High-reliability air-cooled screw chiller units for data centers

Abstract

This invention discloses a high-reliability air-cooled screw chiller unit for data centers, relating to the technical field of air-cooled screw chiller units. The heat exchange chamber has a first partition and a second partition in the middle of its inner wall. The second partition is located behind the outer wall of the first partition. Air inlets are provided on both the front and rear sides of the outer wall of the heat exchange chamber. A protective mesh is provided at the connection between the air inlets and the heat exchange chamber. Finned tube clusters are embedded in the outer walls of the first and second partitions. An air inlet pipe is provided on the upper side of the outer wall of the finned tube clusters, and a liquid outlet pipe is provided on the lower side. A rotating shaft is provided through the middle of the inner wall of the heat exchange chamber, and a baffle is provided on the outer wall of the rotating shaft. This invention, by installing a heat exchange chamber, achieves alternating bidirectional dust removal. It can reverse the airflow direction to remove dust from the finned tube clusters on the other side, avoiding dust accumulation. The bidirectional airflow improves the heat exchange capacity of the equipment, enhancing its reliability and performance stability.

Description

Technical Field

[0001] This invention relates to the field of air-cooled screw chiller technology, specifically to a high-reliability air-cooled screw chiller for data centers. Background Technology

[0002] With the rapid development of the digital economy and computing power industry, data centers, as the core carrier of computing power infrastructure, have seen a continuous increase in the heat density of a single rack, which has placed stringent requirements on the continuous operation reliability, energy efficiency, and extreme working condition support capabilities of cooling systems. Air-cooled screw chillers, which do not require a cooling tower or complex water treatment system, are suitable for modular data centers and water-scarce areas, and have become one of the mainstream choices for data center cooling systems.

[0003] Existing conventional air-cooled screw chiller units are difficult to fully adapt to the specific operational needs of data centers. Data center cooling systems need to operate continuously, and air-cooled condensers are exposed to the outdoor environment for a long time. Particulate matter such as sand, willow catkins, and floating dust will continuously adhere to the fin surface, causing air duct blockage and increased heat exchange thermal resistance. This not only increases cooling energy consumption, but in severe cases, it can also trigger high-pressure protection shutdown, affecting the operational safety and stability of data centers.

[0004] Patent CN104214982B discloses a high-precision, low-cost air-cooled screw chiller unit and its control method. The patent realizes independent loading control and independent unloading control among multiple stepless adjustable screw compressors, as well as first-in-last-out control. It achieves high-precision control of the chiller unit's water temperature without the need to add a slider position sensor to the stepless adjustable screw compressor.

[0005] The aforementioned patent controls the independent start-up, loading, and unloading of the continuously variable screw compressor by controlling multiple regulating solenoid valves. It achieves independent loading control among the multi-system continuously variable screw compressors through program control, ensuring the relative continuity of the overall cooling capacity within the water temperature loading range and improving water temperature control accuracy during loading. It also achieves independent unloading control among the multi-system continuously variable screw compressors through program control, ensuring the relative continuity of the overall cooling capacity within the water temperature unloading range and improving water temperature control accuracy during unloading. Furthermore, it achieves first-in-last-out control among the multi-system continuously variable screw compressors through program control, further improving water temperature control accuracy, thus achieving the goal of improving overall accuracy. However, there is room for optimization in condenser ash accumulation treatment.

[0006] Therefore, this application proposes a high-reliability air-cooled screw chiller unit for data centers with alternating bidirectional dust removal. Summary of the Invention

[0007] The purpose of this invention is to provide a high-reliability air-cooled screw chiller unit for data centers, in order to solve the technical problems mentioned in the background art, such as condenser dust accumulation leading to decreased equipment performance and increased energy consumption.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a high-reliability air-cooled screw chiller unit for data centers, comprising a base, a main unit cavity disposed on the upper side of the outer wall of the base, a heat exchange cavity disposed on the upper side of the outer wall of the main unit cavity, a partition plate one and a partition plate two disposed in the middle of the inner wall of the heat exchange cavity, the partition plate two being located behind the outer wall of the partition plate one, air inlets being provided through the front and rear sides of the outer wall of the heat exchange cavity, a protective mesh being provided at the connection between the air inlets and the heat exchange cavity, finned tube clusters being embedded in the outer walls of the partition plate one and the partition plate two, an air inlet pipe being disposed on the upper side of the outer wall of the finned tube clusters, a liquid outlet pipe being disposed on the lower side of the outer wall of the finned tube clusters, a rotating shaft one being provided through the middle of the inner wall of the heat exchange cavity, a baffle plate one being disposed on the outer wall of the rotating shaft one, an angle sensor being disposed at the connection between the rotating shaft one and the heat exchange cavity, a controller being disposed on the left side of the outer wall of the base, and the angle sensor being connected to the controller via a signal line.

[0009] Preferably, a motor is installed in the middle of the inner wall of the main unit cavity, and the output end of the motor is connected to a rotating shaft. A compressor is installed on the left side of the inner wall of the main unit cavity, and an oil separator is installed on the right side of the inner wall of the main unit cavity. The compressor is connected to the oil separator through a connecting pipe. An oil filter and an oil cooler are connected in sequence on the rear side of the outer wall of the oil separator. The oil cooler is connected to the compressor through a connecting pipe. An evaporator is installed on the right side of the outer wall of the oil separator. A reversing valve assembly is installed on the upper side of the inner wall of the main unit cavity. The reversing valve assembly is connected to the rotating shaft through a bevel gear pair. The air inlet of the reversing valve assembly is connected to the air outlet of the oil separator. The air outlet of the reversing valve assembly is connected to the air inlet pipe. The liquid return port of the reversing valve assembly is connected to the liquid outlet pipe.

[0010] Preferably, the base has ash discharge ports on both the front and rear sides of its outer wall, and a baffle plate is provided at the connection between the ash discharge port and the base. The baffle plate is connected to the base via a rotating shaft, and the rotating shaft is connected to a rotating shaft via a transmission assembly.

[0011] Preferably, 6-8 sets of guide louvers are equidistantly arranged on the front side of the outer wall of partition one and the rear side of the outer wall of partition two. The guide louvers are all connected to the heat exchange cavity through rotating shaft three. The rotating shaft three are connected by connecting rods. The connecting rods are connected to rotating shaft one through a transmission assembly. A limit block is provided at the connection between rotating shaft three and heat exchange cavity.

[0012] Preferably, a cooling chamber is provided on the upper side of the outer wall of the heat exchange chamber, a fan is provided on the upper side of the inner wall of the cooling chamber, a second motor is provided on the upper side of the outer wall of the fan, the fan is connected to the output end of the second motor, a guide shroud is fitted on the outer wall of the second motor, a vent is provided through the upper side of the inner wall of the heat exchange chamber, a guide pipe is provided through the heat exchange chamber on the front side of the outer wall of the first partition and the rear side of the outer wall of the second partition, the two ends of the guide pipe are connected to the heat exchange chamber and the guide shroud respectively, a baffle is provided at the connection between the guide pipe and the heat exchange chamber, the baffle is connected to the first rotating shaft through an eccentric wheel, and the second motor is connected to the controller through a signal line.

[0013] Preferably, the baffle consists of two pieces arranged coplanarly at 180°, and wind-side differential pressure sensors are installed on both the left and right sides of the inner wall of the heat exchange chamber. The wind-side differential pressure sensors are connected to the controller via signal lines.

[0014] Preferably, the lower part of the front and rear sides of the inner wall of the heat exchange chamber is provided with a flow guide groove, which is connected to the ash discharge port. A flow guide cover is provided on the front side of the outer wall of the ash discharge port, and an ash accumulation monitoring photoelectric sensor is provided on the rear side of the outer wall of the ash discharge port. The ash accumulation monitoring photoelectric sensor is connected to the controller through a signal line.

[0015] Preferably, the outer wall of the base is provided with a water inlet and a water outlet on the left and right sides respectively. The water inlet and the water outlet are connected to the water inlet and water outlet of the evaporator respectively through connecting pipes. The liquid inlet of the evaporator is connected to the reversing valve group, and the gas return port of the evaporator is connected to the compressor.

[0016] Preferably, a sealing ring is provided at the connection between the rotating shaft and the main unit cavity, the heat exchange cavity, the reversing valve group and the cooling cavity.

[0017] Preferably, a recovery port is provided on the lower side of the outer wall of the liquid outlet pipe, and the recovery port is connected to the compressor through a connecting pipe.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This invention, by installing a heat exchange chamber, realizes the function of alternating bidirectional dust removal, which solves the problem of performance degradation caused by condenser dust accumulation and insufficient cooling capacity when heat exchange demand increases. It can reverse the airflow to remove dust from the finned tube cluster on the other side by switching the air inlet direction, avoiding dust accumulation. It can improve the heat exchange capacity of the equipment by bidirectional airflow, and improve the reliability and performance stability of the equipment.

[0020] 2. This invention, by installing a guide channel, a dust discharge port, a second baffle, a second rotating shaft, and a guide cover, achieves the function of synchronous dust discharge, solving the problems of dust accumulation and secondary stirring and dust backflow damaging the equipment. It can automatically open the second baffle corresponding to the blowing direction according to the air intake direction of the equipment, so as to discharge the blown dust in time and prevent dust backflow into the equipment, thereby improving the cleaning efficiency and reliability of the equipment.

[0021] 3. This invention, by installing guide louvers, a rotating shaft, a connecting rod, and a limiting block, achieves the function of sorting the incoming airflow, solving the problems of uneven heat exchange and low heat exchange efficiency caused by multiple airflow vortices and uneven wind speed distribution. It can eliminate edge vortices in the incoming airflow, reduce the wind resistance of the air duct, improve the utilization rate of the heat exchange area, avoid low heat exchange efficiency of the equipment, and at the same time prevent turbulent airflow from stirring up dust.

[0022] 4. This invention achieves directional heat dissipation by installing a fan, a second motor, an air guide shroud, an air guide pipe, and a third baffle. It solves the problems of high failure rate of the second motor, high energy consumption of the independent cooling system, and reduced heat exchange efficiency of the equipment under high heat exchange demand. It can dissipate heat from the second motor synchronously according to the air inlet direction and perform bidirectional air blowing heat exchange on the second motor under high heat exchange demand, thereby improving the operational stability and reliability of the equipment. Attached Figure Description

[0023] Figure 1 This is a front view structural diagram of the present invention;

[0024] Figure 2 This is a front view of the present invention.

[0025] Figure 3 This is a schematic diagram of the heat exchange cavity structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the main unit cavity structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the base structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the airflow guide louver structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the cooling chamber structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the flow channel structure of the present invention.

[0031] In the diagram: 1. Base; 2. Main unit cavity; 3. Heat exchange cavity; 4. Partition 1; 5. Partition 2; 6. Air inlet; 7. Protective net; 8. Finned tube cluster; 9. Air inlet pipe; 10. Liquid outlet pipe; 11. Rotating shaft 1; 12. Baffle 1; 13. Angle sensor; 14. Controller; 15. Motor 1; 16. Compressor; 17. Oil separator; 18. Oil filter; 19. Oil cooler; 20. Evaporator; 21. Reversing valve assembly; 22. Ash discharge port; 23. Baffle. 24. Rotating Shaft II; 25. Guide Louver; 26. Rotating Shaft III; 27. Connecting Rod; 28. Limiting Block; 29. ​​Cooling Chamber; 30. Fan; 31. Motor II; 32. Air Guide Cover; 33. Ventilation Opening; 34. Air Guide Pipe; 35. Baffle III; 36. Eccentric Wheel; 37. Wind Side Differential Pressure Sensor; 38. Guide Slot; 39. Guide Cover; 40. Dust Accumulation Monitoring Photoelectric Sensor; 41. Water Inlet; 42. Water Outlet; 43. Sealing Ring; 44. Recycling Port. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 A high-reliability air-cooled screw chiller unit for data centers includes a base 1. A main unit cavity 2 is located on the upper side of the outer wall of the base 1. A heat exchange cavity 3 is located on the upper side of the outer wall of the main unit cavity 2. A first partition 4 and a second partition 5 are located in the middle of the inner wall of the heat exchange cavity 3. The second partition 5 is located behind the outer wall of the first partition 4. Air inlets 6 are provided through the front and rear sides of the outer wall of the heat exchange cavity 3. A protective mesh 7 is provided at the connection between the air inlets 6 and the heat exchange cavity 3. The outer walls of the first partition 4 and the second partition 5 are... The wall is fitted with a finned tube cluster 8. An air inlet pipe 9 is provided on the upper side of the outer wall of the finned tube cluster 8, and a liquid outlet pipe 10 is provided on the lower side of the outer wall of the finned tube cluster 8. A rotating shaft 11 is provided through the middle of the inner wall of the heat exchange chamber 3. A baffle 12 is provided on the outer wall of the rotating shaft 11. An angle sensor 13 is provided at the connection between the rotating shaft 11 and the heat exchange chamber 3. A controller 14 is provided on the left side of the outer wall of the base 1. The angle sensor 13 is connected to the controller 14 through a signal line.

[0036] A motor 15 is installed in the middle of the inner wall of the main unit cavity 2. The output end of the motor 15 is connected to the rotating shaft 11. A compressor 16 is installed on the left side of the inner wall of the main unit cavity 2. An oil separator 17 is installed on the right side of the inner wall of the main unit cavity 2. The compressor 16 is connected to the oil separator 17 through a connecting pipe. An oil filter 18 and an oil cooler 19 are connected in sequence to the rear side of the outer wall of the oil separator 17. The oil cooler 19 is connected to the compressor 16 through a connecting pipe. An evaporator 20 is installed on the right side of the outer wall of the oil separator 17. A reversing valve assembly 21 is installed on the upper side of the inner wall of the main unit cavity 2. The reversing valve assembly 21 is connected to the rotating shaft 11 through a bevel gear pair. The air inlet of the reversing valve assembly 21 is connected to the air outlet of the oil separator 17. The air outlet of the reversing valve assembly 21 is connected to the air inlet pipe 9. The liquid return port of the reversing valve assembly 21 is connected to the liquid outlet pipe 10.

[0037] The baffle 12 consists of two pieces, which are arranged in a 180° coplanar manner. Wind-side differential pressure sensors 37 are installed on both the left and right sides of the inner wall of the heat exchange chamber 3. The wind-side differential pressure sensors 37 are connected to the controller 14 through signal lines.

[0038] A sealing ring 43 is provided at the connection between the rotating shaft 11 and the main unit cavity 2, the heat exchange cavity 3, the reversing valve group 21 and the cooling cavity 29;

[0039] A recovery port 44 is provided on the lower side of the outer wall of the liquid outlet pipe 10, and the recovery port 44 is connected to the compressor 16 through a connecting pipe.

[0040] Furthermore, after the equipment is started, the compressor 16 compresses the low-temperature, low-pressure refrigerant vapor into a high-temperature, high-pressure gaseous state. After the lubricating oil is separated by the oil separator 17, the high-pressure gaseous refrigerant is delivered to the reversing valve assembly 21. The refrigerant enters the finned tube array 8 through the inlet pipe 9. After circulating in the finned tube array 8 and exchanging heat with the outdoor air, it condenses into a high-pressure liquid state. The high-pressure liquid refrigerant flows from the outlet pipe 10 into the reversing valve assembly 21 and flows out from the return port. After the high-pressure liquid refrigerant is depressurized by the throttling element, it enters the evaporator 20, where it exchanges heat with the chilled water in the data center loop. After absorbing heat, it evaporates into a gaseous state and finally returns to the compressor 16, completing the refrigeration cycle and continuously providing cooling capacity to the data center. During this process, the partition 4 and partition 5 in the heat exchange chamber 3 divide the heat exchange chamber 3 into front and back sections. The system consists of three parts: the air chamber, the middle air chamber, and the rear air chamber. Controller 14 controls motor 15 to rotate shaft 11 according to the data center's cooling requirements. This causes two baffles 12, arranged 180° coplanarly, to rotate. Angle sensor 13 detects the rotation angle of baffle 12 until it is fully against partition 25, sealing the finned tube clusters 8 on partition 25 with the middle air chamber, leaving only a 1%-3% clearance for reverse purging. Simultaneously, rotating shaft 11 drives reversing valve assembly 21 via bevel gear pair to synchronously switch, connecting the air inlet pipe 9 and liquid outlet pipe 10 of the finned tube clusters 8 on partition 14. The finned tube clusters 8 on partition 25 close the passage, and the fan 30 in cooling chamber 29 operates, creating negative pressure with the middle air chamber, allowing outdoor air to pass through. Air enters the heat exchange chamber 3 through the inlet 6 at the front, passes through the finned tube cluster 8 on the partition 4, exchanges heat with the high-temperature refrigerant inside the finned tube cluster 8, and then enters the intermediate air chamber. It is then discharged upwards by the fan 30. Simultaneously, the negative pressure in the intermediate air chamber causes a small amount of air to pass through the finned tube cluster 8 on the partition 5 in the reverse direction and be discharged from the inlet 6 at the rear of the heat exchange chamber 3. This reverse airflow can blow away the accumulated dust on the finned tube cluster 8 at the partition 5. The wind-side differential pressure sensor 37 monitors the wind resistance of the finned tube cluster 8 in real time. If the dust on the finned tube cluster 8 accumulates to a certain level, the wind resistance of the finned tube cluster 8 increases synchronously. If the wind-side differential pressure sensor 37 detects that the wind resistance of the finned tube cluster 8 increases to a set threshold, the controller 14 controls the motor 15 to drive... The rotating shaft 11 rotates 180°, switching the airflow direction in the heat exchange chamber 3, causing the finned tube clusters 8 on the second baffle 5 to start working, while the finned tube clusters 8 on the first baffle 4 stop working, and the finned tube clusters 8 on the first baffle 4 are purged, causing the finned tube clusters 8 on the first baffle 4 and the second baffle 5 to operate alternately. If the heat exchange demand of the data center increases, the controller 14 controls the motor 15 to drive the rotating shaft 11 to rotate 90°, causing the two baffles 12 to rotate to an angle parallel to the first baffle 4 and the second baffle 5, so that the finned tube clusters 8 on the first baffle 4 and the second baffle 5 are in an open state. The reversing valve group 21 switches synchronously, and the air inlet pipes 9 and liquid outlet pipes 10 of the two sets of finned tube clusters 8 are fully connected, forming a parallel refrigerant circuit between the two sets of finned tube clusters 8.Outdoor air enters simultaneously from the air inlets 6 on both the front and rear sides of the heat exchange chamber 3. The outdoor air flows forward through the finned tube cluster 8, and after heat exchange, it converges into the intermediate air chamber and is discharged upwards. The bottom recovery port 44 of the liquid outlet pipe 10 continuously recovers accumulated oil from the pipeline and sends it to the compressor 16 to prevent oil shortage and wear.

[0041] Example 2: Please refer to Figure 1 , Figure 2 , Figure 5 and Figure 8 A high-reliability air-cooled screw chiller unit for data centers includes a base 1. A main unit cavity 2 is located on the upper side of the outer wall of the base 1. A heat exchange cavity 3 is located on the upper side of the outer wall of the main unit cavity 2. A first partition 4 and a second partition 5 are located in the middle of the inner wall of the heat exchange cavity 3. The second partition 5 is located behind the outer wall of the first partition 4. Air inlets 6 are provided through the front and rear sides of the outer wall of the heat exchange cavity 3. A protective mesh 7 is provided at the connection between the air inlets 6 and the heat exchange cavity 3. The outer walls of the first partition 4 and the second partition 5 are... The wall is fitted with a finned tube cluster 8. An air inlet pipe 9 is provided on the upper side of the outer wall of the finned tube cluster 8, and a liquid outlet pipe 10 is provided on the lower side of the outer wall of the finned tube cluster 8. A rotating shaft 11 is provided through the middle of the inner wall of the heat exchange chamber 3. A baffle 12 is provided on the outer wall of the rotating shaft 11. An angle sensor 13 is provided at the connection between the rotating shaft 11 and the heat exchange chamber 3. A controller 14 is provided on the left side of the outer wall of the base 1. The angle sensor 13 is connected to the controller 14 through a signal line.

[0042] The base 1 has ash discharge ports 22 on both the front and rear sides of its outer wall. A baffle 23 is provided at the connection between the ash discharge port 22 and the base 1. The baffle 23 is connected to the base 1 through a rotating shaft 24. The rotating shaft 24 is connected to the rotating shaft 11 through a transmission assembly.

[0043] The heat exchange chamber 3 has flow guide grooves 38 on the lower front and rear sides of the inner wall of the heat exchange chamber 3. The flow guide grooves 38 are connected to the ash discharge port 22. The flow guide hood 39 is provided on the front side of the outer wall of the ash discharge port 22. The ash accumulation monitoring photoelectric sensor 40 is provided on the rear side of the outer wall of the ash discharge port 22. The ash accumulation monitoring photoelectric sensor 40 is connected to the controller 14 through a signal line.

[0044] Furthermore, when the finned tube cluster 8 on partition 4 is opened, outdoor air enters the heat exchange chamber 3 from the air inlet 6 on the front side of the heat exchange chamber 3. The air passes through the finned tube cluster 8 at partition 4 in a forward direction, and a small amount of air passes through the finned tube cluster 8 at partition 5 in a reverse direction from the reserved purging gap, purging the finned tube cluster 8 at partition 5. This causes the dust adhering to the finned tube cluster 8 to be removed under the impact of the airflow and fall into the guide channel 38 under the action of gravity. The inclined guide channel 38 transports the dust to the ash discharge port 22 at the rear side of the base 1. During the process of the rotating shaft 11 being rotated by the motor 15, the rotating shaft 24 is connected to the rotating shaft 11 through a transmission assembly consisting of a vertical connecting rod and an eccentric disk. When purging the finned tube cluster 8 at partition 25, the baffle 23 that closes the ash discharge port 22 at the rear side of the base 1 is driven by the rotating shaft 11. 4. Simultaneously open the second baffle 23 to allow dust to be discharged from the ash discharge port 22. When the finned tube cluster 8 on the second baffle 5 is opened, the ash discharge port 22 on the front side of the base 1 opens simultaneously. The reverse airflow blows away the dust attached to the finned tube cluster 8 at the first baffle 4 and discharges it from the front ash discharge port 22. When air enters the heat exchange chamber 3 through the front air inlet 6, the front ash discharge port 22 of the base 1 is closed and the rear ash discharge port 22 of the base 1 is opened. When air enters the heat exchange chamber 3 through the rear air inlet 6, the front ash discharge port 22 of the base 1 is opened and the rear ash discharge port 22 of the base 1 is closed. When the finned tube cluster 8 on the first baffle 4 and the second baffle 5 are both in a flow state, the air inlets 6 on both the front and rear sides of the heat exchange chamber 3 are both in a forward air intake state. At this time, the ash discharge ports 22 on both the front and rear sides of the base 1 are both in a closed state. At the same time, when the dust is discharged from the ash discharge port 22, the downward-bent guide shroud 39 prevents the dust from being re-inhaled.

[0045] Example 3: Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 6 A high-reliability air-cooled screw chiller unit for data centers includes a base 1. A main unit cavity 2 is located on the upper side of the outer wall of the base 1. A heat exchange cavity 3 is located on the upper side of the outer wall of the main unit cavity 2. A first partition 4 and a second partition 5 are located in the middle of the inner wall of the heat exchange cavity 3. The second partition 5 is located behind the outer wall of the first partition 4. Air inlets 6 are provided through the front and rear sides of the outer wall of the heat exchange cavity 3. A protective mesh 7 is provided at the connection between the air inlets 6 and the heat exchange cavity 3. The outer walls of the first partition 4 and the second partition 5 are... The wall is fitted with a finned tube cluster 8. An air inlet pipe 9 is provided on the upper side of the outer wall of the finned tube cluster 8, and a liquid outlet pipe 10 is provided on the lower side of the outer wall of the finned tube cluster 8. A rotating shaft 11 is provided through the middle of the inner wall of the heat exchange chamber 3. A baffle 12 is provided on the outer wall of the rotating shaft 11. An angle sensor 13 is provided at the connection between the rotating shaft 11 and the heat exchange chamber 3. A controller 14 is provided on the left side of the outer wall of the base 1. The angle sensor 13 is connected to the controller 14 through a signal line.

[0046] A motor 15 is installed in the middle of the inner wall of the main unit cavity 2. The output end of the motor 15 is connected to the rotating shaft 11. A compressor 16 is installed on the left side of the inner wall of the main unit cavity 2. An oil separator 17 is installed on the right side of the inner wall of the main unit cavity 2. The compressor 16 is connected to the oil separator 17 through a connecting pipe. An oil filter 18 and an oil cooler 19 are connected in sequence to the rear side of the outer wall of the oil separator 17. The oil cooler 19 is connected to the compressor 16 through a connecting pipe. An evaporator 20 is installed on the right side of the outer wall of the oil separator 17. A reversing valve assembly 21 is installed on the upper side of the inner wall of the main unit cavity 2. The reversing valve assembly 21 is connected to the rotating shaft 11 through a bevel gear pair. The air inlet of the reversing valve assembly 21 is connected to the air outlet of the oil separator 17. The air outlet of the reversing valve assembly 21 is connected to the air inlet pipe 9. The liquid return port of the reversing valve assembly 21 is connected to the liquid outlet pipe 10.

[0047] 6-8 sets of guide louvers 25 are equidistantly arranged on the front side of the outer wall of partition 4 and the rear side of the outer wall of partition 5. The guide louvers 25 are all connected to the heat exchange chamber 3 through rotating shaft 3 26. The rotating shaft 3 26 is connected to each other through connecting rod 27. The connecting rod 27 is connected to rotating shaft 11 through a transmission assembly. A limit block 28 is provided at the connection between rotating shaft 3 26 and heat exchange chamber 3.

[0048] Furthermore, motor 15 drives rotating shaft 11 to rotate, and under the action of baffle 12, the heat exchange chamber 3 is in a one-way ventilation state. Connecting rod 27 is connected to rotating shaft 11 by a transmission assembly consisting of angle conversion connecting rod and eccentric disk. Driven by rotating shaft 11, connecting rod 27 drives rotating shaft 26 to move synchronously, causing the air inlet louvers 25 in the heat exchange chamber 3 to rotate synchronously by 10°-15°. After the air inlet louvers 25 rotate into position, the limiting block 28... With the rotating shaft 26 engaged and positioned, the guide louvers 25 on the other side of the heat exchange chamber 3 rotate synchronously, assisting in the uniform distribution of the purging airflow. After the outdoor air enters the heat exchange chamber 3 unidirectionally from the air inlet 6, it first passes through the guide louvers 25 with a small angle deflection to rectify the originally turbulent airflow with obvious edge vortices into a uniformly distributed straight airflow, completely covering the entire windward surface of the finned tube cluster 8, eliminating the vortex dead zone at the edge of the finned tube cluster 8, and making the wind speed uniformly distributed along the height direction of the finned tube cluster 8. The uniformly distributed airflow can reduce the overall wind resistance and reduce the power consumption of the fan 30. At the same time, it can make full use of the heat exchange area of ​​the finned tube cluster 8 and avoid the high condensing temperature caused by insufficient local heat exchange. When the heat exchange demand of the data center increases, the rotating shaft 11, driven by the motor 15, switches the heat exchange chamber 3 to a bidirectional air intake mode. At this time, the connecting rod 27, driven by the rotating shaft 11, causes the guide louvers 25 to deflect 30°-45°. The heat exchange chamber 3 is simultaneously intaked from both the front and rear sides. After the airflow is processed by the guide louvers 25 with a large angle deflection, it is divided into multiple intermittent oblique jets that directly impact the gaps of the finned tube cluster 8, destroy the laminar boundary layer on the surface of the finned tube cluster 8, enhance the degree of airflow turbulence between the fins of the finned tube cluster 8, improve the convective heat exchange effect of the finned tube cluster 8, further reduce the condensing temperature and the exhaust pressure of the compressor 16, alleviate the cooling capacity decay under extreme high temperature, and improve the stability of the equipment under peak load operation.

[0049] Example 4: Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 7A high-reliability air-cooled screw chiller unit for data centers includes a base 1. A main unit cavity 2 is located on the upper side of the outer wall of the base 1. A heat exchange cavity 3 is located on the upper side of the outer wall of the main unit cavity 2. A first partition 4 and a second partition 5 are located in the middle of the inner wall of the heat exchange cavity 3. The second partition 5 is located behind the outer wall of the first partition 4. Air inlets 6 are provided through the front and rear sides of the outer wall of the heat exchange cavity 3. A protective mesh 7 is provided at the connection between the air inlets 6 and the heat exchange cavity 3. The outer walls of the first partition 4 and the second partition 5 are... The wall is fitted with a finned tube cluster 8. An air inlet pipe 9 is provided on the upper side of the outer wall of the finned tube cluster 8, and a liquid outlet pipe 10 is provided on the lower side of the outer wall of the finned tube cluster 8. A rotating shaft 11 is provided through the middle of the inner wall of the heat exchange chamber 3. A baffle 12 is provided on the outer wall of the rotating shaft 11. An angle sensor 13 is provided at the connection between the rotating shaft 11 and the heat exchange chamber 3. A controller 14 is provided on the left side of the outer wall of the base 1. The angle sensor 13 is connected to the controller 14 through a signal line.

[0050] A cooling chamber 29 is provided on the upper side of the outer wall of the heat exchange chamber 3. A fan 30 is provided on the upper side of the inner wall of the cooling chamber 29. A motor 31 is provided on the upper side of the outer wall of the fan 30. The output end of the fan 30 and the motor 31 are connected. A guide shroud 32 is fitted on the outer wall of the motor 31. A vent 33 is provided through the upper side of the inner wall of the heat exchange chamber 3. A guide pipe 34 is provided through the heat exchange chamber 3 on the front side of the outer wall of the partition 4 and the rear side of the outer wall of the partition 5. The two ends of the guide pipe 34 are connected to the heat exchange chamber 3 and the guide shroud 32 respectively. A baffle 35 is provided at the connection between the guide pipe 34 and the heat exchange chamber 3. The baffle 35 is connected to the rotating shaft 11 through the eccentric wheel 36. The motor 31 is connected to the controller 14 through a signal line.

[0051] Furthermore, when the heat exchange chamber 3 is in a single-sided air intake state, the rotating shaft 11 drives the baffle 35 to move via the eccentric wheel 36, causing the baffle 35 on the air intake side to open, connecting the air duct 34 to the air guide shroud 32 and the heat exchange chamber 3. The air duct 34 on the other side of the heat exchange chamber 3 is in a closed state. During the process of outdoor air entering the heat exchange chamber 3, the motor 2 31 drives the fan 30 to run, and through the vent 33, the air chamber in the heat exchange chamber 3 is kept under negative pressure. A portion of the low-temperature air entering the front or rear air chamber of the heat exchange chamber 3 is transported to the air guide shroud 32 through the air duct 34 to blow air and dissipate heat from the motor 2 31. Hot air is exhausted to the outside through the exhaust port of cooling chamber 29, and another part enters the middle air chamber. When heat exchange chamber 3 is in a bidirectional air intake state, the rotation of rotating shaft 11 is synchronously transmitted to baffle 35 through eccentric wheel 36, so that the air ducts 34 at the front air chamber and the rear air chamber in heat exchange chamber 3 open synchronously. Low temperature air is delivered from air duct 34 to air duct cover 32 to blow air and exchange heat on motor 2 31. There is no need to provide an additional cooling source for motor 2 31, which reduces the energy consumption of the equipment. The heat exchange rate of motor 2 31 can be adjusted according to the heat exchange demand of the data center, so that the equipment can operate stably under high heat exchange demand.

[0052] Example 5: Please refer to Figure 1 , Figure 3 and Figure 5 A high-reliability air-cooled screw chiller unit for data centers includes a base 1. A main unit cavity 2 is located on the upper side of the outer wall of the base 1. A heat exchange cavity 3 is located on the upper side of the outer wall of the main unit cavity 2. A first partition 4 and a second partition 5 are located in the middle of the inner wall of the heat exchange cavity 3. The second partition 5 is located behind the outer wall of the first partition 4. Air inlets 6 are provided through the front and rear sides of the outer wall of the heat exchange cavity 3. A protective mesh 7 is provided at the connection between the air inlets 6 and the heat exchange cavity 3. The outer walls of the first partition 4 and the second partition 5 are... The wall is fitted with a finned tube cluster 8. An air inlet pipe 9 is provided on the upper side of the outer wall of the finned tube cluster 8, and a liquid outlet pipe 10 is provided on the lower side of the outer wall of the finned tube cluster 8. A rotating shaft 11 is provided through the middle of the inner wall of the heat exchange chamber 3. A baffle 12 is provided on the outer wall of the rotating shaft 11. An angle sensor 13 is provided at the connection between the rotating shaft 11 and the heat exchange chamber 3. A controller 14 is provided on the left side of the outer wall of the base 1. The angle sensor 13 is connected to the controller 14 through a signal line.

[0053] The baffle 12 consists of two pieces, which are arranged in a 180° coplanar manner. Wind-side differential pressure sensors 37 are installed on both the left and right sides of the inner wall of the heat exchange chamber 3. The wind-side differential pressure sensors 37 are connected to the controller 14 through signal lines.

[0054] The heat exchange chamber 3 has flow guide grooves 38 on the lower front and rear sides of the inner wall of the heat exchange chamber 3. The flow guide grooves 38 are connected to the ash discharge port 22. The flow guide hood 39 is provided on the front side of the outer wall of the ash discharge port 22. The ash accumulation monitoring photoelectric sensor 40 is provided on the rear side of the outer wall of the ash discharge port 22. The ash accumulation monitoring photoelectric sensor 40 is connected to the controller 14 through a signal line.

[0055] Furthermore, during equipment operation, the motor 15 rotates the shaft 11. The rotation angle of the shaft 11 is collected in real time by the angle sensor 13 and transmitted to the controller 14. The controller 14 determines the current working status of the equipment based on the rotation angle of the shaft 11 and compares it with the target working status to ensure that the air intake status of the heat exchange chamber 3 is correct. If the shaft 11 is stuck or the angle is off, the controller 14 notifies the staff to carry out maintenance. When the heat exchange chamber 3 is in a unidirectional air intake state, the air-side differential pressure sensor 37 can detect the air intake pressure difference of the finned tube cluster 8 on the air intake side and the air outlet pressure difference on the air outlet side in real time, and upload the differential pressure data to the controller. When the differential pressure continues to rise to the set upper limit, the controller 14 determines that the ash accumulation in the finned tube cluster 8 has affected the heat exchange efficiency. It automatically sends a reversing command to the motor 15 to switch the air inlet direction of the heat exchange chamber 3 and perform reverse blowing on the ash accumulation side. The ash accumulation monitoring photoelectric sensor 40 monitors the ash passage and particulate matter concentration of the corresponding ash discharge port 22 in real time and uploads the data to the controller 14. The controller 14 indirectly judges the ash removal effect of the reverse blowing by the ash discharge volume. If the ash discharge volume is abnormally low, it can be determined that the fins are ash-accumulated and solidified, the air duct is blocked, or the blowing has failed. The controller 14 notifies the staff to carry out maintenance to avoid equipment damage that cannot be repaired in time, causing the heat exchange of the data center to fail.

[0056] Working principle: After the operator issues an operating command through the controller 14, the compressor 16 compresses the refrigerant and sends it to the oil separator 17 to complete oil-gas separation. The gaseous refrigerant enters the reversing valve group 21. The motor 15 drives the rotating shaft 11 to rotate, causing the baffle 12 to rotate synchronously, switching the air intake state of the heat exchange chamber 3. The rotating shaft 11 drives the reversing valve group 21 to synchronously switch the refrigerant passage. In unidirectional air intake, only the finned tube cluster 8 on the air intake side conducts refrigerant, and the idle side forms a reverse airflow to blow away accumulated dust. In bidirectional air intake, the finned tube cluster 8... All tube bundles 8 are connected to refrigerant to enhance the heat exchange effect of heat exchange chamber 3. In order to avoid the simultaneous closure of both sides of finned tube bundles 8 during the rotation of baffle 12, finned tube bundles 8 are set on part of baffle 14 and baffle 25, rather than covering baffle 14 and baffle 25 as a whole. After the refrigerant is condensed and liquefied in finned tube bundles 8, it flows out from liquid outlet pipe 10. After the refrigerant is throttled, it enters evaporator 20 to exchange heat with chilled water. The vaporized refrigerant returns to compressor 16 to complete the cycle. The water inlet 41 and water outlet 42 on both sides of base 1 realize the external transfer of cold energy.

[0057] The dust blown down by the reverse airflow falls into the bottom guide groove 38 of the heat exchange chamber 3. Under the action of gravity, the dust enters the dust discharge port 22 on the idle side. The rotating shaft 11 drives the rotating shaft 24 to rotate, causing the baffle 23 on the idle side to open and the baffle 23 on the air inlet side to close. The dust is discharged from the dust discharge port 22 on the idle side. When the heat exchange chamber 3 is inlet air in both directions, the baffle 23 on the front and rear sides of the base 1 simultaneously closes the dust discharge port 22.

[0058] When the heat exchange chamber 3 is in a unidirectional air intake state, the rotating shaft 11 rotates, and the connecting rod 27 synchronously drives the rotating shaft 26 to rotate, so that the guide louvers 25 deflect at a small angle to sort the airflow and reduce wind resistance. When the heat exchange chamber 3 is in a bidirectional air intake state, the guide louvers 25 deflect at a large angle under the drive of the rotating shaft 11.

[0059] Meanwhile, when motor 2 31 drives fan 30 to work, baffle 3 35 on the air inlet side is connected to heat exchange chamber 3 and air guide shroud 32 by eccentric wheel 36. A portion of the air entering from air inlet 6 is introduced into air guide shroud 32 to blow air and exchange heat on motor 2 31, so as to avoid motor 2 31 from getting too hot.

[0060] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-reliability air-cooled screw chiller unit for data centers, characterized in that: Includes a base (1), a main unit cavity (2) is provided on the upper side of the outer wall of the base (1), a heat exchange cavity (3) is provided on the upper side of the outer wall of the main unit cavity (2), a partition plate one (4) and a partition plate two (5) are provided in the middle of the inner wall of the heat exchange cavity (3), the partition plate two (5) is located on the rear side of the outer wall of the partition plate one (4), air inlets (6) are provided through the front and rear sides of the outer wall of the heat exchange cavity (3), a protective net (7) is provided at the connection between the air inlet (6) and the heat exchange cavity (3), and finned tube clusters are embedded in the outer walls of the partition plate one (4) and the partition plate two (5). 8) An air inlet pipe (9) is provided on the upper side of the outer wall of the finned tube cluster (8), and a liquid outlet pipe (10) is provided on the lower side of the outer wall of the finned tube cluster (8). A rotating shaft (11) is provided through the middle of the inner wall of the heat exchange chamber (3). A baffle (12) is provided on the outer wall of the rotating shaft (11). An angle sensor (13) is provided at the connection between the rotating shaft (11) and the heat exchange chamber (3). A controller (14) is provided on the left side of the outer wall of the base (1). The angle sensor (13) is connected to the controller (14) through a signal line.

2. The high-reliability air-cooled screw chiller unit for data centers according to claim 1, characterized in that: A motor (15) is installed in the middle of the inner wall of the main unit cavity (2). The output end of the motor (15) is connected to the rotating shaft (11). A compressor (16) is installed on the left side of the inner wall of the main unit cavity (2). An oil separator (17) is installed on the right side of the inner wall of the main unit cavity (2). The compressor (16) is connected to the oil separator (17) through a connecting pipe. An oil filter (18) and an oil cooler (19) are connected in sequence on the rear side of the outer wall of the oil separator (17). The oil separator (17) is connected to the compressor (16) via a connecting pipe. An evaporator (20) is installed on the right side of the outer wall of the oil separator (17). A reversing valve assembly (21) is installed on the upper side of the inner wall of the main unit cavity (2). The reversing valve assembly (21) is connected to the rotating shaft (11) via a bevel gear pair. The inlet end of the reversing valve assembly (21) is connected to the outlet end of the oil separator (17). The outlet end of the reversing valve assembly (21) is connected to the inlet pipe (9). The return port of the reversing valve assembly (21) is connected to the outlet pipe (10).

3. The high-reliability air-cooled screw chiller unit for data centers according to claim 1, characterized in that: The base (1) has ash discharge ports (22) on both the front and rear sides of its outer wall. A baffle (23) is provided at the connection between the ash discharge port (22) and the base (1). The baffle (23) is connected to the base (1) through a rotating shaft (24). The rotating shaft (24) is connected to the rotating shaft (11) through a transmission assembly.

4. The high-reliability air-cooled screw chiller unit for data centers according to claim 1, characterized in that: The front side of the outer wall of partition 1 (4) and the rear side of the outer wall of partition 2 (5) are each provided with 6-8 sets of guide louvers (25) at equal intervals. The guide louvers (25) are all connected to the heat exchange chamber (3) through the rotating shaft 3 (26). The rotating shaft 3 (26) is connected to each other through the connecting rod (27). The connecting rod (27) is connected to the rotating shaft 1 (11) through the transmission assembly. A limit block (28) is provided at the connection between the rotating shaft 3 (26) and the heat exchange chamber (3).

5. The high-reliability air-cooled screw chiller unit for data centers according to claim 2, characterized in that: A cooling chamber (29) is provided on the upper side of the outer wall of the heat exchange chamber (3). A fan (30) is provided on the upper side of the inner wall of the cooling chamber (29). A motor (31) is provided on the upper side of the outer wall of the fan (30). The output end of the fan (30) is connected to the output end of the motor (31). A guide hood (32) is fitted on the outer wall of the motor (31). A vent (33) is provided through the upper side of the inner wall of the heat exchange chamber (3). A guide pipe (34) is provided through the heat exchange chamber (3) on the front side of the outer wall of the partition (4) and the rear side of the outer wall of the partition (5). The two ends of the guide pipe (34) are connected to the heat exchange chamber (3) and the guide hood (32) respectively. A baffle (35) is provided at the connection between the guide pipe (34) and the heat exchange chamber (3). The baffle (35) is connected to the rotating shaft (11) through the eccentric wheel (36). The motor (31) is connected to the controller (14) through the signal line.

6. The high-reliability air-cooled screw chiller unit for data centers according to claim 1, characterized in that: The baffle (12) consists of two pieces arranged in a 180° coplanar manner. Wind-side differential pressure sensors (37) are installed on both the left and right sides of the inner wall of the heat exchange chamber (3). The wind-side differential pressure sensors (37) are connected to the controller (14) via signal lines.

7. The high-reliability air-cooled screw chiller unit for data centers according to claim 3, characterized in that: The heat exchange chamber (3) has a flow guide groove (38) on the lower part of the front and rear sides of the inner wall. The flow guide groove (38) is connected to the ash discharge port (22). The ash discharge port (22) has a flow guide hood (39) on the front side of the outer wall and an ash accumulation monitoring photoelectric sensor (40) on the rear side of the outer wall. The ash accumulation monitoring photoelectric sensor (40) is connected to the controller (14) through a signal line.

8. The high-reliability air-cooled screw chiller unit for data centers according to claim 2, characterized in that: The base (1) has an inlet (41) and an outlet (42) on the left and right sides of its outer wall, respectively. The inlet (41) and outlet (42) are connected to the inlet and outlet of the evaporator (20) through connecting pipes, respectively. The liquid inlet of the evaporator (20) is connected to the reversing valve group (21), and the gas return port of the evaporator (20) is connected to the compressor (16).

9. The high-reliability air-cooled screw chiller unit for data centers according to claim 5, characterized in that: A sealing ring (43) is provided at the connection between the rotating shaft (11) and the main unit cavity (2), the heat exchange cavity (3), the reversing valve group (21) and the cooling cavity (29).

10. The high-reliability air-cooled screw chiller unit for data centers according to claim 2, characterized in that: The lower side of the outer wall of the outlet pipe (10) is provided with a recovery port (44), which is connected to the compressor (16) through a connecting pipe.

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