A server room heat dissipation refrigeration device

Abstract

The application belongs to the technical field of electronic equipment heat dissipation, and discloses a heat dissipation refrigeration device for a server room, which comprises a cooling source for providing a refrigeration cooling source; a wind wall connected with the cooling source through a pipeline; a heat exchanger arranged in the wind wall; a cold water coil connected with the heat exchanger; a compressor; a connecting pipe connected with the compressor; and an expansion valve connected with the heat exchanger through the connecting pipe; and a fan arranged on the wind wall to form an air cooling heat dissipation channel; and a cold energy distribution assembly connected with the cooling source through a pipeline, which is used for distributing cold energy to adapt to different liquid cooling ratios of business demands; a wind-liquid compatible design avoids dependence on a single cooling technology; the proportion of air cooling and liquid cooling can be adjusted in real time through an intelligent control system; IT load changes (such as diurnal flow fluctuation and seasonal business peak) can be matched; and PUE (power utilization efficiency) can be reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electronic equipment heat dissipation, and particularly relates to a heat dissipation and refrigeration device for a server room. BACKGROUND

[0002] In the planning and construction of new servers, the uncertainty of business demand and the dual challenge of technical iteration are particularly critical for the flexible design and forward layout of infrastructure. As a key solution, the wind-liquid compatible design (i.e., supporting both air cooling and liquid cooling mixed heat dissipation architecture) can effectively balance short-term cost and long-term flexibility. However, most existing data center refrigeration systems adopt a single heat dissipation architecture, which cannot flexibly adapt to future business changes and technical evolution, and the following technical problems exist in particular.

[0003] Traditional data center refrigeration systems are usually designed based on a single air cooling or liquid cooling architecture, which cannot flexibly adapt to the dynamic changes of business load. If pure air cooling architecture is adopted in initial deployment, it can meet the low-density business demand (such as traditional IT load), but cannot provide rapid expansion capability for future high-density computing (such as AI clusters, GPU servers). When liquid cooling servers are introduced due to sudden changes in business demand, the existing air cooling system cannot be directly compatible, resulting in the need to rebuild the architecture, causing waste of investment and business interruption. SUMMARY

[0004] The present application is directed to the problem in the prior art that traditional data center refrigeration systems are usually designed based on a single air cooling or liquid cooling architecture, which cannot flexibly adapt to the dynamic changes of business load. If pure air cooling architecture is adopted in initial deployment, it can meet the low-density business demand (such as traditional IT load), but cannot provide rapid expansion capability for future high-density computing (such as AI clusters, GPU servers). When liquid cooling servers are introduced due to sudden changes in business demand, the existing air cooling system cannot be directly compatible, resulting in the need to rebuild the architecture, causing waste of investment and business interruption. The following technical solution is proposed:

[0005] A heat dissipation and refrigeration device for a server room, comprising: a cooling source for providing a refrigeration source;

[0006] An air wall connected to the cooling source through a pipeline, the air wall is provided with a heat exchanger, a cold water coil connected to the heat exchanger, a compressor, a connecting pipe connected to the compressor, and an expansion valve, the expansion valve is connected to the heat exchanger through the connecting pipe, and a fan is arranged on the air wall to form an air cooling heat dissipation channel;

[0007] A cold quantity distribution assembly connected to the cooling source through a pipeline, for distributing cold quantity to adapt to different liquid cooling ratios of business demand;

[0008] A server unit connected to the cold quantity distribution assembly to realize heat dissipation by receiving distributed cold quantity;

[0009] The air flow guiding structure comprises: an elastic telescopic structure, an air outlet plate, and a thermal expansion and contraction deflection structure.

[0010] The elastic telescopic structure is fixedly installed above the fan, and a telescopic end thereof is connected with the air outlet plate, for adjusting the distance between the air outlet plate and the cold water coil.

[0011] The air outlet plate is fixed to the telescopic end of the elastic telescopic structure, for guiding and discharging the air flow.

[0012] The thermal expansion and contraction deflection structure is embedded in the air outlet plate, and can generate deformation according to the difference in absorbed heat, so as to change the flow direction of the air flow and the air outlet position.

[0013] As a preferred solution of the above technical scheme, the substance in the cold water coil is water, and the substance in the connecting pipe is fluorine.

[0014] As a preferred solution of the above technical scheme, the elastic telescopic structure comprises a fixed strip, the fixed strip is fixedly installed at the top end of the outer surface of the fan, one end of the fixed strip is symmetrically embedded with spring telescopic rods, a connecting sleeve is clamped and installed between the movable ends of the two spring telescopic rods, and one end of the connecting sleeve is fixedly connected with one end of the air outlet plate close to the fan.

[0015] As a preferred solution of the above technical scheme, a cavity is formed in the air outlet plate, the cavity is connected with the air outlet of the fan, a receiving cavity is formed in one end of the air outlet plate close to the fan, and circular holes are equidistantly formed in the outer surface of the other end of the air outlet plate away from the fan.

[0016] As a preferred solution of the above technical scheme, the thermal expansion and contraction deflection structure comprises a circular ring, the circular ring is fixedly installed in the circular hole of the air outlet plate, fixed sleeves are symmetrically embedded in one end of the air outlet plate close to the fan, movable rods are slidingly connected in the fixed sleeves, telescopic pieces are fixedly connected between the outer sides of the movable rods and the inner walls of the fixed sleeves, connecting strips are movably connected to one end of the movable rods, and the same blocking block is fixedly connected between the connecting strips.

[0017] As a preferred solution of the above technical scheme, the movable rods are T-shaped, and the telescopic pieces are sleeved on the outer sides of the smallest diameters of the telescopic pieces and are fixedly connected with one end faces of the largest diameters of the telescopic pieces.

[0018] As a preferred solution of the above technical scheme, the number ratio of the connecting strips to the blocking blocks is two to one, a guide groove is formed in one of the connecting strips on the blocking block, and a cylinder is rotatably connected in the other connecting strip and the guide groove.

[0019] As the preferred technical solution of the above, the materials of the two telescopic parts are copper and aluminum respectively, and the shape of the telescopic part is a circular ring.

[0020] As the preferred technical solution of the above, the water outlet of the cooling source is connected with a cooling pump, and the water outlet of the cooling pump is connected with the heat exchanger through a pipeline.

[0021] The beneficial effects of the present application are:

[0022] (1) The wind-liquid compatible design avoids the dependence on single cooling technology, and the proportion of air cooling and liquid cooling can be adjusted in real time through an intelligent control system to match the IT load changes (such as day-night flow fluctuation and seasonal business peak), thereby reducing PUE (power utilization efficiency);

[0023] (2) The initial deployment can meet the low-density business demand (such as traditional IT load) based on the wind cooling architecture, and the reserved liquid cooling interface and pipeline provide rapid expansion capability for future high-density computing (such as AI cluster and GPU server), thereby avoiding the reconstruction of the architecture due to business mutation.

[0024] (3) Differentiated heat dissipation requirements of different business modules (such as storage, computing, and network) are supported, for example, CPU uses air cooling, GPU cluster uses liquid cooling, and dynamic adjustment of business is flexibly matched.

[0025] (4) The hot air flow is guided at different positions outside the cold water coil to avoid the problem of local heat exchange saturation of the cold water coil and waste of the remaining parts, so that the heat exchange area of the entire cold water coil is uniformly and efficiently utilized, and the heat exchange efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A structural schematic diagram of a heat dissipation and refrigeration device of a server room in embodiment 1 is shown;

[0027] Figure 2 A structural schematic diagram of a heat dissipation and refrigeration device of a server room in embodiment 1 is shown;

[0028] Figure 3 A structural schematic diagram of an air outlet plate in embodiment 1 is shown;

[0029] Figure 4 A structural schematic diagram of a movable rod in embodiment 1 is shown;

[0030] Figure 5 A sectional view of a fixed sleeve in embodiment 1 is shown;

[0031] Figure 6 A system block diagram of a heat dissipation and refrigeration device of a server room in embodiment 1 is shown.

[0032] In the figure: 1, cooling source; 2, wind wall; 21, heat exchanger; 22, cold water coil; 23, compressor; 24, connecting pipe; 25, expansion valve; 26, fan; 3, cold distribution assembly; 4, server unit; 51, fixed bar; 52, spring telescopic rod; 53, connecting sleeve; 54, air outlet plate; 55, circular ring; 56, fixed sleeve; 57, movable rod; 58, telescopic piece; 59, connecting bar; 510, blocking block. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be described clearly and completely below in conjunction with the embodiments.

[0034] Embodiment 1

[0035] The present application provides a kind of server room heat dissipation refrigeration device, as shown in Figures 1 to 6 Cooling source 1, wind wall 2, cold distribution assembly 3, server unit 4 and air volume drainage structure;Cooling source 1 (cooling tower) is used to provide refrigeration cold source;Wind wall 2 is connected between cooling source 1 by pipeline, and heat exchanger 21 is arranged in wind wall 2, cold water coil 22 connected with heat exchanger 21, compressor 23, connecting pipe 24 connected with compressor 23 and expansion valve 25, expansion valve 25 is connected with heat exchanger 21 by connecting pipe 24, and fan 26 is configured on wind wall 2 to form air cooling heat dissipation channel;Cold distribution assembly 3 is connected between cooling source 1 by pipeline, for distributing cold to adapt to different liquid cooling proportion of business demand;The substance in the inside of cold water coil 22 is water, the substance in the inside of connecting pipe 24 is fluorine, server unit 4 is connected with cold distribution assembly 3 (cold distribution assembly 3 belongs to the cold distribution unit of liquid cooling system, which is combined by shunt pipe, sensor and water pump etc., belongs to prior art), realizes heat dissipation by receiving distributed cold;Air volume drainage structure includes: elastic telescopic structure, air outlet plate 54, thermal expansion and cold contraction deflection structure;Elastic telescopic structure is fixedly installed above fan 26, and the telescopic end is connected with air outlet plate 54, for adjusting the distance between air outlet plate 54 and cold water coil 22;Air outlet plate 54 is fixed on the telescopic end of elastic telescopic structure, for guiding and discharging airflow;Thermal expansion and cold contraction deflection structure is embedded in air outlet plate 54, which can produce deformation according to the difference of absorbed heat to change the flow direction of airflow and air outlet position, the water outlet end of cooling source 1 is connected with cooling pump, and the water outlet end of cooling pump is connected with heat exchanger 21 by pipeline.

[0036] Traditional data center refrigeration systems are usually based on single air cooling or liquid cooling architecture design, which cannot flexibly adapt to the dynamic changes of business load. If pure air cooling architecture is used in initial deployment, it can meet the low-density business demand (such as traditional IT load), but cannot provide rapid expansion capacity for future high-density computing (such as AI cluster, GPU server). When the business demand changes and liquid cooling server needs to be introduced, the existing air cooling system cannot be directly compatible, resulting in the problem of investment waste and business interruption caused by the need to rebuild the architecture;

[0037] In the present application, the liquid cooling interface and pipeline reserved based on the wind wall 2 to meet the low-density business demand (such as traditional IT (information technology) load) in the initial deployment provide rapid expansion capacity for future high-density computing (such as GPU server), avoiding the architecture rebuilding caused by business mutation;

[0038] Mixed load compatibility: supporting the differentiated heat dissipation needs of different business modules (such as storage, computing, network) (for example, CPU (central processing unit) uses air cooling, GPU (graphics processing unit, display core) cluster uses liquid cooling, flexibly matching business dynamic adjustment);

[0039] The wind-liquid compatible design avoids the dependence on a single cooling technology, and the proportion of air cooling and liquid cooling can be adjusted in real time through an intelligent control system to match the IT load changes (such as diurnal flow fluctuation, seasonal business peak), thereby reducing PUE (power utilization efficiency).

[0040] In use: after the fan 26 is started, the hot air flow discharged by the server unit 4 is sucked into the inside of the wind wall 2; the hot air flow first contacts the air outlet plate 54 and flows towards the cold water coil 22;

[0041] The thrust of the hot air flow drives the air outlet plate 54 to move towards the cold water coil 22, at this time, the elastic extension structure is stretched to adjust the distance between the air outlet plate 54 and the cold water coil 22 (if the distance is too small, the wind resistance is large, and if the distance is too large, the heat exchange is insufficient), and the differential deformation of the thermal expansion and contraction deflection structure after absorbing the heat of the hot air flow adjusts the direction and position of the hot air flow discharged by the air outlet plate 54;

[0042] Then, the water in the cooling source 1 is injected into the cold water coil 22 by the cooling pump, and when the water flows in the cold water coil 22, it directly exchanges heat with the hot air flow outside the cold water coil 22, absorbs heat and heats up, and the heated water flows into the heat exchanger 21 and exchanges heat with the fluorine medium in the connecting pipe 24 for the second time: at this time, the fluorine medium is throttled by the expansion valve 25 to be low-temperature and low-pressure liquid, absorbs the heat of the water in the heat exchanger 21, and evaporates into gas; the water is cooled and returns to the cooling source 1, thereby forming a cycle of use;

[0043] Liquid cooling, at this time the water inside the cooling source 1 is injected into the inside of the cooling capacity distribution assembly 3 by the cooling pump, the water enters the server unit 4 along the cooling capacity distribution assembly 3, and the server unit 4 is heat exchanged, and after heat exchange, it flows back to the inside of the cooling source 1 along the cooling capacity distribution assembly 3;

[0044] Water cooling and liquid cooling are synchronized, and the water inside the cooling source 1 enters the inside of the cooling capacity distribution assembly 3 and the inside of the cooling water coil 22 at the same time, that is, water cooling and liquid cooling are simultaneously operated.

[0045] In order to realize the above-mentioned example, how to make the air outlet plate 54 move towards the outside of the cooling water coil 22, the following solutions are proposed, such as Figure 2 and Figure 3 As shown in the drawings, the elastic expansion structure includes a fixed strip 51, the fixed strip 51 is fixedly installed on the outer surface of the fan 26, one end of the fixed strip 51 is provided with a positioning hole, and the spring expansion rod 52 is symmetrically embedded and installed at the position of the positioning hole. A connecting sleeve 53 is connected between the two spring expansion rods 52, and the connecting sleeve 53 is fixedly connected between one end of the connecting sleeve 53 and one end of the air outlet plate 54 close to the fan 26. The air outlet plate 54 is internally provided with a cavity, the cavity is connected with the air outlet of the fan 26, and the air outlet plate 54 is internally provided with a receiving cavity close to the fan 26. The outer surface of the air outlet plate 54 away from the fan 26 is provided with a circular hole at equal intervals;

[0046] Because the fan 26 generates hot air flow when running, the hot air flow enters the inside of the connecting sleeve 53, and then enters the inside of the air outlet plate 54 through the connecting sleeve 53. At this time, the hot air flow is pushed to move the air outlet plate 54 by the blocking of the air outlet plate 54. When the air outlet plate 54 moves, the spring expansion rod 52 is stretched through the connecting sleeve 53, so as to change the distance between the air outlet plate 54 and the cooling water coil 22, so that the air outlet plate 54 enters the outside of the cooling water coil 22, thereby realizing the function of guiding the hot air flow.

[0047] In order to realize the above-mentioned example, how to make the circular hole inside be blocked, and change the direction of the hot air flow discharged from the circular hole, the following solutions are proposed, such as Figure 4 and Figure 5As shown, the thermal expansion and contraction deflection structure includes a circular ring 55 fixedly installed inside the circular hole of the air outlet plate 54, the end of the air outlet plate 54 inside close to the fan 26 is symmetrically embedded with two fixed sleeves 56, the inside of the two fixed sleeves 56 are both slidingly connected with movable rods 57, the outer side of the two movable rods 57 and the inner wall of the two fixed sleeves 56 are both fixedly connected with expansion pieces 58, one end of the two movable rods 57 is movably connected with connecting strips 59, the two connecting strips 59 are fixedly connected with the same blocking block 510 (the shape of the blocking block 510 is conical, and the diameter of the end of the blocking block 510 close to the end face of the circular ring 55 is smaller than the diameter of the other end), the shape of the movable rod 57 is T-shaped, the expansion piece 58 is sleeved outside the smallest diameter of the expansion piece 58 and is fixedly connected with the end face of the largest diameter of the expansion piece 58, the number ratio of the connecting strips 59 and the blocking block 510 is two to one, one of the connecting strips 59 inside the blocking block 510 is provided with a guide groove, and the other connecting strip 59 and the inside of the guide groove are both rotatably connected with cylinders, the outer side of the cylinder is welded with a baffle, the baffle is welded and connected between the end face of the movable rod 57 away from the circular ring 55, and the materials of the two expansion pieces 58 are copper and aluminum respectively, and the shape of the expansion piece 58 is circular ring.

[0048] The hot air flow enters the edge of the circular ring 55 along the blocking block 510, at this time, the hot air flow flows along the outer side of the fixed sleeve 56, and the fixed sleeve 56 conducts heat in the hot air flow to the expansion piece 58, so that the expansion piece 58 (copper / aluminum material, different thermal expansion coefficients) in the connecting sleeve 53 absorbs the heat of the hot air flow and generates differential deformation, when the two are synchronously moved, the expansion piece 58 expands to drive the movable rod 57 to move in the fixed sleeve 56, when the movable rod 57 moves, the connecting strip 59 moves towards the end face of the circular ring 55, thereby causing the hot air flow in the inside of the circular ring 55 to reduce, causing the flow rate in the inside of the remaining circular holes of the air outlet plate 54 to increase, and at the same time, due to the difference in movement distance, the blocking block 510 is deflected (the connecting strip 59 moves the cylinder by pushing the cylinder through the baffle, is constrained by the connecting strip 59, the cylinder slides along the guide groove and rotates in the connecting strip 59 with the guide groove; the cylinder only rotates around the shaft in the connecting strip 59 without the guide groove; the differential motion of the two cylinders exerts a non-collinear pulling force on the blocking block 510 through the two connecting strips 59, forming a deflection torque around the center axis of the blocking block 510, and the blocking block 510 is deflected around its center axis (coinciding with the axis of the circular hole of the air outlet plate 54) under the action of the torque, and the deflection angle dynamically changes with the temperature of the hot air flow; after deflection, the direction of the ventilation section of the circular hole of the air outlet plate 54 is changed, so that the hot air flow uniformly covers the outer surface of the cold water coil 22, eliminating the heat exchange dead angle), realizing the guidance of the hot air flow at different positions outside the cold water coil 22, avoiding the waste of local heat exchange saturation of the cold water coil 22 and idling of the remaining parts, uniformly and efficiently utilizing the heat exchange area of the entire cold water coil 22, and improving the heat exchange efficiency.

[0049] Working principle: in the actual use process, the fan 26 is started, and the hot air flow discharged by the server unit 4 is sucked into the inside of the wind wall 2;

[0050] At this time, when the fan 26 operates, the hot air flow is guided into the inside of the connecting sleeve 53, and then into the inside of the air outlet plate 54. At this time, the hot air flow drives the air outlet plate 54 to move, and the air outlet plate 54 moves to stretch the spring telescopic rod 52 through the connecting sleeve 53. At this time, the position of the air outlet plate 54 is adjusted (the spring telescopic rod 52 is used to reset the air outlet plate 54 when the fan 26 stops, so as to increase the distance between the air outlet plate 54 and the cold water coil 22), thereby reducing the distance between the air outlet plate 54 and the cold water coil 22. At this time, the hot air flow directly enters the outside of the cold water coil 22 along the air outlet plate 54, can constrain the hot air flow, and makes the hot air flow evenly enter the outside of the cold water coil 22.

[0051] When the hot air flow is discharged along the circular hole of the air outlet plate 54, at this time, the hot air flow enters the edge of the circular ring 55 along the blocking block 510, and the hot air flow flows along the outside of the fixed sleeve 56. The fixed sleeve 56 absorbs the heat in the hot air flow and conducts it to the telescopic piece 58, so that the telescopic piece 58 (copper / aluminum material, different thermal expansion coefficients) in the connecting sleeve 53 absorbs the heat of the hot air flow and generates differential deformation. When the two move synchronously, the telescopic piece 58 expands to drive the movable rod 57 to move in the fixed sleeve 56. When the movable rod 57 moves, the connecting strip 59 moves towards one end surface of the circular ring 55, thereby causing the hot air flow in the circular ring 55 to reduce, causing the flow rate in the remaining circular holes of the air outlet plate 54 to increase, and at the same time, due to the difference in moving distance, the blocking block 510 is deflected, so that the hot air flow enters different positions outside the cold water coil 22, thereby improving the use effect of the cold water coil 22.

[0052] Then, the water in the cooling source 1 is injected into the cold water coil 22 by the cooling pump. When the water flows in the cold water coil 22, it directly exchanges heat with the hot air flow blown out by the air outlet plate 54 outside the cold water coil 22, and the water is heated after absorbing heat. The water flows into the heat exchanger 21 and exchanges heat with the fluorine medium in the connecting pipe 24 for the second time. At this time, the fluorine medium is throttled by the expansion valve 25 to be low-temperature and low-pressure liquid, absorbs the heat of the water in the heat exchanger 21, and evaporates into gas. The water is cooled and flows back to the cooling source 1, thereby forming a circulating use.

[0053] At this time, the water in the cooling source 1 is also injected into the inside of the cold energy distribution assembly 3, flows along the cold energy distribution assembly 3 to the server unit 4, exchanges heat with the server unit 4, and then flows back to the inside of the cooling source 1 along the cold energy distribution assembly 3.

[0054] The above examples are only used to illustrate the technical solutions of the present application, and not to limit them.

Claims

1. A heat dissipation refrigeration device for a server room, characterized in that, The utility model relates to a liquid cooling system, including: A cooling source (1) is arranged to provide a refrigeration source; A wind wall (2) is connected to the cooling source (1) by a pipeline, and the wind wall (2) is provided with a heat exchanger (21), a cold water coil (22) connected to the heat exchanger (21), a compressor (23), a connecting pipe (24) connected to the compressor (23), and an expansion valve (25) connected to the heat exchanger (21) by the connecting pipe (24). A fan (26) is arranged on the wind wall (2) to form an air cooling channel; A cold energy distribution assembly (3) is connected to the cooling source (1) by a pipeline to distribute cold energy to meet the business needs of different liquid cooling ratios; A server unit (4) is connected to the cold energy distribution assembly (3) to dissipate heat by receiving distributed cold energy; The air volume diversion structure includes an elastic extension structure, an air outlet plate (54), and a thermal expansion and cold contraction deflection structure; The elastic extension structure is fixedly installed above the fan (26), and the extension end is connected to the air outlet plate (54) to adjust the distance between the air outlet plate (54) and the cold water coil (22); The air outlet plate (54) is fixed to the extension end of the elastic extension structure to guide and discharge the airflow; The thermal expansion and cold contraction deflection structure is embedded in the air outlet plate (54) and can deform according to the difference in absorbed heat to change the flow direction and air outlet position of the airflow; The thermal expansion and cold contraction deflection structure includes a circular ring (55) fixedly installed inside a circular hole of the air outlet plate (54), a fixed sleeve (56) symmetrically embedded and installed on one end of the air outlet plate (54) close to the fan (26), an active rod (57) slidingly connected inside each of the two fixed sleeves (56), an extension piece (58) fixedly connected between the outer side of each of the two active rods (57) and the inner wall of each of the two fixed sleeves (56), a connecting strip (59) movably connected to one end of each of the two active rods (57), and a same blocking block (510) fixedly connected between the two connecting strips (59); The active rod (57) is T-shaped, and the extension piece (58) is sleeved outside the minimum diameter of the extension piece (58) and fixedly connected to the end face of the maximum diameter of the extension piece (58); The number ratio of the connecting strips (59) to the blocking block (510) is two to one, a guide groove is formed in one of the connecting strips (59) on the blocking block (510), a cylinder is rotatably connected to the other connecting strip (59) and the guide groove, a baffle is welded to the outer side of the cylinder, and the baffle is welded to the end face of the active rod (57) away from the circular ring (55).

2. The heat dissipation refrigeration device for a server room according to claim 1, characterized in that, The substance inside the cold water coil (22) is water, and the substance inside the connecting pipe (24) is fluorine.

3. The heat dissipation refrigeration device for a server room according to claim 1, characterized in that, The elastic telescopic structure comprises a fixed strip (51), which is fixedly installed at the top end of the outer surface of the fan (26), one end of the fixed strip (51) is symmetrically embedded with a spring telescopic rod (52), the same connecting sleeve (53) is clamped and installed between the movable ends of the two spring telescopic rods (52), and one end of the connecting sleeve (53) is fixedly connected with one end of the air outlet plate (54) close to the fan (26).

4. The heat dissipation refrigeration device for a server room according to claim 3, characterized in that, A cavity is formed in the air outlet plate (54), the cavity is connected with the air outlet of the fan (26), a receiving cavity is formed in the inner end of the air outlet plate (54) close to the fan (26), and a circular hole is formed in the outer surface of the end of the air outlet plate (54) away from the fan (26).

5. The heat dissipation refrigeration device for a server room according to claim 4, characterized in that, The materials of the two telescopic members (58) are copper and aluminum respectively, and the telescopic members (58) are in the shape of a circular ring.

6. The heat dissipation refrigeration device for a server room according to claim 1, characterized in that, The cooling pump is connected with the water outlet end of the cooling source (1), and the water outlet end of the cooling pump is connected with the heat exchanger (21) through a pipeline.

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