Air conditioning system

Abstract

The present invention provides an air-conditioning system. The air-conditioning system includes: a first refrigeration circuit, including a compressor, a first condenser and a heat exchanger, the first condenser is connected to the compressor, and the heat exchanger is connected to the compressor; a second refrigeration circuit, including a first evaporator and a first pipeline, the first evaporator is connected to the heat exchanger through the first pipeline; a third refrigeration circuit, including a second condenser, a second evaporator and a second pipeline, the second evaporator is connected to the second condenser through the second pipeline; an emergency module, including a third pipeline and a control structure arranged on the third pipeline; the emergency module is arranged on the first pipeline, and when the control structure is in an open state, the refrigerant is discharged through the third pipeline; and / or, the emergency module is arranged on the second pipeline, and when the control structure is in an open state, the refrigerant flows out through the third pipeline. The present invention solves the problem that the air-conditioning system in the prior art shuts down within a short time, resulting in the data center being unable to work properly.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration in data center computer rooms, and more particularly, to an air conditioning system. Background Art

[0002] In the prior art, as a special place that needs to provide refrigeration conditions all year round, when the air conditioning system in the data center computer room suddenly stops working due to objective reasons (such as sudden power outage), the entire data center computer room is prone to short-term local high temperatures. Especially for data computer rooms with a large heat flux density, the temperature will rise rapidly, easily causing related equipment to stop working due to excessive temperature rise, and even causing equipment damage. Summary of the Invention

[0003] The main object of the present invention is to provide an air conditioning system to solve the problem in the prior art that the data center cannot work properly or even cause equipment damage due to the short-term shutdown of the air conditioning system.

[0004] To achieve the above object, the present invention provides an air conditioning system, including: a first refrigeration circuit, including a compressor, a first condenser and a heat exchanger, the first condenser is connected to the exhaust port of the compressor, and the heat exchanger is connected to the suction port of the compressor; a second refrigeration circuit, located indoors, the second refrigeration circuit includes a first evaporator and a first pipeline, one end of the first evaporator is connected to the heat exchanger through the first pipeline; a third refrigeration circuit, including a second condenser, a second evaporator and a second pipeline, the second condenser is located outdoors, the second evaporator is located indoors, and one end of the second evaporator is connected to the second condenser through the second pipeline; an emergency module, including a third pipeline and a control structure provided on the third pipeline; wherein, the emergency module is provided on the first pipeline, when the control structure is in the open state, the refrigerant is discharged through the third pipeline to reduce the pressure of the refrigerant in the second refrigeration circuit; and / or, the emergency module is provided on the second pipeline, when the control structure is in the open state, the refrigerant flows out through the third pipeline to reduce the pressure of the refrigerant in the third refrigeration circuit.

[0005] Applying the technical solution of the present invention, when a fault occurs in the power supply system of the air conditioning system, the first refrigeration circuit cannot operate normally because the compressor cannot start. At this time, the staff can turn on the control structure of the emergency module so that the refrigerant enters the third pipeline through the first pipeline and is discharged from the third pipeline; and / or so that the refrigerant enters the third pipeline through the second pipeline and is discharged from the third pipeline. In this way, when the refrigerant amount in the second refrigeration circuit and / or the third refrigeration circuit decreases, the refrigerant pressure in the refrigeration circuit decreases, thereby reducing the evaporation temperature and boiling point of the refrigerant, so that the refrigerant can quickly evaporate in the first evaporator and / or the second evaporator for cooling the data center computer room, thus solving the problem in the prior art that the data center cannot work normally or even cause equipment damage due to the short-term shutdown of the air conditioning system, realizing the uninterrupted refrigeration of the air conditioning system for the data center computer room, and ensuring that the data center can work normally.

[0006] Furthermore, the emergency module further includes: a buffer structure, which is connected to the third pipeline for storing the refrigerant discharged from the third pipeline. The refrigerant discharged from the third pipeline can be buffered in the buffer structure, thereby avoiding the waste of the refrigerant caused by flowing out of the air conditioning system. At the same time, the refrigerant buffered in the buffer structure can enter the second refrigeration circuit and the third refrigeration circuit again to achieve the refrigeration purpose of the air conditioning system for the data center computer room.

[0007] Furthermore, there are multiple emergency modules, and the multiple emergency modules include a first emergency module and a second emergency module. The first emergency module is arranged on the first pipeline, and the second emergency module is arranged on the second pipeline; the air conditioning system includes a battery module, and the battery module is connected to both the first emergency module and the second emergency module. There are two emergency modules, and the two emergency modules include a first emergency module and a second emergency module. The first emergency module is arranged in the second refrigeration circuit, and the second emergency module is arranged in the third refrigeration circuit. The staff can perform emergency treatment on the second refrigeration circuit and the third refrigeration circuit through the first emergency module and the second emergency module respectively to meet different usage requirements and working conditions. At the same time, the battery module is used to supply power to the first emergency module and the second emergency module to ensure the normal use of the first emergency module and the second emergency module, improving the operation reliability of the emergency module.

[0008] Further, the control structure is a control valve, and the first emergency module further includes: a fourth pipeline, one end of the fourth pipeline is communicated with the first pipeline, and the other end of the fourth pipeline is communicated with the buffer structure of the first emergency module; a first pump body, the first pump body is arranged on the fourth pipeline to pump the refrigerant in the first pipeline into the buffer structure. The refrigerant in the second refrigeration circuit can not only enter the buffer structure through the control valve via the third pipeline, but also enter the buffer structure via the fourth pipeline under the pumping of the first pump body, so as to rapidly reduce the pressure of the refrigerant in the second refrigeration circuit, thereby improving the refrigeration efficiency of the air conditioning system.

[0009] Further, the buffer structure of the first emergency module has a first inlet and a first outlet, the third pipeline and / or the fourth pipeline is communicated with the first inlet, and the first emergency module further includes: a fifth pipeline, one end of the fifth pipeline is communicated with the first pipeline, and the other end of the fifth pipeline is communicated with the first outlet; a second pump body, the second pump body is arranged on the fifth pipeline to pump the refrigerant entering the first outlet into the first pipeline. The first pump body is used to pump the refrigerant in the first pipeline into the buffer structure, and the second pump body is used to pump the refrigerant in the buffer structure back into the first pipeline via the fifth pipeline. When the power supply system of the air conditioning system returns to normal, the above settings ensure that there is sufficient refrigerant in the second refrigeration circuit, improving the refrigeration reliability of the air conditioning system.

[0010] Further, the control structure is a control valve, and the second emergency module further includes: a sixth pipeline, one end of the sixth pipeline is communicated with the second pipeline, and the other end of the sixth pipeline is communicated with the buffer structure of the second emergency module; a third pump body, the third pump body is arranged on the sixth pipeline to pump the refrigerant in the second pipeline into the buffer structure. The refrigerant in the third refrigeration circuit can not only enter the buffer structure through the control valve via the third pipeline, but also enter the buffer structure via the sixth pipeline under the pumping of the third pump body, so as to rapidly reduce the pressure of the refrigerant in the third refrigeration circuit, thereby improving the refrigeration efficiency of the air conditioning system.

[0011] Further, the buffer structure of the second emergency module has a second inlet and a second outlet, the third pipeline and / or the sixth pipeline is communicated with the second inlet, and the second emergency module further includes: a seventh pipeline, one end of the seventh pipeline is communicated with the second pipeline, and the other end of the seventh pipeline is communicated with the second outlet; a fourth pump body, the fourth pump body is arranged on the seventh pipeline to pump the refrigerant entering the second outlet into the second pipeline. The third pump body is used to pump the refrigerant in the second pipeline into the buffer structure, and the fourth pump body is used to pump the refrigerant in the buffer structure back into the second pipeline via the seventh pipeline. When the power supply system of the air conditioning system returns to normal, the above settings ensure that there is sufficient refrigerant in the third refrigeration circuit, improving the refrigeration reliability of the air conditioning system.

[0012] Further, the second refrigeration circuit further includes: an eighth pipeline, the other end of the first evaporator is connected to the heat exchanger through the eighth pipeline; a first liquid reservoir, disposed on the first pipeline; wherein, the height of the heat exchanger is higher than the height of the first liquid reservoir; the first emergency module is communicated with the first liquid reservoir. The above settings improve the flow stability of the refrigerant in the second refrigeration circuit on the one hand, ensuring that the second refrigeration circuit can cool the data center computer room; on the other hand, enabling the refrigerant in the second refrigeration circuit to flow under its own weight without power equipment, thereby reducing the energy consumption of the air conditioning system.

[0013] Further, there is one first evaporator, and the height of the first liquid reservoir is higher than the height of the first evaporator; or, there are multiple first evaporators, and the multiple first evaporators are arranged at intervals along the height direction and / or the length direction of the air conditioning system, and the height of the first liquid reservoir is higher than the first evaporator at the highest position among the multiple first evaporators. The above settings make the number and installation position of the first evaporator more flexible to meet different usage requirements and working conditions.

[0014] Further, the third refrigeration circuit further includes: a ninth pipeline, the other end of the second evaporator is connected to the second condenser through the ninth pipeline; a second liquid reservoir, disposed on the second pipeline; wherein, the height of the second condenser is higher than the height of the second liquid reservoir; the second emergency module is communicated with the second liquid reservoir. The above settings improve the flow stability of the refrigerant in the third refrigeration circuit on the one hand, ensuring that the third refrigeration circuit can cool the data center computer room; on the other hand, enabling the refrigerant in the third refrigeration circuit to flow under its own weight without power equipment, thereby reducing the energy consumption of the air conditioning system.

[0015] Further, there is one second evaporator, and the height of the second liquid reservoir is higher than the height of the second evaporator; or, there are multiple second evaporators, and the multiple second evaporators are arranged at intervals along the height direction and / or the length direction of the air conditioning system, and the height of the second liquid reservoir is higher than the second evaporator at the highest position among the multiple second evaporators. The above settings make the number and installation position of the second evaporator more flexible to meet different usage requirements and working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0017] Figure 1 shows a schematic structural diagram of an embodiment of an air conditioning system according to the present invention;

[0018] Figure 2 shows Figure 1Schematic diagram of the first emergency module of the air conditioning system in; and

[0019] Figure 3 Shows Figure 1 Schematic diagram of the second emergency module of the air conditioning system in.

[0020] Wherein, the above-mentioned drawings include the following reference numerals:

[0021] 10. First refrigeration circuit; 11. Compressor; 12. First condenser; 13. Heat exchanger; 14. Third liquid storage device; 15. Throttling device; 20. Second refrigeration circuit; 21. First evaporator; 22. First pipeline; 23. Eighth pipeline; 24. First liquid storage device; 30. Third refrigeration circuit; 31. Second condenser; 32. Second evaporator; 33. Second pipeline; 34. Ninth pipeline; 35. Second liquid storage device; 40. Emergency module; 41. Third pipeline; 42. Control structure; 43. Buffer structure; 44. First emergency module; 441. Fourth pipeline; 442. First pump body; 443. Fifth pipeline; 444. Second pump body; 45. Second emergency module; 451. Sixth pipeline; 452. Third pump body; 453. Seventh pipeline; 454. Fourth pump body. Detailed implementation manners

[0022] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0023] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0024] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower" are usually in the direction shown in the drawings, or in the vertical, perpendicular or gravitational direction; similarly, for the convenience of understanding and description, "left, right" are usually in the left and right shown in the drawings; "inside, outside" refer to the inside and outside relative to the contour of each component itself, but the above orientation terms do not limit the present invention.

[0025] In order to solve the problem that in the prior art, due to the short-term shutdown of the air conditioning system, the data center cannot work properly or even cause equipment damage, the present application provides an air conditioning system.

[0026] Such as Figures 1 to 3As shown in the figure, the air conditioning system includes a first refrigeration circuit 10, a second refrigeration circuit 20, a third refrigeration circuit 30 and an emergency module 40. The first refrigeration circuit 10 includes a compressor 11, a first condenser 12 and a heat exchanger 13. The first condenser 12 is connected to the exhaust port of the compressor 11, and the heat exchanger 13 is connected to the suction port of the compressor 11. The second refrigeration circuit 20 is located indoors and includes a first evaporator 21 and a first pipeline 22. One end of the first evaporator 21 is connected to the heat exchanger 13 through the first pipeline 22. The third refrigeration circuit 30 includes a second condenser 31, a second evaporator 32 and a second pipeline 33. The second condenser 31 is located outdoors, and the second evaporator 32 is located indoors. One end of the second evaporator 32 is connected to the second condenser 31 through the second pipeline 33. The emergency module 40 includes a third pipeline 41 and a control structure 42 provided on the third pipeline 41. Among them, the emergency module 40 is provided on the first pipeline 22. When the control structure 42 is in the open state, the refrigerant is discharged through the third pipeline 41 to reduce the pressure of the refrigerant in the second refrigeration circuit 20. And, the emergency module 40 is also provided on the second pipeline 33. When the control structure 42 is in the open state, the refrigerant flows out through the third pipeline 41 to reduce the pressure of the refrigerant in the third refrigeration circuit 30.

[0027] Applying the technical solution of the present invention, when a failure occurs in the power supply system of the air conditioning system, the first refrigeration circuit 10 cannot operate normally because the compressor 11 cannot start. At this time, the staff can turn on the control structure 42 of the emergency module 40 so that the refrigerant enters the third pipeline 41 through the first pipeline 22 and is discharged from the third pipeline 41. At the same time, the refrigerant can also enter the third pipeline 41 through the second pipeline 33 and be discharged from the third pipeline 41. In this way, when the refrigerant amount in the second refrigeration circuit 20 and the third refrigeration circuit 30 decreases, the refrigerant pressure in the refrigeration circuit decreases, and then the evaporation temperature and boiling point of the refrigerant are reduced, so that the refrigerant can quickly evaporate in the first evaporator 21 and the second evaporator 32 for cooling the data center computer room, thus solving the problem in the prior art that the data center cannot work normally or even cause equipment damage due to the short-term shutdown of the air conditioning system, realizing the uninterrupted refrigeration of the air conditioning system for the data center computer room and ensuring that the data center can work normally.

[0028] In this embodiment, the emergency module is provided on the second refrigeration circuit 20 and the third refrigeration circuit 30. The second refrigeration circuit 20 and the third refrigeration circuit 30 can cool the data center computer room simultaneously, thereby improving the refrigeration efficiency of the air conditioning system. It should be noted that the installation position of the emergency module is not limited to this. In other embodiments not shown in the drawings, the emergency module includes a third pipeline and a control structure provided on the third pipeline. The emergency module is provided on the first pipeline. When the control structure is in the open state, the refrigerant is discharged through the third pipeline to reduce the pressure of the refrigerant in the second refrigeration circuit. Specifically, when a fault occurs in the power supply system of the air conditioning system, the first refrigeration circuit cannot operate normally because the compressor cannot start. At this time, the staff can turn on the control structure of the emergency module so that the refrigerant enters the third pipeline through the first pipeline and is discharged from the third pipeline. In this way, when the refrigerant amount in the second refrigeration circuit decreases, the refrigerant pressure in the refrigeration circuit decreases, thereby reducing the evaporation temperature and boiling point of the refrigerant, enabling the refrigerant to evaporate quickly in the first evaporator for cooling the data center computer room, and thus solving the problem in the prior art that the data center cannot work properly or even causes equipment damage due to the short-term shutdown of the air conditioning system, achieving uninterrupted refrigeration of the air conditioning system for the data center computer room and ensuring that the data center can work properly.

[0029] In other embodiments not shown in the drawings, the emergency module includes a third pipeline and a control structure provided on the third pipeline. The emergency module is provided on the second pipeline. When the control structure is in the open state, the refrigerant flows out through the third pipeline to reduce the pressure of the refrigerant in the third refrigeration circuit. Specifically, when a fault occurs in the power supply system of the air conditioning system, the first refrigeration circuit cannot operate normally because the compressor cannot start. At this time, the staff can turn on the control structure of the emergency module so that the refrigerant enters the third pipeline through the second pipeline and is discharged from the third pipeline. In this way, when the refrigerant amount in the third refrigeration circuit decreases, the refrigerant pressure in the refrigeration circuit decreases, thereby reducing the evaporation temperature and boiling point of the refrigerant, enabling the refrigerant to evaporate quickly in the second evaporator for cooling the data center computer room, and thus solving the problem in the prior art that the data center cannot work properly or even causes equipment damage due to the short-term shutdown of the air conditioning system, achieving uninterrupted refrigeration of the air conditioning system for the data center computer room and ensuring that the data center can work properly.

[0030] As Figure 2 and Figure 3As shown, the emergency module 40 further includes a cache structure 43. Among them, the cache structure 43 is connected to the third pipeline 41 for storing the refrigerant discharged from the third pipeline 41. In this way, the refrigerant discharged from the third pipeline 41 can be cached in the cache structure 43, thereby avoiding the waste of refrigerant caused by the refrigerant flowing outside the air-conditioning system. At the same time, the refrigerant cached in the cache structure 43 can enter the second refrigeration circuit 20 and the third refrigeration circuit 30 again to achieve the refrigeration purpose of the air-conditioning system for the data center computer room.

[0031] Optionally, there are multiple emergency modules 40. The multiple emergency modules 40 include a first emergency module 44 and a second emergency module 45. The first emergency module 44 is arranged on the first pipeline 22, and the second emergency module 45 is arranged on the second pipeline 33. The air-conditioning system includes a battery module, and the battery module is connected to both the first emergency module 44 and the second emergency module 45. In this embodiment, there are two emergency modules 40. The two emergency modules 40 include a first emergency module 44 and a second emergency module 45. The first emergency module 44 is arranged in the second refrigeration circuit 20, and the second emergency module 45 is arranged in the third refrigeration circuit 30. The staff can perform emergency processing on the second refrigeration circuit 20 and the third refrigeration circuit 30 through the first emergency module 44 and the second emergency module 45 respectively to meet different usage requirements and working conditions. At the same time, the battery module is used to supply power to the first emergency module 44 and the second emergency module 45 to ensure that the first emergency module 44 and the second emergency module 45 can be used normally, improving the operation reliability of the emergency module 40.

[0032] Specifically, when the outdoor temperature is lower than the indoor temperature and the power supply system of the air-conditioning system fails, the staff can only operate the second emergency module 45 and make the control structure 42 in the open state, so that the refrigerant in the third refrigeration circuit 30 enters the third pipeline 41 through the second pipeline 33 and is cached in the cache structure 43, thereby reducing the refrigerant amount in the third refrigeration circuit 30, reducing the refrigerant pressure in the third refrigeration circuit 30, further reducing the evaporation temperature and boiling point of the refrigerant, so that the refrigerant can quickly evaporate in the second evaporator 32 for cooling the data center computer room. Or, the staff can operate the first emergency module 44 and the second emergency module 45 simultaneously, so that the control structures 42 of the first emergency module 44 and the second emergency module 45 are both in the open state, thereby improving the refrigeration efficiency of the air-conditioning system.

[0033] When the outdoor temperature is higher than the indoor temperature and the power supply system of the air conditioning system fails, the staff can only operate the first emergency module 44 and keep the control structure 42 in the open state, so that the refrigerant in the second refrigeration circuit 20 enters the third pipeline 41 through the first pipeline 22 and is buffered in the buffer structure 43, thereby reducing the amount of refrigerant in the second refrigeration circuit 20, reducing the refrigerant pressure in the second refrigeration circuit 20, and then reducing the evaporation temperature and boiling point of the refrigerant, so that the refrigerant can quickly evaporate in the first evaporator 21 for cooling the data center computer room.

[0034] As Figure 2 shown, the control structure 42 is a control valve, and the first emergency module 44 further includes a fourth pipeline 441 and a first pump body 442. Wherein, one end of the fourth pipeline 441 is communicated with the first pipeline 22, and the other end of the fourth pipeline 441 is communicated with the buffer structure 43 of the first emergency module 44. The first pump body 442 is arranged on the fourth pipeline 441 to pump the refrigerant in the first pipeline 22 into the buffer structure 43. In this way, the refrigerant located in the second refrigeration circuit 20 can not only enter the buffer structure 43 through the control valve via the third pipeline 41, but also enter the buffer structure 43 through the fourth pipeline 441 under the pumping of the first pump body 442, so as to quickly reduce the refrigerant pressure in the second refrigeration circuit 20 and improve the refrigeration efficiency of the air conditioning system.

[0035] In this embodiment, the control valve and the first pump body 442 can be started simultaneously; or, only the control valve is started; or, only the first pump body 442 is started, so as to make the discharge of the refrigerant in the second refrigeration circuit 20 more diverse to meet different operating conditions. Specifically, when the power supply system of the air conditioning system fails, the staff first controls the control valve to be in the open state. When the pressure difference between the two sides of the control valve decreases and the refrigerant pressure on the indoor side increases, and the evaporation speed of the refrigerant is not enough to provide sufficient cooling capacity, the first pump body 442 is started and the control valve is closed at the same time, so as to accelerate the refrigerant discharge speed and maintain the evaporation speed of the liquid refrigerant in the first evaporator 21 to provide sufficient cooling capacity for the data center computer room. Among them, since the control valve and the first pump body 442 require less power, only battery power supply is needed.

[0036] Optionally, the control valve is a two-way valve.

[0037] Optionally, the buffer structure 43 of the first emergency module 44 has a first inlet and a first outlet. The third pipeline 41 and / or the fourth pipeline 441 communicate with the first inlet. The first emergency module 44 further includes a fifth pipeline 443 and a second pump body 444. One end of the fifth pipeline 443 communicates with the first pipeline 22, and the other end of the fifth pipeline 443 communicates with the first outlet. The second pump body 444 is arranged on the fifth pipeline 443 to pump the refrigerant entering the first outlet into the first pipeline 22. In this way, the first pump body 442 is used to pump the refrigerant in the first pipeline 22 into the buffer structure 43, and the second pump body 444 is used to pump the refrigerant in the buffer structure 43 back into the first pipeline 22 via the fifth pipeline 443. When the power supply system of the air conditioning system returns to normal, the above settings ensure that there is sufficient refrigerant in the second refrigeration circuit 20, improving the refrigeration reliability of the air conditioning system.

[0038] In this embodiment, both the third pipeline 41 and the fourth pipeline 441 communicate with the first inlet to transport the refrigerant into the buffer structure 43.

[0039] As Figure 3 shown, the control structure 42 is a control valve. The second emergency module 45 further includes a sixth pipeline 451 and a third pump body 452. One end of the sixth pipeline 451 communicates with the second pipeline 33, and the other end of the sixth pipeline 451 communicates with the buffer structure 43 of the second emergency module 45. The third pump body 452 is arranged on the sixth pipeline 451 to pump the refrigerant in the first pipeline 22 into the buffer structure 43. In this way, the refrigerant in the third refrigeration circuit 30 can not only enter the buffer structure 43 through the control valve via the third pipeline 41, but also enter the buffer structure 43 under the pumping of the third pump body 452 via the sixth pipeline 451, so as to quickly reduce the pressure of the refrigerant in the third refrigeration circuit 30, thereby improving the refrigeration efficiency of the air conditioning system.

[0040] In this embodiment, the control valve and the third pump body 452 can be started simultaneously; or, only the control valve is started; or, only the third pump body 452 is started, so that the discharge of the refrigerant in the third refrigeration circuit 30 is more diverse to meet different operating conditions. Specifically, when a fault occurs in the power supply system of the air conditioning system, the staff first controls the control valve to be in the open state. When the pressure difference between the two sides of the control valve decreases and the refrigerant pressure on the indoor side rises, and the evaporation rate of the refrigerant is insufficient to provide enough cooling capacity, the third pump body 452 is started and the control valve is closed at the same time, so as to accelerate the refrigerant discharge speed and maintain the evaporation rate of the liquid refrigerant in the second evaporator 32 to provide enough cooling capacity for the data center computer room. Among them, since the power required by the control valve and the third pump body 452 is small, only battery power supply is needed.

[0041] Optionally, the buffer structure 43 of the second emergency module 45 has a second inlet and a second outlet. The third pipeline 41 and / or the sixth pipeline 451 are connected to the second inlet. The second emergency module 45 further includes a seventh pipeline 453 and a fourth pump body 454. One end of the seventh pipeline 453 is connected to the second pipeline 33, and the other end of the seventh pipeline 453 is connected to the second outlet. The fourth pump body 454 is disposed on the seventh pipeline 453 to pump the refrigerant entering the second outlet into the second pipeline 33. In this way, the third pump body 452 is used to pump the refrigerant in the second pipeline 33 into the buffer structure 43, and the fourth pump body 454 is used to pump the refrigerant in the buffer structure 43 back into the second pipeline 33 via the seventh pipeline 453. When the power supply system of the air conditioning system returns to normal, the above settings ensure that there is sufficient refrigerant in the third refrigeration circuit 30, improving the refrigeration reliability of the air conditioning system.

[0042] In this embodiment, both the third pipeline 41 and the sixth pipeline 451 are connected to the second inlet to transport the refrigerant into the buffer structure 43.

[0043] As Figure 1 shown, the second refrigeration circuit 20 further includes an eighth pipeline 23 and a first liquid storage device 24. The other end of the first evaporator 21 is connected to the heat exchanger 13 through the eighth pipeline 23. The first liquid storage device 24 is disposed on the first pipeline 22. Among them, the height of the heat exchanger 13 is higher than the height of the first liquid storage device 24. The first emergency module 44 is connected to the first liquid storage device 24. In this way, the above settings improve the flow stability of the refrigerant in the second refrigeration circuit 20 on the one hand, ensuring that the second refrigeration circuit 20 can cool the data center computer room; on the other hand, enabling the refrigerant in the second refrigeration circuit 20 to flow under its own weight without power equipment, thereby reducing the energy consumption of the air conditioning system.

[0044] Optionally, there is one first evaporator 21, and the height of the first liquid storage device 24 is higher than the height of the first evaporator 21; or, there are multiple first evaporators 21, and the multiple first evaporators 21 are arranged at intervals in the height direction and / or the length direction of the air conditioning system, and the height of the first liquid storage device 24 is higher than the first evaporator 21 at the highest position among the multiple first evaporators 21. In this way, the above settings make the number and installation position of the first evaporators 21 more flexible to meet different usage requirements and working conditions.

[0045] In this embodiment, there are two first evaporators 21, and the two first evaporators 21 are arranged at intervals in the height direction of the air conditioning system to cool the data centers at different height positions in the data center computer room.

[0046] It should be noted that the number of the first evaporators 21 is not limited to this, and can be adjusted according to the working conditions and usage requirements. Optionally, the number of the first evaporators 21 is three, or four, or five, or more.

[0047] As Figure 1 shown, the third refrigeration circuit 30 further includes a ninth pipeline 34 and a second liquid reservoir 35. The other end of the second evaporator 32 is connected to the second condenser 31 through the ninth pipeline 34. The second liquid reservoir 35 is arranged on the second pipeline 33. Among them, the height of the second condenser 31 is higher than the height of the second liquid reservoir 35. The second emergency module 45 is communicated with the second liquid reservoir 35. In this way, on the one hand, the above setting improves the flow stability of the refrigerant in the third refrigeration circuit 30, ensuring that the third refrigeration circuit 30 can play a refrigeration role in the data center computer room; on the other hand, it enables the refrigerant in the third refrigeration circuit 30 to flow under its own weight without a power device, thereby reducing the energy consumption of the air conditioning system.

[0048] Optionally, the number of the second evaporators 32 is one, and the height of the second liquid reservoir 35 is higher than the height of the second evaporator 32; or, the number of the second evaporators 32 is multiple, and the multiple second evaporators 32 are arranged at intervals along the height direction and / or the length direction of the air conditioning system, and the height of the second liquid reservoir 35 is higher than the second evaporator 32 at the highest position among the multiple second evaporators 32. In this way, the above setting makes the number and installation position of the second evaporators 32 more flexible to meet different usage requirements and working conditions.

[0049] In this embodiment, the number of the second evaporators 32 is two, and the two second evaporators 32 are arranged at intervals along the height direction of the air conditioning system for refrigerating the data centers at different height positions in the data center computer room.

[0050] It should be noted that the number of the second evaporators 32 is not limited to this, and can be adjusted according to the working conditions and usage requirements. Optionally, the number of the second evaporators 32 is three, or four, or five, or more.

[0051] In this embodiment, the heat exchanger 13 is a shell-and-tube heat exchanger.

[0052] As Figure 1 shown, the first refrigeration circuit 10 further includes a third liquid reservoir 14 and a throttling device 15. The first condenser 12 and the second condenser 31 share a fan.

[0053] In this embodiment, when the outdoor temperature is low enough to meet the indoor cooling demand, the compressor 11 stops working and the third refrigeration circuit 30 is started to cool the interior. When the outdoor temperature rises or the indoor heat power is too large, the compressor 11 is started to cool the interior through the first refrigeration circuit 10. In this way, the above operation mode of the air conditioning system can effectively utilize the outdoor natural cold source in the day and night, transitional seasons and winter, and greatly reduce the operation energy consumption.

[0054] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0055] When a fault occurs in the power supply system of the air conditioning system, the first refrigeration circuit cannot operate normally because the compressor cannot be started. At this time, the staff can turn on the control structure of the emergency module to enable the refrigerant to enter the third pipeline through the first pipeline and be discharged from the third pipeline; and / or enable the refrigerant to enter the third pipeline through the second pipeline and be discharged from the third pipeline. In this way, when the refrigerant amount in the second refrigeration circuit and / or the third refrigeration circuit decreases, the refrigerant pressure in the refrigeration circuit decreases, thereby reducing the evaporation temperature and boiling point of the refrigerant, so that the refrigerant can quickly evaporate in the first evaporator and / or the second evaporator to cool the data center computer room, thus solving the problem in the prior art that the data center cannot work normally or even cause equipment damage due to the short-term shutdown of the air conditioning system, and realizing the uninterrupted refrigeration of the air conditioning system for the data center computer room to ensure the normal operation of the data center.

[0056] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0058] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0059] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An air conditioning system, characterized in that, Comprising: A first refrigeration circuit (10), including a compressor (11), a first condenser (12) and a heat exchanger (13), wherein the first condenser (12) is connected to the exhaust port of the compressor (11), and the heat exchanger (13) is connected to the suction port of the compressor (11); A second refrigeration circuit (20), located indoors, the second refrigeration circuit (20) including a first evaporator (21) and a first pipeline (22), one end of the first evaporator (21) being connected to the heat exchanger (13) through the first pipeline (22); A third refrigeration circuit (30), including a second condenser (31), a second evaporator (32) and a second pipeline (33), the second condenser (31) being located outdoors, the second evaporator (32) being located indoors, one end of the second evaporator (32) being connected to the second condenser (31) through the second pipeline (33); An emergency module (40), including a third pipeline (41) and a control structure (42) provided on the third pipeline (41); wherein, the emergency module (40) is provided on the first pipeline (22), and when the control structure (42) is in an open state, the refrigerant is discharged through the third pipeline (41) to reduce the pressure of the refrigerant in the second refrigeration circuit (20); and / or, the emergency module (40) is provided on the second pipeline (33), and when the control structure (42) is in an open state, the refrigerant flows out through the third pipeline (41) to reduce the pressure of the refrigerant in the third refrigeration circuit (30).

2. The air conditioning system according to claim 1, characterized in that, The emergency module (40) further includes: A buffer structure (43), the buffer structure (43) being connected to the third pipeline (41) for storing the refrigerant discharged from the third pipeline (41).

3. The air conditioning system according to claim 1, characterized in that, There are multiple emergency modules (40), the multiple emergency modules (40) including a first emergency module (44) and a second emergency module (45), the first emergency module (44) being provided on the first pipeline (22), the second emergency module (45) being provided on the second pipeline (33); the air conditioning system includes a battery module, and the battery module is connected to both the first emergency module (44) and the second emergency module (45).

4. The air conditioning system according to claim 3, characterized in that, The control structure (42) is a control valve, and the first emergency module (44) further includes: A fourth pipeline (441), one end of the fourth pipeline (441) being communicated with the first pipeline (22), and the other end of the fourth pipeline (441) being communicated with the buffer structure (43) of the first emergency module (44); A first pump body (442), the first pump body (442) being provided on the fourth pipeline (441) to pump the refrigerant in the first pipeline (22) into the buffer structure (43).

5. The air conditioning system according to claim 4, characterized in that, The buffer structure (43) of the first emergency module (44) has a first inlet and a first outlet. The third pipeline (41) and / or the fourth pipeline (441) communicate with the first inlet. The first emergency module (44) further includes: A fifth pipeline (443), one end of the fifth pipeline (443) communicates with the first pipeline (22), and the other end of the fifth pipeline (443) communicates with the first outlet; A second pump body (444), the second pump body (444) is arranged on the fifth pipeline (443) to pump the refrigerant entering the first outlet into the first pipeline (22).

6. The air conditioning system according to claim 3, characterized in that, The control structure (42) is a control valve. The second emergency module (45) further includes: A sixth pipeline (451), one end of the sixth pipeline (451) communicates with the second pipeline (33), and the other end of the sixth pipeline (451) communicates with the buffer structure (43) of the second emergency module (45); A third pump body (452), the third pump body (452) is arranged on the sixth pipeline (451) to pump the refrigerant in the first pipeline (22) into the buffer structure (43).

7. The air conditioning system according to claim 6, characterized in that, The buffer structure (43) of the second emergency module (45) has a second inlet and a second outlet. The third pipeline (41) and / or the sixth pipeline (451) communicate with the second inlet. The second emergency module (45) further includes: A seventh pipeline (453), one end of the seventh pipeline (453) communicates with the second pipeline (33), and the other end of the seventh pipeline (453) communicates with the second outlet; A fourth pump body (454), the fourth pump body (454) is arranged on the seventh pipeline (453) to pump the refrigerant entering the second outlet into the second pipeline (33).

8. The air conditioning system according to claim 3, characterized in that, The second refrigeration circuit (20) further includes: An eighth pipeline (23), the other end of the first evaporator (21) is connected to the heat exchanger (13) through the eighth pipeline (23); A first liquid storage device (24), arranged on the first pipeline (22); wherein, the height of the heat exchanger (13) is higher than the height of the first liquid storage device (24); the first emergency module (44) communicates with the first liquid storage device (24).

9. The air conditioning system according to claim 8, characterized in that, There is one first evaporator (21), and the height of the first liquid storage device (24) is higher than the height of the first evaporator (21); or, there are multiple first evaporators (21), and the multiple first evaporators (21) are arranged at intervals along the height direction and / or the length direction of the air conditioning system, and the height of the first liquid storage device (24) is higher than the first evaporator (21) at the highest position among the multiple first evaporators (21).

10. The air conditioning system according to claim 3, characterized in that, The third refrigeration circuit (30) further includes: A ninth pipeline (34), the other end of the second evaporator (32) is connected to the second condenser (31) through the ninth pipeline (34); A second liquid reservoir (35) is provided on the second pipeline (33); wherein, the height of the second condenser (31) is higher than the height of the second liquid reservoir (35); the second emergency module (45) is communicated with the second liquid reservoir (35).

11. The air conditioning system according to claim 10, characterized in that, There is one second evaporator (32), and the height of the second liquid reservoir (35) is higher than the height of the second evaporator (32); or, there are multiple second evaporators (32), and the multiple second evaporators (32) are arranged at intervals along the height direction and / or the length direction of the air-conditioning system, and the height of the second liquid reservoir (35) is higher than the second evaporator (32) at the highest position among the multiple second evaporators (32).

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