CN108224631B - Data center emergency refrigeration system and control method thereof - Google Patents
Data center emergency refrigeration system and control method thereof Download PDFInfo
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- CN108224631B CN108224631B CN201711445793.8A CN201711445793A CN108224631B CN 108224631 B CN108224631 B CN 108224631B CN 201711445793 A CN201711445793 A CN 201711445793A CN 108224631 B CN108224631 B CN 108224631B
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 282
- 238000009825 accumulation Methods 0.000 claims abstract description 128
- 239000000498 cooling water Substances 0.000 claims abstract description 96
- 239000003507 refrigerant Substances 0.000 claims abstract description 90
- 238000001816 cooling Methods 0.000 claims abstract description 64
- 238000001514 detection method Methods 0.000 claims description 15
- 230000000630 rising effect Effects 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 9
- 230000007547 defect Effects 0.000 abstract description 3
- 238000007710 freezing Methods 0.000 description 13
- 230000008014 freezing Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 239000008400 supply water Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000013468 resource allocation Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to a data center emergency refrigeration system and a control method thereof, wherein the data center emergency refrigeration system is simultaneously provided with a cooling water system capable of providing cooling water and a cold accumulation system capable of providing chilled water, and when the outdoor temperature is higher, the cold accumulation system with lower water temperature can be used for providing the chilled water for a water-cooled condenser so as to accelerate the cooling speed of a refrigerant and realize emergency refrigeration; when the outdoor temperature is low, cooling water is provided for the water-cooled condenser only through the cooling water system so as to cool the refrigerant, namely, a natural cold source is utilized to provide refrigeration for the data center, and the cold accumulation system is prevented from being continuously used when the temperature is low, so that the energy is effectively saved, and the defects that the traditional refrigeration scheme needs uninterrupted cold accumulation and is not energy-saving are overcome. Compared with the traditional refrigeration scheme, the invention realizes emergency refrigeration without entering a data center machine room by arranging the chilled water or the cooling water in the outdoor unit part.
Description
Technical Field
The invention relates to the technical field of data center thermal management, in particular to a data center emergency refrigeration system and a control method thereof.
Background
In recent years, data centers are developed very rapidly, development directions tend to be large-scale and modularized, and how to reduce heat treatment energy consumption is the core of technical development. Under the background, various modularized data center solutions for reducing heat treatment energy consumption by utilizing natural cooling are promoted, wherein one of the solutions is an evaporative water-cooling data center refrigerant pump refrigeration scheme, and the solution can replace a water-cooling water chilling unit or an air-cooling water chilling unit and an indoor chilled water tail end commonly used in the current medium-large data center in terms of energy conservation and convenience.
The data center is divided into safety levels, and the data center can be kept to be refrigerated when the data center is required to be powered off and switched over in a short time at a higher safety level, so that the servers can effectively dissipate heat, and downtime is avoided.
The traditional water cooling water chilling unit or air cooling water chilling unit + indoor chilled water terminal scheme has a corresponding water storage emergency refrigeration scheme for a high-safety-level data center. The general scheme is that a cold storage water tank is added in a cold storage system, chilled water is injected into the cold storage water tank on a daily basis, and the stored chilled water is started for emergency refrigeration after a host is powered off. However, this conventional refrigeration scheme requires continuous cold storage, and has the disadvantage of no energy saving.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide an emergency refrigeration system for a data center and a control method thereof, aiming at the above-mentioned defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the emergency refrigeration system of the data center is constructed and characterized by comprising a controller, an outdoor temperature detection device for detecting outdoor temperature, an outdoor unit and an indoor unit connected with the outdoor unit, wherein the controller is respectively connected with the outdoor unit and the indoor unit and controls the working mode of the outdoor unit and/or the indoor unit according to the outdoor temperature;
the outdoor unit comprises a water supply system for water circulation, a refrigerant pressurizing unit for refrigerant circulation and a water-cooled condenser for heat exchange between the water circulation loop and the refrigerant circulation loop;
the water supply system comprises a cooling water system which is connected with the water-cooled condenser and provides cooling water for the water-cooled condenser, and a cold storage system which is connected with the water-cooled condenser and provides chilled water for the water-cooled condenser, wherein the temperature of the chilled water is lower than that of the cooling water;
the refrigerant pressurizing unit is connected with the water-cooled condenser and the indoor unit and conveys the refrigerant to the indoor unit;
the outdoor temperature detection device detects outdoor temperature and sends outdoor temperature information to the controller, and the controller processes the outdoor temperature information and controls working states of the cold accumulation system and the cooling water system according to a processing result.
Preferably, the cold accumulation system comprises a cold accumulation water chilling unit for processing water into chilled water, a cold accumulation water pump, a cold accumulation tank for storing the chilled water and a chilled water pump for delivering the chilled water in the cold accumulation tank to the water-cooled condenser;
the water outlet end of the cold accumulation water chilling unit is connected with the water inlet end of the cold accumulation tank, the water outlet end of the cold accumulation tank is connected with the water inlet end of the cold accumulation water chilling unit, and the cold accumulation water pump is arranged between the water outlet end of the cold accumulation water chilling unit and the water inlet end of the cold accumulation tank;
the water outlet end of the cold accumulation tank is further connected with the water inlet end of the water-cooled condenser, the water outlet end of the water-cooled condenser is connected with the water inlet end of the cold accumulation tank, and the chilled water pump is arranged between the water outlet end of the cold accumulation tank and the water inlet end of the water-cooled condenser.
Preferably, the cold accumulation tank is provided with an automatic drain valve; the cold accumulation system also comprises a cold accumulation controller connected with the automatic water drain valve and a temperature detection device connected with the cold accumulation controller and used for detecting the temperature of the chilled water in the cold accumulation tank;
the temperature detection device detects the temperature of the chilled water in the cold accumulation tank and sends chilled water temperature information to the cold accumulation controller, the cold accumulation controller processes the chilled water temperature information and judges whether the automatic water drain valve needs to be controlled to be opened to drain the chilled water in the cold accumulation tank according to a processing result.
Preferably, the cold accumulation system further comprises an emergency water replenishing device for supplying water to the cold accumulation tank, and the emergency water replenishing device is connected with the cold accumulation water pump after being connected in parallel with the cold accumulation water chilling unit.
Preferably, the cooling water system comprises a cooling tower for cooling water and a cooling water pump for sending the cooling water in the cooling tower to the water-cooled condenser;
the water outlet end of the cooling tower is connected with the water inlet end of the water-cooled condenser, the water outlet end of the water-cooled condenser is connected with the water inlet end of the cooling tower, and the cooling water pump is arranged between the water outlet end of the cooling tower and the water inlet end of the water-cooled condenser.
Preferably, a plurality of cooling water systems are arranged, and the cold accumulation systems and the cooling water systems are arranged in parallel; and/or
The water-cooled condenser is equipped with a plurality ofly, it is a plurality of the water-cooled condenser sets up in parallel.
Preferably, the data center emergency cooling system further comprises a power supply for supplying power to the data center emergency cooling system, and the power supply comprises a mains supply and a standby power supply.
The invention also provides a control method of the data center emergency refrigeration system, which is applied to the data center emergency refrigeration system and is characterized by comprising the following steps of:
s1, comparing the detected outdoor temperature with a first preset temperature and a second preset temperature, and judging whether the outdoor temperature is in a temperature rising process or a temperature reducing process;
s2, controlling the cold accumulation system to stop cold accumulation when the outdoor temperature is less than or equal to the first preset temperature; starting a standby power supply to supply power under the condition of mains supply interruption, and controlling a cooling water system to provide cooling water for a water-cooled condenser;
s3, when the outdoor temperature is in a temperature rising process and the outdoor temperature is greater than the first preset temperature and less than or equal to the second preset temperature, keeping the cold accumulation system in a cold accumulation stopping state;
s4, controlling the cold accumulation system to start cold accumulation when the outdoor temperature is higher than the second preset temperature; starting a standby power supply to supply power under the condition of mains supply interruption, and controlling the cold accumulation system to provide chilled water for the water-cooled condenser;
s5, when the outdoor temperature is in the cooling process, the outdoor temperature is higher than the first preset temperature and lower than or equal to the second preset temperature, the cold accumulation system is kept in the state of providing chilled water for the water-cooled condenser.
Preferably, in step S4, after controlling the cold storage system to start cold storage, the method further includes:
and judging whether the mains supply is interrupted or not, and controlling the cold accumulation system to maintain the temperature of the chilled water within a preset temperature range under the condition that the mains supply is not interrupted.
Preferably, the control method further includes:
and when the outdoor temperature is lower than the first preset temperature and the temperature of the chilled water is lower than a third preset temperature, the chilled water in the cold accumulation system is emptied by the cold accumulation system.
The implementation of the data center emergency refrigeration system and the control method thereof has the following beneficial effects: the emergency refrigeration system of the data center is provided with the cooling water system capable of providing cooling water and the cold accumulation system capable of providing chilled water at the same time, and when the outdoor temperature is high, the cold accumulation system with lower water temperature can be used for providing chilled water for the water-cooled condenser, so that the cooling speed of a refrigerant is accelerated, and emergency refrigeration is realized; when the outdoor temperature is low, the cooling water is provided for the water-cooled condenser only through the cooling water system so as to cool the refrigerant, namely, a natural cold source is utilized to provide refrigeration for the data center, and the cold accumulation system is prevented from being continuously used when the temperature is low, so that the energy is effectively saved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of the configuration of a data center emergency refrigeration system of the present invention;
FIG. 2 is a partial schematic view of some embodiments of a data center emergency refrigeration system of the present invention;
FIG. 3 is a detailed schematic diagram of the data center emergency refrigeration system of FIG. 2;
fig. 4 is a schematic diagram of the refrigerant circulation circuit in the emergency refrigeration system of the data center of the present invention.
FIG. 5 is a flow chart of a method of controlling a data center emergency refrigeration system of the present invention;
fig. 6 is a block flow diagram of some embodiments of a method of controlling an emergency refrigeration system of a data center of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the emergency refrigeration system for data center of the present invention includes a controller 1, an outdoor temperature detection device 2, an outdoor unit 100, and an indoor unit 200 connected to the outdoor unit 100, wherein the controller 1 is connected to the outdoor unit 100 and the indoor unit 200, respectively, and controls the working mode of the outdoor unit 100 and/or the indoor unit 200 according to the outdoor temperature; the outdoor unit 100 includes a water supply system 110 for water circulation, a refrigerant pressurizing unit 130 for refrigerant circulation, and a water-cooled condenser 120 for heat exchange between the water circulation circuit and the refrigerant circulation circuit; the water supply system 110 comprises a cooling water system 112 connected with the water-cooled condenser 120 and providing cooling water for the water-cooled condenser 120, and a cold storage system 111 connected with the water-cooled condenser 120 and providing chilled water for the water-cooled condenser 120, wherein the temperature of the chilled water is lower than that of the cooling water, the outdoor temperature detection device 2 detects the outdoor temperature and sends outdoor temperature information to the controller 1, the controller 1 processes the outdoor temperature information, and controls the working states of the cold storage system 111 and the cooling water system 112 according to the processing result; the refrigerant pressurizing unit 130 connects the water-cooled condenser 120 and the indoor unit 200, and delivers the refrigerant to the indoor unit 200.
Wherein, the process of the controller 1 controlling the working states of the cold storage system 111 and the cooling water system 112 is as follows: the controller 1 compares the outdoor temperature detected by the outdoor temperature detection device 2 with a first preset temperature and a second preset temperature, and judges whether the outdoor temperature is in a temperature rising process or a temperature lowering process; when the outdoor temperature is less than or equal to a first preset temperature, the controller 1 controls the cold accumulation system 111 to stop cold accumulation, and starts the standby power supply to supply power under the condition of mains supply interruption, and the controller 1 controls the cooling water system 112 to provide cooling water for the water-cooled condenser 120; when the outdoor temperature is in the temperature rising process and the outdoor temperature is greater than the first preset temperature and less than or equal to the second preset temperature, the controller 1 controls the cold accumulation system to keep in a cold accumulation stopping state; when the outdoor temperature is higher than a second preset temperature, the controller 1 controls the cold accumulation system 111 to start cold accumulation, the standby power supply is started to supply power under the condition that the mains supply is interrupted, the controller 1 controls the cold accumulation system 111 to provide chilled water for the water-cooled condenser 120, and the controller 1 controls the cold accumulation system 111 to maintain the temperature of the chilled water within a preset temperature range under the condition that the mains supply is not interrupted; when the outdoor temperature is in the cooling process and the outdoor temperature is greater than the first preset temperature and less than or equal to the second preset temperature, the controller 1 controls the cold storage system 111 to be in the state of providing chilled water for the water-cooled condenser 120.
Specifically, the emergency cooling system of the data center includes an outdoor unit 100 disposed outdoors and an indoor unit 200 disposed indoors. The outdoor unit 100 and the indoor unit 200 are connected to each other to perform cooling of the data center room. It is understood that the outdoor unit 100 includes some or all of the devices of the water circulation circuit and some of the devices of the refrigerant circulation circuit, and heat exchange between the water circulation circuit and the refrigerant circulation circuit is performed through the water-cooled condenser 120. As shown in fig. 1, the water-cooled condenser 120 includes two heat exchanging portions for exchanging heat, i.e., a first heat exchanging portion 121 and a second heat exchanging portion 122. The first heat exchanging part 121 is disposed in the water circulation circuit, the second heat exchanging part 122 is disposed in the refrigerant circulation system, the cold storage system 111 is connected to the first heat exchanging part 121 and delivers chilled water to the first heat exchanging part 121, the cooling water system 112 is connected to the first heat exchanging part 121 and delivers cooling water to the first heat exchanging part 121, and the refrigerant pressurizing unit 130 is connected to the second heat exchanging part 122 and the indoor unit 200 and delivers the refrigerant, which is cooled by the second heat exchanging part 122, to the indoor unit 200. The first heat exchanging portion 121 exchanges heat with the refrigerant in the second heat exchanging portion 122 by the cooling water supplied from the cooling water system 112 or the chilled water supplied from the cold storage system 111, thereby cooling the refrigerant. The cooled refrigerant enters the indoor unit 200 through the refrigerant pressurizing unit 130, and the final indoor cooling is completed. The shape of the heat exchanging part can be designed according to needs, and the heat exchanging part is generally a pipeline with various shapes. The water-cooled condenser 120 may be any type of plate heat exchanger, such as a double pipe, a shell and tube, and the like.
As shown in fig. 3, the cold storage system 111 includes a cold storage water chiller 1111, a cold storage tank 1112, a chilled water pump 1113, and a cold storage water pump 1114, where the cold storage water chiller 1111 is configured to process water into chilled water, the cold storage tank 1112 is configured to store chilled water, the chilled water pump 1113 is configured to send chilled water in the cold storage tank 1112 to the water-cooled condenser 120, and the cold storage water pump 1114 is configured to send chilled water processed by the cold storage water chiller 1111 into the cold storage tank 1112. Specifically, the water outlet end of the cold storage water chilling unit 1111 is connected with the water inlet end of the cold storage tank 1112, the water outlet end of the cold storage tank 1112 is connected with the water inlet end of the cold storage water chilling unit 1111, the cold storage water pump 1114 is arranged between the water outlet end of the cold storage water chilling unit 1111 and the water inlet end of the cold storage tank 1112, and a closed circulation loop is formed between the cold storage water chilling unit 1111 and the cold storage tank 1112. When the temperature of water in the cold accumulation tank 1112 is higher than the preset chilled water temperature, the water in the cold accumulation tank 1112 returns to the cold accumulation water chilling unit 1111 to be processed into chilled water meeting the requirement, and the chilled water flows out of the cold accumulation water chilling unit 1111 and is sent into the cold accumulation tank 1112 through the cold accumulation pump. The chilled water is lower in temperature and better in cooling effect, and when the outdoor temperature is higher, the chilled water is provided for the water circulation of the refrigeration system by using the cold storage system 111, so that the cooling is quicker.
In order to prevent the cold storage tank 1112 from freezing at a low temperature outdoors, an anti-freezing measure needs to be added to the cold storage tank 1112 to stop the cold storage. The anti-freezing measures can include two modes, namely: a drain valve for draining water is arranged at the bottom of the cold accumulation tank 1112, and when the outdoor temperature is lower than a certain value, personnel can drain water manually to avoid freezing; the second method comprises the following steps: and adding a self-control drainage mode, and opening an automatic drain valve to drain water and prevent freezing of the cold accumulation tank 1112 when the outdoor temperature is lower than a certain value through a control system. As for the second mode, specifically, the cold storage tank 1112 is provided with an automatic drain valve, and the cold storage system further includes a cold storage controller and a temperature detection device. The cold accumulation controller is connected with the automatic water drain valve; the temperature detection device is connected to the cold storage controller and is used for detecting the temperature of the chilled water in the cold storage tank 1112. Specifically, the temperature detection device detects the temperature of the chilled water in the cold storage tank 1112 and sends the temperature information of the chilled water to the cold storage controller, the cold storage controller processes the temperature information of the chilled water and judges whether the automatic drain valve needs to be controlled to be opened to drain the chilled water in the cold storage tank 1112 according to a processing result, and when the outdoor temperature is lower than a certain value, the cold storage controller controls the automatic drain valve to be opened to drain the cold storage tank 1112 and prevent freezing. For example, the temperature detection means may be a temperature sensor. Similarly, the outdoor temperature sensor may also be a temperature sensor.
Further, the water outlet end of the cold storage tank 1112 is further connected with the water inlet end of the water-cooled condenser 120, the freezing water pump 1113 is arranged between the water outlet end of the cold storage tank 1112 and the water inlet end of the water-cooled condenser 120, the water outlet end of the water-cooled condenser 120 is connected with the water inlet end of the cold storage tank 1112, and a closed water circulation loop is formed between the cold storage tank 1112 and the water-cooled condenser 120: the chilled water flows out of the cold storage tank 1112, is sent into the first heat exchanging part 121 of the water-cooled condenser 120 through the chilled water pump 1113, the water temperature of the first heat exchanging part 121 of the water-cooled condenser 120 is increased after heat exchange, and the water with the increased water temperature flows back to the cold storage tank 1112. As shown in fig. 3, the inlet and outlet of the chilled water are added at the water inlet and outlet of the water-cooled condenser 120 of the outdoor unit 100 module, so that the chilled water of the cold storage system 111 can be input into the water-cooled condenser 120 to achieve the effect of refrigerating by the refrigerant pump 132 when there is an emergency demand. As shown in fig. 3, the cold storage system 111 further includes an emergency water replenishing device 1115 for supplying water to the cold storage tank 1112, and the emergency water replenishing device 1115 and the cold storage water chiller 1111 are connected in parallel and then connected to the cold storage water pump 1114. When the amount of water in the cold storage tank 1112 is insufficient due to evaporation or micro leakage and emergency water replenishment is required, the cold storage tank 1112 may be replenished with water by the emergency water replenishment device 1115. Of course, the emergency water replenishing device 1115 may provide the initial water storage amount for the cold storage tank 1112, and is not limited to emergency water replenishing.
As shown in fig. 3, in the emergency cooling system for a data center of the present invention, the cooling water system 112 may include a cooling tower 1121 and a cooling water pump 1122, wherein the cooling tower 1121 is used for storing cooling water, and the cooling water pump 1122 is used for sending the cooling water in the cooling tower 1121 to the water-cooled condenser 120. Preferably, the cooling water pump 1122 of the cooling water system 112 and the chilled water pump 1113 of the cold storage system 111 are the same water pump. The water outlet end of the cooling tower 1121 is connected to the water inlet end of the water-cooled condenser 120, the water outlet end of the water-cooled condenser 120 is connected to the water inlet end of the cooling tower 1121, the cooling water pump 1122 is arranged between the water outlet end of the cooling tower 1121 and the water inlet end of the water-cooled condenser 120, and a closed water circulation loop is formed between the cooling tower 1121 and the water-cooled condenser 120: after cooling the water by the cooling tower 1121, the cooling water is sent to the water-cooled condenser 120 by the cooling water pump 1122; in the first heat exchanging portion 121 of the water-cooled condenser 120, the cooling water cools the refrigerant in the second heat exchanging portion 122 through heat exchange, and the original cooling water is cooled by increasing the temperature after heat exchange, and then flows back to the cooling tower 1121 for cooling. After the temperature of the refrigerant is reduced, the refrigerant enters the indoor unit 200 through the refrigerant pressurizing unit 130, and the final indoor temperature reduction is completed.
As shown in fig. 2 and 3, in an embodiment of the emergency cooling system of the data center of the present invention, a plurality of cooling water systems 112 are provided, and the cold storage system 111 and the cooling water systems 112 are arranged in parallel; and/or a plurality of water-cooled condensers 120 are arranged, and the plurality of water-cooled condensers 120 are arranged in parallel. The one or more water cooled condensers 120 may be collectively supplied with cooling water by a plurality of cooling water systems 112 connected in parallel. It is understood that one cooling water system 112 may supply water to a plurality of water cooled condensers 120, or a plurality of cooling water systems 112 may supply water to one water cooled condenser 120. Through the parallel arrangement, the backup of the cooling water system 112 or the water-cooled condenser 120 in the refrigeration system can be realized, and the fault probability of the whole system is reduced. Similarly, one cold storage system 111 may supply water to a plurality of water-cooled condensers 120, or one cold storage system 111 may supply water to one water-cooled condenser 120. Preferably, as shown in fig. 2, the water outlet end of the cold accumulation system 111 and the water outlet ends of all the cooling water systems 112 are connected with the water inlet ends of all the water-cooled condensers 120 through a first pipe 301; the water inlet ends of all the cooling water systems 112 and the water inlet ends of the cold accumulation systems 111 are connected with the water outlet ends of all the water-cooled condensers 120 through second pipelines 302.
Specifically, as shown in fig. 3, the water outlet ends of the cold storage tanks 1112 and the water outlet ends of the cooling towers 1121 which are connected in parallel are connected with the water inlet ends of the water-cooled condensers 120 which are connected in parallel through a main pipe, i.e. the first pipe 301, which is connected end to end, and it can be understood that the main pipe is closed, and a plurality of interfaces are left on the side wall of the main pipe and are respectively connected with the water outlet ends of the cold storage tanks 1112, the water outlet ends of the cooling towers 1121 and the water inlet ends of the water-cooled condensers 120. More specifically, the connection mode may be a plurality of branch pipes, so that water flowing out of the cold storage tank 1112 or the plurality of cooling towers 1121 enters the main pipe through the branch pipes, flows in the main pipe, and then enters the water-cooled condenser 120 through the corresponding branch pipes. The water inlet ends of the cooling towers 1121 and the water outlet ends of the water-cooled condensers 120 connected in parallel and the water outlet end of the cold accumulation tank 1112 are connected through a main pipe, i.e. the second pipe 302, which is connected end to end, it can be understood that the main pipe is closed, and a plurality of interfaces are left on the side wall of the main pipe and are respectively connected with the water inlet end of the cold accumulation tank 1112, the water inlet end of the cooling tower 1121 and the water outlet end of the water-cooled condenser 120. More specifically, the connection mode may be a plurality of branch pipes, such that water flowing out of the plurality of water-cooled condensers 120 enters the main pipe through the branch pipes, flows in the main pipe, and then enters the cooling tower 1121 or the cold accumulation tank 1112 through the corresponding branch pipes. In this connection manner, the cooling water of the plurality of cooling water systems 112 connected in parallel is shared, so that the backup of the source of the cooling water of the water-cooled condenser 120, that is, the mutual backup of the cooling water systems 112 is realized, the probability of the failure of the whole system is reduced, and the reliability of the system is improved. The number of the cooling systems and the water-cooled condensers 120 can be reasonably configured according to the needs, so that the utilization efficiency of cooling water can be improved, and the reasonable use of resources can be improved. It can be understood that the water in the first pipeline 301 is cold water, a cold water pipe is adopted, the water in the second pipeline 302 is hot water, a hot water pipe is adopted, the hot water pipe is respectively arranged at a proper position, and the resource allocation is conveniently and reasonably carried out by adopting a proper material.
As shown in fig. 4, the refrigerant pressurizing unit 130 includes a receiver tank 131 for storing refrigerant, which is a conventional refrigerant in the related art, and a refrigerant pump 132 for pressurizing the refrigerant. For example, the refrigerant is fluorine, and the refrigerant pump 132 is a fluorine pump. The indoor unit 200 includes an evaporator 210 and a compressor 220, and the water-cooled condenser 120, the liquid storage tank 131, the refrigerant pump 132, the evaporator 210 and the compressor 220 are connected in sequence to form a refrigerant circulation circuit. Specifically, a refrigerant outlet of the evaporator 210 is connected to a refrigerant inlet of the water-cooled condenser 120, a refrigerant outlet of the water-cooled condenser 120 is connected to an inlet of the liquid storage tank 131, an outlet of the liquid storage tank 131 is connected to an inlet of the refrigerant pump 132, and an outlet of the refrigerant pump 132 is connected to a refrigerant inlet of the evaporator 210. Preferably, the outdoor unit 100 further includes a dry filter 133, and the dry filter 133 is disposed between the outlet of the refrigerant pump 132 and the refrigerant inlet of the evaporator 210 to remove impurities and moisture.
Further, the outdoor unit 100 is further provided with a refrigerant pump bypass pipe 140 and a compressor bypass pipe 230, the refrigerant pump bypass pipe 140 is connected in parallel with the refrigerant pump 132, and the compressor bypass pipe 230 is connected in parallel with the compressor 220. Specifically, an inlet of the refrigerant pump bypass pipe 140 is connected to an outlet of the accumulator 131, an outlet of the refrigerant pump bypass pipe 140 is connected to a refrigerant inlet of the evaporator 210, and the refrigerant pump bypass pipe 140 is provided with the bypass check valve 10. An inlet of the compressor bypass pipe 230 is connected to a refrigerant outlet of the evaporator 210, an outlet of the compressor bypass pipe 230 is connected to a refrigerant inlet of the water-cooled condenser 120, and a bypass check valve 10 is provided on the refrigerant pump bypass pipe 140.
The refrigerant circulation circuit can have two circulation modes: a compressor power mode and a pump power mode. Referring to fig. 4, the compressor power modes are: the refrigerant flows into the liquid storage tank 131 after being cooled by the water-cooled condenser 120, flows out of the liquid storage tank 131, enters the evaporator 210 of the indoor unit 200 through the refrigerant pump bypass pipe 140 for evaporation and refrigeration, then flows out of the evaporator 210, enters the compressor 220, is compressed by the compressor 220, and then enters the water-cooled condenser 120 for cooling, so that circulation is formed.
The pump power mode is as follows: the refrigerant flows into the liquid storage tank 131 after being cooled by the water-cooled condenser 120, is pressurized by the refrigerant pump 132 after exiting the liquid storage tank 131, enters the evaporator 210 of the indoor unit 200 for evaporation and refrigeration, and then exits from the evaporator 210 and enters the water-cooled condenser 120 through the compressor bypass pipe 230 for cooling, thereby forming a cycle. In the pump power mode, the compressor 220 does not operate, and at this time, the compressor 220 serves as a partition device, so that the refrigerant from the evaporator 210 does not pass through the compressor 220, but only passes through the compressor bypass pipe 230, and then enters the water-cooled condenser 120 on the outdoor side to exchange heat and cool.
In the preferred embodiment of the data center emergency refrigeration system of the present invention, a dual power supply design is further provided for the cooling tower 1121, the cooling water pump 1122, the cold storage water pump 1114, the cold storage water chilling unit 1111, the refrigerant pump 132, the indoor unit 200 fan, etc., and the system can be automatically switched to a standby power supply when one power supply is abnormal or interrupted, so as to ensure that the system supplies power normally. Specifically, the data center emergency refrigeration system further comprises a power supply for supplying power to the data center emergency refrigeration system, the power supply comprises a mains supply and a standby power supply, and when the mains supply is disconnected, the power supply can be automatically switched to the standby power supply and is powered by the standby power supply, so that the system is ensured to be normally powered. For example, the backup Power source may be a UPS (Uninterruptible Power System/Uninterruptible Power Supply), i.e., an Uninterruptible Power source).
The implementation process of the emergency refrigeration system of the data center is as follows: when the outdoor temperature is high, the cold storage water chilling unit 1111 of the cold storage system 111 is started to inject chilled water into the cold storage tank 1112 and maintain the chilled water in the cold storage tank 1112 in a set temperature range, when the commercial power of the data center is interrupted and other abnormal conditions happen, the compressor 220 cannot be used for refrigeration, the chilled water pump 1113 of the cold storage system 111 is started, the chilled water with a lower temperature is input into the refrigerant-water heat exchanger, namely the water-cooled condenser 120, the refrigerant pump 132 is started, the cooled refrigerant is conveyed to the indoor unit 200 for refrigeration, the purpose that the data center is refrigerated uninterruptedly is achieved, and emergency refrigeration is achieved. When the outdoor temperature is lower than a certain value, the cold storage system 111 does not need to be started for chilled water cold storage, when the commercial power of the data center is interrupted and other abnormal conditions occur, the cooling tower 1121 with smaller power is continuously switched through dual power supply control, the cooling water pump 1122, the refrigerant pump 132 and the indoor unit 200 continuously supply power, the cooling water pump 1122 of the cooling water system 112 is started, the cooling water in the cooling tower 1121 is input into the water-cooled condenser 120, the refrigerant pump 132 is started, the cooled refrigerant is conveyed to the indoor unit 200 for refrigeration, emergency refrigeration is continuously provided for the data center by utilizing a natural cold source, uninterrupted refrigeration of the data center is achieved, the situation that the cold storage system 111 is continuously used for emergency when the temperature is lower is avoided, and therefore energy is effectively saved.
The invention also discloses a control method of the data center emergency refrigeration system, which is applied to the data center emergency refrigeration system. As shown in fig. 5, the control method includes the steps of:
and S1, comparing the detected outdoor temperature with the first preset temperature and the second preset temperature, and judging whether the outdoor temperature is in a temperature rising process or a temperature reducing process. The emergency refrigeration system of the data center needs to stop cold accumulation under the condition of lower temperature, but because the outdoor temperature is dynamically changed and can be a continuous heating and cooling cyclic process, in order to avoid frequent start and stop of the cold accumulation system caused by temperature change, a control temperature return difference is needed at the outdoor temperature switching point, and the control refers to steps S3 and S5.
S2, controlling the cold accumulation system 111 to stop cold accumulation when the outdoor temperature is less than or equal to the first preset temperature; and starting the standby power supply in the case of mains supply interruption, and controlling the cooling water system 112 to provide cooling water for the water-cooled condenser 120.
And S3, when the outdoor temperature is in the temperature rising process and is greater than the first preset temperature and less than or equal to the second preset temperature, keeping the cold accumulation system 111 in the cold accumulation stopping state.
S4, controlling the cold accumulation system 111 to start cold accumulation when the outdoor temperature is higher than a second preset temperature; and starting the standby power supply to supply power under the condition of mains supply interruption, and controlling the cold accumulation system 111 to provide chilled water for the water-cooled condenser 120. Preferably, in step S4, after controlling the cold storage system 111 to start cold storage, the method further includes: and judging whether the mains supply is interrupted or not, and controlling the cold accumulation system 111 to maintain the temperature of the chilled water within a preset temperature range under the condition that the mains supply is not interrupted.
And S5, when the outdoor temperature is in the cooling process and is greater than the first preset temperature and less than or equal to the second preset temperature, keeping the cold accumulation system 111 in the state of providing chilled water for the water-cooled condenser 120.
Preferably, the control method further includes: when the outdoor temperature is less than the first preset temperature and the temperature of the chilled water is lower than the third preset temperature, the cold storage system 111 evacuates the chilled water inside thereof. Specifically, the water in the cold storage tank 1112 can be drained to prevent freezing by opening the drain valve of the cold storage tank 1112 of the cold storage system 111.
Specifically, when the outdoor temperature is less than or equal to the first preset temperature, the cold storage system 111 is controlled to stop storing cold no matter the outdoor temperature is in the temperature rising process or the temperature lowering process, and the backup power supply is started to supply power in the case of mains supply interruption, and the cooling water system 112 is controlled to supply cooling water to the water-cooled condenser 120, that is, only the cooling water system 112 supplies water to the water-cooled condenser 120. When the outdoor temperature is less than the first preset temperature and the temperature of the chilled water is less than the third preset temperature, in order to prevent freezing, the cold storage system 111 is controlled to empty the chilled water inside. When the outdoor temperature is in the temperature rising process and the outdoor temperature is greater than the first preset temperature and less than or equal to the second preset temperature, the cold accumulation system 111 is kept in the cold accumulation stopping state, and the cooling water system 112 still supplies water for the water-cooled condenser 120. When the outdoor temperature is higher than the second preset temperature, no matter the outdoor temperature is in the temperature rising process or the temperature reducing process, the cold accumulation system 111 is controlled to start cold accumulation, the standby power supply is started to supply power under the condition that the commercial power is interrupted, and the cold accumulation system 111 is controlled to provide chilled water for the water-cooled condenser 120; and controlling the cold accumulation system 111 to maintain the temperature of the chilled water within a preset temperature range under the condition that the mains supply is not interrupted. When the outdoor temperature is in the cooling process, and the outdoor temperature is greater than the first preset temperature and less than or equal to the second preset temperature, the cold storage system 111 is kept in the state of providing chilled water for the water-cooled condenser 120, that is, the cold storage system 111 still supplies water for the water-cooled condenser 120.
It is understood that the term "cold storage" as used herein refers to the cold storage system 111 processing and storing water into chilled water. The specific temperature values of the first preset temperature, the second preset temperature, the third preset temperature and the preset temperature of the chilled water can be set according to actual requirements, and the invention does not limit the specific temperature values.
A preferred embodiment of the control method for the emergency cooling system of the data center of the present invention is shown in fig. 6, wherein the first preset temperature is a, the second preset temperature is b, and the third preset temperature is 3: when the outdoor temperature Ta is less than or equal to a and the water storage temperature Tb in the water storage tank 1112 is less than or equal to 3, the anti-freezing problem of the water storage tank 1112 needs to be considered, and the automatic water drain valve can be controlled to be opened through the cold storage controller so as to drain the cold storage tank 1112 for anti-freezing; when the outdoor temperature is reduced and Ta is less than or equal to b, the cold accumulation system 111 stops cold accumulation, when an emergency refrigeration demand exists (namely, the commercial power is interrupted), the dual power supply is switched on, the indoor fan continuously supplies power, the fan of the cooling tower 1121 continuously supplies power, the cooling water pump 1122 continuously supplies power, and the refrigerant pump 132 continuously supplies power and starts the refrigerant pump 132 to refrigerate so as to meet the emergency refrigeration demand. When the temperature rises and Ta is more than b +5, the cold accumulation system 111 starts cold accumulation, when an emergency cold accumulation demand exists (namely, the commercial power is interrupted), the double power supply is switched on, the indoor fan continuously supplies power, the fan of the cooling tower 1121 stops supplying power, the freezing water pump 1113 continuously supplies power, the refrigerant pump 132 continuously supplies power, the cold accumulation system 111 continuously supplies power, the freezing water pump 1113 is opened, cold accumulation water is input into the water-cooled condenser 120, and the refrigerant pump 132 is started to refrigerate to meet the emergency refrigeration demand; at this time, if there is no emergency refrigeration demand, the cold accumulation system 111 automatically starts to control the temperature of the water in the cold accumulation tank 1112 to be in a set range of 7-12 ℃.
In summary, the emergency refrigeration system of the data center of the present invention is provided with the cooling water system 112 capable of providing cooling water and the cold storage system 111 capable of providing chilled water at the same time, and when the outdoor temperature is high, the cold storage system 111 with lower water temperature can be used to provide chilled water for the water-cooled condenser 120, so as to accelerate the cooling speed of the refrigerant, and realize emergency refrigeration; when the outdoor temperature is low, the cooling water is provided for the water-cooled condenser 120 only through the cooling water system 112 to cool the refrigerant, namely, a natural cold source is utilized to provide refrigeration for the data center, and the cold accumulation system 111 is prevented from being continuously used when the temperature is low, so that the energy is effectively saved, and the defects that the traditional refrigeration scheme needs uninterrupted cold accumulation and does not save energy are overcome. Compared with the traditional refrigeration scheme, the invention realizes emergency refrigeration without entering a data center machine room by arranging the chilled water or the cooling water in the outdoor unit part.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. The emergency refrigeration system for the data center is characterized by comprising a controller (1), an outdoor temperature detection device (2) for detecting outdoor temperature, an outdoor unit (100) and an indoor unit (200) connected with the outdoor unit (100), wherein the controller (1) is respectively connected with the outdoor unit (100) and the indoor unit (200) and controls the working modes of the outdoor unit (100) and/or the indoor unit (200) according to the outdoor temperature;
the outdoor unit (100) comprises a water supply system (110) for water circulation, a refrigerant pressurizing unit (130) for refrigerant circulation, and a water-cooled condenser (120) for heat exchange between the water circulation circuit and the refrigerant circulation circuit;
the water supply system (110) comprises a cooling water system (112) which is connected with the water-cooled condenser (120) and provides cooling water for the water-cooled condenser (120), and a cold storage system (111) which is connected with the water-cooled condenser (120) and provides chilled water for the water-cooled condenser (120), wherein the temperature of the chilled water is lower than that of the cooling water;
the refrigerant pressurizing unit (130) is connected with the water-cooled condenser (120) and the indoor unit (200) and conveys the refrigerant to the indoor unit (200);
the water-cooled condenser (120) comprises two heat exchanging parts for exchanging heat, namely a first heat exchanging part (121) arranged in the water circulation loop and a second heat exchanging part (122) arranged in the refrigerant circulation system, the first heat exchanging part (121) is connected with the cold storage system (111) and the cooling water system (112), and the first heat exchanging part (121) exchanges heat with the refrigerant in the second heat exchanging part (122) through cooling water provided by the cooling water system (112) or chilled water provided by the cold storage system (111) so as to cool the refrigerant;
the refrigerant pressurizing unit (130) comprises a liquid storage tank (131) for storing refrigerant and a refrigerant pump (132) for pressurizing the refrigerant; the indoor unit (200) comprises an evaporator (210) and a compressor (220); the water-cooled condenser (120), the liquid storage tank (131), the refrigerant pump (132), the evaporator (210) and the compressor (220) are sequentially connected to form a refrigerant circulating loop;
the outdoor temperature detection device (2) detects outdoor temperature and sends outdoor temperature information to the controller (1), the controller (1) processes the outdoor temperature information and controls working states of the cold accumulation system (111) and the cooling water system (112) according to processing results;
the cold storage tank (1112) is provided with an automatic drain valve; the cold accumulation system (111) further comprises a cold accumulation controller connected with the automatic water drain valve and a temperature detection device connected with the cold accumulation controller and used for detecting the temperature of the chilled water in the cold accumulation tank (1112);
the temperature detection device detects the temperature of the chilled water in the cold storage tank (1112) and sends chilled water temperature information to the cold storage controller, and the cold storage controller processes the chilled water temperature information and judges whether the automatic water drain valve needs to be controlled to be opened according to a processing result so as to drain the chilled water in the cold storage tank (1112).
2. The data center emergency refrigeration system of claim 1, wherein the refrigerant circulation loop comprises a compressor power circulation mode and a pump power circulation mode: the compressor power cycle mode and the pump power cycle mode are connected in parallel.
3. The data center emergency cooling system of claim 1, wherein the cold storage system (111) comprises a cold storage water chilling unit (1111) for processing water into chilled water, a cold storage water pump (1114), a cold storage tank (1112) for storing chilled water, and a chilled water pump (1113) for sending the chilled water in the cold storage tank (1112) to the water-cooled condenser (120);
the water outlet end of the cold accumulation water chilling unit (1111) is connected with the water inlet end of the cold accumulation tank (1112), the water outlet end of the cold accumulation tank (1112) is connected with the water inlet end of the cold accumulation water chilling unit (1111), and the cold accumulation water pump (1114) is arranged between the water outlet end of the cold accumulation water chilling unit (1111) and the water inlet end of the cold accumulation tank (1112);
the end of intaking of water-cooled condenser (120) is still connected to the play water end of cold accumulation jar (1112), the end of intaking of cold accumulation jar (1112) is connected to the play water end of water-cooled condenser (120), frozen water pump (1113) sets up the play water end of cold accumulation jar (1112) with between the end of intaking of water-cooled condenser (120).
4. The data center emergency refrigeration system according to claim 3, wherein the cold accumulation system (111) further comprises an emergency water replenishing device (1115) for supplying water to the cold accumulation tank (1112), and the emergency water replenishing device (1115) is connected with the cold accumulation water chilling unit (1111) in parallel and then connected with the cold accumulation water pump (1114).
5. The data center emergency cooling system of claim 1, wherein the cooling water system (112) comprises a cooling tower (1121) for cooling water and a cooling water pump (1122) for sending the cooling water in the cooling tower (1121) to the water-cooled condenser (120);
the water outlet end of the cooling tower (1121) is connected with the water inlet end of the water-cooled condenser (120), the water outlet end of the water-cooled condenser (120) is connected with the water inlet end of the cooling tower (1121), and the cooling water pump (1122) is arranged between the water outlet end of the cooling tower (1121) and the water inlet end of the water-cooled condenser (120).
6. The data center emergency cooling system according to any one of claims 1 to 5, wherein a plurality of cooling water systems (112) are provided, and the cold storage system (111) and the plurality of cooling water systems (112) are provided in parallel; and/or
The water-cooled condenser (120) is provided with a plurality of water-cooled condensers (120) which are arranged in parallel.
7. The data center emergency cooling system of claim 1, further comprising a power supply to power the data center emergency cooling system, the power supply comprising a utility power source and a backup power source.
8. A control method for a data center emergency cooling system, applied to the data center emergency cooling system according to any one of claims 1 to 7, comprising the steps of:
s1, comparing the detected outdoor temperature with a first preset temperature and a second preset temperature, and judging whether the outdoor temperature is in a temperature rising process or a temperature reducing process;
s2, controlling the cold accumulation system to stop cold accumulation when the outdoor temperature is less than or equal to the first preset temperature; starting a standby power supply to supply power under the condition of mains supply interruption, and controlling a cooling water system to provide cooling water for a water-cooled condenser;
s3, when the outdoor temperature is in a temperature rising process and the outdoor temperature is greater than the first preset temperature and less than or equal to the second preset temperature, keeping the cold accumulation system in a cold accumulation stopping state;
s4, controlling the cold accumulation system to start cold accumulation when the outdoor temperature is higher than the second preset temperature; starting a standby power supply to supply power under the condition of mains supply interruption, and controlling the cold accumulation system to provide chilled water for the water-cooled condenser;
s5, when the outdoor temperature is in the cooling process, the outdoor temperature is higher than the first preset temperature and lower than or equal to the second preset temperature, the cold accumulation system is kept in the state of providing chilled water for the water-cooled condenser.
9. The control method according to claim 8, wherein, after controlling the cold storage system to start cold storage in step S4, further comprising:
and judging whether the mains supply is interrupted or not, and controlling the cold accumulation system to maintain the temperature of the chilled water within a preset temperature range under the condition that the mains supply is not interrupted.
10. The control method according to claim 8 or 9, characterized by further comprising:
and when the outdoor temperature is lower than the first preset temperature and the temperature of the chilled water is lower than a third preset temperature, the chilled water in the cold accumulation system is emptied by the cold accumulation system.
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| CN111263562B (en) * | 2019-11-28 | 2021-10-26 | 中国电信股份有限公司浙江分公司 | Diversified integrated cooling system of data center and control method |
| CN111397034A (en) * | 2020-02-27 | 2020-07-10 | 华为技术有限公司 | Refrigeration device, control method of refrigeration device, control device, and refrigeration system |
| CN113853094B (en) * | 2020-06-28 | 2024-08-06 | 富联精密电子(天津)有限公司 | Data center cooling system and cooling method for controlling same |
| TWI744969B (en) * | 2020-06-28 | 2021-11-01 | 新加坡商鴻運科股份有限公司 | Data center cooling system and control method of cooling system |
| CN114893838B (en) * | 2022-06-15 | 2024-07-19 | 珠海格力电器股份有限公司 | Cooling apparatus, control method thereof, controller, cooling system, and storage medium |
| CN115076815B (en) * | 2022-06-27 | 2023-10-24 | 珠海格力电器股份有限公司 | Air conditioning system, data center and cooling method |
| CN115279119A (en) * | 2022-07-08 | 2022-11-01 | 广东申菱环境系统股份有限公司 | Assembled refrigerating station for data center |
| CN115419966B (en) * | 2022-09-14 | 2024-11-08 | 珠海格力电器股份有限公司 | Method and device for improving overload capacity of refrigeration and heating equipment and electronic equipment |
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