CN216592923U - Plate type pulsating heat pipe radiator of condensation end integrated plate type heat exchanger - Google Patents

Abstract

The utility model discloses a plate-type pulsating heat pipe radiator with a condensing end integrated plate-type heat exchanger, which relates to the technical field of heat exchange. It includes a plate type pulsating heat pipe; a branch structure of the condensation section, the branch structure of the condensation section is connected with the plate type pulsating heat pipe; a first cover plate, the first cover plate is connected between the plate type pulsating heat pipe and the branch structure of the condensation section, and the first cover plate is provided with a first Condensation passage, the first cover plate and the plate pulsating heat pipe form a first condensation passage, the first cover plate and the branch structure of the condensation section form a heat flow channel; the second cover plate, the second cover plate is arranged on one side of the branch structure of the condensation section, the second A second condensation passage is arranged on one side of the cover plate, and the second cover plate and the branch structure of the condensation section form a second condensation passage. The utility model provides a plate-type pulsating heat pipe radiator with a condensing end integrated plate-type heat exchanger, which combines the plate-type pulsating heat pipe and the plate-type heat exchanger, and increases the heat exchange area of the radiator on the basis of the plate-type pulsating heat pipe heat exchange.

Description

A plate type pulsating heat pipe radiator with integrated plate heat exchanger at the condensing end

technical field

The utility model relates to the technical field of heat exchange, in particular to a plate-type pulsating heat pipe radiator with a condensing end integrated plate-type heat exchanger.

Background technique

The pulsating heat pipe is a loop capillary filled with working medium. The two ends of the pulsating heat pipe are the heating end and the condensing end, the middle is the adiabatic end, and the inside of the pulsating heat pipe is a vacuum environment. Because the inner diameter of the pulsating heat pipe is small, the working medium is formed in the tube. The form of alternate distribution of steam plug and liquid plug is adopted. When the working medium at the heating end is heated, nucleate boiling will occur on the inner wall of the heating end of the pulsating heat pipe, and small bubbles will be formed. The phenomenon of vapor plug merging and liquid plug splitting will occur; the working fluid at the condensing end releases heat to the environment, and the bubbles rising to the condensing end of the pulsating heat pipe undergo a phase change and heat transfer, changing from a gaseous state to a liquid state. There is a tendency to move towards the heating end. In this way, the pulsating heat pipe forms a pressure difference between the condensing end and the heating end, which drives the working fluid in the pulsating heat pipe to reciprocate between the heating end and the condensing end, and the heat is transferred from the heating end to the condensing end. Heat transfer is achieved.

According to the different shapes, the pulsating heat pipes are divided into plate-type pulsating heat pipes and tubular pulsating heat pipes.

At present, the plate-type pulsating heat pipe used in electronic chips with high heat generation on the market can only dissipate heat in the internal passage of the plate-type pulsating heat pipe when dissipating heat. The limited heat exchange area results in insufficient heat exchange efficiency.

Therefore, it is necessary to provide a plate pulsating heat pipe radiator with integrated plate heat exchanger at the condensing end, which combines the plate pulsating heat pipe with the plate heat exchanger and increases the heat exchange area on the basis of the plate pulsating heat pipe heat exchange.

Utility model content

In order to solve the above-mentioned technical problems, the utility model has adopted the following technical solutions:

A plate type pulsating heat pipe radiator with integrated plate heat exchanger at the condensing end, comprising:

a plate-type pulsating heat pipe, the plate-type pulsating heat pipe includes a base and a pulsating heat pipe microchannel, and the pulsating heat pipe microchannel is arranged on the base;

Condensing section branch structure, the bottom end of the condensation section branch structure is provided with a boss, the boss is connected to the outside of the plate-type pulsating heat pipe, and the side of the condensation section branch structure close to the plate-type pulsating heat pipe is provided with a branch micro aisle;

a first cover plate, a side of the first cover plate close to the plate-type pulsating heat pipe is provided with a first condensation microchannel, and the first cover plate is connected between the plate-type pulsating heat pipe and the branch structure of the condensation section , and is located at the top of the boss, a first condensation passage is formed between the first cover plate and the plate-type pulsating heat pipe, and a heat flow channel is formed between the first cover plate and the branch structure of the condensation section;

A second cover plate, a side of the second cover plate close to the branch structure of the condensation section is provided with a second condensation microchannel, and the second cover plate is connected to the branch structure of the condensation section and away from the first cover plate One side of the second cover plate and the branch structure of the condensation section form a second condensation passage.

Further, the heat flow channel is communicated with the pulsating heat pipe microchannel.

Further, the first condensation passage and the second condensation passage are both perpendicular to the direction of the pulsating heat pipe microchannel, and the cross-sectional shapes of the first condensation microchannel and the second condensation microchannel are rectangular, One of triangle, trapezoid or circle.

Further, the material of the plate-type pulsating heat pipe and the branch structure of the condensation section is selected from one or a combination of copper and aluminum.

Further, it also includes a water inlet header and a water outlet header, the water inlet header and the water outlet header are respectively arranged on both sides of the second cover plate, and the water inlet header is provided with water inlet holes, The water outlet box is provided with a water collection hole, the water inlet hole is connected with the first condensation passage and the second condensation passage, and the water collection hole and the first condensation passage and the second condensation passage are far away from the inlet. One end of the water hole is connected.

Further, through holes are provided on the outer sides of the water inlet header and the water outlet header, and pipelines are installed in the through holes, and the pipelines corresponding to the water inlet header and the water outlet header correspond. The pipeline is connected with a cooling fluid circulating water circuit.

Further, the plate-type pulsating heat pipe microchannels and the heat flow channels are provided with multiple ones, and the widths of the adjacent plate-type pulsating heat pipe microchannels are respectively 1mm and 2mm, and the widths of the adjacent branch microchannels are respectively 1mm and 2mm. .

Further, a liquid-filling hole is provided on one side of the plate-type pulsating heat pipe, and the liquid-filling hole is connected with the vacuum pumping liquid injection device to fill the microchannel of the plate-type pulsating heat pipe with liquid.

Further, the filling working medium in the microchannel of the plate-type pulsating heat pipe is one of ultrapure water, absolute ethanol and nanofluid, and the filling rate is 30%-70%.

The beneficial effects of the present utility model are:

The plate-type pulsating heat pipe radiator with integrated plate-type heat exchanger at the condensing end of the utility model is combined with the feature that the surface of the chip package is flat, and the plate-type pulsating heat pipe and the plate heat exchanger are combined, so that it can be combined with the electronic chip. The close fit can also exert the characteristics of large heat exchange area, small thermal resistance and strong heat exchange capacity of the plate heat exchanger. The condensing end of the plate-type pulsating heat pipe is divided into three parallel structures, which effectively improves its heat exchange capacity, solves the problem of insufficient condensing capacity of the traditional plate-type pulsating heat pipe radiator, and solves the problem of insufficient backflow of liquid working medium from the condensation end to the evaporation end. , effectively improve the performance of the plate-type pulsating heat pipe radiator under high power, and broaden the application range of the plate-type pulsating heat pipe radiator.

Description of drawings

Fig. 1 is an exploded view of a plate-type pulsating heat-pipe radiator of a condensing end integrated plate-type heat exchanger of the present invention.

Fig. 2 is an axonometric view of a plate-type pulsating heat-pipe radiator of a condensing end integrated plate-type heat exchanger of the present invention.

3 is a front view of a plate-type pulsating heat-pipe radiator with an integrated plate-type heat exchanger at the condensing end of the present invention.

4 is a schematic diagram of a first cover plate of a plate-type pulsating heat-pipe radiator of a condensing end integrated plate-type heat exchanger of the present invention.

Fig. 5 is a schematic diagram of the distribution of steam plugs and liquid plugs in a plate pulsating heat pipe radiator of a condensing end integrated plate heat exchanger of the present invention.

Among them, in the figure:

1-plate pulsating heat pipe; 2-branch structure of condensation section; 3-first cover plate; 4-second cover plate; 5-water inlet header; 6-liquid filling hole.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings 1-5 in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not All examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Example 1

1-5, the present embodiment provides a plate-type pulsating heat pipe radiator with an integrated plate-type heat exchanger at the condensing end, including a plate-type pulsating heat pipe 1, a branch structure 2 in the condensation section, a first cover plate 3 and a second cover plate 4, The plate-type pulsating heat pipe 1 includes a base and a pulsating heat pipe micro-channel, the pulsating heat-pipe micro-channel is arranged on the base, and the bottom end of the branch structure 2 of the condensation section is provided with a boss, and the boss is connected to the plate-type pulsating heat pipe. On the outside of the pulsating heat pipe 1 , the branch structure 2 of the condensation section is provided with a branch microchannel on the side close to the plate pulsating heat pipe 1 , and the first cover plate 3 is provided with a first condenser on the side close to the plate pulsating heat pipe 1 . Micro-channel, the first cover plate 3 is connected between the plate-type pulsating heat pipe 1 and the branch structure 2 of the condensation section, and is located at the top of the boss, the first cover plate 3 is connected to the plate-type pulsating heat pipe A first condensation passage is formed between 1, a heat flow channel is formed between the first cover plate 3 and the condensation section branch structure 2, and the second cover plate 4 is provided with a side close to the condensation section branch structure 2. The second condensation microchannel, the second cover plate 4 is connected to the side of the condensation section branch structure 2 away from the first cover plate 3 , and the second cover plate 4 is formed with the condensation section branch structure 2 The second condensing passage; due to the relatively large surface area and volume of the first condensing microchannel and the second condensing microchannel, the contact area between the liquid with a small volume and the first condensing microchannel and the second condensing microchannel is large, At the same time, more heat will be taken away by the cooling fluid, improving the heat exchange efficiency, and the increase of the reflux working medium in the plate-type pulsating heat pipe can avoid the occurrence of dry-out of the evaporation end for a long period of time, especially at high temperature. The normal operation of the plate-type pulsating heat pipe can also be ensured when the power chip generates a large amount of heat.

The heat flow channel is communicated with the microchannel of the pulsating heat pipe, which improves the heat dissipation efficiency of the radiator and makes the high temperature working medium inside the radiator evenly cooled.

Further, the first condensation passage and the second condensation passage are both perpendicular to the direction of the pulsating heat pipe microchannel, and the cross-sectional shapes of the first condensation microchannel and the second condensation microchannel are rectangular, One of a triangle, a trapezoid or a circle; the first condensation passage and the second condensation passage arranged perpendicular to the microchannel of the pulsating heat pipe can improve the heat exchange efficiency of the working fluid in the microchannel of the pulsating heat pipe.

The plate-type pulsating heat pipe microchannels and the heat flow channels are provided with a plurality of them, the widths of the adjacent plate-type pulsating heat pipe microchannels are 1mm and 2mm respectively, and the widths of the adjacent branch microchannels are 1mm and 2mm respectively; As shown in Fig. 5, the above-mentioned width limitation increases the unbalanced pressure difference of the working medium between the adjacent microchannels of the pulsating heat pipe, and increases the pulsating force of the steam plug and the liquid plug. Due to the combined action of gravity, the force of the steam plug and the liquid plug in the channel with a large equivalent diameter and the channel with a small equivalent diameter are different, forming the pressure difference between the steam plug and the liquid plug between adjacent channels, which helps to make it upward Or move downward, when the unbalanced pressure difference is large enough, the pulsation amplitude of the steam plug and the liquid plug will increase, and even cross the elbow into the adjacent channel, forming a large pulsation with a relatively large amplitude. Compared with the traditional pulsating heat pipe using the same equivalent diameter channel, the sensible heat exchange and latent heat exchange are greatly enhanced, and the heat exchange thermal resistance is greatly reduced, and the heat exchange capacity is enhanced.

The material of the plate-type pulsating heat pipe 1 and the branch structure of the condensation section 2 is selected from one or a combination of copper and aluminum. In this embodiment, the plate-type pulsating heat pipe and the branch structure of the condensation section are both made of aluminum.

Further, the plate type pulsating heat pipe radiator of the integrated plate heat exchanger at the condensing end also includes a water inlet header 5 and a water outlet header, and the water inlet header 5 and the water outlet header are respectively arranged in the second On both sides of the cover plate 4, the water inlet header 5 is provided with water inlet holes, the water outlet box is provided with water collection holes, and the water inlet holes are connected with the first condensation passage and the second condensation passage. The water collecting hole is connected to one end of the first condensation passage and the second condensation passage away from the water inlet hole; the water inlet header 5 and the outside of the water outlet header are provided with through holes, and the through holes are There are pipelines installed, and the pipeline corresponding to the water inlet header 5 and the pipeline corresponding to the outlet header are connected with a circulating cooling water circuit; when the cooling work is performed, the circulating cooling water circuit inputs the cooling medium into the water inlet header. , the cooling medium flows through the first condensing microchannel and the second condensing microchannel to achieve heat dissipation to the plate-type pulsating heat pipe and the branch structure 2 of the condensation section. waterway.

As shown in Figure 3, the plate-type pulsating heat pipe 1 consists of the condensation end, the adiabatic end and the heating end in order from top to bottom. In actual use, the plate-type pulsating heat pipe is responsible for transferring heat from the heating end to the adiabatic end and the condensation end in turn. , the fluid flow direction in the first condensing microchannel and the second condensing microchannel respectively set on the first cover plate 3 and the second cover plate 4 is perpendicular to the pulsation direction of the working medium in the plate-type pulsating heat pipe, and the cooling The heat of the pulsating heat pipe and the heat flow channel is taken away.

As an optimization, a liquid-filling hole 6 is provided on one side of the plate-type pulsating heat pipe 1, and the liquid-filling hole 6 is connected with the vacuum pumping liquid injection device to fill the micro-channel of the plate-type pulsating heat pipe, and the micro-channel of the plate-type pulsating heat pipe is filled with liquid. The injection medium is one of ultrapure water, anhydrous ethanol and nanofluid, and the filling rate is 30%-70%. In this example, the injection medium is ultrapure water, and the filling rate is 40%. .

Further, in this embodiment, the plate pulsating heat pipe 1 and the first cover plate 3 , the first cover plate 3 and the condensation section branch structure 2 , the condensation section branch structure 2 and the first cover plate 3 . The two cover plates 4 are sealed by diffusion welding to ensure good sealing performance and no leakage of liquid between adjacent channels.

In the structure of the present invention, the heat flow channel and the pulsating heat pipe microchannel form a plate-type pulsating heat pipe structure, the first condensing passage and the second condensing passage form a plate-type heat exchanger structure, and the plate-type pulsating heat pipe structure and the plate-type heat exchanger structure are both It operates independently, so the fluid flow pressure, flow velocity, fluid type, and even the source and destination of the fluid in the plate heat exchanger structure can be determined according to the actual situation, avoiding the need for the fluid in the traditional plate pulsating heat pipe once it is filled. The unfavorable characteristics that cannot be changed have broadened the application prospect of the utility model in different occasions.

On the basis of not changing the structure of the plate-type pulsating heat pipe, the utility model not only maintains the excellent characteristics of the pulsating heat pipe itself, but also integrates the advantages of the plate-type heat exchanger structure by processing the condensation micro-channels on the condensing end cover plate. In this way, each part can be operated independently, which improves the disadvantage of increased flow resistance caused by the structural change of the plate-type pulsating heat pipe itself, and brings into play the advantages of the two structures.

The utility model discloses a plate-type pulsating heat pipe radiator with a condensing end integrated plate-type heat exchanger combined with the feature that the surface of the chip package is flat, and the plate-type pulsating heat pipe and the plate heat exchanger are combined, so that it can not only closely adhere to the electronic chip Combined, the plate heat exchanger can play the characteristics of large heat exchange area, small thermal resistance and strong heat exchange capacity. The condensing end of the plate-type pulsating heat pipe is divided into three parallel structures, which effectively improves its heat exchange capacity, solves the problem of insufficient condensing capacity of the traditional plate-type pulsating heat pipe radiator, and solves the problem of insufficient backflow of liquid working medium from the condensation end to the evaporation end. , effectively improve the performance of the plate-type pulsating heat pipe radiator under high power, and broaden the application range of the plate-type pulsating heat pipe radiator.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to the above-described embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The utility model provides a plate-type pulsating heat pipe radiator of integrated plate heat exchanger in condensation end which characterized in that includes:

the plate-type pulsating heat pipe comprises a substrate and a pulsating heat pipe micro-channel, and the pulsating heat pipe micro-channel is arranged on the substrate;

the bottom end of the condensation section branch structure is provided with a boss, the boss is connected to the outer side of the plate-type pulsating heat pipe, and one side of the condensation section branch structure, which is close to the plate-type pulsating heat pipe, is provided with a branch micro-channel;

a first cover plate, wherein a first condensation microchannel is arranged on one side of the first cover plate close to the plate-type pulsating heat pipe, the first cover plate is connected between the plate-type pulsating heat pipe and the condensation section branch structure and is positioned at the top end of the boss, a first condensation passage is formed between the first cover plate and the plate-type pulsating heat pipe, and a heat flow passage is formed between the first cover plate and the condensation section branch structure;

and a second condensing micro-channel is arranged on one side, close to the condensing section branch structure, of the second cover plate, the second cover plate is connected to one side, far away from the first cover plate, of the condensing section branch structure, and a second condensing passage is formed by the second cover plate and the condensing section branch structure.

2. The plate type pulsating heat pipe radiator of the condensation end integrated plate heat exchanger as recited in claim 1, wherein said heat flow channel is communicated with said pulsating heat pipe microchannel.

3. The plate type pulsating heat pipe radiator of the condensation end integrated plate heat exchanger as recited in claim 1, wherein the first condensation path and the second condensation path are perpendicular to the direction of the pulsating heat pipe microchannel, and the cross-sectional shape of the first condensation microchannel and the second condensation microchannel is one of rectangular, triangular, trapezoidal or circular.

4. The plate type pulsating heat pipe radiator of the condensation end integrated plate heat exchanger as claimed in claim 1, wherein the material of the plate type pulsating heat pipe and the condensation section branch structure is selected from one or a combination of red copper and aluminum.

5. The plate-type pulsating heat pipe radiator of the condensation-end integrated plate heat exchanger as claimed in claim 1, further comprising a water inlet header and a water outlet header, wherein the water inlet header and the water outlet header are respectively disposed on two sides of the second cover plate, the water inlet header is provided with a water inlet hole, the water outlet header is provided with a water collecting hole, the water inlet hole is connected with the first condensation path and the second condensation path, and the water collecting hole is connected with one ends of the first condensation path and the second condensation path, which are far away from the water inlet hole.

6. The plate-type pulsating heat pipe radiator of the plate-type heat exchanger with the integrated condensation end as claimed in claim 5, wherein through holes are formed in the outer sides of the inlet header and the outlet header, pipelines are installed in the through holes, and a cooling fluid circulation water path is connected to the pipeline corresponding to the inlet header and the pipeline corresponding to the outlet header.

7. The plate-type pulsating heat pipe radiator of the condensation end integrated plate heat exchanger as recited in claim 1, wherein a plurality of plate-type pulsating heat pipe microchannels and a plurality of branch microchannels are provided, the widths of the adjacent plate-type pulsating heat pipe microchannels are 1mm and 2mm, and the widths of the adjacent branch microchannels are 1mm and 2mm, respectively.

8. The plate-type pulsating heat pipe radiator of the plate-type heat exchanger with the integrated condensation end according to claim 1, wherein a liquid filling hole is formed in one side of the plate-type pulsating heat pipe, and the liquid filling hole is connected with a vacuumizing liquid filling device to fill liquid into a microchannel of the plate-type pulsating heat pipe.

9. The plate-type pulsating heat pipe radiator of the condensation-end integrated plate heat exchanger as recited in claim 8, wherein the working medium filled in the microchannel of the plate-type pulsating heat pipe is one of ultrapure water, absolute ethyl alcohol and nanofluid, and the filling rate is 30% -70%.

Images