CN201828174U - Thin plate type low pressure thermosyphon plate driven by pressure gradient - Google Patents

Abstract

A pressure gradient driven thin plate type low pressure thermosyphon plate comprises: the plate body correspondingly covers the body, a heated area is arranged at the position, close to the center, of the body, a pressure accumulation area and a first flow channel group are arranged on two sides of the heated area, the pressure accumulation area is connected with a free area, the free area is further connected with a first condensation area and a second condensation area, the first flow channel group is further connected with a third condensation area and a fourth condensation area, the first condensation area and the third condensation area are provided with a second flow channel group and communicated with the first condensation area and the third condensation area, and the second condensation area and the fourth condensation area are provided with a third flow channel group and communicated with the second condensation area and the fourth condensation area; by means of proper pressure reduction design, a low pressure end is generated to form a pressure gradient required by driving pressure difference to drive vapor-water circulation in the thermosiphon plate, and the working fluid can be driven to transfer heat without any capillary structure.

Description

Thin-plate low-pressure thermosiphon plate driven by pressure gradient

technical field

A pressure gradient-driven thin-plate low-pressure thermosiphon plate, especially a pressure gradient-driven thin-plate low-pressure thermosiphon plate capable of conducting heat without providing a capillary structure and having higher heat transfer efficiency. the

Background technique

In recent years, with the vigorous development of the electronic semiconductor industry, the progress of process technology, and under the trend of market demand, electronic equipment has gradually moved towards thinner and smaller shapes. It is unabated. For example, in the actual operation of notebook computers and desktop computers with the highest output value in the information industry, many electronic components generate heat, among which the CPU (Central Processing Unit) generates the most heat. The heat sink composed of the heat sink and the fan provides heat dissipation function and plays an important role in protecting the CPU, so that the CPU can be maintained at a normal operating temperature to perform its due function. Therefore, the CPU heat sink is an important component in the information industry today. the

的散热技术，所以目前仍然是使用热管来做热转移，然后再使用散热鳍片做热交换的动作，除此之外，也只能尽量降低CPU的耗电功率。有鉴于此，业界无不积极寻找热通量更高的散热技术，以因应接踵而来的庞大散热需求。 Therefore, in recent years, water cooling technology has been widely used in personal computers. Although water cooling technology seems to save the bulky heat sink, it actually collects the heat from the heat source in the system into the working fluid, and then through heat exchange. The heat exchange between the heat exchanger and the air is performed uniformly. Because the length of the pipeline can be changed by itself, the position of the heat exchanger is also relatively flexible, and the design of the heat exchanger (radiating fins) will not be limited by space; however, water cooling The system needs a pump to push the working fluid to flow, and also needs a water storage tank, so the whole system still has pump reliability problems, pipeline leakage problems, etc., but because the heat of the heating components in the personal computer continues to increase , so although the water-cooled heat dissipation technology is not perfect, it is still the best choice for thermal management and control in the market. Computers are different. Notebook computers are getting thinner and smaller, and they cannot use water at all.

So far, heat pipes are still used for heat transfer, and then heat dissipation fins are used for heat exchange. In addition, the power consumption of the CPU can only be reduced as much as possible. In view of this, the industry is actively looking for heat dissipation technologies with higher heat flux to meet the ensuing huge demand for heat dissipation.

In addition, the known technology also uses heat pipes, vapor chambers and other heat dissipation components as heat transfer components. When manufacturing heat pipes and vapor chambers, a sintered body is formed on the inner wall of the heat pipe and vapor chamber, which is used as a capillary structure. The main process is First fill the inner wall with metal (copper) particles or powder, then compact the copper particles or powder, and finally send it into the sintering furnace for sintering, so that the copper particles or powder become porous The capillary structure of the nature makes it possible to obtain capillary force through the sintered body, but because the sintered body has a certain thickness in the volume of the heat pipe and the chamber, it cannot be effectively thinned; in addition, the VC (Vapor chamber) is to use sintered core or grid or groove structure, and then generate capillary force phenomenon to drive the steam-water circulation in heat pipe or VC (Vapor chamber), but the application and manufacturing method of this structure is quite complicated, which increases the manufacturing cost. So very inappropriate. the

Furthermore, the selection of the steam core is a science, and it is very important to choose the appropriate steam core. The steam core must be able to maintain the flow rate of the condensate and maintain sufficient capillary pressure to overcome the influence of gravity. the

Therefore, the heat pipe or VC (Vapor chamber) of the prior art has the following disadvantages:

1. Inconvenient processing;

2. Unable to achieve thinning;

3. High cost;

4. Time-consuming. the

Utility model content

In order to effectively solve the above problems, the main purpose of this invention is to provide a pressure gradient driven thin-plate low-pressure thermosiphon plate that can drive the working fluid to transfer heat without any capillary structure and greatly reduce the manufacturing cost. the

Another purpose of the present invention is to provide a pressure gradient-driven thin-plate low-pressure thermosiphon plate with high heat transfer efficiency. the

In order to achieve the above-mentioned purpose, this invention provides a pressure gradient-driven thin-plate low-pressure thermosiphon plate, which includes: a body and a plate body, the plate body corresponds to cover the aforementioned body, and a heated There is a pressure accumulating area and a first flow channel group on both sides of the heating area, and the pressure accumulating area is connected to a free area, and the free area is further connected to a first condensation area and a second condensation area. The first flow channel The group is further connected to a third condensation area and a fourth condensation area, the first and third condensation areas have a second flow channel group and communicate with the first and third condensation areas, and the second and fourth condensation areas have a The third channel group is connected to the second and fourth condensation areas; through appropriate decompression design, a low-pressure end is generated to form a driving pressure difference to drive the pressure gradient required for the steam-water circulation in the thermosiphon plate without any capillary structure. Those who drive the working fluid to transfer heat and greatly reduce the manufacturing cost. the

Description of drawings

Fig. 1 is the three-dimensional exploded view of the preferred embodiment of the thin-plate low-pressure thermosiphon plate driven by the pressure gradient of this creation;

Fig. 2 is the three-dimensional assembly diagram of the preferred embodiment of the thin-plate low-pressure thermosiphon plate driven by the pressure gradient of this creation;

Fig. 3 is the top view of the body of the preferred embodiment of the thin-plate low-pressure thermosiphon plate driven by the pressure gradient of the present invention;

Fig. 4 is the top view of the body of the second embodiment of the thin-plate low-pressure thermosiphon plate driven by the pressure gradient of this creation;

Figure 5 is a top view of the body of the third embodiment of the thin-plate low-pressure thermosiphon plate driven by the pressure gradient of this creation;

Fig. 6 is the top view of the body of the fourth embodiment of the thin-plate low-pressure thermosiphon plate driven by the pressure gradient of the present invention;

Fig. 7 is a top view of the body of the fifth embodiment of the thin-plate low-pressure thermosiphon plate driven by the pressure gradient of the present invention. the

Description of main component symbols

Body 1 First distance 112

Board 1a Free Zone 12

Heating zone 11 Pressure storage zone 13

Protruding post 111 Pressure accumulator channel 131

Pressure accumulator deflector 132 Second edge 2123

The first condensation zone 14 The second runner group 22

Second Condensation Zone 15 Second Runner 221

The third condensation zone 16 The second guide body 222

The fourth condensation zone 17 The third runner group 23

The first exit 18 The third runner 231

The second exit 19 The third diversion body 232

The first runner group 21 pit 3

The first runner 211 Evaporation bubble 4

First deflector 212 Convex rib 5

First Vertex 2121 First Interval 6

The first cutting edge 2122 The second section 7

Detailed ways

The above-mentioned purpose of this creation and its structural and functional characteristics will be described according to the preferred embodiments of the accompanying drawings. the

Please refer to Figures 1, 2, and 3. As shown in the figure, a preferred embodiment of the pressure gradient-driven thin-plate low-pressure thermosiphon plate is created. The pressure gradient-driven thin-plate low-pressure thermosiphon plate system includes: a body 1, A board body 1a;

The plate body 1a covers the body 1 correspondingly. the

The body 1 has a heat receiving area 11, a first flow channel group 21, a second flow channel group 22, a third flow channel group 23, a free area 12, a pressure accumulation area 13, a first condensation area 14, A second condensation zone 15 , a third condensation zone 16 , and a fourth condensation zone 17 . the

The heated area 11 is set at the center of the main body 1 close to the main body 1, and the two sides of the heated area 11 are respectively connected to the first flow channel group 21 and a pressure accumulation area 13, and the pressure accumulation area 13 has a plurality of pressure accumulation flow channel 131 and a plurality of accumulator guide bodies 132, the accumulator guide bodies are arranged at intervals, the pressure accumulator channels 131 are formed between two pressure accumulator guide bodies 132, and the aforementioned free areas are connected by the pressure accumulator channel 131 12. the

The heat receiving area 11 has a plurality of protruding pillars 111 arranged at intervals, and there is a first distance 112 between the protruding pillars 111. the

The free area 12 is respectively connected to the aforementioned first condensation area 14 and the second condensation area 15 , and the first channel group 21 is connected to the aforementioned third condensation area 16 and fourth condensation area 17 . the

The second channel group 22 is located between the first and third condensation zones 14 and 16 , and is connected to the first and third condensation zones 14 and 16 by the third channel group 22 . the

The third channel group 23 is located between the second and fourth condensation zones 15 and 17 , and is connected to the second and fourth condensation zones 15 and 17 by the third channel group 23 . the

The first flow channel group 21 has a plurality of first flow channels 211 and a plurality of first guide bodies 212, the first guide bodies 212 are arranged at intervals, and the first flow channels 211 are formed between two first guide bodies 212, so The second flow channel group 22 has a plurality of second flow channels 221 and a plurality of second guide bodies 222, the second guide bodies 222 are arranged at intervals, and the second flow channels 221 are formed between two second guide bodies 222 . the

The third flow channel group 23 has a plurality of third flow channels 231 and a plurality of third guide bodies 232, the third guide bodies 232 are arranged at intervals, and the third flow channels 231 are formed in pairs of third guide bodies 232 between. the

The first, second, and third guide bodies 212, 222, and 232 in this preferred embodiment are elongated ribs. the

Please refer to Figure 4, which is the second embodiment of the thin-plate low-pressure thermosyphon plate driven by the pressure gradient of this creation. As shown in the figure, the structure of this embodiment and the relationship between components are the same as those of the previous preferred embodiment. , so it will not be repeated here, but the difference between this embodiment and the previous preferred embodiment is that the first guide body 212 is a rib, and the rib has a first apex angle 2121 and a first edge 2122 and a second edge 2123, the first and second edge 2122, 2123 intersect at the first corner 2121, the first flow channels are formed between the ribs, and between the first guide parts has a first distance. . the

Please refer to Figure 5, which is the third embodiment of the thin-plate low-pressure thermosyphon plate driven by the pressure gradient of this creation. As shown in the figure, the structure of this embodiment and the relationship between components are the same as those of the previous preferred embodiment. , so it will not be repeated here, but the difference between this embodiment and the above-mentioned preferred embodiment is that the body further has a rib 5, and the rib 5 runs through the heat receiving area 11 and the pressure accumulating area 13 and The first runner group 21 . the

Please refer to Figure 6, which is the fourth embodiment of the thin-plate low-pressure thermosyphon plate driven by the pressure gradient of this creation. As shown in the figure, the structure of this embodiment and the relationship between components are the same as those of the previous preferred embodiment. , so I won’t go into details here, but the difference between this embodiment and the above-mentioned preferred embodiment is that the body has a rib 5, a first outlet 18 and a second outlet 19, and the rib 5 runs through it longitudinally. The heat receiving area 11 , the pressure accumulating area 13 and the first runner group 21 define a first section 6 and a second section 7 of the main body 1 . the

Please refer to Figure 7, which is the fifth embodiment of the thin-plate low-pressure thermosyphon plate driven by the pressure gradient of this creation. As shown in the figure, the structure of this embodiment and the relationship between components are the same as those of the previous preferred embodiment. , so it will not be described in detail here, but the difference between this embodiment and the aforementioned preferred embodiment is that there are multiple pits 3 between the first, second, and third runners 211, 221, and 231, and the pits The pit 3 can be circular, square, triangular, fish scale and geometric shape. In the embodiment of this description, the fish scale is used as an illustration, but it is not limited thereto. The aforementioned first, second, third, In the four embodiments, the technical features of the scale-shaped pit 3 of the present embodiment can also be added. the

Please refer to Figure 3 again, as shown in the figure, the preferred embodiment of the invention and the second, third, and fourth embodiments propose a thin-plate low-pressure thermosiphon plate circulation cooling technology driven by two-phase pressure gradients. This method is self-driven Circulation mode, the working fluid used can be any of pure water, methanol, acetone, R134A and other refrigerants, the interior of the thin-plate low-pressure thermosiphon plate driven by pressure gradient is in a vacuum state, so the working fluid filled inside , at 20-30 degrees Celsius is the saturation temperature of the working fluid; the heated area is provided with an array of convex columns 111 to generate superheated steam bubbles 4, which flow through the free area 12 and instantly reduce the pressure, generating the pressure gradient required to drive the steam-water cycle In addition, it is guided by the first, second, third, and fourth condensation zones 14, 15, 16, and 17 through the first, second, and third runner groups, and flows back to the heating zone 11 (that is, the area with the convex column 111), and completes Soda cycle. the

That is to say, the system utilizes the heating area 11 in contact with the heating element (not shown in the figure) to generate superheated steam to establish a drive steam-water cycle, that is, the heat is introduced into the surface of the heating area 11 of the main body 1 and then transferred to the heating area 11 to generate boiling phenomenon and make some parts The working fluid is vaporized, and the pressure generated by the steam bubbles 4 due to superheat (that is, the pressure in the pressure storage area 13 is relatively high) pushes the fluid from the heated area 11 to the free area 12 and then to the first, second, third, and fourth condensation areas 14, 15, 16, 17 dissipate heat, and the condensed working fluid is pressurized back to the heat receiving area 11 by the pressure storage area 13, that is, the heat receiving area 11 where the heat receiving area 11 is in contact with the heating element (not shown in the figure) absorbs heat and then cycle. the

Apply evaporation (pressurization) and condensation (depressurization) to establish the pressure gradient and circulation channel required for vapor-liquid circulation, which can avoid the use of capillary structure, greatly reduce the thickness of VC, and greatly improve the thin-plate low-pressure thermosiphon plate driven by pressure gradient temperature uniformity and reduce thermal resistance. the

In addition, in order to ensure the backflow of the fluid, capillary structures such as mesh can also be added to help the working fluid return to the pressure storage area or the heating area. the

In recent years, major cooling factories have invested a lot of water-cooling technology, especially the active water-cooling technology, which is to generate circulating power for the pump. However, this method is prone to problems with the reliability and life of the pump valve parts. The advantage of the thin-plate low-pressure thermosiphon plate circulation cooling technology driven by the two-phase pressure gradient is that there are no moving parts in the system, so there are no problems such as parts wear and tear, and there is no need for additional pumps and capillary structures, which can save Energy, but also can solve the problem of noise. the

Claims (11)

1. the thin board type low pressure thermal siphon plate of a barometric gradient driving is characterized in that, comprises:

One body, be provided with a heat affected zone near centre, these both sides, heat affected zone have a pressure accumulation district and a first flow group, and this pressure accumulation district connects a free zone, this free zone more connects one first condensing zone and one second condensing zone, this first flow group more connects one the 3rd condensing zone and one the 4th condensing zone, has one second runner group between described first and third condensing zone and is communicated with this first and third condensing zone, and described second, four condensing zones have one the 3rd runner group and are communicated with this second, four condensing zone;

One plate body, correspondence cover aforementioned body.

2. the thin board type low pressure thermal siphon plate of barometric gradient driving according to claim 1 is characterized in that described heat affected zone has plural projection and is distributed in distance, and has one first spacing between these projections.

3. the thin board type low pressure thermal siphon plate of barometric gradient driving according to claim 1, it is characterized in that, described first flow group has plural first flow and plural first baffle, these first baffles are distributed in distance, and this first flow is formed in twos between first baffle, the described second runner group has plural second runner and plural second baffle, these second baffles are distributed in distance, and this second runner is formed in twos between second baffle, described the 3rd runner group has plural number the 3rd runner and plural number the 3rd baffle, these grade in an imperial examination three baffles are distributed in distance, and the 3rd runner is formed in twos between the 3rd baffle.

4. as the thin board type low pressure thermal siphon plate of the barometric gradient driving as described in the claim 3, it is characterized in that described first, second and third baffle is a strip rib.

5. the thin board type low pressure thermal siphon plate of barometric gradient driving according to claim 1 is characterized in that, has plural pit between described these first, second and third runners.

6. as the thin board type low pressure thermal siphon plate of the barometric gradient driving as described in the claim 5, it is characterized in that, described pit be rounded and square and triangle and fish scale shape wherein arbitrary.

7. the thin board type low pressure thermal siphon plate of barometric gradient driving according to claim 1 is characterized in that, has more working fluid in this body, and this working fluid is that pure water and methyl alcohol and acetone and R134A refrigerant are wherein arbitrary.

8. the thin board type low pressure thermal siphon plate of barometric gradient driving according to claim 1, it is characterized in that, this pressure accumulation district has plural pressure accumulation runner and plural pressure accumulation baffle, and these pressure accumulation baffles are distributed in distance, and this pressure accumulation runner is formed in twos between the pressure accumulation baffle.

9. as the thin board type low pressure thermal siphon plate of the barometric gradient driving as described in the claim 3, it is characterized in that, this first baffle is a rib, this rib has one first drift angle and one first sword limit and one second sword limit, described first and second sword limit intersects at this first drift angle, these first flows are formed between these ribs, and have one first spacing between these first diversion divisions.

10. the thin board type low pressure thermal siphon plate of barometric gradient driving according to claim 1 is characterized in that, has more a fin, and this fin vertically runs through this heat affected zone and this pressure accumulation district and this first flow group.

11. the thin board type low pressure thermal siphon plate of barometric gradient driving according to claim 1, it is characterized in that, have more a fin and one first outlet and one second outlet, this fin vertically runs through this heat affected zone and this pressure accumulation district and this first flow group also with this body defining one first interval and one second interval.

Images