TWI650524B - Loop heat pipe structure - Google Patents

Abstract

A loop heat pipe structure comprising an evaporator having an evaporation chamber having a first capillary structure and filled with a working fluid; at least one vapor tube having a first end and a second end, the first One end is connected to one end of the evaporator; and at least one liquid tube has a third end and a fourth end, the third end communicates with the second end of the at least one vapor tube to form a condensation section, and the fourth end The other end of the evaporator is connected to form a circuit of the working fluid, and the total pipe diameter of the steam pipe is larger than the total pipe diameter of the liquid pipe.

Description

Loop heat pipe structure

The present invention is a loop heat pipe structure, and more particularly to a loop heat pipe structure which can increase the gas output of a working fluid in a gas phase.

According to the current electronic devices, as the performance of the electronic devices increases, the electronic components that process signals and calculations generate relatively higher heat than the previous electronic components. The most commonly used heat dissipation components include heat pipes, heat sinks, and temperature equalization plates. The components are further increased in heat dissipation by directly contacting the electronic components that can be heated, and the electronic components are prevented from being overheated and burned. Furthermore, a fan with a forced heat dissipation effect is provided to dissipate the heat dissipating components, and the fan does have the effect of improving heat dissipation. However, in a limited space, not all fans can be provided, so the space problem is also a key point to consider. One. Another manufacturer provides a loop heat pipe (LHP) that uses a vaporization chamber to incorporate a condensing unit with a condensing unit and is connected by a tube to form a loop module.

However, since the above-mentioned loop heat pipe structure is used for connecting the evaporation chamber and the tube of the condensing device, it can be distinguished from the evaporation outlet from the evaporation chamber to the condensing device as a vapor tube, and the condensing device to the evaporation chamber. There are two parts of the liquid pipe at the inlet, but since the pipe diameter is the same regardless of whether it is a steam pipe or a liquid pipe, there is no excess pipe diameter for the working fluid of the gas phase to pass, and the density of the working fluid in the gas phase is higher. a small, identical amount of working fluid in the gas phase and a working fluid in the liquid phase. The flow rate of the working fluid in the gas phase is smaller than the flow rate of the working fluid in the liquid phase, so that the flow rate of the working fluid in the liquid phase flows out of the working fluid in the gas phase. The flow rate is still large, so that the working fluid in the gas phase in the evaporation chamber cannot be quickly penetrated. The working fluid that is transferred to the condensing device for condensation into a liquid phase, and the working fluid of the condensed liquid phase has been returned to the evaporation chamber, and the vapor of the evaporation chamber is blocked in the cavity, thereby causing the overall heat dissipation effect good.

Therefore, how to solve the above problems and problems in the past, that is, the inventors of this 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, an object of the present invention is to provide an air flow rate of a working fluid which can increase the gas phase so that the flow rate of the working fluid in the gas phase and the liquid phase in the liquid phase are consistent, thereby achieving a large A loop heat pipe structure that enhances heat dissipation.

To achieve the above object, the present invention provides a loop heat pipe structure comprising: an evaporator having an evaporation chamber having a first capillary structure and filled with a working fluid; at least one vapor tube having a first One end and a second end, the first end is connected to one end of the evaporator; and at least one liquid tube has a third end and a fourth end, the third end is connected to the second end of the at least one vapor tube Forming a condensation section, and the fourth end is connected to the other end of the evaporator to form a circuit of the working fluid, and the total diameter of the steam pipe is larger than the total pipe diameter of the liquid pipe.

In one implementation, the first end and/or the second end of the at least one vapor tube form a plurality of communication tubes.

In one implementation, the condensation section defines a condensation chamber, the second end of the at least one vapor tube communicates with the condensation chamber, and the third end of the at least one liquid tube communicates with the condensation chamber.

In one implementation, the condensation section is formed with a plurality of condensation tubes, the second end of the at least one vapor tube is in communication with one end of the condensation tubes, and the third end of the at least one liquid tube is in communication with the other end of the condensation tubes.

In one implementation, the at least one liquid tube has a second capillary structure therein.

In one implementation, the condensation section has a third capillary structure that is capillaryly coupled to the second capillary structure.

In one implementation, the condensation section has a fin set.

In one implementation, the first capillary structure defines the evaporation chamber partition as a liquid chamber and a vapor chamber adjacent to the fourth end of the at least one liquid tube and stores the working fluid in the liquid phase, the vapor chamber Adjacent to the first end of the at least one vapor tube and for the working fluid of the gas phase, and the first capillary structure is provided with a plurality of grooves for the working fluid of the gas phase to flow.

According to the design of the present invention, the cross-sectional area of the main pipe diameter of the steam pipe of the present invention is larger than the cross-sectional area of the total pipe diameter of the liquid pipe, so that the gas output of the working fluid in the gas phase can be increased, so that the working fluid and liquid in the gas phase can be obtained. The flow rate of the working fluid of the phase is consistent, which can greatly improve the heat dissipation effect of the heat pipe structure of the loop.

10‧‧‧Circular heat pipe structure

110‧‧‧Evaporator

115‧‧‧Evaporation chamber

115a‧‧‧Liquid chamber

115b‧‧‧Vapor chamber

117‧‧‧First capillary structure

117a‧‧‧ trench

130‧‧‧Vapor tube

131‧‧‧ first end

131a, 133a‧‧‧Connected pipe

133‧‧‧ second end

150‧‧‧Liquid tube

152‧‧‧ third end

154‧‧‧ fourth end

156‧‧‧Second capillary structure

170‧‧‧Working fluid

190‧‧‧Condensation section

192‧‧‧Fin set

194‧‧‧Condensation chamber

196‧‧‧ Third capillary structure

The following drawings are intended to provide a more complete understanding of the invention, and are in the The specific embodiments of the present invention are described in detail by reference to the specific embodiments herein, 1 is a schematic view of an evaporator of a first embodiment of a loop heat pipe structure of the present invention; FIG. 1a is a schematic view showing a cross-sectional area of a main pipe diameter of a steam pipe and a liquid pipe of the present invention; FIG. The present invention is a top cross-sectional view of a first embodiment of a loop heat pipe structure of the present invention; FIG. 3 is a top cross-sectional view of a second embodiment of the loop heat pipe structure of the present invention; and FIG. 4 is a loop heat pipe structure of the present invention. 2 is a top cross-sectional view of a third embodiment of a loop heat pipe structure of the present invention; and FIG. 6 is a top cross-sectional view of a fourth embodiment of the loop heat pipe structure of the present invention. Figure 7 is a top cross-sectional view showing a fifth embodiment of the loop heat pipe structure of the present invention; 8 is a top cross-sectional view of a sixth embodiment of the loop heat pipe structure of the present invention; FIG. 8a is a schematic view showing a cross-sectional area of a plurality of steam pipes and a liquid pipe of a loop heat pipe structure of the present invention; FIG. The present invention is a top cross-sectional view of a seventh embodiment of the loop heat pipe structure of the present invention; and FIG. 9a is a schematic view showing a cross-sectional area of a plurality of steam pipes and a plurality of liquid pipes of the loop heat pipe structure of the present invention.

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 FIGS. 1, 1a and 2, which are schematic diagrams of the evaporator of the first embodiment of the loop heat pipe structure of the present invention, and a schematic cross-sectional view and a cross-sectional view of the cross-sectional area of the main pipe diameter of a steam pipe and a liquid pipe, as shown in the figure. The loop heat pipe structure 10 of the present invention comprises an evaporator 110, at least one steam pipe 130 and at least one liquid pipe 150.

The evaporator 110 has an evaporation chamber 115 having a first capillary structure 117 therein and filled with a working fluid 170. In the present embodiment, the first capillary structure 117 is defined as defining the evaporation chamber 115 as a liquid chamber 115a and a vapor chamber 115b adjacent to the at least one liquid tube 150 and storing the liquid phase. The working fluid 170, the vapor chamber 115b is adjacent to the at least one vapor tube 130 and passes through the working fluid 170 in the gas phase, and the first capillary structure 117 is provided with a plurality of grooves for the working fluid 170 of the gas phase to flow. 117a.

The at least one vapor tube 130 has a first end 131 and a second end 133. The first end 131 and the second end 133 are respectively located at two ends of the at least one steam tube 130. The first end 131 is connected to the first end 131. The evaporation chamber 115 of the evaporator 110. In the present embodiment, it is expressed as a vapor tube 130 communicating with the evaporation of the evaporator 110. The chamber 115, and in the present embodiment, the first end 131 of the at least one vapor tube 130 is in direct communication with the evaporation chamber 115 of the evaporator 110.

The at least one liquid tube 150 has a third end 152 and a fourth end 154. The third end 152 and the fourth end 154 are respectively located at two ends of the at least one liquid tube 150, and the third end 152 is connected. The second end 133 of the vapor tube 130, and the fourth end 154 is connected to the other end of the evaporator 110 to form a circuit of the working fluid 170, and the at least one liquid tube 150 extends into the evaporation chamber 115. In the present embodiment, the at least one liquid tube 150 is shown as having a second capillary structure 156. In the present embodiment, it is shown that a liquid pipe 150 communicates with the steam pipe 130, and the third end 152 communicates with the second end 133 of the steam pipe 130 to form a condensation section 190, and the condensation section 190 There is a fin set 192.

The total tube diameter cross-sectional area of the vapor tube 130 is greater than the total tube diameter cross-sectional area of the liquid tube 150. Referring to FIG. 1a, in the present embodiment, the total tube diameter cross-sectional area of one vapor tube 130 is greater than the diameter of one liquid tube 150. Cross-sectional area.

In one embodiment, the evaporator 110 is in contact with a heat source (not shown) that conducts heat, and the first capillary structure 117 is a working fluid 170 that absorbs a liquid phase in the liquid chamber 115a of the evaporation chamber 115. The evaporator 110 absorbs the heat of the heat generating source, and the working fluid 170 of the liquid phase in the first capillary structure 117 is evaporated by heat to form the working fluid 170 of the gas phase, and then flows from the grooves 117a to the vapor chamber 115b. From the first end 131, the vapor tube 130 flows toward the condensation section 190, and the gaseous working fluid 170 enters the condensation section 190 from the second end 133, and the gas is absorbed through the condensation section 190 and the fin set 192. The heat of the working fluid 170 is radiated to the outside, and the working fluid 170 of the gas phase is condensed to form a working fluid 170 of the liquid phase, and the working fluid 170 of the liquid phase enters the liquid pipe 150 from the third end 152 by The second capillary structure 156 in the liquid tube 150 accelerates to the fourth end 154, and finally the liquid phase working fluid 170 is returned to the liquid chamber 115a of the evaporation chamber 115 to continue to circulate.

Thereby, since the overall total (ie, single or plural total) cross-sectional area of the vapor tube 130 is larger than the overall total (ie, single or plural total) cross-sectional area of the liquid tube 150, the design may be increased. gas The outflow of the working fluid 170 of the phase, thus increasing the flow rate of the working fluid 170 entering the gas phase of the condensing section 190, so that the flow rate of the working fluid 170 of the gas phase and the working fluid 170 of the liquid phase are consistently increased, thereby greatly increasing The heat dissipation effect of the loop heat pipe structure 10.

Please refer to FIGS. 3 and 4 , which are schematic cross-sectional views and a condensing section of the second embodiment of the loop heat pipe structure of the present invention, and supplemented with reference to FIGS. 1 and 2 , as shown in the figure, a partial structure of the embodiment. The function and the function are the same as those of the foregoing first embodiment, and therefore will not be described herein again. However, the difference between the embodiment and the first embodiment is that the condensation section 190 is formed with a condensation chamber 194, which is formed by the vapor tube 130. The second end 133 communicates with the condensation chamber 194 and the third end 152 of the liquid tube 150 communicates with the condensation chamber 194.

In the present embodiment, the condensation section 190 has a third capillary structure 196 that is capillaryly coupled to the second capillary structure 156. "Capillary connection" as used in the present invention means that the second or third capillary structures 156, 196 are substantially in contact with or abutted or connected such that the porosity of the second capillary structure 156 communicates with the porosity of the third capillary structure 196, The capillary force can be transferred or extended from the third capillary structure 196 to the second capillary structure 156, and the liquid phase working fluid 170 can be returned from the condensation section 190 into the liquid chamber 115a by the capillary force.

Thereby, the condensation chamber 194 can receive more gas phase working fluid 170 for heat dissipation, and by the capillary force of the second and third capillary structures 156, 196, the liquid phase working fluid 170 can be quickly returned to the The liquid chamber 115a further greatly enhances the heat dissipation effect of the loop heat pipe structure 10.

Please refer to FIG. 5 , which is a top cross-sectional view of a third embodiment of the loop heat pipe structure of the present invention, and with reference to FIGS. 3 to 4 , as shown in the figure, a part of the structure and function of the embodiment and the foregoing The second embodiment is the same, so it will not be described here. However, the difference between the embodiment and the second embodiment is that the second end 133 of the vapor tube 130 is connected with the third end 152 of the liquid tube 150. The condensation section 190 is, in a specific implementation, a plurality of condenser tubes, the second end 133 of the vapor tube 130 is in communication with one end of the tubes, and the third end 152 of the liquid tube 150 is connected to the other end of the tubes.

Thereby, the condensing tubes can receive more gas phase working fluid 170 for heat dissipation, thereby greatly improving the heat dissipation effect of the loop heat pipe structure 10.

Please refer to FIG. 6 , which is a top cross-sectional view of a fourth embodiment of the loop heat pipe structure of the present invention, and is supplemented with reference to FIG. 5 , as shown in the figure, a part of the structure and function of the embodiment and the foregoing third embodiment. The example is the same, so it will not be described again here. However, the difference between the embodiment and the third embodiment is that the first end 131 of the vapor tube 130 forms a plurality of connecting tubes 131a to communicate with the evaporation chamber 115, thereby connecting The vapor chamber 115b of the evaporation chamber 115 of the evaporator 110.

Thereby, the communication tubes 131a can increase the flow rate of the working fluid 170 entering the gas phase of the condensation section 190, so that the flow rate of the working fluid 170 of the gas phase and the working fluid 170 of the liquid phase are consistent, thereby greatly increasing the ring. The heat dissipation effect of the road heat pipe structure 10.

Please refer to FIG. 7 , which is a top cross-sectional view of a fifth embodiment of the loop heat pipe structure of the present invention, and is supplemented with reference to FIG. 5 , as shown in the figure, a part of the structure and function of the embodiment and the foregoing third embodiment. The example is the same, so it will not be described here. However, the difference between the embodiment and the third embodiment is that the second end 133 of the vapor tube 130 forms a plurality of communicating tubes 133a to communicate with the condensation section 190, thereby connecting The condensation chamber 194 of the condensation section 190.

Thereby, the communication tubes 133a can increase the flow rate of the working fluid 170 entering the gas phase of the condensation section 190, so that the flow rate of the working fluid 170 of the gas phase and the working fluid 170 of the liquid phase are consistent, thereby greatly increasing the ring. The heat dissipation effect of the road heat pipe structure 10.

Please refer to FIG. 8 and FIG. 8a, which are schematic sectional views of the sixth embodiment of the loop heat pipe structure of the present invention, and a schematic diagram of the total pipe diameter BB cross-sectional area of the plurality of steam pipes and a liquid pipe, and supplemented with reference to FIG. As shown in the figure, the structure and function of the embodiment are the same as those of the foregoing fourth embodiment, and therefore will not be further described herein. However, the difference between the embodiment and the fourth embodiment is that the at least one steam tube 130 It is represented as a plurality of vapor tubes 130. The first end 131 of the vapor tubes 130 communicates with the evaporation chamber 115 of the evaporator 110, and the second end 133 of the vapor tubes 130 communicates with the condensation chamber of the condensation section 190. 194.

Referring to FIG. 8a, in the present embodiment, the summed total tube diameter cross-sectional area of the vapor tubes 130 is greater than the total tube diameter cross-sectional area of the liquid tubes 150.

Thereby, the plurality of vapor tubes 130 can guide the flow of the working fluid 170 with more gas phase into the condensation chamber 194 for heat dissipation, thereby greatly improving the heat dissipation effect of the loop heat pipe structure 10.

Please refer to FIG. 9 and FIG. 9a, which are schematic sectional views of the seventh embodiment of the loop heat pipe structure of the present invention, and a schematic diagram of the CC cross-sectional area of the plurality of steam pipes and the plurality of liquid pipes, and supplemented with reference to FIG. As shown in the figure, the structure and function of the embodiment are the same as those of the foregoing fifth embodiment, and therefore will not be further described herein. However, the difference between the embodiment and the seventh embodiment is that the at least one liquid tube 150 is Expressed as a plurality of liquid tubes 150, the third ends 152 of the liquid tubes 150 are in communication with the condensation chamber 194 of the condensation section 190, and the fourth ends 154 of the liquid tubes 150 are in communication with the evaporation chamber 115 of the evaporator 110. .

Referring to FIG. 9a, in the embodiment, the total pipe diameter cross-sectional area of the plurality of steam pipes 130 is greater than the total pipe diameter cross-sectional area of the plurality of liquid pipes 150.

Thereby, the plurality of liquid tubes 150 can increase the return flow of the working fluid 170 in the liquid phase, thereby greatly improving the heat dissipation effect of the loop heat pipe structure 10.

Therefore, by designing the total cross-sectional area of the plurality of vapor tubes 130 of the present invention to be larger than the total cross-sectional area of the plurality of liquid tubes 150, the gas output of the working fluid 170 in the gas phase can be increased to make the gas phase The working fluid 170 is in line with the flow rate of the working fluid 170 in the liquid phase, thereby substantially increasing the efficacy of the loop heat pipe structure 10.

The present invention has been described in detail above, but the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention. That is, the equivalent changes and modifications made by the scope of the present application should remain within the scope of the patent of the present invention.

Claims (8)

A loop heat pipe structure comprising: an evaporator having an evaporation chamber having a first capillary structure and filled with a working fluid; at least one vapor tube having a first end and a second end, The first end is connected to one end of the evaporator; and the at least one liquid tube has a third end and a fourth end, the third end communicates with the second end of the at least one vapor tube to form a condensation section, and the fourth The end is connected to the other end of the evaporator to form a circuit of the working fluid, and the total diameter of the steam pipe is larger than the total pipe diameter of the liquid pipe. The loop heat pipe structure according to claim 1, wherein the first end and/or the second end of the at least one steam pipe form a plurality of connecting pipes. The loop heat pipe structure of claim 1, wherein the condensation section forms a condensation chamber, the second end of the at least one vapor tube communicates with the condensation chamber, and the third end of the at least one liquid tube communicates with the Condensation chamber. The loop heat pipe structure of claim 1, wherein the condensation section is formed with a plurality of condensation tubes, the second end of the at least one vapor tube is connected to one end of the condensation tubes, and the at least one liquid tube is The three ends are connected to the other end of the condensing tubes. The loop heat pipe structure of claim 1, wherein the at least one liquid pipe has a second capillary structure. The loop heat pipe structure of claim 5, wherein the condensation section has a third capillary structure capillaryly connected to the second capillary structure. The loop heat pipe structure of claim 1, wherein the condensation section has a fin set. The loop heat pipe structure of claim 1, wherein the first capillary structure defines the evaporation chamber partition as a liquid chamber and a vapor chamber adjacent to the fourth end of the at least one liquid tube And storing the working fluid in a liquid phase adjacent to the first end of the at least one vapor tube and passing the working fluid in the gas phase, and the first capillary structure is provided with the working fluid flowing in the gas phase Multiple grooves.