Cooling system

Abstract

The utility model discloses a cooling system which comprises a first cooling assembly, a second cooling assembly, a third cooling assembly, a first heat exchange unit, a second heat exchange unit and a third heat exchange unit. A first heat exchange loop is arranged between the first cooling assembly and the second cooling assembly; the first heat exchange unit is connected with the first cooling assembly; the first heat exchange unit is connected with the third cooling assembly; the second heat exchange unit is connected with the second cooling assembly; the second heat exchange unit is connected with the third cooling assembly; the third heat exchange unit is connected with the second cooling assembly; the third heat exchange unit is connected with the third heat exchange assembly; the third heat exchange unit is connected with the first cooling assembly. On the premise that refrigeration energy consumption of the air-cooled precise air conditioner is not increased, the air-cooled precise air conditioner can fully utilize an outdoor natural cooling mode to ensure that the supply temperature of liquid-cooled cooling water is constant.

Description

Technical Field

[0001] The utility model relates to the technical field of data center liquid cooling systems, and in particular to a cooling system. Background Art

[0002] Since the working water temperature of the liquid cooling system is more than 15°C higher than that of the chilled water system in traditional data centers, the difference is quite large. Currently, one of the common practices for expanding the liquid cooling system in existing data centers is to add a new cooling device for the liquid cooling system, which is completely isolated from the existing data center refrigeration system and can use the higher temperature cooling water for heat exchange in the liquid cooling system, which is relatively energy-saving. The second common practice is to use the chilled water of the existing refrigeration system as the cooling source for liquid cooling; this is for data centers with low load rates in the early stage, which have more abundant chilled water cooling capacity to use. This solution does not require investing in a new set of cooling device systems in one of the aforementioned common practices.

[0003] When expanding a liquid cooling room in an existing data center, one of the common practices to solve the problem of liquid cooling heat dissipation is to add a new cooling device, which is completely isolated from the existing data center refrigeration system. This has obvious shortcomings: 1. The new cooling device requires a large footprint, and most projects do not have space conditions on the roof or ground; 2. Further adding a dedicated cooling device on the roof, due to the heavy equipment, the roof structure needs to be reinforced, the roof waterproof layer will be damaged, and the repair process will affect the safe operation of the top-floor computer room; 3. The existing building does not have extra pipe wells, and adding a new cooling device on the roof requires the cooling water pipe to be vertically guided into the liquid cooling server room, which is difficult to implement; 4. The investment in adding a dedicated cooling device is high; 5. Adding a cooling device will inevitably cause a significant increase in the workload of operation and maintenance. 6. The adaptability to flexible changes in business is poor. When the actual use of liquid cooling cabinets and conventional cabinets is greatly different from the business volume based on the construction plan, the return on investment of the new cooling device will inevitably be greatly different from the initial idea, which does not meet the interests of the enterprise. The second common practice is to use the chilled water of the existing refrigeration system as the cooling source for liquid cooling. This also has shortcomings: First, the production cost of chilled water in the existing refrigeration system is relatively high, and it is not a cold source for natural cooling throughout the year. Most projects rely on mechanical refrigeration of compressors to produce low-temperature chilled water for at least half of the time. Using the existing low-temperature "expensive" chilled water for liquid cooling will inevitably consume a lot of energy; Second, since the water supply temperature of the existing chilled water is generally 15°C or below, and the temperature in the liquid cooling server area is above 50°C, even if the cooling water for liquid cooling is obtained through secondary heat exchange, There is also the possibility of condensation on indoor surface objects and server surfaces, which is a safety risk that electronic components cannot tolerate; third, because liquid cooling consumes high-quality chilled water resources of ordinary cabinets throughout the year, it reduces the redundancy capacity of the entire data center refrigeration system. Many projects do not support such project establishment and implementation from a safety perspective; fourth, it is not conducive to long-term development. With the increase of IT load, if the cooling capacity is insufficient, it is necessary to expand the capacity of water-cooled chillers, cooling towers, water pumps and other refrigeration-related equipment, which requires support from many aspects such as computer room space and power expansion. Most projects do not have such conditions. Utility Model Content

[0004] The purpose of the utility model is to provide a cooling system to solve the deficiencies in the prior art. It can make full use of the surplus refrigeration and heat dissipation capacity of the existing data center, and without increasing the refrigeration energy consumption of air-cooled precision air conditioners, it can make full use of outdoor natural cooling to ensure that the temperature of the liquid-cooled cooling water supply is constant and the structure is reasonably set.

[0005] The utility model provides a cooling system, which comprises a first cooling component, a second cooling component, a third cooling component, a first heat exchange unit, a second heat exchange unit and a third heat exchange unit;

[0006] A first heat exchange circuit is provided between the first cooling assembly and the second cooling assembly;

[0007] The first heat exchange unit is connected to the first cooling assembly to form a second heat exchange loop; the first heat exchange unit is connected to the third cooling assembly to form a third heat exchange loop;

[0008] The second heat exchange unit is connected to the second cooling assembly to form a fourth heat exchange loop; the second heat exchange unit is connected to the third cooling assembly to form a fifth heat exchange loop;

[0009] The third heat exchange unit is connected to the second cooling assembly to form a sixth heat exchange loop; the third heat exchange unit is connected to the third cooling assembly to form a seventh heat exchange loop;

[0010] The third heat exchange unit is connected to the first cooling assembly to form an eighth heat exchange loop.

[0011] The cooling system as described above, wherein optionally: the first heat exchange unit includes a liquid-cooled primary side circulation pump, a liquid-cooled primary side heat exchanger, a third control valve, a nineteenth control valve and a twenty-second control valve;

[0012] The liquid-cooled primary side circulation pump is connected to the first inlet of the liquid-cooled primary side heat exchanger; the first outlet of the liquid-cooled primary side heat exchanger is connected to the first cooling component; the twenty-second control valve is arranged on the pipeline connecting the first inlet of the liquid-cooled primary side heat exchanger and the first outlet of the liquid-cooled primary side heat exchanger;

[0013] The second outlet of the liquid-cooled primary-side heat exchanger can be communicated with the third cooling assembly, and the second inlet of the liquid-cooled primary-side heat exchanger can be communicated with the third cooling assembly;

[0014] The nineteenth control valve is communicated with the second inlet of the liquid-cooled primary-side heat exchanger, and the third control valve is installed on a pipeline connecting the inlet end of the nineteenth control valve and the second outlet of the liquid-cooled primary-side heat exchanger.

[0015] The cooling system as described above, wherein, optionally, the second heat exchange unit includes a first water-cooled chiller, a first plate heat exchanger, a first air conditioning circulation pump and a first cooling circulation pump;

[0016] The second cooling assembly, the first air-conditioning circulation pump, the first inlet of the first plate heat exchanger, the first outlet of the first plate heat exchanger, the first inlet of the first water-cooled chiller, and the first outlet of the first water-cooled chiller are connected in series in sequence;

[0017] An eleventh control valve is provided at the first inlet of the first plate heat exchanger; a second control valve is provided at the first inlet of the first water-cooled chiller;

[0018] A first bypass pipeline is provided between the first inlet of the first plate heat exchanger and the first outlet of the first plate heat exchanger, and a first control valve is provided on the first bypass pipeline;

[0019] A second bypass pipeline is provided between the first inlet of the first water-cooled chiller and the first outlet of the first water-cooled chiller; a twelfth control valve is provided on the second bypass pipeline;

[0020] The third cooling assembly, the first cooling circulation pump, the second inlet of the first plate heat exchanger, the second outlet of the first plate heat exchanger, the second inlet of the first water-cooled chiller, and the second outlet of the first water-cooled chiller are connected in series in sequence;

[0021] A thirteenth control valve is provided at the second inlet of the first plate heat exchanger; a fifth control valve is provided at the second inlet of the first water-cooled chiller;

[0022] A third bypass pipeline and a fourth control valve for controlling the on-off of the third bypass pipeline are provided between the second inlet of the first plate heat exchanger and the second outlet of the first plate heat exchanger;

[0023] A fourth bypass pipeline and a fourteenth control valve for controlling the on-off of the fourth bypass pipeline are provided between the second inlet of the first water-cooled chiller and the second outlet of the first water-cooled chiller.

[0024] In the cooling system as described above, optionally, the fourteenth control valve is connected to the third control valve via a pipeline, so that the fourth control valve, the fourteenth control valve and the third control valve can be connected in series.

[0025] In the cooling system as described above, optionally, the first water-cooled chiller includes a first compressor, a first condenser, a first throttling device and a first evaporator connected in series end to end.

[0026] The cooling system as described above, wherein, optionally, the third heat exchange unit includes a second plate heat exchanger, a second water-cooled chiller, a second air conditioning circulation pump and a second cooling circulation pump;

[0027] The first cooling assembly, the second air conditioning circulation pump, the first inlet of the second plate heat exchanger, the first outlet of the second plate heat exchanger, the first inlet of the second water-cooled chiller and the first outlet of the second water-cooled chiller are connected in series in sequence;

[0028] A fifteenth control valve is installed at the first outlet of the second plate heat exchanger, and an eighth control valve is installed at the first inlet of the second water-cooled chiller;

[0029] A fifth bypass pipeline is provided between the first inlet of the second plate heat exchanger and the first outlet of the second plate heat exchanger, and a seventh control valve is installed on the fifth bypass pipeline;

[0030] A sixth bypass pipeline is provided between the first inlet of the second water-cooled chiller and the first outlet of the second water-cooled chiller, and a sixteenth control valve is installed on the sixth bypass pipeline;

[0031] The third cooling assembly, the second cooling circulation pump, the second inlet of the second plate heat exchanger, the second outlet of the second plate heat exchanger, the second inlet of the second water-cooled chiller and the second outlet of the second water-cooled chiller are connected in series in sequence;

[0032] A seventeenth control valve is installed at the second inlet of the second plate heat exchanger, a seventh bypass pipeline is provided between the second inlet of the second plate heat exchanger and the second outlet of the second plate heat exchanger, and a ninth control valve is installed on the seventh bypass pipeline;

[0033] A tenth control valve is installed at the second inlet of the second water-cooled chiller; an eighth bypass pipeline is provided between the second inlet of the second water-cooled chiller and the second outlet of the second water-cooled chiller, and an eighteenth control valve is provided on the eighth bypass pipeline.

[0034] The cooling system as described above, wherein optionally: a twentieth control valve is provided on the pipeline connecting the first cooling assembly and the second air conditioning circulation pump;

[0035] The second air-conditioning circulation pump is connected to the second cooling component through a pipeline; a sixth control valve is arranged on the pipeline connecting the second air-conditioning circulation pump and the second cooling component.

[0036] The cooling system as described above, wherein optionally: the pipeline connecting the first outlet of the second plate heat exchanger and the first inlet of the second water-cooled chiller is connected to the first cooling component through a return pipe; and a twenty-first control valve is provided on the return pipe.

[0037] In the cooling system as described above, optionally, the second water-cooled chiller comprises a second compressor, a second condenser, a second throttling device and a second evaporator connected in series end to end.

[0038] The cooling system as described above, wherein optionally: the third cooling assembly includes at least two cooling towers.

[0039] Compared with the prior art, the utility model makes full use of the abundant cooling and heat dissipation capacity of the existing data center, and sets a first heat exchange circuit between the first cooling component and the second cooling component without increasing the cooling energy consumption of the air-cooled precision air conditioner, and forms multiple heat exchange circuits between the first cooling component, the second cooling component and the third cooling component, so that cooling can be achieved by a combination of different heat exchange circuits at ambient temperatures in different seasons. While ensuring the refrigeration of the air-cooled precision air conditioner, the utility model can provide efficient and constant temperature circulating cold water for the liquid cooling system throughout the year. The first heat exchange circuit, the second heat exchange circuit, the third heat exchange circuit, the fourth heat exchange circuit, the fifth heat exchange circuit, the sixth heat exchange circuit, the seventh heat exchange circuit and the eighth heat exchange circuit are respectively set between the first cooling component and the third cooling component, and between the second cooling component and the third cooling component. Through the combination of different heat exchange circuits, different degrees of heat exchange effects can be achieved. Since the second heat exchange unit includes a first water-cooled chiller, when the second heat exchange unit performs heat exchange, the water temperature in the first water-cooled chiller is adjusted, which can ensure the temperature of the liquid cooling water supply and keep it within a relatively constant temperature range. The utility model provides a liquid cooling cooling system for expanding an existing data center, which saves manpower, land, materials, energy, and the environment, and has obvious advantages of "four savings and one environmental protection". It can be widely used in the scenarios of newly building, renovating, and expanding liquid cooling rooms in existing data centers. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of the cooling system proposed by the utility model;

[0041] Figure 2 It is a structural schematic diagram of the first water-cooled chiller proposed by the utility model;

[0042] Figure 3 It is a structural schematic diagram of the second water-cooled chiller proposed by the utility model;

[0043] Figure 4 It is a schematic diagram of the first working mode of the cooling system proposed by the utility model;

[0044] Figure 5 is a schematic diagram of a second working mode of the cooling system proposed by the utility model;

[0045] Figure 6 It is a schematic diagram of the third working mode of the cooling system proposed by the utility model;

[0046] Figure 7 is a schematic diagram of a fourth working mode of the cooling system proposed by the utility model;

[0047] Figure 8 is a schematic diagram of the fifth working mode of the cooling system proposed by the utility model;

[0048] Fig. 9 is a schematic diagram of the sixth working mode of the cooling system proposed by the utility model;

[0049] Fig.10 is a schematic diagram of the seventh working mode of the cooling system proposed by the utility model;

[0050] Fig.11 is a schematic diagram of the eighth working mode of the cooling system proposed by the utility model;

[0051] Fig.12 It is a schematic diagram of the ninth working mode of the cooling system proposed by the utility model.

[0052] Description of reference numerals:

[0053] 1-air-cooled precision air conditioning terminal, 2-first air conditioning circulation pump, 3-first control valve, 4-second control valve, 5-first water-cooled chiller, 6-first evaporator, 7-first condenser, 8-third control valve, 9-cooling tower, 10-first cooling circulation pump, 11-fourth control valve, 12-fifth control valve, 13-sixth control valve, 14-second air conditioning circulation pump, 15-seventh control valve, 16-eighth control valve, 17-second water-cooled chiller, 18-second evaporator, 19-second condenser, 20-second cooling circulation pump, 21-ninth control valve, 22-tenth control valve, 23-eleventh control valve, 24-first plate heat exchanger , 25 - twelfth control valve, 26 - thirteenth control valve, 27 - fourteenth control valve, 28 - fifteenth control valve, 29 - second plate heat exchanger, 30 - sixteenth control valve, 31 - seventeenth control valve, 32 - eighteenth control valve, 33 - liquid-cooled precision air conditioning terminal, 34 - liquid-cooled secondary side heat exchanger, 35 - liquid-cooled secondary side circulation pump, 36 - liquid-cooled primary side circulation pump, 37 - liquid-cooled primary side heat exchanger, 38 - nineteenth control valve, 39 - twentieth control valve, 40 - twenty-first control valve, 41 - twenty-second control valve, 42 - first compressor, 43 - first throttling device, 44 - second compressor, 45 - second throttling device. DETAILED DESCRIPTION

[0054] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0055] In view of the problems raised in the background technology, it is necessary to provide a cooling system for liquid cooling of an existing data center, which can fully utilize the surplus cooling and heat dissipation capacity of the existing data center, and fully utilize the outdoor natural cooling method to ensure that the temperature of the liquid cooling water supply is constant and the structure is reasonably set without increasing the refrigeration energy consumption of air-cooled precision air conditioners. To this end, the utility model proposes the following solution.

[0056] Embodiment 1

[0057] Please refer to Figures 1 to 12 , the utility model proposes a cooling system, which includes a first cooling component, a second cooling component, a third cooling component, a first heat exchange unit, a second heat exchange unit and a third heat exchange unit;

[0058] Among them, the first cooling component includes corresponding pipes, valves, heat exchangers and other components, which are used to form different heat exchange circuits between the first heat exchange unit and the third heat exchange unit. The second cooling component includes corresponding pipes, valves, heat exchangers and other components, which are used to form different heat exchange circuits between the second heat exchange unit and the third heat exchange unit. The third cooling component includes corresponding pipes, valves, heat exchangers and other components, which are used to form different heat exchange circuits with the first heat exchange unit, the second heat exchange unit and the third heat exchange unit, respectively. So as to achieve different degrees of heat exchange through the working states between different heat exchange circuits.

[0059] Specifically, a first heat exchange circuit is provided between the first cooling component and the second cooling component; that is, heat exchange between the first cooling component and the second cooling component is achieved through the first heat exchange circuit, and more specifically, heat exchange between the first cooling component and the liquid-cooled precision air-conditioning terminal 33 is achieved.

[0060] The first heat exchange unit is connected to the first cooling component to form a second heat exchange loop; the first heat exchange unit is connected to the third cooling component to form a third heat exchange loop; the first heat exchange unit is used to achieve heat exchange between the liquid in the second heat exchange loop and the liquid in the third heat exchange loop. In specific implementation, in order to ensure a good heat exchange effect, the second heat exchange loop and the third heat exchange loop work simultaneously.

[0061] The second heat exchange unit is connected to the second cooling assembly to form a fourth heat exchange loop; the second heat exchange unit is connected to the third cooling assembly to form a fifth heat exchange loop. The second heat exchange unit is used to achieve heat exchange between the second cooling assembly and the third cooling assembly. In specific use, in order to ensure a good heat exchange effect, the fourth heat exchange loop and the fifth heat exchange loop work simultaneously.

[0062] The third heat exchange unit is connected to the second cooling component to form a sixth heat exchange loop; the third heat exchange unit is connected to the third heat exchange component to form a seventh heat exchange loop; the third heat exchange unit is used to realize heat exchange between the second cooling component and the third cooling component. During specific use, in order to ensure a good heat exchange effect, the seventh heat exchange loop can work simultaneously with the sixth heat exchange loop.

[0063] The third heat exchange unit is connected to the first cooling assembly to form an eighth heat exchange loop. That is, the third heat exchange unit is also used to achieve heat exchange between the first cooling assembly and the third cooling assembly. In specific use, in order to ensure a good heat exchange effect, the seventh heat exchange loop can work simultaneously with the eighth heat exchange loop.

[0064] In a specific implementation, the second cooling component includes an air-cooled precision air conditioning terminal 1; the third cooling component includes a cooling tower 9. That is, the liquid in the third cooling component is cooled by the cooling tower 9 to achieve the effect of natural air cooling. In a specific implementation, the number of cooling towers 9 can be at least two.

[0065] In order to achieve heat exchange between the first cooling component and the second cooling component, the first heat exchange circuit includes a liquid-cooled precision air conditioning terminal 33, a liquid-cooled secondary side heat exchanger 34 and a liquid-cooled secondary side circulation pump 35 connected in series. The liquid-cooled secondary side circulation pump 35 pumps the liquid in the first heat exchange circuit into the liquid-cooled precision air conditioning terminal 33, and then performs heat exchange through the liquid-cooled secondary side heat exchanger 34.

[0066] In specific implementation, there are two ways to achieve heat exchange between the first cooling assembly and the third cooling assembly, namely, through the first heat exchange unit and through the third heat exchange unit. The first heat exchange unit and the third heat exchange unit have different heat exchange capacities to achieve different heat exchange effects.

[0067] Specifically, the first heat exchange unit includes a liquid-cooled primary-side circulation pump 36 , a liquid-cooled primary-side heat exchanger 37 , a third control valve 8 , a nineteenth control valve 38 and a twenty-second control valve 41 .

[0068] The liquid-cooled primary side circulation pump 36 is in communication with the first inlet of the liquid-cooled primary side heat exchanger 37; the first outlet of the liquid-cooled primary side heat exchanger 37 is in communication with the first cooling assembly; the 22nd control valve 41 is arranged on the pipeline connecting the first inlet of the liquid-cooled primary side heat exchanger 37 and the first outlet of the liquid-cooled primary side heat exchanger 37. The second outlet of the liquid-cooled primary side heat exchanger 37 can be in communication with the third cooling assembly, and the second inlet of the liquid-cooled primary side heat exchanger 37 can be in communication with the third cooling assembly; the 19th control valve 38 is in communication with the second inlet of the liquid-cooled primary side heat exchanger 37, and the third control valve 8 is installed on the pipeline connecting the inlet end of the 19th control valve 38 and the second outlet of the liquid-cooled primary side heat exchanger 37.

[0069] Through the specific structure of the first heat exchange unit proposed above, the heat exchange of the first heat exchange unit is mainly achieved by the liquid-cooled primary-side heat exchanger 37. In some implementations, the liquid-cooled primary-side heat exchanger 37 can be a plate heat exchanger.

[0070] In some implementations, the second heat exchange unit includes a first water-cooled chiller 5, a first plate heat exchanger 24, a first air conditioning circulation pump 2, and a first cooling circulation pump 10. That is, the second heat exchange unit exchanges heat through the first water-cooled chiller 5 and / or the first plate heat exchanger 24.

[0071] The second cooling component, the first air-conditioning circulation pump 2, the first inlet of the first plate heat exchanger 24, the first outlet of the first plate heat exchanger 24, the first inlet of the first water-cooled chiller 5, and the first outlet of the first water-cooled chiller 5 are connected in series in sequence.

[0072] An eleventh control valve 23 is provided at the first inlet of the first plate heat exchanger 24 ; a second control valve 4 is provided at the first inlet of the first water-cooled chiller 5 .

[0073] A first bypass pipeline is provided between the first inlet of the first plate heat exchanger 24 and the first outlet of the first plate heat exchanger 24 , and a first control valve 3 is provided on the first bypass pipeline.

[0074] A second bypass pipeline is provided between the first inlet of the first water-cooled chiller 5 and the first outlet of the first water-cooled chiller 5 ; a twelfth control valve 25 is provided on the second bypass pipeline.

[0075] The third cooling component, the first cooling circulation pump, the second inlet of the first plate heat exchanger 24, the second outlet of the first plate heat exchanger 24, the second inlet of the first water-cooled chiller 5, and the second outlet of the first water-cooled chiller 5 are connected in series in sequence.

[0076] A thirteenth control valve 26 is provided at the second inlet of the first plate heat exchanger 24 ; a fifth control valve 12 is provided at the second inlet of the first water-cooled chiller 5 .

[0077] A third bypass pipeline and a fourth control valve 11 for controlling the on-off of the third bypass pipeline are provided between the second inlet of the first plate heat exchanger 24 and the second outlet of the first plate heat exchanger 24 .

[0078] A fourth bypass pipeline and a fourteenth control valve 27 for controlling the on-off of the fourth bypass pipeline are provided between the second inlet of the first water-cooled chiller 5 and the second outlet of the first water-cooled chiller 5 .

[0079] Through the above setting, the heat exchanger in the fourth heat exchange loop can be realized by only the first plate heat exchanger 24, or by only the first water-cooled chiller 5, or by the first plate heat exchanger 24 and the first water-cooled chiller 5 connected in series. Correspondingly, the heat exchanger in the fifth heat exchange loop can be realized by only the first plate heat exchanger 24, or by only the first water-cooled chiller 5, or by the first plate heat exchanger 24 and the first water-cooled chiller 5 connected in series. Since the third cooling component can be set to a natural cooling mode, and the first plate heat exchanger 24 in the heat exchange loop is connected in series with the first water-cooled chiller 5, the first cooling component or the second cooling component can exchange heat with the third cooling component through the plate heat exchanger, making full use of the outdoor natural cooling mode to ensure that the temperature of the liquid cooling water supply is constant and the structure is reasonably set.

[0080] In a specific implementation, the fourteenth control valve 27 is connected to the third control valve 8 through a pipeline, so that the fourth control valve 11, the fourteenth control valve 27 and the third control valve 8 can be connected in series. In this way, the first heat exchange unit and the second heat exchange unit can share the first cooling circulation pump 10.

[0081] In a specific implementation, the first water-cooled chiller 5 includes a first compressor, a first condenser 7, a first throttling device and a first evaporator 6 connected in series end to end. In this way, the heat exchange capacity can be improved.

[0082] In a specific implementation, the third heat exchange unit includes a second plate heat exchanger 29 , a second water-cooled chiller 17 , a second air conditioning circulation pump 14 and a second cooling circulation pump 20 .

[0083] The first cooling component, the second air-conditioning circulation pump 14, the first inlet of the second plate heat exchanger 29, the first outlet of the second plate heat exchanger 29, the first inlet of the second water-cooled chiller 17 and the first outlet of the second water-cooled chiller 17 are connected in series in sequence.

[0084] A fifteenth control valve 28 is installed at the first outlet of the second plate heat exchanger 29 , and an eighth control valve 16 is installed at the first inlet of the second water-cooled chiller 17 .

[0085] A fifth bypass pipeline is provided between the first inlet of the second plate heat exchanger 29 and the first outlet of the second plate heat exchanger 29 , and a seventh control valve 15 is installed on the fifth bypass pipeline.

[0086] A sixth bypass pipeline is provided between the first inlet of the second water-cooled chiller 17 and the first outlet of the second water-cooled chiller 17 , and a sixteenth control valve 30 is installed on the sixth bypass pipeline.

[0087] The third cooling assembly, the second cooling circulation pump 20, the second inlet of the second plate heat exchanger 29, the second outlet of the second plate heat exchanger 29, the second inlet of the second water-cooled chiller 17 and the second outlet of the second water-cooled chiller 17 are connected in series in sequence.

[0088] A seventeenth control valve 31 is installed at the second inlet of the second plate heat exchanger 29 , a seventh bypass pipeline is provided between the second inlet of the second plate heat exchanger 29 and the second outlet of the second plate heat exchanger 29 , and a ninth control valve 21 is installed on the seventh bypass pipeline.

[0089] A tenth control valve 22 is installed at the second inlet of the second water-cooled chiller 17; an eighth bypass pipeline is provided between the second inlet of the second water-cooled chiller 17 and the second outlet of the second water-cooled chiller 17, and an eighteenth control valve 32 is provided on the eighth bypass pipeline.

[0090] The third heat exchange unit can realize heat exchange between the second cooling component and the third cooling component. Moreover, since the third heat exchange unit has the second plate heat exchanger 29 and the second water-cooled chiller 17, heat exchange of different degrees can be realized. The combination of the second heat exchange unit and the third heat exchange unit can facilitate the realization of a variety of different degrees of heat exchange to meet the ambient temperature and cooling intensity requirements of different seasons.

[0091] In the specific implementation, in order to achieve a strong heat exchange effect between the first cooling assembly and the third cooling assembly, a twentieth control valve 39 is provided on the pipeline connecting the first cooling assembly and the second air conditioning circulation pump 14. The second air conditioning circulation pump 14 is connected to the second cooling assembly through a pipeline; a sixth control valve 13 is provided on the pipeline connecting the second air conditioning circulation pump 14 and the second cooling assembly. Through the sixth control valve 13 and the twentieth control valve 39, the liquid entering the second air conditioning circulation pump 14 can be switched to achieve switching between the first cooling assembly and the second cooling assembly, so as to achieve more heat exchange circuit combinations.

[0092] In order to enable the third heat exchange unit to cool the liquid in the first cooling assembly, the pipeline connecting the first outlet of the second plate heat exchanger 29 and the first inlet of the second water-cooled chiller 17 is connected to the first cooling assembly through a return pipe; a twenty-first control valve 40 is provided on the return pipe.

[0093] Embodiment 2

[0094] In this embodiment, see Figure 1 The existing data center has a liquid cooling cooling system for expansion, including an air-cooled precision air-conditioning terminal 1, a liquid-cooled precision air-conditioning terminal 33, a first water-cooled chiller 5, a second water-cooled chiller 17, a first plate heat exchanger 24, a second plate heat exchanger 29, a liquid-cooled primary side heat exchanger 37, a liquid-cooled secondary side heat exchanger 34, a cooling tower 9, pipelines connecting the above equipment, and twenty-two control valves arranged on the pipelines.

[0095] See Figure 2 The first water-cooled chiller 5 includes a first compressor 42, a first condenser 7, a first throttling device 43 and a first evaporator 6 which are connected in a cycle in sequence; the first compressor 42, the first condenser 7, the first throttling device 43 and the first evaporator 6 are connected in a cycle in sequence.

[0096] See Figure 3 The second water-cooled chiller 17 includes a second compressor 44, a second condenser 19, a second throttling device 45 and a second evaporator 18 which are cyclically connected in sequence; the second compressor 44, the second condenser 19, the second throttling device 45 and the second evaporator 18 are cyclically connected in sequence.

[0097] See Figure 1 The air-cooled precision air-conditioning terminal 1 is connected to the first air-conditioning circulation pump 2, the first control valve 3, the second control valve 4, and the first evaporator 6 in sequence; the first condenser 7 is connected to the third control valve 8, the cooling tower 9, the first cooling water circulation pump 10, the fourth control valve 11, and the fifth control valve 12 in sequence.

[0098] See Figure 1The air-cooled precision air-conditioning terminal 1 is connected to the sixth control valve 13, the second air-conditioning circulation pump 14, the seventh control valve 15, the eighth control valve 16, and the second evaporator 18 in sequence; the second condenser 19 is connected to the cooling tower 9, the second cooling water circulation pump 20, the ninth control valve 21, and the tenth control valve 22 in sequence.

[0099] See Figure 1 The air-cooled precision air-conditioning terminal 1 is connected to the first air-conditioning circulation pump 2, the eleventh control valve 23, the first plate heat exchanger 24, the twelfth control valve 25, and the first evaporator 6 in sequence; the first condenser 7 is connected to the third control valve 8, the cooling tower 9, the first cooling water circulation pump 10, the thirteenth control valve 26, and the fourteenth control valve 27 in sequence.

[0100] See Figure 1 The air-cooled precision air-conditioning terminal 1 is connected to the sixth control valve 13, the second air-conditioning circulation pump 14, the fifteenth control valve 28, the second plate heat exchanger 29, the sixteenth control valve 30, and the second evaporator 18 in sequence; the second condenser 19 is connected to the cooling tower 9, the second cooling water circulation pump 20, the seventeenth control valve 31, and the eighteenth control valve 32 in sequence.

[0101] See Figure 1 The air-cooled precision air-conditioning terminal 1 is connected to the first air-conditioning circulation pump 2, the eleventh control valve 23, the first plate heat exchanger 24, the second control valve 4, and the first evaporator 6 in sequence; the first condenser 7 is connected to the third control valve 8, the cooling tower 9, the first cooling water circulation pump 10, the thirteenth control valve 26, and the fifth control valve 12 in sequence.

[0102] See Figure 1 The air-cooled precision air-conditioning terminal 1 is connected to the sixth control valve 13, the second air-conditioning circulation pump 14, the fifteenth control valve 28, the second plate heat exchanger 29, the eighth control valve 16, and the second evaporator 18 in sequence; the second condenser 19 is connected to the cooling tower 9, the second cooling water circulation pump 20, the seventeenth control valve 31, and the tenth control valve 22 in sequence.

[0103] See Figure 1 The liquid-cooled precision air-conditioning terminal 33 is connected to the liquid-cooled secondary side heat exchanger 34 and the liquid-cooled secondary side circulation pump 35 in sequence; the liquid-cooled secondary side heat exchanger 34 is connected to the liquid-cooled primary side circulation pump 36 and the liquid-cooled primary side heat exchanger 37 in sequence; the liquid-cooled secondary side heat exchanger 34 is connected to the liquid-cooled primary side circulation pump 36 and the twenty-second control valve 41 in sequence.

[0104] See Figure 1The liquid-cooled primary side heat exchanger 37 is connected to the cooling tower 9, the first cooling water circulation pump 10, the fourth control valve 11, the fourteenth control valve 27, and the nineteenth control valve 38 in sequence; the liquid-cooled primary side heat exchanger 37 is connected to the cooling tower 9, the first cooling water circulation pump 10, the fourth control valve 11, the fifth control valve 12, and the nineteenth control valve 38 in sequence; the liquid-cooled primary side heat exchanger 37 is connected to the cooling tower 9, the first cooling water circulation pump 10, the thirteenth control valve 26, the fourteenth control valve 27, and the nineteenth control valve 38 in sequence; the liquid-cooled primary side heat exchanger 37 is connected to the cooling tower 9, the first cooling water circulation pump 10, the thirteenth control valve 26, the fifth control valve 12, and the nineteenth control valve 38 in sequence.

[0105] See Figure 1 The liquid-cooled secondary side heat exchanger 34 is connected to the twentieth control valve 39, the second air-conditioning circulation pump 14, the fifteenth control valve 28, the second plate heat exchanger 29, and the twenty-first control valve 40 in sequence; the liquid-cooled secondary side heat exchanger 34 is connected to the twentieth control valve 39, the second air-conditioning circulation pump 14, the seventh control valve 15, and the twenty-first control valve 40 in sequence.

[0106] In this embodiment, the control method of the cooling system for expanding the liquid cooling of an existing data center includes multiple working modes:

[0107] (1) The first working mode, i.e., the first water-cooled chiller refrigerates the air-cooled precision air conditioner terminal:

[0108] Please refer to Figure 4, open the air-cooled precision air-conditioning terminal 1, the first air-conditioning circulation pump 2, the first control valve 3, the second control valve 4, the first water-cooled chiller 5, the third control valve 8, the cooling tower 9, the first cooling circulation pump 10, the fourth control valve 11, and the fifth control valve 12; firstly, the air-cooled precision air-conditioning terminal 1 transfers the heat of the refrigerant with heat to the first evaporator 6 of the first water-cooled chiller 5 through the first air-conditioning circulation pump 2, the first control valve 3, and the second control valve 4, and exchanges heat with the refrigerant in the first water-cooled chiller 5, and then transfers the heat of the first evaporator 6 to the first condenser 7 through the internal refrigeration cycle of the first water-cooled chiller 5, and the refrigerant cooled by the first evaporator 6 after heat exchange is transferred back to the air-cooled precision air-conditioning terminal 1, and at the same time, it is sequentially transferred from the first The cooling water heated by the cooling circulation pump 10, the fourth control valve 11 and the fifth control valve 12 entering the first condenser 7 and exchanging heat with the first condenser 7 returns to the cooling tower 9 through the third control valve 8; that is, the refrigeration cycle of the air-cooled precision air-conditioning terminal 1 is: air-cooled precision air-conditioning terminal 1→first air-conditioning circulation pump 2→first control valve 3→second control valve 4→first evaporator 6→air-cooled precision air-conditioning terminal 1; the internal refrigeration cycle of the first water-cooled chiller is: first evaporator 6→first compressor 42→first condenser 7→first throttling device 43→first evaporator 6; the refrigeration cycle of the cooling tower is: cooling tower 9→first cooling circulation pump 10→fourth control valve 11→fifth control valve 12→first condenser 7→third control valve 8→cooling tower 9;

[0109] (2) The second working mode, that is, the first plate heat exchanger is used for the terminal cooling mode of the air-cooled precision air conditioner:

[0110] Please refer to Figure 5 , open the air-cooled precision air-conditioning terminal 1, the first air-conditioning circulation pump 2, the third control valve 8, the cooling tower 9, the first cooling circulation pump 10, the eleventh control valve 23, the twelfth control valve 25, the thirteenth control valve 26, and the fourteenth control valve 27; firstly, the air-cooled precision air-conditioning terminal 1 transfers the heat of the refrigerant with heat to the first plate heat exchanger 24 through the first air-conditioning circulation pump 2, the eleventh control valve 23, and the twelfth control valve 25, and the refrigerant cooled after heat exchange in the first plate heat exchanger 24 is then transferred back to the air-cooled precision air-conditioning terminal 1, and at the same time, the first cooling circulation pump 10, the thirteenth control valve 26, the fourteenth control valve 27 are sequentially connected to the cooling tower 9. The fourteenth control valve 27 enters the first plate heat exchanger 24, and the cooling water heated after heat exchange with the first plate heat exchanger 24 returns to the cooling tower 9 through the fourteenth control valve 27 and the third control valve 8; that is, the refrigeration cycle of the air-cooled precision air-conditioning terminal 1 is: air-cooled precision air-conditioning terminal 1→first air-conditioning circulation pump 2→eleventh control valve 23→first plate heat exchanger 24→twelfth control valve 25→air-cooled precision air-conditioning terminal 1; the refrigeration cycle of the cooling tower is: cooling tower 9→first cooling circulation pump 10→thirteenth control valve 26→first plate heat exchanger 24→fourteenth control valve 27→third control valve 8→cooling tower 9;

[0111] (3) The third working mode, that is, the first water-cooled chiller unit and the first heat exchanger are used to cool the air-cooled precision air conditioner terminal:

[0112] Please refer to Figure 6 , open the air-cooled precision air-conditioning terminal 1, the first air-conditioning circulation pump 2, the second control valve 4, the first water-cooled chiller 5, the third control valve 8, the cooling tower 9, the first cooling circulation pump 10, the fifth control valve 12, the eleventh control valve 23, the twelfth control valve 25, the thirteenth control valve 26, and the fourteenth control valve 27; firstly, the air-cooled precision air-conditioning terminal 1 transfers part of the heat of the refrigerant with heat to the first plate heat exchanger 24 through the first air-conditioning circulation pump 2 and the eleventh control valve 23, and the refrigerant cooled after heat exchange in the first plate heat exchanger 24 transfers the remaining heat to the first evaporator 6 of the first water-cooled chiller 5 through the second control valve 4, and exchanges heat with the refrigerant in the first water-cooled chiller 5, and then transfers the heat of the first evaporator 6 to the first condenser 7 through the internal refrigeration cycle of the first water-cooled chiller 5, and the first evaporator 6 The cooled refrigerant after heat exchange is then transferred back to the air-cooled precision air-conditioning terminal 1, and at the same time, it enters the first plate heat exchanger 24 through the first cooling circulation pump 10 and the thirteenth control valve 26 in sequence. The cooling water heated after heat exchange with the first plate heat exchanger 24 enters the first condenser 7 through the fifth control valve 12. The cooling water heated after heat exchange with the first condenser 7 returns to the cooling tower 9 through the third control valve 8; that is, the refrigeration cycle of the air-cooled precision air-conditioning terminal 1 is: air-cooled precision air-conditioning terminal 1→first air-conditioning circulation pump 2→eleventh control valve 23→first plate heat exchanger 24→second control valve 4→first evaporator 6→air-cooled precision air-conditioning terminal 1; the refrigeration cycle of the cooling tower is: cooling tower 9→first cooling circulation pump 10→thirteenth control valve 26→first plate heat exchanger 24→fifth control valve 12→first condenser 7→third control valve 8→cooling tower 9;

[0113] (4) The fourth working mode, the second water-cooled chiller to the air-cooled precision air conditioner terminal cooling mode:

[0114] Please refer to Figure 7, open the air-cooled precision air-conditioning terminal 1, the third control valve 8, the cooling tower 9, the sixth control valve 13, the second air-conditioning circulation pump 14, the seventh control valve 15, the eighth control valve 16, the second water-cooled chiller 17, the second cooling circulation pump 20, the ninth control valve 21, and the tenth control valve 22; first, the air-cooled precision air-conditioning terminal 1 transfers the heat of the refrigerant with heat to the second evaporator 18 of the second water-cooled chiller 17 through the sixth control valve 13, the second air-conditioning circulation pump 14, the seventh control valve 15, and the eighth control valve 16, and exchanges heat with the refrigerant in the second water-cooled chiller 17, and then transfers the heat of the second evaporator 18 to the second condenser 19 through the internal refrigeration cycle of the second water-cooled chiller 17, and the refrigerant cooled after the heat exchange in the second evaporator 18 is transferred back to the air-cooled The air-cooled precision air-conditioning terminal 1 is connected to the second condenser 19 through the second cooling circulation pump 20, the ninth control valve 21 and the tenth control valve 22, and then returns to the cooling tower 9 after heat exchange with the second condenser 19; that is, the refrigeration cycle of the air-cooled precision air-conditioning terminal 1 is: the air-cooled precision air-conditioning terminal 1→the sixth control valve 13→the second air-conditioning circulation pump 14→the seventh control valve 15→the eighth control valve 16→the second evaporator 18→the air-cooled precision air-conditioning terminal 1; the internal refrigeration cycle of the second water-cooled chiller is: the second evaporator 18→the second compressor 44→the second condenser 19→the second throttling device 45→the second evaporator 18; the refrigeration cycle of the cooling tower is: the cooling tower 9→the second cooling circulation pump 20→the ninth control valve 21→the tenth control valve 22→the second condenser 19→the cooling tower 9;

[0115] (5) The fifth working mode, the second plate heat exchanger for the air-cooled precision air conditioning terminal cooling mode:

[0116] Please refer to Figure 8, open the air-cooled precision air-conditioning terminal 1, cooling tower 9, sixth control valve 13, second air-conditioning circulation pump 14, second cooling circulation pump 20, fifteenth control valve 28, second plate heat exchanger 29, sixteenth control valve 30, seventeenth control valve 31, eighteenth control valve 32; firstly, the air-cooled precision air-conditioning terminal 1 transfers the heat of the refrigerant with heat to the second plate heat exchanger 29 through the sixth control valve 13, the second air-conditioning circulation pump 14, and the fifteenth control valve 28, and the refrigerant cooled after heat exchange in the second plate heat exchanger 29 is then transferred back to the air-cooled precision air-conditioning terminal 1 through the sixteenth control valve 30, and at the same time, the second plate heat exchanger 29 is sequentially transferred to the second plate heat exchanger 29. The cooling water which is heated after heat exchange with the second plate heat exchanger 29 is returned to the cooling tower 9 through the 18th control valve 32; that is, the refrigeration cycle of the air-cooled precision air-conditioning terminal 1 is: the air-cooled precision air-conditioning terminal 1→the sixth control valve 13→the second air-conditioning circulation pump 14→the 15th control valve 28→the second plate heat exchanger 29→the 16th control valve 30→the air-cooled precision air-conditioning terminal 1; the refrigeration cycle of the cooling tower is: the cooling tower 9→the second cooling circulation pump 20→the 17th control valve 31→the second plate heat exchanger 29→the 18th control valve 32→the cooling tower 9;

[0117] (6) The sixth working mode, i.e., the second water-cooled chiller and the second plate heat exchanger are combined to provide a terminal refrigeration mode for air-cooled precision air conditioners:

[0118] Please refer to Fig. 9 , open the air-cooled precision air-conditioning terminal 1, the cooling tower 9, the sixth control valve 13, the second air-conditioning circulation pump 14, the eighth control valve 16, the second water-cooled chiller 17, the second cooling circulation pump 20, the tenth control valve 22, the fifteenth control valve 28, the second plate heat exchanger 29, and the seventeenth control valve 31; first, the air-cooled precision air-conditioning terminal 1 transfers part of the heat of the refrigerant with heat to the second plate heat exchanger 29 through the sixth control valve 13, the second air-conditioning circulation pump 14, and the fifteenth control valve 28, and the refrigerant cooled after heat exchange in the second plate heat exchanger 29 transfers the remaining heat to the second plate heat exchanger 29 through the eighth control valve 16. The second evaporator 18 of the second water-cooled chiller 17 is passed to the second evaporator 18, and heat is exchanged with the refrigerant in the second water-cooled chiller 17. Then, the heat of the second evaporator 18 is transferred to the second condenser 19 through the internal refrigeration cycle of the second water-cooled chiller 17. The coolant cooled by the second evaporator 18 after heat exchange is transferred back to the air-cooled precision air-conditioning terminal 1. At the same time, the cooling water heated by the second plate heat exchanger 29 after heat exchange with the second plate heat exchanger 29 is sequentially entered through the second cooling circulation pump 20 and the seventeenth control valve 31, and then enters the second condenser 19 through the tenth control valve 22, and then returns to the cooling tower 9 after heat exchange with the second condenser 19.

[0119] That is, the refrigeration cycle of the air-cooled precision air-conditioning terminal 1 is: air-cooled precision air-conditioning terminal 1→sixth control valve 13→second air-conditioning circulation pump 14→fifteenth control valve 28→second plate heat exchanger 29→eighth control valve 16→second evaporator 18→air-cooled precision air-conditioning terminal 1; the internal refrigeration cycle of the second water-cooled chiller is: second evaporator 18→second compressor 44→second condenser 19→second throttling device 45→second evaporator 18; the refrigeration cycle of the cooling tower is: cooling tower 9→second cooling circulation pump 20→seventeenth control valve 31→second plate heat exchanger 29→tenth control valve 22→cooling tower 9;

[0120] (7) The seventh working mode, i.e., the second plate heat exchanger is used for the terminal cooling mode of the liquid-cooled precision air conditioner:

[0121] Please refer to Fig.10 , open the cooling tower 9, the second air conditioning circulation pump 14, the second cooling circulation pump 20, the fifteenth control valve 28, the seventeenth control valve 31, the eighteenth control valve 32, the liquid-cooled precision air conditioning terminal 33, the liquid-cooled secondary side heat exchanger 34, and the liquid-cooled secondary side circulation pump 35; first, the liquid-cooled precision air conditioning terminal 33 allows the refrigerant with heat to enter the liquid-cooled secondary side heat exchanger 34, exchange heat with the liquid-cooled secondary side heat exchanger 34, and then cool down and return to the liquid-cooled precision air conditioning terminal 33 through the liquid-cooled secondary side circulation pump 35. At the same time, the liquid cooling The refrigerant on the other side of the secondary heat exchanger 34 is heated up and passes through the twentieth control valve 39, the second air-conditioning circulation pump 14, and the fifteenth control valve 28 to transfer the heat to the second plate heat exchanger 29, and then returns to the liquid-cooled secondary heat exchanger through the twenty-first control valve 40. At the same time, it passes through the second cooling circulation pump 20, the seventeenth control valve 31, and the second plate heat exchanger 29. The heated cooling water after heat exchange with the second plate heat exchanger 29 returns to the cooling tower 9 through the eighteenth control valve 32, and the cooling tower 9 discharges the heat to the outdoor atmosphere. That is, the refrigeration cycle of the liquid-cooled precision air-conditioning terminal 33 is: liquid-cooled precision air-conditioning terminal 33 → liquid-cooled secondary side heat exchanger 34 → liquid-cooled secondary side circulation pump 35 → liquid-cooled precision air-conditioning terminal 33; the refrigeration cycle of the liquid-cooled secondary side heat exchanger is: liquid-cooled secondary side heat exchanger 34 → twentieth control valve 39 → second air-conditioning circulation pump 14 → fifteenth control valve 28 → second plate heat exchanger 29 → twenty-first control valve 40 → liquid-cooled secondary side heat exchanger 34; the refrigeration cycle of the cooling tower is: cooling tower 9 → second cooling circulation pump 20 → seventeenth control valve 31 → second plate heat exchanger 29 → eighteenth control valve 32 → cooling tower 9.

[0122] (8) The eighth working mode, i.e., the liquid-cooled primary side heat exchanger to the liquid-cooled terminal refrigeration mode:

[0123] Please refer to Fig.11, open the cooling tower 9, the first cooling circulation pump 10, the fourth control valve 11, the fourteenth control valve 27, the liquid-cooled precision air conditioning terminal 33, the liquid-cooled secondary side heat exchanger 34, the liquid-cooled secondary side circulation pump 35, the liquid-cooled primary side circulation pump 36, the liquid-cooled primary side heat exchanger 37, and the nineteenth control valve 38; first, the liquid-cooled precision air conditioning terminal 33 allows the refrigerant with heat to enter the liquid-cooled secondary side heat exchanger 34, exchange heat with the liquid-cooled secondary side heat exchanger 34, and then cool down through the liquid-cooled secondary side circulation pump 35 and return to the liquid cooling Type precision air conditioning terminal 33, at the same time, the refrigerant on the other side of the liquid-cooled secondary side heat exchanger 34 is heated up and transfers the heat to the liquid-cooled primary side heat exchanger 37 through the liquid-cooled primary side circulation pump 36 in turn, and then returns to the liquid-cooled secondary side heat exchanger. At the same time, it enters the liquid-cooled primary side heat exchanger 37 through the first cooling circulation pump 10, the fourth control valve 11, the fourteenth control valve 27, and the nineteenth control valve 38 in turn. The heated cooling water after heat exchange with the liquid-cooled primary side heat exchanger 37 returns to the cooling tower 9, and the cooling tower 9 discharges the heat to the outdoor atmosphere.

[0124] That is, the refrigeration cycle of the liquid-cooled precision air-conditioning terminal 33 is: liquid-cooled precision air-conditioning terminal 33 → liquid-cooled secondary side heat exchanger 34 → liquid-cooled secondary side circulation pump 35 → liquid-cooled precision air-conditioning terminal 33; the refrigeration cycle of the liquid-cooled secondary side heat exchanger is: liquid-cooled secondary side heat exchanger 34 → liquid-cooled primary side circulation pump 36 → liquid-cooled primary side heat exchanger 37 → liquid-cooled secondary side heat exchanger 34; the refrigeration cycle of the cooling tower is: cooling tower 9 → first cooling circulation pump 10 → fourth control valve 11 → fourteenth control valve 27 → nineteenth control valve 38 → cooling tower 9;

[0125] (9) The ninth working mode, i.e., the cooling water "three-series" step-by-step cooling mode for the liquid cooling terminal and the air-cooled precision air conditioning terminal:

[0126] Please refer to Fig.12, open the air-cooled precision air-conditioning terminal 1, the first air-conditioning circulation pump 2, the eleventh control valve 23, the second control valve 4, the first water-cooled chiller 5, the third control valve 8, the cooling tower 9, the first cooling circulation pump 10, the fifth control valve 12, the eleventh control valve 23, the twelfth control valve 25, the thirteenth control valve 26, and the fourteenth control valve 27; firstly, the air-cooled precision air-conditioning terminal 1 transfers part of the heat of the refrigerant with heat to the first plate heat exchanger 24 through the first air-conditioning circulation pump 2 and the eleventh control valve 23, and the refrigerant cooled after heat exchange in the first plate heat exchanger 24 transfers the remaining heat to the first water-cooled chiller 5 through the second control valve 4 The first evaporator 6 is connected to the first evaporator 6 and exchanges heat with the refrigerant in the first water-cooled chiller 5. Then, the heat of the first evaporator 6 is transferred to the first condenser 7 through the internal refrigeration cycle of the first water-cooled chiller 5. The coolant cooled after heat exchange in the first evaporator 6 is transferred back to the air-cooled precision air-conditioning terminal 1. At the same time, the cooling water heated up after heat exchange with the first plate heat exchanger 24 is sequentially entered through the first cooling circulation pump 10 and the thirteenth control valve 26. The cooling water heated up after heat exchange with the first plate heat exchanger 24 enters the first condenser 7 through the fifth control valve 12. The cooling water heated up after heat exchange with the first condenser 7 enters the liquid-cooled primary side heat exchanger 37 through the nineteenth control valve 38. After heat exchange with the liquid-cooled secondary water, it returns to the cooling unit 1. Cooling tower 9; at the same time, the liquid-cooled precision air-conditioning terminal 33 will let the refrigerant with heat enter the liquid-cooled secondary side heat exchanger 34, exchange heat with the liquid-cooled secondary side heat exchanger 34, and then cool down through the liquid-cooled secondary side circulation pump 35 and return to the liquid-cooled precision air-conditioning terminal 33. At the same time, the refrigerant on the other side of the liquid-cooled secondary side heat exchanger 34 heats up and transfers the heat to the liquid-cooled primary side heat exchanger 37 through the liquid-cooled primary side circulation pump 36 in turn, and then returns to the liquid-cooled secondary side heat exchanger. That is, the refrigeration cycle of the air-cooled precision air-conditioning terminal 1 is: air-cooled precision air-conditioning terminal 1→first air-conditioning circulation pump 2→eleventh control valve 23→first plate heat exchanger 24→second control valve 4→first evaporator 6→air-cooled Type precision air conditioning terminal 1; the refrigeration cycle of the liquid-cooled secondary side heat exchanger is: liquid-cooled secondary side heat exchanger 34→liquid-cooled primary side circulation pump 36→liquid-cooled primary side heat exchanger 37→liquid-cooled secondary side heat exchanger 34; the refrigeration cycle of the cooling tower is: cooling tower 9→first cooling circulation pump 10→thirteenth control valve 26→first plate heat exchanger 24→fifth control valve 12→first condenser 7→nineteenth control valve 38→liquid-cooled primary side heat exchanger 37→cooling tower 9; the refrigeration cycle of the liquid-cooled precision air conditioning terminal 33 is: liquid-cooled precision air conditioning terminal 33→liquid-cooled secondary side heat exchanger 34→liquid-cooled secondary side circulation pump 35→liquid-cooled precision air conditioning terminal 33;

[0127] The first working mode and the fourth working mode, the seventh working mode and the eighth working mode can be operated simultaneously;

[0128] The second working mode mentioned above can be operated simultaneously with the fifth working mode, the seventh working mode and the eighth working mode;

[0129] The third working mode mentioned above can be operated simultaneously with the sixth working mode, the seventh working mode and the eighth working mode;

[0130] The seventh working mode or the eighth working mode mentioned above can be operated simultaneously with any other mode;

[0131] In actual applications, there is no need to configure all modes. Only the first working mode, the second working mode, the third working mode, the eighth working mode, or only the fourth working mode, the fifth working mode, the sixth working mode, and the seventh working mode can be set according to project characteristics.

[0132] Embodiment 3

[0133] This embodiment is a further improvement on the basis of the first or second embodiment, and the similarities are not repeated here, and only the differences are improved below.

[0134] In this embodiment, the twenty-first control valve 40 and the pipeline where it is located in the first or second embodiment are modified to be connected to the first outlet of the second water-cooled chiller 17; and a control valve is added to the pipeline between the second cooling assembly and the first outlet of the second water-cooled chiller 17, so that when the third heat exchange unit is used to exchange heat with the first cooling assembly, a working mode in which the second plate heat exchanger 29 is connected in series with the second water-cooled chiller 17 can be added. In addition to all the working modes of embodiment 2, a mode in which the second plate heat exchanger 29 is connected in series with the second water-cooled chiller 17 when exchanging heat with the first cooling assembly is added, as well as a combination of this mode with other working modes.

[0135] The above describes in detail the structure, features and effects of the utility model based on the embodiments shown in the drawings. The above is only a preferred embodiment of the utility model, but the utility model is not limited to the scope of implementation shown in the drawings. Any changes made in accordance with the concept of the utility model, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and the drawings, should be within the protection scope of the utility model.

Claims

1. A cooling system, characterized in that: It includes a first cooling assembly, a second cooling assembly, a third cooling assembly, a first heat exchange unit, a second heat exchange unit and a third heat exchange unit; A first heat exchange circuit is provided between the first cooling assembly and the second cooling assembly; The first heat exchange unit is connected to the first cooling assembly to form a second heat exchange loop; the first heat exchange unit is connected to the third cooling assembly to form a third heat exchange loop; The second heat exchange unit is connected to the second cooling assembly to form a fourth heat exchange loop; the second heat exchange unit is connected to the third cooling assembly to form a fifth heat exchange loop; the second heat exchange unit includes a first water-cooled chiller (5); The third heat exchange unit is connected to the second cooling assembly to form a sixth heat exchange loop; the third heat exchange unit is connected to the third cooling assembly to form a seventh heat exchange loop; The third heat exchange unit is connected to the first cooling assembly to form an eighth heat exchange loop.

2. The cooling system according to claim 1, characterized in that: The first heat exchange unit comprises a liquid-cooled primary-side circulation pump (36), a liquid-cooled primary-side heat exchanger (37), a third control valve (8), a nineteenth control valve (38) and a twenty-second control valve (41); The liquid-cooled primary side circulation pump (36) is in communication with the first inlet of the liquid-cooled primary side heat exchanger (37); the first outlet of the liquid-cooled primary side heat exchanger (37) is in communication with the first cooling component; the twenty-second control valve (41) is arranged on a pipeline connecting the first inlet of the liquid-cooled primary side heat exchanger (37) and the first outlet of the liquid-cooled primary side heat exchanger (37); The second outlet of the liquid-cooled primary-side heat exchanger (37) can be communicated with the third cooling component, and the second inlet of the liquid-cooled primary-side heat exchanger (37) can be communicated with the third cooling component; The nineteenth control valve (38) is connected to the second inlet of the liquid-cooled primary-side heat exchanger (37), and the third control valve (8) is installed on the pipeline connecting the inlet end of the nineteenth control valve (38) and the second outlet of the liquid-cooled primary-side heat exchanger (37).

3. The cooling system according to claim 2, characterized in that: The second heat exchange unit further comprises a first plate heat exchanger (24), a first air conditioning circulation pump (2) and a first cooling circulation pump (10); The second cooling component, the first air-conditioning circulation pump (2), the first inlet of the first plate heat exchanger (24), the first outlet of the first plate heat exchanger (24), the first inlet of the first water-cooled chiller (5), and the first outlet of the first water-cooled chiller (5) are connected in series in sequence; An eleventh control valve (23) is provided at the first inlet of the first plate heat exchanger (24); a second control valve (4) is provided at the first inlet of the first water-cooled chiller (5); A first bypass pipeline is provided between the first inlet of the first plate heat exchanger (24) and the first outlet of the first plate heat exchanger (24), and a first control valve (3) is provided on the first bypass pipeline; A second bypass pipeline is provided between the first inlet of the first water-cooled chiller (5) and the first outlet of the first water-cooled chiller (5); a twelfth control valve (25) is provided on the second bypass pipeline; The third cooling component, the first cooling circulation pump (10), the second inlet of the first plate heat exchanger (24), the second outlet of the first plate heat exchanger (24), the second inlet of the first water-cooled chiller (5), and the second outlet of the first water-cooled chiller (5) are connected in series in sequence; A thirteenth control valve (26) is provided at the second inlet of the first plate heat exchanger (24); a fifth control valve (12) is provided at the second inlet of the first water-cooled chiller (5); A third bypass pipeline and a fourth control valve (11) for controlling the on-off of the third bypass pipeline are provided between the second inlet of the first plate heat exchanger (24) and the second outlet of the first plate heat exchanger (24); A fourth bypass pipeline and a fourteenth control valve (27) for controlling the on-off of the fourth bypass pipeline are provided between the second inlet of the first water-cooled chiller (5) and the second outlet of the first water-cooled chiller (5).

4. The cooling system according to claim 3, characterized in that: The fourteenth control valve (27) is connected to the third control valve (8) via a pipeline, so that the fourth control valve (11), the fourteenth control valve (27) and the third control valve (8) can be connected in series.

5. The cooling system according to claim 3, characterized in that: The first water-cooled chiller (5) comprises a first compressor, a first condenser (7), a first throttling device and a first evaporator (6) which are connected in series end to end.

6. The cooling system according to any one of claims 1 to 5, characterized in that: The third heat exchange unit comprises a second plate heat exchanger (29), a second water-cooled chiller (17), a second air conditioning circulation pump (14) and a second cooling circulation pump (20); The first cooling component, the second air-conditioning circulation pump (14), the first inlet of the second plate heat exchanger (29), the first outlet of the second plate heat exchanger (29), the first inlet of the second water-cooled chiller (17) and the first outlet of the second water-cooled chiller (17) are connected in series in sequence; A fifteenth control valve (28) is installed at the first outlet of the second plate heat exchanger (29), and an eighth control valve (16) is installed at the first inlet of the second water-cooled chiller (17); A fifth bypass pipeline is provided between the first inlet of the second plate heat exchanger (29) and the first outlet of the second plate heat exchanger (29), and a seventh control valve (15) is installed on the fifth bypass pipeline; A sixth bypass pipeline is provided between the first inlet of the second water-cooled chiller (17) and the first outlet of the second water-cooled chiller (17), and a sixteenth control valve (30) is installed on the sixth bypass pipeline; The third cooling component, the second cooling circulation pump (20), the second inlet of the second plate heat exchanger (29), the second outlet of the second plate heat exchanger (29), the second inlet of the second water-cooled chiller (17) and the second outlet of the second water-cooled chiller (17) are connected in series in sequence; A seventeenth control valve (31) is installed at the second inlet of the second plate heat exchanger (29), a seventh bypass pipeline is provided between the second inlet of the second plate heat exchanger (29) and the second outlet of the second plate heat exchanger (29), and a ninth control valve (21) is installed on the seventh bypass pipeline; A tenth control valve (22) is installed at the second inlet of the second water-cooled chiller (17); an eighth bypass pipeline is provided between the second inlet of the second water-cooled chiller (17) and the second outlet of the second water-cooled chiller (17), and an eighteenth control valve (32) is provided on the eighth bypass pipeline.

7. The cooling system according to claim 6, characterized in that: A twentieth control valve (39) is provided on the pipeline connecting the first cooling assembly and the second air-conditioning circulation pump (14); The second air-conditioning circulation pump (14) is in communication with the second cooling assembly via a pipeline; a sixth control valve (13) is provided on the pipeline connecting the second air-conditioning circulation pump (14) and the second cooling assembly.

8. The cooling system according to claim 6, characterized in that: A pipeline connecting the first outlet of the second plate heat exchanger (29) and the first inlet of the second water-cooled chiller (17) is connected to the first cooling component via a return pipe; a twenty-first control valve (40) is provided on the return pipe.

9. The cooling system according to claim 6, characterized in that: The second water-cooled chiller (17) comprises a second compressor (44), a second condenser (19), a second throttling device (45) and a second evaporator (18) which are connected in series end to end.

10. The cooling system according to any one of claims 1 to 5, characterized in that: The third cooling assembly includes at least two cooling towers.

Images