CN113237365A - Triangular resistance-reducing gravity heat pipe - Google Patents

Abstract

The invention provides a gravity heat pipe which comprises an evaporation part, a condensation part and a heat insulation part, wherein liquid absorbs heat and evaporates in the evaporation part, an acute angle formed by a first straight line wall and an inner wall is smaller than an acute angle formed by a second straight line wall and the inner wall, a plurality of layers of temperature equalizing plates are arranged on the inner wall of the heat insulation part along the direction from bottom to top, communication holes penetrating through the first straight line wall and the second straight line wall along the fluid flowing direction are arranged on the first straight line wall and the second straight line wall, and the communication holes extend towards the center direction of the heat insulation part along the direction from bottom to top. The invention provides a novel gravity heat pipe, which is characterized in that the communicating holes are arranged, so that part of fluid can directly flow through the communicating holes, the flow resistance is reduced, and the communicating holes extend towards the center direction of the heat insulation part, so that the fluid directly flows towards the center direction of the heat insulation part and is fully mixed with the fluid on the other side of the center, and the mixing and temperature equalizing effects of the fluid can be well realized.

Description

Triangular resistance-reducing gravity heat pipe

Technical Field

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

Background

The heat pipe technology was Ross Alamos (Los Alamos) in 1963National laboratoryGeorge Grover, a heat transfer called "heat pipe" of the inventionComponentThe heat conduction principle and the quick heat transfer property of the phase change medium are fully utilized, the heat of a heating object is quickly transferred to the outside of a heat source through the heat pipe, and the heat conduction capability of the heat pipe exceeds the heat conduction capability of any known metal.

The heat pipe technology is widely applied to the industries of aerospace, military industry and the like, and since the heat pipe technology is introduced into the radiator manufacturing industry, the design idea of the traditional radiator is changed for people, the single heat radiation mode that a high-air-volume motor is used for obtaining a better heat radiation effect is avoided, the heat pipe technology is adopted for enabling the radiator to obtain a satisfactory heat exchange effect, and a new place in the heat radiation industry is opened up. At present, the heat pipe is widely applied to various heat exchange devices, including the field of nuclear power, such as the utilization of waste heat of nuclear power. On the one hand, the fluid in the heat insulation part is generally a vapor-liquid two-phase flow with the vapor as the main part in the upward process, so that the fluid in the heat insulation part is a vapor-liquid mixture, and the existence of the vapor-liquid two-phase flow affects the heat absorption efficiency of the heat insulation part.

In the research, it is found that the temperature of the fluid at different positions of the heat insulation part is not uniform no matter what the heat absorption end absorbs heat or the heat insulation part keeps the heat, for example, the side with good heat insulation effect has high temperature, the position with poor heat insulation effect has low temperature, the temperature of the fluid at different positions in the heat insulation part is different, the temperature in the heat insulation part is not uniform due to different temperatures, so that the heat dissipation of the condensation sections at different positions is also different after entering the heat release end, especially when a plurality of heat release ends and corresponding heat utilization parts are involved, the heat absorption of the heat utilization parts caused by the difference of the heat release ends is not uniform, the heat utilization parts are overheated or overcooled, and the operation is affected. Under the condition that a plurality of heat absorption ends are arranged, the different heat sources of the heat absorption ends cause different fluid temperatures at different positions of a condensation part of the heat pipe, so that the heat utilization part is overheated or overcooled, and the operation is influenced.

In view of the above problems, the prior patent of the applicant provides a new gravity heat pipe, thereby solving the problem of uneven temperature of the fluid inside the heat pipe.

The application is an improvement to the prior application, and the application enables the flow resistance of fluid in the heat pipe to be reduced and the temperature equalizing effect to be optimal by improving the optimization of the prior application structure.

Disclosure of Invention

The present invention provides a new gravity assisted heat pipe to solve the foregoing problems.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a gravity heat pipe comprises an evaporation part, a condensation part and a heat insulation part, wherein liquid absorbs heat and evaporates in the evaporation part, enters the condensation part through the heat insulation part to release heat, and then returns to the evaporation part through gravity; the heat insulation structure is characterized in that a temperature-equalizing plate extending from the inner wall of the heat insulation part to the center of the heat insulation part is arranged in the heat insulation part, the temperature-equalizing plate comprises a first straight line wall and a second straight line wall extending from the inner wall, wherein an acute angle formed by the first straight line wall and the inner wall is smaller than an acute angle formed by the second straight line wall and the inner wall, the first straight line wall and the second straight line wall extend towards the flowing direction of fluid, the intersection point of the first straight line wall and the second straight line wall is positioned at the upper part of the connection part of the first straight line wall and the inner wall and is positioned at the upper part of the connection part of the second straight line wall and the inner wall, and the shape of the temperature-equalizing plate is formed by the first straight line wall, the second straight line wall and the inner wall rotating along the axis of the heat insulation part; the first and second straight walls are provided with communication holes that penetrate the first and second straight walls in the fluid flow direction, and the communication holes extend in the direction from the bottom to the top toward the center of the heat insulating portion. Preferably, the inner wall of the heat insulation part is provided with a duct.

Preferably, the condensing part has a plurality of heat radiating ends.

Preferably, the heat sink of at least two heat release ends is independent of each other.

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

1) the invention provides a novel gravity heat pipe, which is characterized in that the communicating holes are arranged, so that part of fluid can directly flow through the communicating holes, the flow resistance is reduced, and the communicating holes extend towards the center direction of the heat insulation part, so that the fluid directly flows towards the center direction of the heat insulation part and is fully mixed with the fluid on the other side of the center, and the mixing and temperature equalizing effects of the fluid can be well realized.

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

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

4) According to the invention, through reasonable layout, the temperature equalizing plates of adjacent rows are arranged in a staggered manner, so that fluid is further fully mixed, and the temperature is uniform.

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 equalizing plate along the flowing direction of the fluid.

6) According to the invention, the distance of the temperature-equalizing plate is widely researched, 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 view of the gravity assisted heat pipe configuration of the present invention;

FIG. 2 is a schematic view of the heat releasing end of the gravity assisted heat pipe structure of the present invention;

FIG. 3 is an axial sectional view of the vapor chamber provided in the heat insulating part according to the present invention;

fig. 4 is a schematic size diagram of the thermal insulation part temperature equalization plate according to the present invention.

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

Fig. 6 is a schematic perspective view of 3 temperature equalization plates disposed in each layer.

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

Fig. 8 is an exploded perspective view of the heat insulation part 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 sink end of the present invention with the feedthrough disposed;

FIG. 11 is a schematic view of the heat-releasing end of the present invention with a through-connection tube.

FIG. 12 is a schematic cross-sectional view of a vapor chamber provided with communication holes.

In the figure: 1. an evaporation part, 2, a condensation part, 3, a heat insulation part, 4, a temperature equalizing plate, 41 a first straight line wall, 42 a second straight line wall, 43 intersection points, a heat absorption end 11, a heat release end 21, a communication pipe 6 and a communication pipe 7

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings.

In this document, "/" denotes division and "×", "denotes multiplication, referring to formulas, if not specifically stated.

Fig. 1 shows a heat pipe. As shown in fig. 1, the gravity assisted heat pipe includes an evaporation portion 1, a condensation portion 2, and a heat insulation portion 3, and the liquid absorbs heat and evaporates in the evaporation portion 1, enters the condensation portion 2 through the heat insulation portion 3 to release heat, and then returns to the evaporation portion 1 by gravity and/or capillary force.

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

Preferably, the heat insulating layer is provided outside the heat insulating part 3.

Preferably, the capillary structure is arranged on the inner wall of the heat pipe, preferably the inner wall of the heat insulation part. By arranging the capillary structure, the liquid is promoted to enter the evaporation part as soon as possible.

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

Preferably, the condensation portion is inserted into a casing, and a medicinal liquid, for example, a medicinal liquid for fumigation is provided in the casing. Is used for heating the liquid medicine for fumigation.

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

The heat sink as preferably at least two heat emitting ends are independent of each other. Further preferably, the heat sink of each heat emitting end is different.

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

Preferably, the heat source at each heat sink end is different.

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

As a modification, 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 provided in the heat-insulating part 3, and the temperature-equalizing plate 4 includes a first straight wall 41 and a second straight wall 42 extending from the inner wall, wherein the acute angle formed by the first straight wall 41 and the inner wall is smaller than the acute angle formed by the second straight wall 42 and the inner wall, the first straight wall 41 and the second curved wall 22 extend in the fluid flow direction, and the intersection point 43 of the first straight wall 21 and the second straight wall 42 is located downstream of the junction of the first straight wall 41 and the inner wall 51 and downstream of the junction of the second straight wall 42 and the inner wall. The shape of the temperature equalization plate 4 is a shape formed by rotating the first and second linear walls 41 and 42 and the inner wall along the axis of the heat insulation portion.

The invention provides a heat insulation part, wherein the heat insulation part is internally provided with the temperature equalizing plate, so that a part of fluid flows along the temperature equalizing plate and is guided to the opposite direction, and the fluid is fully mixed with the fluid entering in the opposite direction, thereby realizing uniform temperature of the fluid, realizing the requirement of further heat exchange and prolonging the service life of a product. And through setting up the second straight line wall, the gradient of second straight line wall is little moreover for fluid that the opposite direction water conservancy diversion came over also can be along the rotatory motion of second straight line wall direction, increases the buffering, reduces flow resistance.

The temperature-equalizing plate is provided with the first linear wall and the second linear wall respectively, the two linear walls are arranged, so that the fluid disturbance effect is better, the area of the temperature-equalizing plate contacting the inner wall is increased, and the stability is improved.

In operation, it has been found that by providing a straight wall, the flow resistance of the fluid is increased, and the present application therefore improves on this.

As a modification, as shown in fig. 12, the communication holes 10 penetrating the first and second straight walls 41 and 42 in the fluid flow direction are provided in the first and second straight walls 41 and 42, and preferably, the communication holes 10 extend toward the center of the heat insulating portion in the fluid flow direction (from bottom to top).

Through setting up the intercommunicating pore for some fluid can directly flow through the intercommunicating pore, has reduced flow resistance, and because the intercommunicating pore extends towards the central direction of adiabatic portion 4, thereby makes the fluid directly flow to the direction of adiabatic portion center, and the opposite side fluid intensive mixing that is located the center, the even temperature effect of fluidic mixture of realization that also can be fine.

As a modification, the diameter of the communication hole of the single first straight wall 41 and/or second straight wall 42 becomes larger from the inner wall of the heat insulating portion 4 to the center. By providing the communication holes with a larger diameter, the flow area of the communication holes is increased, and the air flow rate increases toward the center, so that the fluid is more likely to be sufficiently mixed with the fluid on the other side in the heat insulating part, and the flow resistance can be further reduced.

As a modification, the communicating holes of the single first straight wall 41 and/or second straight wall 42 are increased in the larger and larger diameter from the inner wall of the heat insulating portion 4 to the center. Through the arrangement, the fluid can be fully mixed and equalized in temperature, and the flow resistance can be further reduced.

As a modification, the distribution density of the communication holes of the single first straight wall 41 and/or second straight wall 42 becomes larger from the inner wall of the heat insulating portion 4 to the center. By providing a larger distribution density of the communication holes, the flow area of the communication holes becomes larger, and the air flow rate becomes larger toward the center, so that the fluid is more likely to be sufficiently mixed with the fluid on the other side in the heat insulating part, and the flow resistance can be further reduced.

As a modification, the distribution density of the communication holes of the single first straight wall 41 and/or second straight wall 42 increases in an increasing magnitude from the inner wall of the heat insulating portion 4 to the center. Through the arrangement, the fluid can be fully mixed and equalized in temperature, and the flow resistance can be further reduced.

As a modification, the diameter of the communication holes of the different first and/or second straight walls 41 and 42 becomes larger and larger along the direction of fluid flow within the heat insulating portion 4 (from the bottom to the top). The diameter through setting up the intercommunicating pore is bigger and bigger for the flow area of intercommunicating pore is bigger and bigger, thereby makes flow resistance littleer and smaller, because preceding intercommunicating pore is small in quantity moreover, thereby makes the fluid carry out intensive mixing samming in the front more, keeps little flow resistance behind the abundant condition of samming, reduces the operation power consumption.

As a modification, the communicating holes of the different first and/or second straight walls 41, 42 have a larger and larger diameter in the direction of fluid flow within the heat insulating portion 4 (from the bottom to the top). Through the arrangement, the fluid can be fully mixed and equalized in temperature, the flow resistance can be further reduced, and the energy consumption is reduced.

As a modification, the distribution number of the communication holes of the different first and/or second straight walls 41 and 42 is more and more in the fluid flow direction (from the bottom to the top direction) inside the heat insulating portion 4. The distribution quantity through setting up the intercommunicating pore is more and more for the flow area of intercommunicating pore is bigger and more, thereby makes flow resistance littleer and more, and because preceding intercommunicating pore is small in quantity moreover, thereby makes the fluid carry out intensive mixing samming in the front more, keeps little flow resistance under the abundant condition of samming behind, reduces the operation power consumption.

As a modification, the distribution number of the communication holes of the different first and/or second straight walls 41 and 42 increases more and more along the fluid flow direction (from the bottom to the top direction) in the heat insulating portion 4. Through the arrangement, the fluid can be fully mixed and equalized in temperature, the flow resistance can be further reduced, and the energy consumption is reduced.

Preferably, the first rectilinear wall 41 at the location of the intersection point 43 forms an angle of 30-60 deg. with the axis of the insulating portion, preferably 45 deg.. By providing this angle, fluid can be quickly directed to the opposite downstream location, and flow resistance can be further reduced.

Preferably, as shown in fig. 3, a plurality of temperature-equalizing plates 4 are provided on the inner wall of the heat-insulating part 5 in the height direction, and the temperature-equalizing plates of adjacent layers are arranged in a staggered manner. Through the staggered distribution of the temperature equalizing plates in the adjacent rows, the fluids can fully move to opposite positions mutually in the heat insulation part, and the full and uniform mixing is ensured. For example, fig. 3, 5, and 7 show one block per layer of vapor chamber, which has a total arc of 150 and 180 degrees. Of course, multiple temperature equalization plates can be arranged on each layer, for example, three plates are arranged on each layer in the figure 6, and the total arc is 150 and 180 degrees.

Preferably, the distance between the intersection point and the inner wall of the heat insulating part is 0.3 to 0.5 times, preferably 0.4 times, the diameter of the heat insulating part. With this arrangement, the air has less flow resistance on thorough mixing.

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

Preferably, the total radian of the circular arc connecting the uniform temperature plate and the inner wall in the same layer is 150-180 degrees. This parameter set ensures thorough mixing while meeting the resistance requirements. For example, fig. 2 shows that one is provided for each layer of the vapor chamber, and the total arc of the one is 150 and 180 degrees. Of course, each layer of the temperature-uniforming plate can be provided with a plurality of blocks, for example, 3 blocks with a total arc of 150 and 180 degrees are provided.

Preferably, the temperature-equalizing plates on the layer A are arranged in a plurality of blocks, intervals are arranged among the temperature-equalizing plates on the layer A, the temperature-equalizing plates on the layer A are arranged at equal intervals, the layer B is an adjacent layer of the layer A, and the temperature-equalizing plates on the layer B are arranged at the intervals of the layer A when viewed from the flowing direction. Through the complementation of the positions of the temperature equalizing plates of the adjacent layers, the fluids can fully move to the opposite positions mutually in the heat insulation part, and the full and uniform mixing is ensured. It should be noted that the layer a and the layer B are not specifically designated herein, and A, B is only used as a distinction and is used as an adjacent layer.

Preferably, a plurality of temperature equalization plates are provided on the inner wall of the heat insulating section in the height direction, and the distribution density of the temperature equalization plates becomes smaller in the height direction. 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 so as to reduce the flow resistance, and the temperature equalizing effect achieves the basically same effect on the aspects of reduced resistance and material cost saving.

Preferably, the distribution density of the temperature equalization plates is increased in a smaller and smaller range along the height direction. The effect is obtained through a large number of numerical simulation and experimental research results, and the research finds that the rule accords with the rule of fluid motion, and the temperature equalizing effect achieves the basically same effect on the aspects of further reduction of resistance and saving of material cost.

Preferably, a plurality of temperature equalization plates are provided on the inner wall of the heat insulating section in the height direction, and the size of the temperature equalization plates becomes smaller 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 reduce the flow resistance, and the temperature equalizing effect achieves the same effect in the aspects of reducing the resistance and saving the material cost.

Preferably, a plurality of temperature equalization plates are provided on the inner wall of the heat insulating section in the height direction, and the size of the temperature equalization plate is gradually reduced in the height direction. The effect is obtained through a large number of numerical simulation and experimental research results, and the research finds that the rule accords with the rule of fluid motion, and the temperature equalizing effect achieves the basically same effect on the aspects of further reduction of resistance and saving of material cost.

Through a large amount of numerical simulation and experimental study discovery, the angle and the size of temperature-uniforming plate have very big influence to heat transfer and misce bene, temperature-uniforming plate and inner wall contained angle are on the small side, can lead to the mixed effect variation, and lead to the temperature-uniforming plate oversize, influence the flow resistance, the contained angle is on the large side, lead to stirring the fluid effect not good, the resistance grow, the mixed effect variation, the interval of temperature-uniforming plate is too big, can lead to the vortex effect not good, interval undersize can lead to increasing the movement resistance, consequently, this application has obtained nearest temperature-uniforming plate structure size optimization relation through a large amount of data simulation and experiments.

Preferably, the length L2 of the first straight wall, the length L1 of the second straight wall, the acute angle between the first line and the inner wall is a2, the acute angle between the second line and the inside is a1, the distance S between the adjacent temperature equalization plates in the fluid flow direction (for example, the distance between two adjacent temperature equalization plates on the left side of fig. 3 is S), that is, the distance between the center points of the adjacent temperature equalization plates on the inner wall, and the center point is the middle point of the connecting line of the connecting points of the first straight wall, the second straight wall and the inner wall, meets the following requirements:

n-a-b ln (M), wherein N ═ (L1+ L2)/S, M ═ sin (a2)/sin (a 1); ln is a function of the logarithm of the number,

0.3218<a<0.3230，0.1284<b<0.1286；

preferably, 0.25< M <0.75,0.34< N <0.44,45< a1<75 °, 15< a2<65 °,350< S <500mm, 70< L2<130mm, 30< L1<90 mm.

The optimal design requirements of the structure of the temperature equalization plate can be met by the above formulas. The structural optimization formula is a main improvement point of the invention, is the most optimized formula which is researched by a large number of numerical simulations and experiments, and is not common knowledge in the field.

More preferably, a is 0.3219 and b is 0.1285.

Preferably, when the angle formed by the adiabatic part and the horizontal plane is a, the data can be corrected by increasing the correction coefficient c, that is, by increasing the correction coefficient c

c N-b ln (m); c is 1/sin (a) m, wherein 0.09< m <0.11, preferably m is 0.10.

30°<A<90°。

In data simulation and experiments, the fact that the distance between the temperature equalizing plates must be larger than a certain distance, otherwise, fluid can be guided to the opposite direction through the previous temperature equalizing plate, if the distance between the temperature equalizing plates is too small, the fluid can flow in the opposite direction, the whole pipeline is not fully filled, the temperature equalizing plates are arranged at the moment, the mixing effect cannot be achieved, the temperature equalizing plates only play a role of a baffle plate, the mixing is not guided, and only the flow resistance can be increased. Therefore, the design scheme of the minimum distance of the temperature-equalizing plate is provided through a large amount of research, and the design of the temperature-equalizing plate has certain guiding significance.

The perpendicular point of the intersection point 43 on the inner wall, the line formed by the intersection point and the perpendicular point is a third line, the distance between the connecting point of the first straight line wall and the inner wall and the perpendicular point is H, the inner pipe diameter of the heat insulation part is R, and the distance S is designed in the following way:

S>＝a*H+b*((H)²+R²)^(1/2)；

therein 2.38<a<3.18,

1.432<c<1.443，

Preferably, a is 2.78, c is 1.437;

according to the invention, through a large number of experiments and numerical simulation, the minimum design distance of the temperature-uniforming plate is obtained, and the resistance is reduced through the design distance, and meanwhile, the full mixing can be realized.

Preferably, when the angle formed by the adiabatic part and the horizontal plane is a, the data may be corrected by increasing the correction coefficient d, that is, by increasing the correction coefficient d

S/d>＝a*H+b*((H)²+R²)^(1/2)(ii) a d ═ sin (A) n, where 0.093<n<0.105, preferably n-0.099.

Preferably 30 ° < a <90 °.

Preferably, the flow area of the evaporation portion is continuously increased along the direction in which the fluid flows. The main reasons are as follows: 1) the flow resistance can be reduced by increasing the flow area of the evaporation part, so that the vapor evaporated in the evaporation part 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 flowing of the fluid, the volume of the steam is larger and larger, and the pressure is also larger and larger, the continuously increased volume and pressure change of the steam is met by increasing the flow area, and the pressure distribution is uniform on the whole. 3) By increasing the pipe diameter of the evaporation part, the impact phenomenon caused by the increase of the volume of the steam outlet can be reduced.

Preferably, the flow area of the evaporation portion is continuously increased in a direction along which the fluid flows to have a larger and larger extent. The amplitude change of the flow area is a result obtained by a large number of experiments and numerical simulation by the applicant, and through the arrangement, the circulating flow of the loop heat pipe can be further promoted, the pressure is integrally uniform, and the impact phenomenon is reduced.

Preferably, the flow area of the condensation section decreases continuously along the direction of fluid flow. The main reasons are as follows: 1) because steam is continuously condensed in the downcomer along with the continuous flowing of the fluid, the volume of the fluid is smaller and smaller, and the pressure is also smaller and smaller, so that the continuously increased volume and pressure changes of the fluid are met by reducing the flow area, the pressure distribution is uniform on the whole, and the heat exchange is uniform. 2) Through the reduction of the flow area of the condensation part, materials can be saved, and the cost is reduced.

Preferably, the flow area of the condensation section decreases more and more in the direction of fluid flow. The amplitude change of the flow area is a result obtained by a large number of experiments and numerical simulation by the applicant, 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 heat source of the evaporation unit may be soil, boiler exhaust gas, or the like.

Preferably, the cold source of the condensation part is water or air.

Preferably, the heat absorbing end is provided with a plurality of heat absorbing ends, and a communication 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 in the evaporation part, different heat absorption amounts of the heat absorption ends at different positions can occur, so that the pressure or the temperature between the heat absorption ends is different, thus causing over-high heating of part of the heat absorption ends and shortening the service life, and once one heat absorption end has a problem, the problem that the whole heat pipe cannot be used can be caused. According to the invention, through a large amount of research, the communication pipe is arranged at the adjacent heat absorption ends to realize the communication function, and under the condition that the vertical pipes are heated differently to cause different pressures, the fluid in the vertical pipe with large pressure can rapidly flow to the heat absorption end with small pressure, so that the overall pressure balance is maintained, and the local overheating or overcooling is avoided.

Preferably, a plurality of communication pipes are provided between adjacent heat absorbing ends from the lower portion of the heat absorbing end toward the upper portion of the heat absorbing end. Through setting up a plurality of intercommunicating duct, can make fluid at the continuous balanced pressure of heat absorption evaporation process, guarantee the pressure balance in the whole heat absorption portion.

Preferably, the distance between adjacent ones of the communication tubes decreases from the lower portion of the heat absorbing end to the upper portion of the heat absorbing end. The purpose is to arrange more communication pipes, because the fluid is continuously heated 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, so that the pressure balance can be ensured to be achieved as soon as possible in the flowing process of the fluid through the arrangement.

Preferably, the distance between adjacent communication pipes decreases from the lower portion of the heat absorbing end to the upper portion of the heat absorbing end to a greater extent. Experiments show that the arrangement can ensure that the pressure balance is achieved more optimally and more quickly in the fluid flowing process. This is also the best way of communicating by extensively studying the law of change of the pressure distribution.

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

Preferably, the flow area of the communication pipe increases from the lower portion of the heat absorption end to the upper portion of the heat absorption end to a larger extent. Experiments show that the arrangement can ensure that the pressure balance is achieved more optimally and more quickly in the fluid flowing process. This is also the best way of communicating by extensively studying the law of change of the pressure distribution.

Preferably, the heat radiating end is plural, and the communication pipe 7 is provided between at least two adjacent heat radiating ends. Through setting up the UNICOM's pipe, can avoid between the end of sending out heat to be heated inhomogeneous, realize the pressure equilibrium between the end of sending out heat of heat pipe, avoid the defect that the inhomogeneous results in of being heated between the different end of sending out heat.

At the heat release end, the distance between adjacent communication pipes increases from the lower part of the heat release end to the upper part. The purpose is to provide fewer through pipes and reduce the cost. Because the lower part of the heat release end is upward, the steam in the heat pipe continuously releases heat and condenses, and the pressure in the heat pipe is smaller and smaller along with the continuous heat release of the fluid, the phenomenon of non-uniformity is more and more alleviated, therefore, by the arrangement, the material can be saved, the communicating pipe is arranged according to the pressure change, and the pressure balance can be achieved as soon as possible in the flowing process of the fluid.

Preferably, at the heat radiating end, the distance between the adjacent communication pipes increases from the lower portion to the upper portion of the heat radiating end. Experiments show that the arrangement can ensure that the pressure balance is achieved more optimally and more quickly in the fluid flowing process. This is also the best way of communicating by extensively studying the law of change of the pressure distribution.

Preferably, at the heat radiating end, a lower portion of the heat radiating end is directed upward, and the flow area of the communication pipe is decreased. The purpose is to ensure reduced communication area and reduce cost. The same principle as the distance from the front is increasing.

Preferably, the width of the flow area of the communication pipe decreases gradually in the upper direction at the lower portion of the heat radiating end at the heat radiating end. Experiments show that the arrangement can ensure that the pressure balance is achieved more optimally and more quickly in the fluid flowing process. This is also the best way of communicating by extensively studying the law of change of the pressure distribution.

Preferably, a plurality of temperature equalization plates are arranged on the inner wall of the heat insulation part along the direction from bottom to top, and the included angle of A2 is smaller along the direction from bottom to top. Because the mixing degree of the fluid is better and better along with the continuous movement of the fluid, the included angle needs to be set to be smaller and smaller so as to reduce the flow resistance, and the temperature equalizing effect achieves the basically same effect on the aspects of reducing the resistance and saving the material cost.

Preferably, the smaller and smaller the included angle of a2 increases in the direction from bottom to top and in the direction from bottom to top. The effect is obtained through a large number of numerical simulation and experimental research results, and the research finds that the rule accords with the rule of fluid motion, and the temperature equalizing effect achieves the basically same effect on the aspects of further reduction of resistance and saving of material cost.

Preferably, the inner wall of the heat insulation part is provided with a plurality of layers of temperature-equalizing plates along the direction from bottom to top, and the total radian of the arc connecting the temperature-equalizing plates and the inner wall on the same layer is smaller and smaller along the direction from bottom to top. Because the mixing degree of the fluid is better and better along with the continuous movement of the fluid, the flow space which needs to be arranged is larger and larger so as to reduce 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 total radian of the arcs connecting the temperature equalizing plates and the inner wall of the same layer is gradually increased along the direction from bottom to top. The effect is obtained through a large number of numerical simulation and experimental research results, and the research finds that the rule accords with the rule of fluid motion, and the temperature equalizing effect achieves the basically same effect on the aspects of further reduction of resistance and saving of material cost.

Preferably, a plurality of temperature equalization plates are arranged on the inner wall of the heat insulation part along the direction from bottom to top, and the included angle of A1 is increased along the direction from bottom to top. Because the mixing degree of the fluid is better and better along with the continuous movement of the fluid, the included angle needs to be set to be larger and larger so as to reduce the size, the flow resistance is reduced, and the temperature equalizing effect achieves the basically same effect on the aspects of reducing the resistance and saving the material cost.

Preferably, the included angle a1 increases in the direction from bottom to top and in the direction from bottom to top. The effect is obtained through a large number of numerical simulation and experimental research results, and the research finds that the rule accords with the rule of fluid motion, and the temperature equalizing effect achieves the basically same effect on the aspects of further reduction of resistance and saving of material cost.

Although the present invention has been described with reference to the preferred embodiments, it is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (5)

1. A gravity heat pipe comprises an evaporation part, a condensation part and a heat insulation part, wherein liquid absorbs heat and evaporates in the evaporation part, enters the condensation part through the heat insulation part to release heat, and then returns to the evaporation part through gravity; the heat insulation structure is characterized in that a temperature-equalizing plate extending from the inner wall of the heat insulation part to the center of the heat insulation part is arranged in the heat insulation part, the temperature-equalizing plate comprises a first straight line wall and a second straight line wall extending from the inner wall, wherein an acute angle formed by the first straight line wall and the inner wall is smaller than an acute angle formed by the second straight line wall and the inner wall, the first straight line wall and the second straight line wall extend towards the flowing direction of fluid, the intersection point of the first straight line wall and the second straight line wall is positioned at the upper part of the connection part of the first straight line wall and the inner wall and is positioned at the upper part of the connection part of the second straight line wall and the inner wall, and the shape of the temperature-equalizing plate is formed by the first straight line wall, the second straight line wall and the inner wall rotating along the axis of the heat insulation part; the first and second straight walls are provided with communication holes that penetrate the first and second straight walls in the fluid flow direction, and the communication holes extend in the direction from the bottom to the top toward the center of the heat insulating portion.

2. The gravity heat pipe of claim 1, wherein the insulating portion has a duct formed in an inner wall thereof.

3. The gravity heat pipe of claim 1, the condensing portion having a plurality of heat emitting ends.

4. The gravity heat pipe of claim 1, wherein the heat sinks of the at least two heat emitting ends are independent of each other.

5. The utility model provides a gravity heat pipe, gravity heat pipe includes evaporation portion, condensing part and adiabatic portion, liquid is the heat absorption evaporation in evaporation portion, gets into the condensing part through adiabatic portion and releases heat, then returns evaporation portion through gravity.

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