve the above problems, an object of the present invention is to provide a casing and a heat pipe in which two chambers are connected, and the capillary structure in the chamber of the casing is capillaryly coupled to the capillary in the chamber in the heat pipe. Structure of the heat sink unit.

Another object of the present invention is to provide a heat dissipating unit including a casing and a heat pipe, wherein a capillary structure thickness of the casing in the casing chamber of the casing is equal to a thickness of the heat pipe wall of the heat pipe plus a thickness of the heat pipe capillary structure to make the casing capillary The structure is capillaryly connected to the heat pipe capillary structure.

Another object of the present invention is to provide a capillary force that can be transferred from a chamber within a housing or to a chamber within a heat pipe such that the cooled working fluid can be returned from the heat pipe to the heat transfer unit within the housing by capillary forces. .

In order to achieve the above object, the present invention provides a heat dissipating unit, comprising: a casing having a casing chamber, the casing chamber is provided with a casing capillary structure and a working fluid; and a heat pipe having a closed end and a An open end and a heat pipe wall having an outer side and an inner side, the inner side defining a heat pipe chamber communicating with the open end, a heat pipe capillary structure being disposed on the inner side of the heat pipe wall and located in the heat pipe cavity The indoor end; wherein the open end of the heat pipe is inserted into the housing chamber, and the heat pipe chamber communicates with the housing chamber through the open end, and the heat pipe capillary structure is capillaryly coupled to the housing capillary structure.

In one implementation, the capillary structure of the housing partially or completely defines a first thickness, the heat pipe wall defines a second thickness, the heat pipe capillary structure defines a third thickness, and the first thickness is equal to the second thickness The thickness is added to the third thickness.

In one implementation, the housing capillary structure has a first end, and the heat pipe capillary structure has a second end capillaryly coupled to the first end.

In one implementation, the housing chamber has a housing inner wall defining a capillary-free structural region, and the housing capillary structure is disposed on the inner wall of the housing that avoids the capillary-free structural region.

In one embodiment, the housing capillary structure has a first connecting side connecting the inner wall of the housing and a first free side to the housing chamber, the first thickness being defined on the first connecting side and the first free side The heat pipe capillary structure has a second connecting side connecting the inner side of the heat pipe wall and a second free side to the heat pipe chamber, the third thickness being defined on the second connecting side and the second free side between.

10‧‧‧shell

101‧‧‧ top side

102‧‧‧ bottom side

103‧‧‧ side

1031‧‧‧ openings

11‧‧‧Shell chamber

112‧‧‧ housing inner wall

1121‧‧‧No capillary structure area

114‧‧‧Shell capillary structure

1141‧‧‧ first end

1143‧‧‧ first link side

1144‧‧‧First free side

20‧‧‧heat pipe

201‧‧‧closed end

202‧‧‧open end

203‧‧‧Hot wall

2031‧‧‧ outside

2032‧‧‧ inside

204‧‧‧heat pipe chamber

205‧‧‧heat pipe capillary structure

2051‧‧‧ second end

2053‧‧‧Second link side

2054‧‧‧Second free side

B1‧‧‧first thickness

B2‧‧‧second thickness

B3‧‧‧ third thickness

40‧‧‧Fixing fin set

401‧‧‧heat fins

The following figures are intended to make the present invention easier to understand, and the drawings are described in detail herein and form part of the specific embodiments. Through the specific embodiments herein and with reference to the corresponding drawings, the specific embodiments of the present invention are explained in detail, and the function principle of the creation is explained.

Figure 1 is a three-dimensional exploded view of the creation;

Figure 2 is a three-dimensional combination diagram of the creation;

Figure 3 is a schematic cross-sectional view of the creation;

Figure 4 is a schematic cross-sectional view of the creation;

Figure 5 is a partial enlarged view of Figure 4:

Figure 6 is a schematic diagram of the combination of the creation and the fin set.

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 Fig. 1 for a three-dimensional exploded view of the creation; Figure 2 is a three-dimensional combination diagram of the creation; Figure 3 is a schematic exploded view of the creation; Figure 4 is a cross-sectional combination of the creation Fig. 5 is a partially enlarged schematic view of Fig. 4. As shown, the present invention includes a housing 10 and at least one heat pipe 20. The housing 10 is a flat-plate heat conduction unit, for example, a temperature equalizing plate or a flat plate heat pipe, and has a top side 101, a bottom side 102 and a side edge 103 ringed on the top side 101 and the bottom side 102. between. The side 103 defines at least one opening 1031. The number of the openings 1031 matches the number of the heat pipes 20.

A housing chamber 11 is defined between the top side 101 and the bottom side 102 and the side edges 103. The housing chamber 11 is provided with a working fluid (not shown) and a casing capillary structure 114, such as but not limited to pure water, inorganic compounds, alcohols, ketones, liquid metal, cold coal, organic a compound or a mixture thereof. The housing chamber 11 has a housing inner wall 112 defining a capillary-free structural region 1121 adjacent the opening 1031, the housing capillary structure 114 being disposed on the inner wall of the housing avoiding the eccentric structure region 1121 112 has a first end 1141 corresponding to the wickless structure region 1121.

The heat pipe 20 has a closed end 201, an open end 202 and a heat pipe wall 203. The heat pipe wall 203 has an outer side 2031 and an inner side 2032. The inner side 2032 defines a heat pipe chamber 204 between the closed end 201 and the open end 202 and communicates with the open end 202. A heat pipe capillary structure 205 is disposed thereon. The inner side 2032 of the heat pipe wall 203 extends from the heat pipe chamber 204 to the open end 202 and has a second end 2051 located at the open end 202.

The closed end 201 of the heat pipe 20 is, for example but not limited to, curved to extend above or horizontally of the housing 10, and the open end 202 of the heat pipe 20 is inserted into the housing chamber 11 from the side 103 of the housing 10. The heat pipe chamber 204 communicates with the housing chamber 11 through the open end 202, and the heat pipe capillary structure 205 is capillaryly coupled to the housing capillary structure 114, that is, the first end 1141 of the housing capillary structure 114. The capillary ends join the second end 2051 of the heat pipe capillary structure 205.

The aforementioned housing capillary structure 114 has a first connecting side 1143 connecting the housing inner wall 112 and a first free side 1144 facing the housing chamber 11. The heat pipe capillary structure 205 has a second connecting side 2053 connecting the inner side 2032 of the heat pipe wall 203 and a second free side 2054 facing the heat pipe cavity 204. The casing capillary structure 114 and the heat pipe capillary structure 205 are, for example, sintered metal powder bodies or mesh braids or grooves or bundle fibers, etc., and have a porous structure capable of providing capillary force to drive the working fluid flow.

By "capillary connection" is meant that the porous structure of the capillary structure 114 communicates with the porosity of the heat pipe capillary structure 205 such that capillary forces can be transferred or extended from the heat pipe capillary structure 205 to the housing capillary structure 114, while cooling work The fluid can be returned from the heat pipe capillary structure 205 to the housing capillary structure 114 by the capillary force to return to the housing chamber 11.

Furthermore, the housing capillary structure 114 defines a first thickness B1 between the first connecting side 1143 and the first free side 1144. The heat pipe wall 203 defines a second thickness B2 on the outer side 2031 and the Between the inner side 2032, the heat pipe capillary structure 205 defines a third thickness B3 between the second connecting side 2053 and the second free side 2054, and the first thickness B1 of the housing capillary structure 114 is equal to the heat pipe. The second thickness of the wall 203 is added to the third thickness B3 of the heat pipe capillary structure 205, thereby enabling the housing capillary structure 114 to be directly capillaryly coupled to the heat pipe capillary structure 205 without causing problems of inconsistent thickness or high and low drop. Unable to make a capillary link.

In particular, although the illustration of the present embodiment indicates that the entirety of the housing capillary structure 114 is the first thickness B1, in an alternative implementation, only the first end 1141 of the housing capillary structure 114 may be the first. The thickness B1, the remaining thickness is slightly thinner than the first thickness B1, so that the space occupied by the housing capillary structure 114 can be reduced, and the housing capillary structure 114 can be directly capillaryly coupled with the heat pipe capillary structure 205. .

Please refer to FIG. 6 again. Referring to FIGS. 1 to 5 together, a heat dissipation fin set 40 is serially connected to the heat pipe 20 and located above the casing 10. The heat dissipation fin set 40 includes a plurality of heat dissipation fins. The sheets 401 are spaced apart to assist in the dissipation of the working fluid within the heat pipe 20.

Therefore, after the working fluid in the housing chamber 11 is evaporated to a gas, the open end 202 of the heat pipe 20 flows into the heat pipe chamber 204, and then the heat-dissipating fin group 40 dissipates heat, and the cooled working fluid After being turned into a liquid, it is returned from the heat pipe capillary structure 205 by capillary force to the casing capillary structure 114, and then returned to the casing chamber 11.

With the above arrangement, the capillary structure 114 of the housing is coupled to the capillary of the heat pipe capillary structure 205 so that the capillary forces of the heat pipe chamber 204 and the housing chamber 11 can be transmitted or extended to each other.

However, the above descriptions are only preferred embodiments of the present invention, and variations of the methods, shapes, structures, and devices described above are intended to be included in the scope of the present invention.

10‧‧‧shell

101‧‧‧ top side

102‧‧‧ bottom side

103‧‧‧ side

11‧‧‧Shell chamber

112‧‧‧ housing inner wall

114‧‧‧Shell capillary structure

1141‧‧‧ first end

1143‧‧‧ first link side

1144‧‧‧First free side

20‧‧‧heat pipe

201‧‧‧closed end

202‧‧‧open end

2031‧‧‧ outside

2032‧‧‧ inside

204‧‧‧heat pipe chamber

205‧‧‧heat pipe capillary structure

2051‧‧‧ second end

2053‧‧‧Second link side

2054‧‧‧Second free side

B1‧‧‧first thickness

B2‧‧‧second thickness

B3‧‧‧ third thickness

Claims (6)

A heat dissipation unit comprising:
a housing having a housing chamber, the housing chamber being provided with a housing capillary structure and a working fluid;
a heat pipe having a closed end, an open end and a heat pipe wall, the heat pipe wall having an outer side and an inner side, the inner side defining a heat pipe chamber communicating with the open end, and a heat pipe capillary structure being disposed on the heat pipe An inner side of the wall and extending from the heat pipe chamber to the open end;
The open end of the heat pipe is inserted into the housing cavity, and the heat pipe cavity communicates with the casing cavity through the open end, and the heat pipe capillary structure is capillaryly coupled to the casing capillary structure. The heat dissipating unit of claim 1, wherein the housing capillary structure has a first end, and the heat pipe capillary structure has a second end capillaryly coupled to the first end. The heat dissipation unit of claim 2, wherein the housing capillary structure partially or completely defines a first thickness, the heat pipe wall defines a second thickness, the heat pipe capillary structure defines a third thickness, and the heat pipe capillary structure The first thickness is equal to the second thickness plus the third thickness. The heat dissipating unit of claim 3, wherein the housing chamber has a housing inner wall defining a capillary-free structural region, and the housing capillary structure is disposed on the inner wall of the housing avoiding the eccentric structure region. The heat dissipating unit according to any one of claims 1 to 4, wherein the housing has a top side, a bottom side and a side ring disposed between the top side and the bottom side, the housing chamber defining Between the top side and the bottom side and the side edges. The heat dissipating unit of claim 5, wherein the open end of the heat pipe is inserted into the housing chamber from a side of the housing.