CN114440675B - Gravity heat pipe with multiple heat release ends communicated - Google Patents

Abstract

The invention provides a gravity assisted heat pipe with multiple heat release ends, which comprises an evaporation part, a condensation part and an insulation part, wherein liquid absorbs heat and evaporates in the evaporation part, enters the condensation part through the insulation part to release heat, and returns to the evaporation part through gravity; the condensing part is provided with a plurality of heat release ends, a communication pipe is arranged between at least two adjacent heat release ends, and the flow area of the communication pipe is continuously reduced from the lower part of the heat release ends to the upper part. The gravity assisted heat pipe with the novel structure can save materials by the arrangement, and the connecting pipe is arranged according to pressure change, so that the pressure balance can be ensured to be achieved as soon as possible in the fluid flowing process.

Description

Gravity heat pipe with multiple heat release ends communicated

Technical Field

The invention relates to a gravity assisted heat pipe, in particular to a gravity assisted heat pipe provided with a temperature equalizing component.

Background

The heat pipe technology is a heat transfer element called a "heat pipe" invented by George Grover (Los Alamos) national laboratory in the United states of Amersham (1963), which fully utilizes the heat conduction principle and the rapid heat transfer property of a phase change medium, and rapidly transfers the heat of a heating object to the outside of a heat source through the heat pipe, and the heat conduction capability of the heat pipe exceeds that of any known metal.

The heat pipe technology is widely applied to the industries of aerospace, military industry and the like before, since the heat pipe technology is introduced into the radiator manufacturing industry, the design thought of the traditional radiator is changed, a single radiating mode of obtaining a better radiating effect by simply relying on a high-air-volume motor is eliminated, the heat pipe technology is adopted to enable the radiator to obtain a satisfactory heat exchanging effect, and a new world of the radiating industry is opened up. At present, the heat pipe is widely applied to various heat exchange equipment, including the nuclear power field, such as the utilization of the waste heat of nuclear power, and the like. On the one hand, the fluid in the heat insulation part is a vapor-liquid two-phase flow mainly comprising vapor in the upward process, so that the fluid in the heat insulation part is a vapor-liquid mixture, and the heat absorption efficiency of the heat insulation part is affected by the existence of the vapor-liquid two-phase flow.

It has been found in the study that, whether the heat absorbing end absorbs heat or the heat insulating part keeps warm, the temperature of the fluid at different positions of the heat insulating part is uneven, for example, the temperature at the position with good heat insulating effect is high, the temperature at the position with poor heat insulating effect is low, the temperature of the fluid at different positions inside the heat insulating part is different, the temperature in the heat insulating part is uneven due to the temperature difference, and therefore, the heat dissipation of the condensation sections at different positions is also different after the fluid enters the heat dissipating end, especially, when a plurality of heat dissipating ends and corresponding heat utilizing parts are involved, the heat absorbing of the heat utilizing parts is uneven due to the difference of the heat dissipating ends, so that the heat utilizing parts are overheated or supercooled, and the operation is influenced. Under the condition of a plurality of heat absorption ends, the heat sources of the heat absorption ends are different, so that the fluid temperatures at different positions of the condensing part of the heat pipe are different, and the overheat or supercooling condition of the heat utilization part is caused, thereby influencing the operation.

The invention improves on the basis of the previous invention to provide a novel gravity assisted heat pipe, thereby solving the problem of uneven temperature of fluid in the heat pipe.

Disclosure of Invention

The invention provides a novel gravity assisted heat pipe, thereby solving the technical problems.

In order to achieve the above object, the technical scheme of the present invention is as follows:

the gravity heat pipe comprises an evaporation part, a condensation part and an insulation part, wherein liquid absorbs heat and evaporates in the evaporation part, enters the condensation part through the insulation part to release heat, and returns to the evaporation part through gravity; the condensing part is provided with a plurality of heat release ends, a communication pipe is arranged between at least two adjacent heat release ends, and the distance between the adjacent communication pipes is continuously increased from the lower part of the heat release ends to the upper part.

Preferably, at the heat release end, the distance between adjacent communication pipes increases from the lower part to the upper part of the heat release end.

Preferably, the heat insulation part is internally provided with a temperature equalizing plate extending from the inner wall of the heat insulation part to the center of the heat insulation part, the temperature equalizing plate comprises a first arc-shaped wall and a second arc-shaped wall extending from the inner wall, wherein an acute angle formed by a tangent line at the joint of the first arc-shaped wall and the inner wall is smaller than an acute angle formed by a tangent line at the joint of the second arc-shaped wall and the inner wall, the first arc-shaped wall and the second arc-shaped wall bend and extend towards the fluid flow direction, the bending direction also faces the fluid flow direction, the intersection point of the first arc-shaped wall and the second arc-shaped wall is positioned at the upper part of the joint of the first arc-shaped wall and the inner wall, and meanwhile, the shape of the temperature equalizing plate is formed by rotating the first arc-shaped wall, the second arc-shaped wall and the inner wall along the axis of the heat insulation part.

Preferably, the cold sources of at least two heat release ends are independent of each other.

Preferably, the first arcuate wall and the second arcuate wall are circular arcs, wherein the circular arc diameter of the first arcuate wall is smaller than the circular arc diameter of the second arcuate wall.

Preferably, the tangent to the first arcuate wall at the location of the intersection forms an angle of 30-60 ° with the axis of the insulation.

Compared with the prior art, the invention has the following advantages:

1) The gravity assisted heat pipe with the novel structure can meet the multi-user requirement on the basis of expanding the heat exchange area through the arrangement of the heat release end, save materials and ensure that the pressure equalization can be achieved as soon as possible in the fluid flowing process by arranging the connecting pipe according to the pressure change.

2) The invention provides a novel gravity assisted heat pipe, wherein a bent temperature equalizing plate is arranged in a heat insulating part, so that a part of fluid is guided to the opposite direction along the flow of the temperature equalizing plate and is fully mixed with fluid entering in the opposite direction, the temperature uniformity of the fluid is realized, the further temperature uniformity is realized, and the service life of a product is prolonged.

3) According to the invention, through widely researching the heat exchange rule caused by the change of each parameter of the temperature equalization plate, the temperature equalization plate structure of the heat exchanger is optimized under the condition of meeting the flow resistance, so that the optimal outlet fluid temperature equalization effect is achieved.

4) According to the invention, through reasonable layout, the temperature equalization plate structures of adjacent rows are arranged in staggered mode, so that the fluid is further fully mixed, and the temperature uniformity is achieved.

5) The invention further promotes the full mixing by setting the distribution change of parameters such as the size, the number angle and the like of the temperature equalization plate along the flowing direction of the fluid.

6) According to the invention, through widely researching the distance of the temperature equalizing plate, a formula of the minimum distance is designed, the temperature equalizing mixing requirement is fully met, the problems of uneven mixing and increased flow resistance are avoided, and the optimal outlet fluid temperature equalizing effect is achieved.

Drawings

FIG. 1 is a schematic diagram of a gravity assisted heat pipe structure according to the present invention.

FIG. 2 is a schematic diagram of the heat-releasing end of the gravity assisted heat pipe structure according to the present invention.

FIG. 3 is an axial sectional view of a heat insulating part provided with a temperature equalizing plate according to the present invention.

FIG. 4 is a schematic view showing the dimensions of a heat insulating portion provided with a temperature equalizing plate according to the present invention.

Fig. 5 is a schematic perspective view of 1 temperature equalizing plate per layer.

Fig. 6 is a schematic perspective view of 3 temperature equalizing plates per layer.

Fig. 7 is a schematic perspective view of 1 temperature equalizing plate per layer.

Fig. 8 is an exploded perspective view of the heat insulating portion side of fig. 7.

FIG. 9 is a schematic view of the heat absorbing end of the gravity assisted heat pipe structure of the present invention.

Fig. 10 is a schematic view of the heat absorbing end of the present invention provided with a communication tube.

FIG. 11 is a schematic view of the heat dissipating end of the communication tube of the present invention.

In the figure: 1. the evaporator, 2, the condenser, 3, the heat insulation, 4, the temperature equalizing plate, 41 the first arc wall, 42 the second arc wall, 43 the intersection point, the heat absorption end 11, the heat release end 21, the communication pipe 6 and the communication pipe 7.

Detailed Description

The following describes the embodiments of the present invention in detail with reference to the drawings.

Herein, "/" refers to division, "×", "x" refers to multiplication, unless otherwise specified.

Fig. 1 illustrates a heat pipe. As shown in fig. 1, the gravity assisted heat pipe comprises an evaporation part 1, a condensation part 2 and an insulation part 3, wherein liquid absorbs heat and evaporates in the evaporation part 1, enters the condensation part 2 through the insulation part 3 to release heat, and then returns to the evaporation part 1 through gravity and/or capillary attraction.

Of course the heat pipe may not be limited to a gravity assisted heat pipe, but may be a Mao Xili heat pipe that passes entirely through capillary suction.

Preferably, the heat insulating part 3 is provided with a heat insulating layer.

Preferably, the heat pipe inner wall is preferably provided with a capillary structure in the heat insulating portion inner wall. By providing a capillary structure, liquid is encouraged to enter the evaporation section as soon as possible.

Preferably, the liquid is ammonia, methanol, acetone or heptane.

Preferably, the condensing unit is inserted into a case, and a medicinal liquid, for example, a medicinal liquid for fumigation and washing is provided in the case. Is used for heating the liquid medicine used for fumigation and washing.

Preferably, as shown in fig. 2, the condensing part has a plurality of heat releasing ends 21.

Preferably, the cold sources of at least two heat release ends are independent of each other. Further preferably, the heat sink is different for each heat release end.

Preferably, as shown in fig. 2, the evaporation unit has a plurality of heat absorbing ends 11, and at least two heat absorbing ends have different heat sources.

Preferably, the heat source is different for each heat sink.

Preferably, the heat insulating portion 3 has a circular structure.

As an improvement, as shown in fig. 3, a temperature equalizing plate 4 extending from an inner wall 51 of the heat insulating part to the center of the heat insulating part is arranged in the heat insulating part 3, the temperature equalizing plate 4 comprises a first arc-shaped wall 41 and a second arc-shaped wall 42 extending from the inner wall, wherein an acute angle formed by a tangent line of a joint of the first arc-shaped wall 41 and the inner wall 51 and the tangent line of a joint of the second arc-shaped wall 42 and the inner wall is smaller than an acute angle formed by a tangent line of a joint of the second arc-shaped wall 42 and the inner wall, the first arc-shaped wall 41 and the second arc-shaped wall 42 are bent and extend towards the fluid flowing direction, and an intersection point 43 of the first arc-shaped wall 41 and the second arc-shaped wall 42 is positioned at the upper part of a joint of the first arc-shaped wall 41 and the inner wall 51 and the upper part of the joint of the second arc-shaped wall 42 and the inner wall. The shape of the temperature equalizing plate 4 is a shape in which the first arc-shaped wall 41 and the second arc-shaped wall 42 and the inner wall are rotated along the heat insulating portion axis.

It is found in the study that, whether the heat absorption end absorbs heat or the heat insulation part keeps warm, the temperature of the fluid at different positions of the heat insulation part is uneven, for example, the temperature at the position with good heat insulation effect is high, the temperature at the position with poor heat insulation effect is low, the temperature of the fluid at different positions inside the heat insulation part is different, the temperature in the heat insulation part is uneven due to the temperature difference, and therefore the heat dissipation of the condensation section at different positions is different after the fluid enters the heat dissipation end, especially, when a plurality of heat dissipation ends and corresponding heat utilization parts are involved, the heat absorption of the heat utilization parts is uneven due to the difference of the heat dissipation ends, and under the condition of a plurality of heat absorption ends, the temperature of the fluid at different positions of the heat pipe condensation part is different due to the difference of the heat source of the heat absorption ends, so that the heat utilization parts are overheated or supercooled, and the operation is influenced.

According to the invention, the temperature equalization plate is arranged in the heat insulation part, so that a part of fluid is guided to the opposite direction along the flow of the temperature equalization plate and is fully mixed with the fluid entering in the opposite direction, thereby realizing the uniform temperature of the fluid, further realizing the uniform temperature of the fluid of the condensation part, realizing the uniform heat exchange, further realizing the heat exchange requirement and prolonging the service life of the product.

According to the invention, the first arc wall and the second arc wall are respectively arranged on the temperature equalizing plate, and by arranging the two arc walls, the fluid disturbance effect is better, the area of the temperature equalizing plate contacting the inner wall is increased, and the stability is improved. And through setting up the second arc wall for fluid that the diversion of face direction was received also can be along the crooked direction motion of second arc wall direction, increase buffering, reduce the flow resistance.

Preferably, the inner wall of the heat pipe, especially the inner wall of the heat insulating part is provided with a pore canal. By providing the aperture, liquid is promoted to enter the evaporation portion as soon as possible. So that the fluid enters the vicinity of the inner wall along the second arc-shaped wall after condensation, and rapidly enters the evaporation part through the pore canal of the inner wall.

Preferably, the first arc-shaped wall 41 and the second arc-shaped wall 42 are circular arcs, wherein the circular arc diameter of the first arc-shaped wall 41 is smaller than the circular arc diameter of the second arc-shaped wall 42.

The first wall and the second wall are arc-shaped, so that the fluid flow resistance is smaller, and the fluid can flow to the other side for mixing easily.

Preferably, the tangent to the first arcuate wall 41 at the location of the intersection point 43 forms an angle of 30-60, preferably 45, with the axis of the insulation. By providing this angle, the fluid can be directed quickly to the opposite upper position, and the flow resistance can be further reduced.

Preferably, as shown in fig. 3, a plurality of layers of temperature equalizing plates 4 are provided on the inner wall of the heat insulating portion along the height direction, and the temperature equalizing plates of adjacent layers are arranged in a staggered manner. Through the staggered distribution of the temperature equalization plates of adjacent rows, the fluid can fully move to opposite positions in the heat insulation part, and the full and uniform mixing is ensured. One for each layer of the isoplates shown in fig. 3. Of course, a plurality of temperature equalizing plates, for example, 3 plates, can be arranged on each layer of the temperature equalizing plates.

Preferably, the distance between the intersection point and the inner wall of the heat insulating portion is 0.3 to 0.5 times, preferably 0.4 times, the diameter of the heat insulating portion. By this arrangement the air is given less flow resistance on a well mixed basis.

Preferably, the length of the first arcuate wall is greater than the length of the second arcuate wall.

Preferably, the total radian of the arc connecting the temperature equalizing plate and the inner wall of the same layer is 150-180 degrees. By this parameter setting, a thorough mixing is ensured when the resistance requirement is met. For example, fig. 3, 5 and 7 show that each layer of temperature equalizing plates is provided with one block, and the total radian of the block is 150-180 degrees. Of course, multiple temperature plates may be provided per layer, for example, three plates may be provided per layer of fig. 5, with a total arc of 150-180 °.

Preferably, the A layer temperature-equalizing plates are arranged in a plurality of blocks, the A temperature-equalizing plates are arranged at intervals, the A temperature-equalizing plates are arranged at equal intervals, the B layer is an adjacent layer of the A layer, and the B layer temperature-equalizing plates are arranged at intervals of the A layer when seen from the flowing direction. Through the temperature equalization plate position complementation of adjacent layer, can make the abundant mutual motion of fluid to opposite position in the adiabatic portion, guarantee intensive mixing. It should be noted that the layer a and the layer B are not specifically and explicitly specified, and A, B merely serves as a distinction between adjacent layers.

Preferably, a plurality of temperature equalization plates are provided on the inner wall of the heat insulating portion in the height direction, and the distribution density of the temperature equalization plates in the height direction is smaller and smaller. Because the mixing degree of the fluid is better and better along with the continuous movement of the fluid, the distribution density is required to be smaller and smaller to lighten the flow resistance, and the temperature equalizing effect achieves basically the same effect on the aspects of reducing the resistance and saving the material cost.

Preferably, the distribution density of the temperature equalizing plate is increased in the height direction. The above effects are the results of a large number of numerical simulations and experimental studies, and the studies show that the law accords with the law of fluid movement, and the temperature equalizing effect achieves the same effect to the extent that the resistance is further reduced and the material cost is saved.

Preferably, a plurality of temperature equalizing plates are provided on the inner wall of the heat insulating portion in the height direction, and the temperature equalizing plates are smaller in size in the height direction. Because the mixing degree of the fluid is better and better along with the continuous movement of the fluid, the size is required to be smaller and smaller to lighten the flow resistance, and the temperature equalizing effect achieves basically the same effect on the aspects of reducing the resistance and saving the material cost.

Preferably, a plurality of temperature equalizing plates are provided on the inner wall of the heat insulating portion in the height direction, and the size of the temperature equalizing plates is increased in the height direction. The above effects are the results of a large number of numerical simulations and experimental studies, and the studies show that the law accords with the law of fluid movement, and the temperature equalizing effect achieves the same effect to the extent that the resistance is further reduced and the material cost is saved.

Through a large amount of numerical simulation and experimental study discovery, the angle and the size of samming board have very big influence to heat transfer and misce bene, samming board and inner wall contained angle are slightly less, can lead to mixing effect variation, lead to equal Wen Banche cun too big moreover, influence flow resistance, the contained angle is slightly big, it is not good to lead to stirring fluid effect, the resistance is grow, mixing effect variation, samming board's interval is too big, can lead to the vortex effect not good, the interval is too little can lead to increasing motion resistance, consequently, this application has obtained nearest samming board structure size optimization relation through a large amount of data simulation and experiments.

Preferably, the length L2 of the first line between the connection point of the first arc wall and the inner wall and the intersection point 43, the length L1 of the second line between the connection point of the second arc wall and the inner wall and the intersection point 43, the acute angle between the first line and the inner wall is A2, the acute angle between the second line and the inner wall is A1, the distance S between adjacent temperature equalizing plates in the flowing direction of the fluid, that is, the distance between the center points of the adjacent temperature equalizing plates in the inner wall, the center point is the midpoint of the connection line between the connection points of the first arc wall, the second arc wall and the inner wall, satisfies the following requirements:

n=a-b Ln (M), where n= (l1+l2)/S, m=sin (A2)/sin (A1); ln is a logarithmic function that is a function of the number of pairs,

0.2697<a<0.2699，0.0830<b<0.0832；

preferably, 0.25< M <0.75,0.29< N <0.36,45< A1<75 °,15< A2<45 °,400< S <550mm,70< L2<130mm,30< L1<90mm.

The optimal design requirements of the temperature equalization plate structure can be realized by the above-mentioned various methods. The above structural optimization formula is a main improvement point of the present invention, is the most effective optimization formula which is researched by a large number of numerical simulations and experiments, and is not common knowledge in the art.

Further preferably, a=0.2698 and b=0.0831.

Preferably, when the included angle formed by the heat insulating portion and the horizontal plane is A, the data can be corrected by increasing the correction coefficient c, namely

c* N=a-b*Ln(M)；c=1/sin(A) ^m Wherein 0.09<m<0.11, preferably m=0.10.

50°<A<90°。

In data simulation and experiments, the distance between the temperature equalizing plates is found to be larger than a certain distance, otherwise, fluid is led to the opposite direction through the last temperature equalizing plate, but if the distance between the temperature equalizing plates is too small, fluid flows across the opposite direction and is not fully filled in the whole pipeline, at the moment, the temperature equalizing plates are arranged, the mixing effect is not achieved, the temperature equalizing plates only play a role of a baffle plate, the mixing guiding effect is not achieved, and the flow resistance can only be increased. Therefore, through a great deal of researches, the design scheme of the minimum space of the temperature equalization plate is provided, and the design method has certain guiding significance for the design of the temperature equalization plate.

The intersection point 43 is a perpendicular point on the inner wall, a line formed by the intersection point and the perpendicular point is a third line, the distance between the connecting point of the first arc-shaped wall and the inner wall and the perpendicular point is H, an acute angle formed by the first line and the third line is A3, an acute angle formed by the tangent line of the first arc-shaped wall at the intersection point position and the axis of the heat insulation part is A4, the inner pipe diameter of the heat insulation part is R, and the distance S is designed in the following way:

(S/H)>a+b*Ln (T)，(S/R) ² >c+d*Ln (T)；

wherein T=sin (A3)/sin (A4), 2.66< a <2.68,17.1< b <17.2,1.976< c <1.978,3.425< d <3.426,

30< a3<70 °,20< a4<60 °; preferably 1.07< T <1.30;

preferably, a=2.67, b=17.15, c=1.977, d= 3.4255;

according to the invention, through a large number of experiments and numerical simulation, the minimum design distance of the temperature equalizing plate is obtained, and the resistance is reduced through the design distance, so that the temperature equalizing plate can be fully mixed.

Preferably, when the included angle formed by the heat insulating portion and the horizontal plane is A, the correction coefficient d, f may be increased to correct the data, that is

( (S/H)/d)>a+b*Ln (T)； ((S/R) ² /f)>c+d*Ln (T)；

d=sin(A) ⁿ Of which 0.085<n<0.098, preferably n=0.092. f=sin (a) ^k Wherein 0.076<k<0.078, preferably k=0.077

50°<A<90°。

Preferably, the flow area of the evaporation portion increases continuously along the direction of fluid flow. The main reasons are as follows: 1) By increasing the flow area of the evaporation portion, the flow resistance can be reduced, so that the vapor evaporated in the evaporation portion continuously moves towards the direction of increasing the flow area, and the circulating flow of the heat pipe is further promoted. 2) Because the liquid is continuously evaporated in the evaporation part along with the continuous flow of the fluid, the volume of the vapor is larger and larger, and the pressure is also larger and larger, the increasing change of the volume and the pressure of the vapor is satisfied by increasing the flow area, and the pressure distribution is uniform as a whole. 3) By increasing the tube diameter of the evaporation portion, the impact phenomenon caused by the increase of the volume of the gas outlet can be reduced.

Preferably, the flow area of the evaporation portion increases in the direction of fluid flow. The amplitude change of the flow area is the result obtained by the applicant through a large number of experiments and numerical simulation, and through the arrangement, the circulating flow of the loop heat pipe can be further promoted, the pressure is uniform as a whole, and the impact phenomenon is reduced.

Preferably, the flow area of the condensing portion is continuously reduced along the direction of fluid flow. The main reasons are as follows: 1) Because along with the continuous flow of the fluid, the steam is continuously condensed in the downcomer, so that the volume of the fluid is smaller and smaller, and the pressure is also smaller and smaller, the increasing change of the volume and the pressure of the fluid is satisfied by reducing the flow area, and the pressure distribution and the heat exchange are uniform as a whole. 2) By reducing the flow area of the condensing part, the material can be saved and the cost can be reduced.

Preferably, the flow area of the condensing portion is continuously reduced in the direction of fluid flow to an increasing extent. The amplitude change of the flow area is the result obtained by the applicant through a large number of experiments and numerical simulation, and through the arrangement, the circulating flow of the loop heat pipe can be further promoted, so that the pressure is uniform as a whole.

Preferably, the evaporation unit heat source may be soil, boiler tail gas, or the like.

Preferably, the condensing unit heat sink is water or air.

Preferably, a plurality of heat absorbing ends are provided, and a connecting pipe 6 is arranged between at least two adjacent heat absorbing ends. In the research, it is found that in the process of absorbing heat by the evaporation part, different heat absorption amounts of heat absorption ends at different positions can occur, so that different pressures or temperatures between the heat absorption ends are caused, and thus, the heat absorption ends are heated too high to cause the service life to be shortened, and once one heat absorption end is in a problem, the whole heat pipe can be out of use. Through a great deal of researches, the invention realizes the communication function by arranging the communication pipes at the adjacent heat absorbing ends, and can lead the fluid in the vertical pipe with high pressure to quickly flow to the heat absorbing end with small pressure under the condition of different pressures caused by different heating of the vertical pipe, thereby keeping the whole pressure balanced and avoiding local overheating or supercooling.

Preferably, a plurality of connecting pipes are provided between adjacent heat absorbing ends from the lower part of the heat absorbing end to the upper part of the heat absorbing end. Through setting up a plurality of logical connecting tubes, can make the fluid constantly balanced pressure in the heat absorption evaporation process, guarantee the pressure balance in the whole heat absorption portion.

Preferably, the distance between adjacent connecting pipes is continuously reduced from the lower part of the heat absorbing end to the upper part of the heat absorbing end. The purpose is to provide more connecting pipes, because the fluid is heated continuously along with the upward flow of the fluid, and the heating in different heat collecting pipes is more and more uneven along with the continuous heating of the fluid, the pressure equalization can be ensured to be achieved as soon as possible in the fluid flow process through the arrangement.

Preferably, the distance between adjacent connecting pipes is gradually decreased from the lower part of the heat absorbing end to the upper part of the heat absorbing end. Experiments show that the pressure equalization can be guaranteed to be achieved more preferably and faster in the fluid flowing process through the arrangement. This is also the best way of communication by a great deal of research on the pressure distribution variation law.

Preferably, the flow area of the communication pipe increases from the lower part of the heat absorbing end to the upper part of the heat absorbing end. The purpose is to ensure a larger communication area because the fluid is heated continuously along with the upward flow of the fluid, and the heating in different heat absorbing ends is more and more uneven along with the continuous heating of the fluid, so that the pressure equalization can be ensured to be achieved as soon as possible in the fluid flow process through the arrangement.

Preferably, the flow area of the communication pipe increases from the lower part of the heat absorbing end to the upper part of the heat absorbing end. Experiments show that the pressure equalization can be guaranteed to be achieved more preferably and faster in the fluid flowing process through the arrangement. This is also the best way of communication by a great deal of research on the pressure distribution variation law.

Preferably, a plurality of heat release ends are provided, and a communication pipe 7 is arranged between at least two adjacent heat release ends. Through the arrangement of the connecting pipe, the heat radiation ends can be prevented from being heated unevenly, the pressure balance between the heat radiation ends of the heat pipe is realized, and the defect caused by the uneven heat radiation ends of different heat radiation ends is avoided.

At the heat release end, the distance between adjacent connecting pipes is continuously increased from the lower part to the upper part of the heat release end. The purpose is to provide fewer connecting pipes and reduce the cost. Because the steam in the heat pipe continuously releases heat and condenses along with the upward lower part of the heat release end, the pressure in the heat pipe is smaller and smaller along with the continuous heat release of the fluid, and the uneven phenomenon is also eased and eased, so that the material can be saved by the arrangement, the connecting pipe is arranged according to the pressure change, and the pressure equalization can be ensured to be achieved as soon as possible in the fluid flowing process.

Preferably, at the heat release end, the distance between adjacent communication pipes increases from the lower part to the upper part of the heat release end. Experiments show that the pressure equalization can be guaranteed to be achieved more preferably and faster in the fluid flowing process through the arrangement. This is also the best way of communication by a great deal of research on the pressure distribution variation law.

Preferably, at the heat release end, the flow area of the communication pipe is gradually reduced from the lower part of the heat release end toward the upper part. This purpose is to reduce the cost by ensuring a reduced communication area. The same principle as the increasing distance from the front.

Preferably, the flow area of the communication pipe is gradually decreased in the heat radiation end from the lower part to the upper part. Experiments show that the pressure equalization can be guaranteed to be achieved more preferably and faster in the fluid flowing process through the arrangement. This is also the best way of communication by a great deal of research on the pressure distribution variation law.

While the invention has been described in terms of preferred embodiments, the invention is not so limited. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.

Claims (5)

1. The gravity heat pipe comprises an evaporation part, a condensation part and an insulation part, wherein liquid absorbs heat and evaporates in the evaporation part, enters the condensation part through the insulation part to release heat, and returns to the evaporation part through gravity; the condensing part is provided with a plurality of heat release ends, a communication pipe is arranged between at least two adjacent heat release ends, and the flow area of the communication pipe is continuously reduced from the lower part of the heat release ends to the upper part; the heat insulation part is internally provided with a temperature equalization plate extending from the inner wall of the heat insulation part to the center of the heat insulation part, the temperature equalization plate comprises a first arc-shaped wall and a second arc-shaped wall extending from the inner wall, wherein an acute angle formed by a tangent line at the joint of the first arc-shaped wall and the inner wall is smaller than an acute angle formed by a tangent line at the joint of the second arc-shaped wall and the inner wall, the first arc-shaped wall and the second arc-shaped wall bend and extend towards the fluid flow direction, the bending direction also faces the fluid flow direction, the intersection point of the first arc-shaped wall and the second arc-shaped wall is positioned at the upper part of the joint of the first arc-shaped wall and the inner wall, and the shape formed by rotating the first arc-shaped wall, the second arc-shaped wall and the inner wall along the axis of the heat insulation part.

2. The gravity assisted heat pipe of claim 1, wherein the flow area of the connecting pipe is gradually reduced from the lower portion to the upper portion of the heat release end.

3. The gravity assisted heat pipe of claim 1, wherein the cold sources of the at least two heat dissipating ends are independent of each other.

4. The gravity assisted heat pipe of claim 1, wherein the first arcuate wall and the second arcuate wall are circular arcs, wherein a circular arc diameter of the first arcuate wall is smaller than a circular arc diameter of the second arcuate wall.

5. A gravity assisted heat pipe according to claim 1 wherein the tangent to the first arcuate wall at the location of the intersection forms an angle of 30-60 ° with the axis of the insulating portion.

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