Columnar fin falling film evaporation heat exchange tube for server

Abstract

The invention discloses a columnar fin falling film evaporation heat exchange tube for a server, and relates to the technical field of falling film evaporation heat exchangers, the columnar fin falling film evaporation heat exchange tube comprises a heat exchanger shell, a plurality of groups of finned heat exchange tubes which are arranged in the heat exchanger shell at equal intervals and are used for transmission and heat conduction, and a spiral flow guide tube which is inserted into the finned heat exchange tubes and is used for rotationally dividing evaporated liquid, the outer wall of the spiral flow guide pipe is wound with spiral stripes used for flow guide at equal intervals, and the whole spiral flow guide pipe is made of a light-weight carbon fiber plastic composite material. The rotating blades are impacted by descending evaporated liquor, then the spiral flow guide pipe is driven to rotate, the evaporated liquor located on the inner wall of the finned heat exchange pipe is guided and shunted through the rotating spiral flow guide pipe and the spiral stripes wound around the outer wall of the spiral flow guide pipe, and the thickness of an evaporated liquor film on the inner wall of the finned heat exchange pipe is controlled within a certain range; and the evaporation rate of the evaporated liquor is stably controlled within a certain range.

Description

Technical Field

[0001] The present invention relates to the technical field of falling film evaporation heat exchangers, in particular to a columnar fin falling film evaporation heat exchange tube for a server. Background Art

[0002] Currently, with the rapid development of technologies such as artificial intelligence and cloud computing, servers, as the core carriers of computing power, have seen their chip power consumption continue to rise. High-density computing leads to a sharp increase in the heat generated by the equipment. If the heat cannot be discharged in time, the chip performance will be significantly attenuated, and even hardware failure will occur. Traditional air cooling is gradually facing a heat dissipation bottleneck due to the low heat capacity of air. Liquid cooling technology has become a necessary choice for high-power servers. The coolant (such as deionized water, ethylene glycol aqueous solution or fluorinated liquid) heated by the server radiator is in a heat-carrying state and has a poor cooling effect. Therefore, the coolant needs to be cooled. The existing cooling process of the coolant generally transfers heat through a heat exchanger. The cooled coolant is then pumped to the server radiator using a water pump and pipeline to form a circulating heat dissipation.

[0003] In the existing technology, the heat-carrying coolant (about 25℃-45℃) is input into a chamber of the falling film evaporator heat exchanger through a water pump and flows through the outer wall of the evenly arranged columnar fin heat exchange tube. The heat is transferred to the inner wall of the heat exchange tube through the expanded heat transfer surface of the fin. At the same time, the low-boiling point evaporating liquid (such as a fluorinated medium with a boiling point of 10℃) flows into the inner wall of the heat exchange tube. Through the surface tension of the evaporating liquid and the capillary microstructure of the inner wall (such as microgrooves or hydrophilic coating), a uniform falling film liquid film is formed on the inner wall of the heat exchange tube. After absorbing the heat conducted by the heat exchange tube, it quickly evaporates and changes phase, so that the coolant temperature of the server is significantly reduced to 15℃-30℃; the evaporated heat-carrying gaseous and liquid working fluids are transported to the condensing equipment through a pumping pipeline. The evaporating liquid after cooling and liquefaction is pumped back into the heat exchanger for circulation and film formation, while the cooled server coolant returns to the radiator for circulation and heat dissipation.

[0004] However, the existing columnar falling film evaporation heat exchanger is still affected by some factors when in use. First, if the water volume of the evaporating liquid is too large or the water flow rate is too fast, the kinetic energy of the evaporating liquid is high, which makes it difficult for the liquid film to adhere evenly to the inner wall under the action of gravity and inertia. The liquid film in some areas is too thick, while other areas may break. The thermal resistance of the thick liquid film area increases, and the evaporation rate is significantly reduced, which ultimately affects the overall heat exchange uniformity and system energy efficiency.

[0005] Because the main purpose of the present invention is to solve the problem that the liquid film in some areas is too thick, while the liquid film may be broken in other areas, and the thermal resistance of the thick liquid film area increases, which significantly reduces the evaporation rate;

[0006] In response to the above problems, it is urgent to carry out innovative design based on the original columnar falling film evaporation heat exchange equipment. Summary of the Invention

[0007] The technical solution of the present invention addresses the technical problem that the existing technical solutions are too simple, and provides a solution that is significantly different from the existing technology. Specifically, the purpose of the present invention is to provide a falling film evaporation heat exchange tube to solve the problem raised in the above background technology that the liquid film in some areas is too thick, the liquid film may break in other areas, the thermal resistance of the thick liquid film area increases, and the evaporation rate may be significantly reduced.

[0008] To achieve the above objectives, the present invention provides the following technical solutions: a columnar fin falling film evaporation heat exchange tube for a server, comprising a heat exchanger shell, a plurality of groups of finned heat exchange tubes arranged at equal intervals inside the heat exchanger shell for heat transmission and conduction, and a spiral guide tube inserted into the finned heat exchange tubes for rotating and diverting the evaporating liquid;

[0009] The outer wall of the spiral flow guide tube is equidistantly wound with spiral strips for guiding flow, and the spiral flow guide tube is made of a lightweight carbon fiber plastic composite material. There is a certain gap between the spiral strips and the inner wall of the finned heat exchange tube, and they are in a non-contact state.

[0010] The top end of the inner wall of the heat exchanger shell is provided with a driving mechanism which utilizes the sinking evaporative liquid to drive the spiral guide tube to rotate and realize rotational diversion.

[0011] Preferably, a first tube sheet for limiting the top ports of the finned heat exchange tubes is welded to the top of the inner wall of the heat exchanger shell and below the water reservoir, and a second tube sheet for limiting the bottom ports of the finned heat exchange tubes is welded to the bottom of the inner wall of the heat exchanger shell.

[0012] Preferably, the first tube sheet and the second tube sheet separate three chambers inside the heat exchanger shell into an upper chamber, a middle chamber and a lower chamber, and each group of finned heat exchange tubes are arranged equidistantly inside the middle chamber, and the outer wall of the finned heat exchange tube is fixed with multiple groups of fins at equal angles around the center of the circle for increasing the heat transfer surface;

[0013] Preferably, the second tube sheet is a double-layer hollow structure, and the ports at both ends of each group of finned heat exchange tubes are respectively inserted into the interior of the first tube sheet and the second tube sheet, and each group of the first tube sheet and the second tube sheet are provided with matching-sized insertion holes at the contact positions with the ports of the finned heat exchange tubes on the surfaces adjacent to each other.

[0014] Preferably, a water reservoir is welded at the top of the inner wall of the heat exchanger shell, the upper surface of the water reservoir is a smooth arc surface, and the upper surface of the water reservoir is provided with a waist-shaped hole for concentrating the evaporating liquid corresponding to each group of finned heat exchange tubes;

[0015] Preferably, the driving mechanism includes a first connecting tube coaxially fixed to the top of the spiral guide tube, a second connecting tube coaxially fixed to the outer wall of the first connecting tube away from the spiral guide tube, and the second connecting tube is inserted into the waist-shaped hole;

[0016] Preferably, the outer wall of the second connecting pipe is fixed with multiple groups of rotating blades, the top position of the second connecting pipe is concentrically fixed with a spiral guide pipe, and the second connecting pipe passes through the center of the bottom end of the inner wall of the waist-shaped hole;

[0017] Preferably, a plurality of vent holes are formed on the outer wall of the top end of the second connecting pipe at equal angles around the center of the circle, a waterproof cover is fixed to the outer wall of the top end of the second connecting pipe, and a positioning insert is fixed to the bottom port of the spiral flow guide pipe, and the positioning insert extends downward and passes through the lower surface of the second tube plate;

[0018] Preferably, positioning holes are provided through the contact position between the waist-shaped hole and the second connecting pipe and the contact position between the lower surface of the second tube plate and the positioning insert pipe, and the edge of each group of positioning holes is provided with multiple groups of drainage holes in an array with equal angles around the center of the positioning hole;

[0019] Preferably, the upper surface of the waist-shaped hole and the lower surface of the second tube plate are both provided with a plurality of groups of arc-shaped drain holes in an array with equal angles around the center of the circle.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] First, the driving mechanism uses the descending evaporating liquid to impact the rotor blades, which in turn drives the spiral guide tube to rotate. The rotating spiral guide tube and the spiral strips wrapped around its outer wall then guide and divert the evaporating liquid on the inner wall of the finned heat exchange tube, controlling the thickness of the evaporating liquid film on the inner wall of the finned heat exchange tube within a certain range, ensuring that the evaporation rate of the evaporating liquid is stably controlled within a certain range.

[0022] The spiral stripes wrapped around the outer wall of the spiral guide tube in the rotating state break up the evaporating liquid. By breaking up the evaporating liquid into tiny water droplets, the evaporation rate of the evaporating liquid can be increased to a certain extent, indirectly improving the heat exchange efficiency and the cooling rate of the coolant.

[0023] The downward-moving evaporating liquid continuously impacts the spiral stripes wound around the outer wall of the spiral guide tube in a narrow gap, which can accelerate the rotation speed of the spiral guide tube, which is mainly made of carbon fiber plastic composite material, to a certain extent, and enhance the operating efficiency of the drive mechanism.

[0024] Finally, the gaseous evaporative liquid rises along the inner wall of the spiral guide tube and is sprayed into the water storage chamber through the vent hole, that is, the upper chamber of the water reservoir. The gaseous evaporative liquid carrying heat can preheat the low-temperature evaporative liquid that has just entered the heat exchanger shell and the evaporative liquid between the finned heat exchange tube and the spiral guide tube, which can shorten the evaporation time of the evaporative liquid to a certain extent and indirectly improve the heat exchange efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a main schematic diagram of the present invention.

[0026] Figure 2 It is a schematic half-section diagram of the entire device of the present invention.

[0027] Figure 3 It is a schematic plan view of the inner component of the present invention.

[0028] Figure 4 It is a schematic top view of the inner component of the present invention.

[0029] Figure 5 It is a schematic diagram of the partial connection of the finned heat exchange tube and the water reservoir of the present invention.

[0030] Figure 6 It is a schematic diagram of a half-section of the finned heat exchange tube and the connection of the spiral guide tube of the present invention.

[0031] Figure 7 It is a partially enlarged schematic diagram of the spiral flow guide tube of the present invention.

[0032] Figure 8 Schematic diagram of the connection between the spiral guide tube and the rotary vane of the present invention.

[0033] Figure 9 It is a schematic diagram of a half-section top view of the water reservoir of the present invention.

[0034] Figure 10 It is a schematic diagram of the half-section structure of the water reservoir of the present invention when viewed from above.

[0035] In the figure: 1, heat exchanger shell; 11, first tube sheet; 12, second tube sheet; 13, finned heat exchange tube; 2, water reservoir; 21, kidney-shaped hole;

[0036] 3. Positioning hole; 31. Drain hole;

[0037] 4. Spiral guide tube; 41. First connecting tube; 42. Second connecting tube; 43. Rotating blade; 44. Waterproof cover; 45. Positioning cannula;

[0038] 5. Arc-shaped drain hole. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] See also Figures 1 to 10 The present invention provides a technical solution: a columnar fin falling film evaporation heat exchange tube for a server, comprising a heat exchanger shell 1, a plurality of groups of finned heat exchange tubes 13 arranged at equal intervals inside the heat exchanger shell 1 for transmitting heat, and a spiral guide tube 4 inserted into the finned heat exchange tubes 13 for rotating and diverting the evaporating liquid;

[0041] The outer wall of the spiral flow guide tube 4 is equidistantly wound with spiral strips for guiding the flow. The spiral flow guide tube 4 is made of a lightweight carbon fiber plastic composite material. There is a certain gap between the spiral strips and the inner wall of the finned heat exchange tube 13, and they are in a non-contact state.

[0042] A driving mechanism is provided at the top of the inner wall of the heat exchanger shell 1 for utilizing the sinking evaporative liquid to drive the spiral flow guide tube 4 to rotate and realize rotary diversion.

[0043] In a specific implementation, the descending evaporative liquid is used to impact the rotary blades 43, thereby driving the spiral guide tube 4 to rotate. The evaporative liquid on the inner wall of the winged heat exchange tube 13 is then guided and diverted by the rotating spiral guide tube 4 and the spiral strips wound around its outer wall, so that the thickness of the evaporative liquid film on the inner wall of the winged heat exchange tube 13 is controlled within a certain range, ensuring that the evaporation rate of the evaporative liquid is stably controlled within a certain range. The spiral strips wound around the outer wall of the spiral guide tube 4 in the rotating state break up the evaporative liquid. By breaking up the evaporative liquid into tiny water droplets, the evaporation rate of the evaporative liquid can be increased to a certain extent, thereby indirectly improving the heat exchange efficiency and the cooling rate of the coolant.

[0044] As a further embodiment of the present invention, a first tube sheet 11 for limiting the installation of the top port of the finned heat exchange tube 13 is welded at the top end of the inner wall of the heat exchanger shell 1 and below the water reservoir 2, and a second tube sheet 12 for limiting the installation of the bottom port of the finned heat exchange tube 13 is welded at the bottom end of the inner wall of the heat exchanger shell 1.

[0045] In a specific implementation, the first tube sheet 11 and the second tube sheet 12 inside the heat exchanger shell 1 as well as the water reservoir 2 and the heat exchanger shell 1 are all welded to ensure the airtightness of the equipment.

[0046] As a further implementation scheme of the present invention, the first tube sheet 11 and the second tube sheet 12 separate three chambers, namely the upper chamber, the middle chamber and the lower chamber, inside the heat exchanger shell 1, and each group of finned heat exchange tubes 13 are arranged equidistantly inside the middle chamber, and the outer wall of the finned heat exchange tube 13 is fixed with multiple groups of fins at equal angles around the center of the circle for increasing the heat conduction surface.

[0047] In a specific implementation, the upper chamber is divided into a water storage chamber and a diversion chamber by the water reservoir 2. The evaporating liquid preheated by the hot gaseous evaporating liquid moves downward along the waist-shaped hole 21 and drives the rotary blade 43 and the spiral guide tube 4 to rotate. Then the evaporating liquid flows down to the inside of the diversion chamber through the water downhole 31 and enters the inside of the finned heat exchange tube 13 through multiple groups of trumpet-shaped smooth holes opened on the upper surface of the first tube plate 11.

[0048] As a further embodiment of the present invention, the second tube sheet 12 is a double-layer hollow structure, and the ports at both ends of each group of finned heat exchange tubes 13 are respectively inserted into the interior of the first tube sheet 11 and the second tube sheet 12, and each group of first tube sheets 11 and second tube sheets 12 are provided with sockets of matching sizes at the contact positions of the ports of the finned heat exchange tubes 13 on the sides close to each other.

[0049] In a specific implementation, the jacks on the outer wall of the second tube sheet 12 cooperate with the first tube sheet 11 to fix and limit each group of finned heat exchange tubes 13. At the same time, the joints are coated with high-temperature resistant sealant or padded with sealing rings.

[0050] As a further embodiment of the present invention, a water reservoir 2 is welded at the top of the inner wall of the heat exchanger shell 1. The upper surface of the water reservoir 2 is a smooth arc surface. The upper surface of the water reservoir 2 is provided with waist-shaped holes 21 for concentrating the evaporating liquid corresponding to each group of finned heat exchange tubes 13.

[0051] In a specific implementation, the upper surface of the water reservoir 2 is a smooth arc surface, which can relatively evenly divert the low-temperature evaporative liquid flowing down from the upper center position to various positions on the upper surface of the water reservoir 2, ensuring that the water inlet rate of each waist-shaped hole 21 is always maintained in a stable range, and the remaining evaporative liquid directly enters the diversion chamber through the arc-shaped water hole 5 opened around the circular ring on the edge.

[0052] As a further embodiment of the present invention, the driving mechanism includes a first connecting tube 41 coaxially fixed at the top position of the spiral guide tube 4, and a second connecting tube 42 coaxially fixed to the outer wall of the first connecting tube 41 away from the spiral guide tube 4, and the second connecting tube 42 is inserted into the inside of the waist-shaped hole 21.

[0053] In a specific implementation, the second connecting pipe 42 passes through the first connecting pipe 41 and the spiral guide pipe 4, and the second connecting pipe 42, the first connecting pipe 41 and the interior of the spiral guide pipe 4 form an exhaust channel. The gaseous evaporative liquid will enter the water storage chamber along the exhaust channel. While the heat-carrying gas passes through the inner wall of the spiral guide pipe 4, it will preheat the evaporative liquid located at the gap between the inner wall of the finned heat exchange tube 13 and the outer wall of the spiral guide pipe 4. The gaseous evaporative liquid continues to enter the water storage chamber upward to preheat the low-temperature evaporative liquid again. The two preheatings can shorten the time for the evaporative liquid to evaporate due to heat, and indirectly improve the heat exchange efficiency of the equipment.

[0054] As a further embodiment of the present invention, multiple groups of rotating blades 43 are fixed to the outer wall of the second connecting pipe 42, a spiral guide pipe 4 is concentrically fixed to the top position of the second connecting pipe 42, and the second connecting pipe 42 passes through the center of the bottom end of the inner wall of the waist-shaped hole 21.

[0055] In a specific implementation, the evaporative liquid flows downward and impacts the plurality of rotary blades 43 , thereby driving the spiral guide tube 4 to rotate, thereby achieving stable flow guidance of the evaporative liquid.

[0056] As a further embodiment of the present invention, a plurality of ventilation holes are provided on the top outer wall of the second connecting pipe 42 at equal angles around the center of the circle. A waterproof cover 44 is fixed to the top outer wall of the second connecting pipe 42. A positioning insert 45 is fixed to the bottom port of the spiral guide pipe 4. The positioning insert 45 extends downward and passes through the lower surface of the second tube plate 12.

[0057] In a specific implementation, multiple sets of vents can provide a channel for the gaseous heat-carrying evaporative liquid to enter the water storage chamber. At the same time, the waterproof cover 44 can prevent a large amount of downstream evaporative liquid from entering the spiral guide tube 4, thereby avoiding a large amount of evaporative liquid from clogging the exhaust channel.

[0058] As a further embodiment of the present invention, positioning holes 3 are provided through the contact position between the waist-shaped hole 21 and the second connecting pipe 42 and the contact position between the lower surface of the second tube plate 12 and the positioning insert 45. The edge of each group of positioning holes 3 is provided with multiple groups of drainage holes 31 in an array of equal angles around the center of the positioning hole 3.

[0059] In a specific implementation, the positioning holes 3 can provide support for the bottom of the spiral guide tube 4 to ensure stable operation of the spiral guide tube 4 during rotation, and the multiple groups of water holes 31 can ensure that the evaporated liquid flows smoothly into the lower chamber.

[0060] As a further embodiment of the present invention, the upper surface of the waist-shaped hole 21 and the lower surface of the second tube plate 12 are both penetrated by a plurality of groups of arc-shaped drain holes 5 in an array with equal angles around the center of the circle.

[0061] In a specific implementation, the multiple groups of arc-shaped drain holes 5 can expand the flow rate of the evaporative liquid, guide the evaporative liquid at the edge position, and prevent liquid accumulation.

[0062] Working Principle: First, the heat-carrying coolant (temperature of approximately 15°C to 60°C) pumped out by the server radiator flows through the pipe into the middle cavity of the heat exchanger shell 1 (a water inlet valve is installed on the top of one side of the middle cavity, a water outlet valve is installed on the bottom of the other side of the middle cavity, and multiple groups of guide baffles that form a one-way channel are installed diagonally inside the middle cavity) and contacts each group of finned heat exchange tubes 13 for heat exchange;

[0063] As the heat-carrying coolant flows into the middle cavity, evaporative liquid (liquid with a boiling point of 15°C to 60°C) is pumped in from the top water inlet of the heat exchanger shell 1. The evaporative liquid first falls naturally by gravity and falls onto the dome-shaped upper surface of the water reservoir 2. Because the evaporative liquid has a fast flow rate and a large amount of water, a portion of the evaporative liquid will directly fall along the arc-shaped drain hole 5 onto the upper surface of the first tube sheet 11.

[0064] Most of the evaporated liquid temporarily accumulates on the upper surface of the water reservoir 2 in the drive mechanism, while the remaining evaporated liquid is directed into the kidney-shaped hole 21 (a cavity that is narrow in the middle and relatively wide at the upper and lower ends). The evaporated liquid uses gravity to squeeze the narrow kidney-shaped hole 21, increasing the flow rate of the water. The downward force of the evaporated liquid cooperates with multiple sets of rotating blades 43 in the same direction to drive the spiral guide tube 4 and the upper and lower components to rotate. The evaporated liquid in the kidney-shaped hole 21 eventually flows continuously through the water outlet holes 31 to the upper surface of the first tube plate 11.

[0065] It should be noted that the first tube sheet 11 and the second tube sheet 12 divide the inner cavity of the heat exchanger shell 1 into three sealed chambers: an upper chamber, a middle chamber, and a lower chamber. The two ends of each group of finned heat exchange tubes 13 are respectively inserted and fixed to the outer wall of the first tube sheet 11 and the second tube sheet 12 on one side close to each other, and the finned heat exchange tubes 13 are used to connect the upper chamber and the lower chamber. The upper chamber is further divided into two chambers: a water storage chamber and a diversion chamber by the water reservoir 2. The evaporated liquid passes through the water storage chamber and the diversion chamber in sequence from top to bottom.

[0066] Then, the evaporating liquid (the evaporating liquid has already passed through multiple obstacles and therefore has a relatively slow flow rate) slowly flows through the trumpet-shaped holes on the first tube sheet 11 to the inner wall of the finned heat exchange tube 13 (note here that the upper end of the finned heat exchange tube 13 is inserted into the corresponding hole on the first tube sheet 11. The holes on the upper surface of the first tube sheet 11 are trumpet-shaped, and the inner wall of the trumpet-shaped hole is relatively smooth. The inner diameter of the finned heat exchange tube 13 is the same as the inner diameter of the bottom of each corresponding trumpet-shaped hole).

[0067] Then, the spiral guide tube 4 in the rotating state uses the spiral stripes wound around its outer wall to evenly distribute the evaporating liquid on the inner wall of the finned heat exchange tube 13. The fixed distance between the finned heat exchange tube 13 and the outer wall of the spiral guide tube 4 limits the thickness of the falling film (the water film formed by the evaporating liquid inside the finned heat exchange tube 13), preventing the evaporating liquid from having uneven thickness and stabilizing the evaporation rate of the equipment. At the same time, the spiral stripes wound around the outer wall of the spiral guide tube 4 can also break up some of the evaporating liquid into tiny water droplets during the rotation process, further improving the evaporation rate.

[0068] The evaporating liquid is directly evaporated at the interval between the finned heat exchange tube 13 and the spiral guide tube 4 (the heat of the coolant is conducted by the finned heat exchange tube 13 and evaporates the evaporating liquid film flowing through it). The water vapor formed after evaporation will flow under the descending water film (that is, the other part of the liquid evaporating liquid that has not evaporated) into the lower cavity, or be discharged upward along the gap between the spiral guide tube 4 and the finned heat exchange tube 13 into the upper cavity. During the evaporation process, the heat carried by the coolant inside the middle cavity is continuously discharged, thereby realizing rapid cooling of the coolant. When the coolant temperature inside the middle cavity drops to 15°C or below, the water outlet valve at the bottom of one side of the middle cavity is opened to release the cooled coolant, and then the cooled coolant is pumped back to the server radiator. If a single cooling is not enough to achieve the expected cooling effect, the cooled coolant can be returned to the heat exchanger shell 1 after a round of cooling for multiple rounds of cooling until the coolant drops to the expected temperature.

[0069] The evaporating liquid (including liquid and gas) flows down the inner wall of the finned heat exchange tube 13 to the cavity in the middle of the second tube sheet 12, and finally enters the lower cavity through the drain hole 31. At this time, the evaporating liquid is in a heat-carrying state after a round of evaporation (but has not reached the boiling point). The liquid evaporating liquid flows along the drain port at the bottom of the heat exchanger shell 1 to the external condensing device. After a round of cooling, it is pumped to the water inlet at the top of the heat exchanger shell 1 for a new round of heat exchange.

[0070] The heat-carrying gaseous evaporative liquid moves upward through the hollow inner cavity of the spiral guide tube 4 (the hot steam will move upward) and passes through the inner walls of the first connecting tube 41 and the second connecting tube 42. The heat-carrying gaseous evaporative liquid continues to rise and finally enters the water storage chamber, that is, the upper chamber of the water reservoir 2, along the vent hole. In the process of passing through the spiral guide tube 4, the heat-carrying gaseous evaporative liquid can perform a round of preheating on the water film between the winged heat exchange tube 13 and the spiral guide tube 4. The heat-carrying gaseous evaporative liquid can also perform another round of preheating on the evaporative liquid that has just entered the water storage chamber. To a certain extent, it can shorten the time for the evaporative liquid to evaporate due to heat, and indirectly improve the heat exchange efficiency of the equipment. When there is too much gaseous steam inside the heat exchanger shell 1, the pressure can be reduced through multiple vents.

[0071] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A columnar fin falling film evaporation heat exchange tube for a server, comprising a heat exchanger shell (1), characterized in that: It also includes a plurality of groups of finned heat exchange tubes (13) arranged at equal intervals inside the heat exchanger shell (1) for transmitting heat, and a spiral flow guide tube (4) inserted into the finned heat exchange tubes (13) for rotating and diverting the evaporating liquid; The outer wall of the spiral flow guide tube (4) is equidistantly wound with spiral strips for guiding flow, and the spiral flow guide tube (4) is made entirely of a lightweight carbon fiber plastic composite material. There is a certain gap between the spiral strips and the inner wall of the finned heat exchange tube (13), and they are in a non-contact state. The top end of the inner wall of the heat exchanger shell (1) is provided with a driving mechanism for utilizing the sinking evaporative liquid to drive the spiral flow guide tube (4) to rotate and realize rotary diversion.

2. The columnar fin falling film evaporation heat exchange tube for a server according to claim 1, characterized in that: A first tube sheet (11) for positionally limiting the top port of the finned heat exchange tube (13) is welded to the top of the inner wall of the heat exchanger shell (1) and located below the water reservoir (2), and a second tube sheet (12) for positionally limiting the bottom port of the finned heat exchange tube (13) is welded to the bottom of the inner wall of the heat exchanger shell (1).

3. The columnar fin falling film evaporation heat exchange tube for a server according to claim 2, characterized in that: The first tube sheet (11) and the second tube sheet (12) separate three chambers, namely an upper chamber, a middle chamber and a lower chamber, inside the heat exchanger shell (1), and each group of finned heat exchange tubes (13) are arranged at equal intervals inside the middle chamber. The outer wall of the finned heat exchange tube (13) is fixed with multiple groups of fins at equal angles around the center of the circle for increasing the heat conduction surface.

4. The columnar fin falling film evaporation heat exchange tube for a server according to claim 3, characterized in that: The second tube sheet (12) is a double-layer hollow structure, and the ports at both ends of each group of finned heat exchange tubes (13) are respectively inserted into the interior of the first tube sheet (11) and the second tube sheet (12), and each group of the first tube sheet (11) and the second tube sheet (12) are provided with a socket of matching size at the contact position of the port of the finned heat exchange tube (13) on the side close to each other.

5. The columnar fin falling film evaporation heat exchange tube for a server according to claim 4, characterized in that: A water reservoir (2) is welded at the top end of the inner wall of the heat exchanger shell (1); the upper surface of the water reservoir (2) is a smooth arc surface; and waist-shaped holes (21) for concentrating evaporating liquid are provided on the upper surface of the water reservoir (2) corresponding to each group of finned heat exchange tubes (13).

6. The columnar fin falling film evaporation heat exchange tube for a server according to claim 1, characterized in that: The driving mechanism comprises a first connecting tube (41) coaxially fixed at the top end of the spiral flow guide tube (4); a second connecting tube (42) coaxially fixed to the outer wall of the first connecting tube (41) away from the spiral flow guide tube (4); and the second connecting tube (42) is inserted into the interior of the waist-shaped hole (21).

7. The columnar fin falling film evaporation heat exchange tube for a server according to claim 6, characterized in that: The outer wall of the second connecting tube (42) is fixed with multiple groups of rotating blades (43), the top of the second connecting tube (42) is concentrically fixed with a spiral flow guide tube (4), and the second connecting tube (42) passes through the center of the bottom end of the inner wall of the waist-shaped hole (21).

8. The columnar fin falling film evaporation heat exchange tube for a server according to claim 7, characterized in that: The outer wall of the top end of the second connecting pipe (42) is provided with a plurality of vent holes at equal angles around the center of the circle. A waterproof cover (44) is fixed to the outer wall of the top end of the second connecting pipe (42). A positioning insert (45) is fixed to the bottom port of the spiral flow guide pipe (4). The positioning insert (45) extends downward and passes through the lower surface of the second tube plate (12).

9. The columnar fin falling film evaporation heat exchange tube for a server according to claim 8, characterized in that: Positioning holes (3) are provided through the contact position between the waist-shaped hole (21) and the second connecting pipe (42) and the contact position between the lower surface of the second tube plate (12) and the positioning insert (45), and the edge of each group of the positioning holes (3) is provided with a plurality of groups of water discharge holes (31) in an array with equal angles around the center of the positioning hole (3).

10. The columnar fin falling film evaporation heat exchange tube for a server according to claim 9, characterized in that: The upper surface of the waist-shaped hole (21) and the lower surface of the second tube plate (12) are both provided with a plurality of groups of arc-shaped water discharge holes (5) in an array with equal angles around the center of the circle.

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