CN106052444B - A kind of flat-plate heat pipe array radiator - Google Patents

Abstract

The invention relates to a flat heat pipe array radiator, comprising a heating plate and a condensation plate, the heating plate is arranged horizontally and used for placing heat-generating electronic devices, the condensation plate includes a first condensation plate and a second condensation plate, the first condensation plate A condensing plate and the second condensing plate are respectively arranged vertically upwards at both ends of the heating plate, multiple columns of cooling fins are arranged on both sides of the condensing plate, and a second condensing plate is arranged in the first condensing plate. A condensing channel, a second condensing channel is provided in the second condensing plate; a first hot runner communicating with the first condensing channel is provided on one side of the heating plate, and a first hot runner is provided in the heating plate The other side is provided with a second hot runner communicating with the second condensation channel. The beneficial effects of the present invention are: improving the heat transfer performance of the radiator and strengthening the cooling effect; the liquid heat dissipation working medium flows to the hot runner under the action of gravity, which can form a unidirectional cycle reciprocating motion, and prevent "dry" inside the heating plate. burn" phenomenon.

Description

A flat heat pipe array radiator

technical field

The invention relates to the field of heat dissipation, in particular to a flat heat pipe array radiator.

Background technique

The flat plate pulsating heat pipe utilizes the phase change of the working fluid for heat transfer, which has the advantages of high heat transfer efficiency and good temperature uniformity, and has great advantages in the direction of heat dissipation of high heat flux density electronic equipment. When the traditional flat plate pulsating heat pipe is placed in the horizontal direction for heating, the liquefied medium in the condensation section often cannot return to the heating section in time, which eventually leads to the phenomenon of "dry burning" inside the pulsating heat pipe, which affects the oscillation of the working fluid, and finally reduces the pulsating heat pipe. heat transfer performance.

Contents of the invention

To sum up, in order to overcome the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a flat heat pipe array radiator.

The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a flat heat pipe array radiator, comprising a heating plate and a condensation plate, the heating plate is arranged horizontally and used to place heat-generating electronic devices, the condensation plate includes a first condensation plate and The second condensing plate, the first condensing plate and the second condensing plate are arranged vertically upwards at both ends of the heating plate, and both sides of the condensing plate are provided with multiple columns of cooling fins. A first condensation channel is provided at a position corresponding to each row of fins in the first condensation plate, and a second condensation channel is provided at a position corresponding to each row of fins in the second condensation plate. The first condensing channel and the second condensing channel are mirror images, and both the first condensing channel and the second condensing channel are in the shape of a U with the opening facing downwards. A liquid filling hole for adding heat-dissipating working fluid in the first condensation channel and the second condensation channel;

A first hot runner connected to the first condensation channel is provided on one side of the heating plate, and the first hot runner is U-shaped with an opening facing the outside of the heating plate. The other side is provided with a second hot runner connected to the second condensing channel, the second runner is mirror-symmetrically arranged with the first hot runner with respect to the center line of the heating plate, and the first hot runner The U-shaped bottom walls of the first hot runner and the second hot runner are provided with uneven capillary structures.

The beneficial effects of the present invention are:

(1) The liquid heat dissipation working medium flows to the hot runner under the action of gravity, which can form a one-way reciprocating motion, prevent the "dry burning" phenomenon inside the heating plate, and improve the heat transfer performance of the radiator;

(2) When the heating plate is placed horizontally, the condensing plate is placed vertically, which is more conducive to gravity reflux and strengthens the internal working medium oscillation;

(3) The radiator can be regarded as two pulsating heat pipes sharing a heating section, and the heat transmitted from the chip or components to the heating plate is cooled by the two condensing plates at the same time, which strengthens the cooling effect;

(4) There are multiple heat sinks on the surface of the two vertically placed condensing plates, which increases the convective heat dissipation area with the air on the basis of the traditional flat pulsating heat pipe, which is conducive to increasing the temperature difference between the cold and hot ends of the pulsating heat pipe and enhancing The oscillation of the internal working fluid finally has the effect of enhancing heat transfer;

(5) The radiator is modularized, which is convenient for processing and installation, and the modules can be combined and arrayed according to the actual heat dissipation needs;

(6) The capillary microstructure surface (can be made into a variety of structures) at the bend of the hot runner is conducive to the formation of bubble cores, increasing the probability of bubbles generated by the working fluid in the heating section, and finally has the effect of enhancing heat transfer.

On the basis of above-mentioned technical scheme, the present invention can also do following further improvement:

Further, the first hot runner includes an outer hot runner with a larger opening and a plurality of inner hot runners with smaller openings arranged in the outer hot runner, and the same first condensation channel communicates with the outer hot runner and the outer heat flow The closest inner hot runner or two adjacent inner hot runners.

The beneficial effects of adopting the above further technical solution are: increasing the heat dissipation area and ensuring uniform heat dissipation.

Further, the heat dissipation working medium is any one of methanol, ethanol and acetone or a nanofluid.

The beneficial effect of adopting the above further technical solution is to increase the heat dissipation efficiency.

Further, the heating plate, the condensing plate and the heat sink are all made of copper or aluminum.

The beneficial effects of adopting the above further technical solution are: high thermal conductivity and increased heat dissipation efficiency.

Further, the heating plate, the condensing plate and the cooling fins are 3D printed and formed at one time.

The beneficial effect of adopting the above further technical solution is: avoiding damage to the lumen caused by bending the flat heat pipe.

Description of drawings

Fig. 1 is the front view of the present invention;

Fig. 2 is the top view of the present invention;

Fig. 3 is A-A sectional view of Fig. 2;

Fig. 4 is a side view of the present invention;

Fig. 5 is a B-B sectional view of Fig. 4 .

In the accompanying drawings, the list of parts represented by each label is as follows:

1. Heating plate, 2. First condensing plate, 3. Second condensing plate, 4. Heat sink, 5. First condensing channel, 6. Second condensing channel, 7. Filling hole, 8. First hot runner , 9, the second hot runner, 10, capillary structure.

detailed description

The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

As shown in Figures 1-4, a flat heat pipe array radiator includes a heating plate 1 and a condensing plate, the heating plate 1 is arranged horizontally and used to place heat-generating electronic devices, and the condensing plate includes a first condensing plate 2 and a The second condensing plate 3, the first condensing plate 2 and the second condensing plate 3 are arranged vertically upwards at both ends of the heating plate 1, and both sides of the condensing plate are provided with multiple rows of heat dissipation slice 4. The condensing plate is placed vertically, and a plurality of fins 4 are arranged on the walls on both sides of the condensing plate to enhance heat dissipation. ), the surfaces of the two vertically placed condensing plates are arranged with a plurality of cooling fins 4, and suitable gaps are left between the upper, lower, left, and right sides of the cooling fins 4, so that the wind from different directions blows through and plays a better heat exchange effect. On the basis of the traditional flat plate pulsating heat pipe, the convective heat dissipation area with the air is increased, which is conducive to increasing the temperature difference between the cold and hot ends of the pulsating heat pipe, enhancing the oscillation of the internal working fluid, and finally achieving the effect of enhancing heat transfer.

A first condensation channel 5 is provided at a position corresponding to each row of fins in the first condensation plate 2, and a second condensation channel 5 is provided at a position corresponding to each row of fins in the second condensation plate 3. Condenser 6, the structures of the first condensate 5 and the second condensate 6 are mirror images, and both the first condensate 5 and the second condensate 6 are U-shaped with their openings facing downwards, The condensing plate is respectively provided with filling holes 7 for adding heat-dissipating working fluid into the first condensing channel 5 and the second condensing channel 6 . Preferably: the heat dissipation working medium is any one of methanol, ethanol and acetone/mixed working medium of methanol, ethanol and acetone/nanofluid.

A first hot runner 8 communicating with the first condensation channel 5 is provided on the inner side of the heating plate 1, and the first hot runner 8 is U-shaped with an opening facing the outside of the heating plate 1. The other side of the heating plate 1 is provided with a second hot runner 9 communicating with the second condensation channel 6, and the second flow channel 9 is connected to the first heat flow with respect to the center line of the heating plate 1. The channels 8 are mirror-symmetrically arranged, and the U-shaped bottom walls of the first hot runner 8 and the second hot runner 9 are provided with uneven capillary structures 10 . When the heat-dissipating working medium in the hot runner in the heating plate 1 transforms from a liquid state to absorb heat to a gaseous state, the elbow section of the hot runner has a capillary microstructure 10 surface (can be made into a variety of structures) which is conducive to the formation of bubble cores and increases the working fluid in the heating section. The probability of generating bubbles finally plays the role of enhancing heat transfer. The first hot runner 8 includes an outer hot runner with a larger opening and a plurality of inner hot runners arranged in the outer hot runner with smaller openings, and the same first condensation channel 5 communicates with the outer hot runner and the outer heat flow. The closest inner hot runner or two adjacent inner hot runners.

The heating plate 1, the condensing plate and the heat sink 4 are all metal materials with high thermal conductivity, such as copper or aluminum, which are formed by 3D printing at one time, and there is no need to bend the flat heat pipe to damage the condensation channel or the hot runner. After the formed radiator is evacuated, heat-dissipating working fluid (such as pure or mixed working fluid such as methanol, ethanol, acetone, nanofluid, etc.) is filled into the tube cavity. The heating electronic device conducts heat through the wall of the heating plate to the cooling fluid inside the hot runner on the heating plate. After the cooling fluid absorbs the heat and vaporizes, there is a pressure difference between the heating channel and the condensation channel, thereby driving the cooling fluid from the heating channel to the condensation channel. Flow, the heat dissipation working fluid in the condensing channel releases heat to the heat sink, and finally the cooling medium in the condensing channel changes from a gaseous state to a liquid state, and the liquid cooling medium flows to the hot runner under the action of gravity, and finally forms a one-way cycle reciprocating Movement to prevent "dry burning" phenomenon inside the heating plate and improve the heat transfer performance of the radiator. In addition, when the heating plate 1 is placed horizontally, the condensing plate is placed vertically, which is more conducive to the gravity backflow of the heat dissipation working medium and strengthens the oscillation of the internal heat dissipation working medium. The heat sink can be regarded as two pulsating heat pipes sharing a heating section, and the heat transferred from the chips or components to the heating plate is cooled by the two condensing plates at the same time, which strengthens the cooling effect.

Finally, the radiator can be modularized, and different modules can be selected for array according to the actual heating power, which is convenient for processing and installation.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (5)

1. a flat heat pipe array radiator, comprising a heating plate (1) and a condensation plate, the heating plate (1) is horizontally arranged and used to place heat-generating electronic devices, and the condensation plate comprises a first condensation plate (2) and The second condensing plate (3), the first condensing plate (2) and the second condensing plate (3) are arranged vertically upwards at both ends of the heating plate (1), it is characterized in that the Both sides of the condensing plate are provided with multiple columns of cooling fins (4), and a first condensation channel (5) is provided at a position corresponding to each column of cooling fins in the first condensing plate (2); A second condensation channel (6) is provided at a position corresponding to each row of cooling fins in the second condensation plate (3); the structure of the first condensation channel (5) and the second condensation channel (6) It is mirror image symmetry, and the first condensing channel (5) and the second condensing channel (6) are both in the shape of a U with the opening facing downwards, and the condensing plates are respectively provided with ) and the second condensing channel (6) to add liquid filling holes (7) for cooling refrigerant; A first hot runner (8) connected to the first condensation channel (5) is provided on one side of the heating plate (1), and the first hot runner (8) opens toward the heating plate (1) U-shaped on the outside, on the other side of the heating plate (1), a second hot runner (9) communicating with the second condensation channel (6) is provided, and the second hot runner (9) The central line of the heating plate (1) is mirror-symmetrical to the first hot runner (8), and the first hot runner (8) and the second hot runner (9) An uneven capillary structure (10) is provided on the U-shaped bottom wall. 2. The radiator according to claim 1, characterized in that, the first hot runner (8) comprises an outer hot runner with a larger opening and a plurality of inner hot runners arranged in the outer hot runner with smaller openings, and One of the first condensation passages (5) communicates with the outer hot runner and the inner hot runner that is closer to the outer hot runner or two adjacent inner hot runners. 3. The radiator according to claim 1, characterized in that, the heat dissipation working medium is any one of methanol, ethanol and acetone or a nanofluid. 4. The radiator according to any one of claims 1 to 3, characterized in that, the heating plate (1), the condensation plate and the cooling fins (4) are all made of copper or aluminum. 5. The radiator according to claim 4, characterized in that, the heating plate (1), the condensation plate and the heat sink (4) are formed once by 3D printing.