Composite refrigeration system and control method

Abstract

The invention discloses a composite refrigerating system and a control method, and relates to the technical field of refrigerating assemblies of internet data centers and the like. According to the specific implementation scheme, the system comprises a first refrigerating system, a second refrigerating system, a temperature detector and a controller; refrigerants of the first refrigerating system and the second refrigerating system are different; the controller is electrically connected with the temperature detector, the first refrigerating system and the second refrigerating system. The temperature detector is arranged on a first liquid supply pipeline of the first refrigerating system; the temperature detector is used for detecting the current liquid supply temperature of cooling liquid of the first refrigerating system; the controller is used for determining an adopted target refrigeration mode according to the current liquid supply temperature and a preset corresponding relation between the liquid supply temperature and the refrigeration mode; and according to the target refrigeration mode, the corresponding first refrigeration system and / or the corresponding second refrigeration system are / is controlled to start and operate.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of hardware device management and maintenance, in particular to the technical field of cooling components of Internet Data Center (IDC), and more particularly to a composite refrigeration system and a control method. BACKGROUND

[0002] In the face of the rapid growth of power density of Internet Data Center (IDC) cabinets caused by cloud computing and artificial intelligence applications, the thermal management environment is becoming increasingly complex, showing a mixed form of air cooling and liquid cooling demand. This change has put unprecedented requirements on the architecture of the refrigeration system. The system must have the ability to handle ultra-high heat flux, while being flexible to adapt to differentiated heat dissipation paths. Currently, the refrigeration energy consumption accounts for a high proportion, and the breakthrough of its technical bottleneck is a prerequisite for building the next generation of green, high-density data centers.

[0003] In the prior art, a single refrigeration system such as a chilled water system or a heat pipe multi-connected refrigeration system is usually used, which has poor practicability. SUMMARY

[0004] The present disclosure provides a composite refrigeration system and a control method.

[0005] According to an aspect of the present disclosure, a composite refrigeration system is provided, comprising a first refrigeration system, a second refrigeration system, a temperature detector, and a controller; the refrigerants of the first refrigeration system and the second refrigeration system are different;

[0006] The controller is electrically connected with the temperature detector, the first refrigeration system and the second refrigeration system respectively; the temperature detector is arranged on a first liquid supply pipeline of the first refrigeration system;

[0007] The temperature detector is configured to detect a current liquid supply temperature of the cooling liquid of the first refrigeration system;

[0008] The controller is configured to determine a target refrigeration mode to be adopted according to the current liquid supply temperature and a preset correspondence between liquid supply temperature and refrigeration mode, and control the corresponding first refrigeration system and / or second refrigeration system to start running according to the target refrigeration mode.

[0009] According to another aspect of the present disclosure, a control method of a composite refrigeration system is provided, comprising:

[0010] The temperature detector detects a current liquid supply temperature of the cooling liquid of the first refrigeration system;

[0011] The controller determines a target refrigeration mode to be adopted according to the current liquid supply temperature and a preset correspondence between liquid supply temperature and refrigeration mode.

[0012] The controller controls the first refrigeration system and / or the second refrigeration system to start running according to the target refrigeration mode.

[0013] According to the technology of the present disclosure, at least one refrigeration system in the compound refrigeration system can be automatically and adaptively controlled to start running, and the reliability and energy efficiency of the system can be considered at the same time, thereby effectively improving the practicability of the compound refrigeration system.

[0014] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present disclosure, nor to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are used to better understand the present scheme and do not limit the present disclosure. Among them:

[0016] Figure 1 is a schematic diagram according to the first embodiment of the present disclosure;

[0017] Figure 2 is a schematic diagram according to the second embodiment of the present disclosure;

[0018] Figure 3 is a schematic diagram according to the third embodiment of the present disclosure;

[0019] Figure 4 is a schematic diagram according to the fourth embodiment of the present disclosure; DETAILED DESCRIPTION

[0020] Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, which include various details of the embodiments of the present disclosure to help understanding, and should be considered as merely exemplary. Therefore, those skilled in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Also, in order to be clear and concise, the description below omits the description of well-known functions and structures.

[0021] Obviously, the described embodiments are part of the embodiments of the present disclosure, not all. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present disclosure.

[0022] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0023] Figure 1 This is a schematic diagram based on the first embodiment of the present disclosure; as shown Figure 1 As shown, this embodiment provides a composite refrigeration system 100, including a first refrigeration system 101, a second refrigeration system 102, a temperature detector 103, and a controller 104; the first refrigeration system 101 and the second refrigeration system 102 use different refrigerants;

[0024] The controller 104 is electrically connected to the temperature detector 103, the first refrigeration system 101, and the second refrigeration system 102 respectively; the temperature detector 103 is installed on the first liquid supply line of the first refrigeration system 101.

[0025] Temperature detector 103 is used to detect the current supply temperature of the coolant in the first refrigeration system 101;

[0026] The controller 104 is used to determine the target cooling mode to be used based on the current liquid supply temperature and the preset correspondence between the liquid supply temperature and the cooling mode; and to control the corresponding first cooling system 101 and / or second cooling system 102 to start operation according to the target cooling mode.

[0027] The composite refrigeration system 100 in this embodiment is an example of setting up two refrigeration systems, and the two refrigeration systems use different refrigerants.

[0028] In this embodiment, the composite refrigeration system 100 has two refrigeration systems, the first refrigeration system 101 and the second refrigeration system 102, both of which are always ready to be turned on. A temperature detector 102 is used to detect the current supply temperature of the coolant in the first refrigeration system 101, but this does not necessarily mean that the first refrigeration system 101 is turned on at that time.

[0029] Specifically, temperature detector 103 detects the current supply temperature of the coolant in the first refrigeration system 101. Controller 104 obtains the current supply temperature of the coolant in the first refrigeration system 101 from temperature detector 103 and determines the target refrigeration mode to be used based on a preset correspondence between supply temperature and refrigeration mode. For example, in this embodiment, there can be three refrigeration modes: one mode corresponds to activating one of the first refrigeration system 101 and the second refrigeration system 102; another mode corresponds to activating the other of the first refrigeration system 101 and the second refrigeration system 102; and yet another mode corresponds to activating both the first refrigeration system 101 and the second refrigeration system 102 simultaneously. Furthermore, based on the determined target refrigeration mode, the controller can control the first refrigeration system 101 and / or the second refrigeration system 102 corresponding to that target refrigeration mode to start operation.

[0030] The composite refrigeration system 100 of this embodiment uses a temperature detector 103 to detect the current supply temperature of the coolant in the first refrigeration system 101 in real time. Based on the detected current supply temperature and the preset correspondence between the supply temperature and the refrigeration mode, the controller 104 determines the target refrigeration mode to be used. Then, according to the target refrigeration mode, it automatically controls the first refrigeration system 101 and / or the second refrigeration system 102 corresponding to the target refrigeration mode to start and run. It can automatically and adaptively control the start and run of at least one refrigeration system in the composite refrigeration system 100, and can effectively improve the practicality of the composite refrigeration system 100 while taking into account the reliability of the system and energy efficiency.

[0031] Figure 2 This is a schematic diagram based on the second embodiment of the present disclosure; as shown Figure 2 As shown, this embodiment is based on the above. Figure 1 Based on the technical solutions of the illustrated embodiments, the technical solutions of this disclosure will be described in further detail. For example... Figure 2 As shown, in the composite refrigeration system 200 of this embodiment, the first refrigeration system adopts a coolant pre-cooling system 201; the coolant pre-cooling system 201 includes a cooling component 2011, a first liquid pump 2012, and an indoor coolant coil 2013; the indoor coolant coil 2013 is used in the computer room of the IDC to cool down the servers in the computer room.

[0032] The cooling assembly 2011 is connected to the indoor coolant coil 2013 via a first supply line 2014, which is used to supply low-temperature coolant to the indoor coolant coil 2013 through the first supply line 2014; the indoor coolant coil 2013 is also connected to the cooling assembly 2011 via a first supply circuit 2015, which is used to transfer the high-temperature hot liquid obtained after heat exchange of the coolant back to the cooling assembly 2011 through the first supply circuit 2015;

[0033] The first liquid pump 2012 is installed on the first liquid supply circuit 2015 to help transfer the high-temperature hot liquid after heat exchange back to the cooling assembly 2011.

[0034] Optionally, in one embodiment of this disclosure, the cooling component 2011 can be a cooling tower or a dry cooler. For example, a cooling tower can be used in areas with abundant water resources, while a dry cooler can be used in areas with relatively scarce water resources. Regardless of whether a cooling tower or a dry cooler is used, the refrigerant used in the coolant precooling system 201 is water. Correspondingly, the first night pump 2012 can be a water pump, and the indoor refrigerant coil 2024 is an indoor water coil.

[0035] Optionally, in one embodiment of this disclosure, the coolant precooling system 201 may further include a cooling distribution unit (CDU) 2016; the cooling distribution unit 2016 is also located in the IDC server room, and its function is to be responsible for the flow distribution and temperature control of the coolant, suitable for liquid-cooled server room scenarios.

[0036] The cooling assembly 2011 is connected to the cooling distribution unit 2016 via a second liquid supply line 2017, which is used to supply low-temperature coolant to the cooling distribution unit 2016 via the second liquid supply line 2017.

[0037] The cooling distribution unit 2016 is also connected to the cooling assembly 2011 via the second liquid supply circuit 2018, for transferring the high-temperature hot liquid after heat exchange back to the cooling assembly 2011 via the second liquid supply circuit 2018.

[0038] like Figure 2 As shown, in this embodiment, taking the example of setting only one indoor coolant coil 2013 and one cooling distribution unit 2016 in the coolant precooling system 201, in actual applications, multiple indoor coolant coils 2013 and multiple cooling distribution units 2016 can be set up based on the specific deployment in the IDC server room. Correspondingly, the cooling component 201 provides low-temperature coolant to each indoor coolant coil 2013 and each cooling distribution unit 2016 through multiple liquid supply lines. Correspondingly, the multiple indoor coolant coils 2013 and multiple cooling distribution units 2016 transfer the high-temperature hot liquid obtained by heat exchange of the coolant to the cooling component 201 through multiple liquid supply circuits.

[0039] like Figure 2 As shown, the working principle of the coolant precooling system 201 in this embodiment can be described as follows:

[0040] During cooling, the cooling component 201 supplies low-temperature water to the indoor coolant coil 2013 via the first liquid supply line 2014. This indoor coolant coil 2013 is located inside the IDC's server room. Inside the server room, hot air is directed to the vicinity of the indoor coolant coil 2013 by fans and other equipment. The low-temperature water in the indoor coolant coil 2013 absorbs heat from the hot air, undergoing heat exchange and becoming high-temperature water. This high-temperature water is then transferred back to the cooling component 2011 via the first liquid supply circuit 2015, driven by the first liquid pump 2012, thus removing heat generated by chips and other components within the servers in the server room. Finally, the cooling component 201 cools the high-temperature water back to low-temperature water. This process is then repeated in a cyclical cooling cycle.

[0041] In addition, in a liquid cooling scenario, the cooling assembly 201 supplies low-temperature water to the cooling distribution unit 2016 via a second liquid supply line 2017. This cooling distribution unit 2016 can be mounted on the backplane of the server.

[0042] The cooling assembly 201 supplies low-temperature water to the cooling distribution unit 2016 via the second liquid supply line 2017. The low-temperature water in the cooling distribution unit 2016 absorbs heat from the server and undergoes heat exchange, becoming high-temperature water. This high-temperature water is then returned to the cooling assembly 201 via the second liquid supply circuit 2018, thus removing heat generated by the chips and other components inside the server in the server room. Finally, the cooling assembly 201 cools the high-temperature water back to low-temperature water, and the cycle continues. Similarly, a first liquid pump 2012 can also be installed on the second liquid supply circuit 2018.

[0043] Based on the above, in the composite cooling system 200 of this embodiment, by employing the aforementioned coolant pre-cooling system 201, effective heat dissipation can be achieved for the servers in the IDC. Furthermore, the coolant in the coolant pre-cooling system 201 of this embodiment can be water, and the cooling component 201 can be a cooling tower or a dry cooler, making it suitable for both water-sufficient and water-scarce areas, respectively. This not only ensures high cooling reliability but also broad applicability. Moreover, in this embodiment, the coolant pre-cooling system 201 can also include a cooling distribution unit 2016, suitable for cooling servers in liquid-cooled scenarios, further effectively improving the cooling effect. Further optionally, such as... Figure 2 As shown, in this embodiment, the second refrigeration system adopts a magnetic levitation compressor refrigeration system 202 as an example. Figure 2 As shown, the magnetic levitation compressor refrigeration system 202 includes a condenser 2021, a magnetic levitation compressor 2022, a second liquid pump 2023, and an indoor refrigerant coil 2024; the indoor refrigerant coil 2024 is used in the computer room of the IDC to cool and dissipate heat from the servers in the computer room.

[0044] The condenser 2021 is connected to the indoor refrigerant coil 2024 via a refrigerant supply line 2025, which is used to loosely supply low-temperature liquid refrigerant into the indoor refrigerant coil 2024 through the refrigerant supply line 2025; the indoor refrigerant coil 2024 is also connected to the condenser 2021 via a refrigerant circuit 2026, which is used to return the high-temperature gaseous refrigerant after heat exchange to the condenser 2021 through the refrigerant circuit 2026;

[0045] The refrigerant supply line 2025 is also equipped with a liquid receiver 2027 and a second liquid pump 2023. The liquid receiver 2027 is used to store the liquid refrigerant after cooling from the condenser 2021. The second liquid pump 2023 is used to assist in drawing liquid refrigerant from the liquid receiver 2027 and sending it into the indoor refrigerant coil 2024 through the refrigerant supply line 2025.

[0046] The magnetic levitation compressor 2022 is installed on the refrigerant circuit 2026 and is used to compress the high-temperature gaseous refrigerant after heat exchange in the indoor refrigerant coil 2024 into the condenser 2021 for refrigeration.

[0047] Alternatively, the condenser 2021 in this embodiment can be an evaporative condenser or an air-cooled condenser. For example, an evaporative condenser can be used in areas with abundant water resources, while an air-cooled condenser can be used in areas with relatively scarce water resources.

[0048] Alternatively, in this embodiment, the refrigerant used in the magnetic levitation compressor refrigeration system 202 can be fluorine. Correspondingly, the second liquid pump 2023 can be a fluorine pump, and the indoor refrigerant coil 2024 is an indoor fluorine coil.

[0049] like Figure 2 As shown, the working principle of the magnetic levitation compressor refrigeration system 202 in this embodiment can be described as follows:

[0050] During cooling, the second liquid pump 2023 draws cryogenic liquid refrigerant fluorine from the storage tank 2027 and supplies it to the indoor refrigerant coil 2024 via the refrigerant supply line 2025. This indoor refrigerant coil 2024 can be installed on the backplane of the servers in the IDC's server room. The cryogenic liquid refrigerant fluorine in the indoor refrigerant coil 2024 absorbs heat from the servers, undergoing heat exchange and transforming into high-temperature gaseous fluorine. This high-temperature gaseous fluorine is then transferred back to the condenser 2021 through the refrigerant loop 2026, effectively removing heat generated by the chips and other components within the servers. Finally, the condenser 2021 condenses the high-temperature gaseous fluorine back into cryogenic liquid fluorine and returns it to the storage tank 2027. This process is then repeated for cyclic cooling.

[0051] Based on the above, it can be understood that the indoor coolant coil 2013 and indoor refrigerant coil 2024 included in the two refrigeration systems of this embodiment can be specifically configured as follows:

[0052] If configured as a remote water and refrigerant dual-coil fan wall type, and arranged in the air conditioning rooms on both sides of the computer room, the cooling needs of cabinets with a power density of less than 25kW can be solved through remote air supply.

[0053] It can also be configured as a near-end water and refrigerant dual-coil fan wall type, arranged on the opposite side of the cabinet, and can solve the cooling needs of cabinet power density of 25~40kW through near-end air supply.

[0054] It can also be configured as an inter-row water and refrigerant dual-coil air conditioner, arranged on the same side of the cabinet, suitable for micro-module products, and often used in projects where the height of the computer room is limited or the computer room is delivered in phases.

[0055] Alternatively, based on the above, it can be seen that when the cooling component 2011 of the coolant precooling system 201 adopts a cooling tower and the condenser 2021 of the magnetic levitation compressor refrigeration system 202 adopts an evaporative condenser, it is suitable for areas with abundant water resources. When the cooling component 2011 of the coolant precooling system 201 adopts a dry cooler and the condenser 2021 of the magnetic levitation compressor refrigeration system 202 adopts an air-cooled condenser, the entire system has no water resource requirements and can operate without water throughout the year, making it suitable for water-scarce areas.

[0056] Based on the above, the composite refrigeration system 200 of this embodiment can effectively dissipate heat from the IDC servers by employing the aforementioned magnetic levitation compressor refrigeration system 202. Furthermore, the refrigerant in the magnetic levitation compressor refrigeration system 202 of this embodiment can be fluorine, and the condenser 2021 can be an evaporative condenser or an air-cooled condenser, making it suitable for both water-rich and water-scarce areas. This results in highly reliable refrigeration and broad applicability.

[0057] With the above Figure 1 Similar to the embodiment shown, the composite refrigeration system 200 in this embodiment also includes a temperature detector 203 and a controller 204.

[0058] The controller 204 is connected to the temperature detector 203, the coolant precooling system 201 and the magnetic levitation compressor refrigeration system 202 respectively; the temperature detector 203 is installed on the first liquid supply line 2014 of the coolant precooling system 201.

[0059] Temperature detector 203 is used to detect the current supply temperature of coolant in coolant precooling system 201; specifically, it can be installed on the first supply line 2014.

[0060] The controller 204 is used to determine the target cooling mode to be used based on the current liquid supply temperature and the preset correspondence between the liquid supply temperature and the cooling mode; and to control the corresponding coolant precooling system 201 and / or magnetic levitation compressor cooling system 202 to start operation according to the target cooling mode.

[0061] Further optionally, in one embodiment of this disclosure, when water is used as the coolant in the coolant precooling system 201, the preset correspondence between the supply temperature and the cooling mode includes:

[0062] If the water supply temperature is lower than the first preset temperature, the corresponding completely natural cooling mode will be used; at this time, the heat generated by the server will be carried away by the water in the indoor coolant coil 2013.

[0063] If the water supply temperature is greater than or equal to the first preset temperature and less than the second preset temperature, a partial natural cooling mode is adopted. At this time, the coolant precooling system 201 and the magnetic levitation compressor refrigeration system 202 operate simultaneously. The hot air in the computer room is first precooled by the indoor coolant coil 2013 and then cooled to the air supply temperature by the indoor refrigerant coil 2024.

[0064] If the water supply temperature is greater than or equal to the second preset temperature, the mechanical cooling mode is adopted. Since the water supply temperature of the coolant pre-cooling system 201 is relatively high, the hot air in the computer room is no longer effectively cooled by the indoor coolant coil 2013. At this time, only the magnetic levitation compressor cooling system 202 is running, and the heat generated by the server is carried away by the indoor refrigerant coil 2024.

[0065] In this embodiment, the first preset temperature is lower than the second preset temperature. For example, depending on the needs of the actual scenario, the first preset temperature can be 18 degrees Celsius, and the second preset temperature can be 32 degrees Celsius. Of course, in actual scenarios, the first and second preset temperatures can also be set to other values ​​according to specific needs or experience, and this is not limited here.

[0066] Correspondingly, based on the aforementioned preset relationship between liquid supply temperature and cooling mode, the controller is specifically used for:

[0067] When the completely natural cooling mode is selected, control the first refrigeration system as follows: Figure 2 The coolant precooling system 201 is started;

[0068] When the partial natural cooling mode is selected, control the first refrigeration system as follows: Figure 2 The coolant precooling system 201 and the second refrigeration system are as follows Figure 2 The magnetic levitation compressor refrigeration system 202 in the middle starts simultaneously;

[0069] When mechanical refrigeration mode is selected, control the second refrigeration system as follows: Figure 2The magnetic levitation compressor refrigeration system 202 is started.

[0070] Correspondingly, controller 204 is specifically used for:

[0071] When the completely natural cooling mode is selected, the first refrigeration system is controlled as follows: Figure 2 The first valves 2019 installed on the first liquid supply line 2014 and the second liquid supply line 2017 of the coolant precooling system 201 are opened, and the second refrigeration system is controlled to open. Figure 2 The second valve 2028 on the refrigerant supply line 2025 of the magnetic levitation compressor refrigeration system 202 is closed, controlling the first refrigeration system as follows: Figure 2 Start-up of the coolant precooling system 201 in the middle;

[0072] When the partial natural cooling mode is selected, the first refrigeration system is controlled as follows: Figure 2 The first valves 2019 installed on the first liquid supply line 2014 and the second liquid supply line 2017 of the coolant precooling system 201 are opened, and the second refrigeration system is controlled to open. Figure 2 The second valve 2028 on the refrigerant supply line 2025 of the magnetic levitation compressor refrigeration system 202 is opened, controlling the first refrigeration system as follows: Figure 2 The coolant precooling system 201 and the second refrigeration system are as follows Figure 2 The magnetic levitation compressor refrigeration system 202 in the middle is started simultaneously;

[0073] When mechanical refrigeration mode is selected, the first refrigeration system is controlled as follows: Figure 2 The first valves 2019 installed on the first liquid supply line 2014 and the second liquid supply line 2017 of the coolant precooling system 201 are closed, and the second refrigeration system is controlled to close. Figure 2 The second valve 2028 on the refrigerant supply line 2025 of the magnetic levitation compressor refrigeration system 202 is opened, controlling the second refrigeration system as follows: Figure 3 The magnetic levitation compressor refrigeration system 202 in the middle is started.

[0074] It should be noted that, for illustrative purposes only, Figure 3 The example shown is that the controller 204 is connected to the first valve 2019 on the first liquid supply line 2014. In actual applications, the controller 204 should also be connected to the first valve 2019 on the second liquid supply line 2017.

[0075] It should be noted that the first valve 2019 and the second valve 2028 in this embodiment can not only control the opening and closing of the corresponding pipelines, but also control the degree of opening, such as fully open, 1 / 3 open, 3 / 4 open, or 4 / 5 open, etc. Specifically, in actual scenarios, an appropriate opening size can be configured according to the heat dissipation requirements.

[0076] The composite refrigeration system 200 of this embodiment uses a temperature detector 203 to detect the current supply temperature of the coolant in the coolant pre-cooling system 201 in real time. Based on the detected current supply temperature and the preset correspondence between the supply temperature and the refrigeration mode, the controller 204 determines the target refrigeration mode to be used. Then, according to the target refrigeration mode, it automatically controls the start-up and operation of the fusion coolant pre-cooling system 201 and / or the magnetic levitation compressor refrigeration system 202 corresponding to the target refrigeration mode. It can automatically and adaptively control the start-up and operation of at least one refrigeration system in the composite refrigeration system 300, and can effectively improve the practicality of the composite refrigeration system 200 while taking into account the reliability of the system and energy efficiency.

[0077] The composite refrigeration system 200 of this embodiment, through its integrated refrigeration architecture combining a coolant pre-cooling system 201 and a magnetic levitation compressor refrigeration system 202, achieves a balance between energy efficiency and reliability, and possesses broad adaptability to various scenarios. The coolant supply loop in the coolant pre-cooling system 201 maximizes the utilization of natural cold sources, achieving high efficiency and energy saving. Simultaneously, it supports integrated distributed deployment of multi-unit heat pipes, ensuring high reliability. This design allows the composite refrigeration system 200 to comprehensively cover the heat dissipation needs of all scenarios, from traditional air-cooled cabinets to liquid-cooled cabinets.

[0078] Furthermore, the composite refrigeration system 200 in this embodiment is designed with full consideration of compatibility with existing infrastructure and economic efficiency in retrofitting, and can be flexibly adapted to traditional computer room retrofitting scenarios based on chilled water systems. When the core refrigeration unit reaches the end of its service life, the system can utilize the existing old cooling tower and some hydraulic modules, integrating them into a pre-cooling unit, which can significantly reduce the initial investment in the equipment upgrade process and has excellent cost-effectiveness.

[0079] Figure 1 This is a schematic diagram based on the third embodiment of this disclosure; as shown Figure 1 As shown, the control method of the composite refrigeration system in this embodiment may specifically include the following steps:

[0080] S301, The temperature detector detects the current supply temperature of the coolant in the first refrigeration system;

[0081] S302. The controller determines the target cooling mode to be used based on the current liquid supply temperature and the preset correspondence between the liquid supply temperature and the cooling mode.

[0082] S303. The controller controls the corresponding first refrigeration system and / or second refrigeration system to start operation according to the target refrigeration mode.

[0083] Specifically, the control method of the composite refrigeration system in this embodiment is specifically used to implement the above-mentioned... Figure 4 The composite refrigeration system of the embodiment shown is controlled, and details can be found in the above description. Figure 4 The relevant descriptions of the embodiments shown will not be repeated here.

[0084] The control method of the composite refrigeration system in this embodiment can automatically and adaptively control the start-up and operation of at least one refrigeration system in the composite refrigeration system, and can effectively improve the practicality of the composite refrigeration system while taking into account the reliability of the system and energy efficiency.

[0085] Figure 3 This is a schematic diagram based on the fourth embodiment of the present disclosure; as shown Figure 4 As shown, the control method of the composite refrigeration system in this embodiment is based on the above... Figure 2 Based on the technical solutions of the illustrated embodiments, the technical solutions of this disclosure will be described in further detail. For example... Figure 2 As shown, the control method of the composite refrigeration system in this embodiment may specifically include the following steps:

[0086] S401, The temperature detector detects the current supply temperature of the cooling water in the first refrigeration system;

[0087] In this embodiment, water is used as the coolant in the first refrigeration system. Specifically, the first refrigeration system can be a coolant precooling system, which can specifically employ... Figure 2 The structure of the coolant precooling system is shown.

[0088] S402. The controller detects whether the current water supply temperature is less than the first preset temperature, greater than or equal to the first preset temperature and less than the second preset temperature, or greater than or equal to the second preset temperature. If the current water supply temperature is detected to be less than the first preset temperature, step S403 is executed. If the current water supply temperature is detected to be greater than or equal to the first preset temperature and less than the second preset temperature, step S405 is executed. If the current water supply temperature is detected to be greater than or equal to the second preset temperature, step S407 is executed.

[0089] In this embodiment, the first preset temperature can be set to 18 degrees and the second preset temperature can be set to 32 degrees. In actual applications, the first preset temperature and the second preset temperature can also be set to other values ​​according to the needs of the actual scenario, which is not limited here.

[0090] S403. Determine to use the complete natural cooling mode; proceed to step S404.

[0091] S404, Control the start of the first refrigeration system, then stop.

[0092] S405. Determine to use partial natural cooling mode; proceed to step S406.

[0093] S406, Control the first and second refrigeration systems to start simultaneously, then end.

[0094] S407. Determine to use mechanical refrigeration mode; proceed to step S408.

[0095] S408, control the second refrigeration system to start, then stop.

[0096] The control method of the composite refrigeration system in this embodiment is specifically used to implement the above-mentioned... ​ The composite refrigeration system of the embodiment shown is controlled, and details can be found in the above description. ​ The relevant descriptions of the embodiments shown will not be repeated here.

[0097] The control method of the composite refrigeration system in this embodiment can automatically and adaptively control the start-up and operation of at least one refrigeration system in the composite refrigeration system, and can effectively improve the practicality of the composite refrigeration system while taking into account the reliability of the system and energy efficiency.

[0098] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and this is not limited herein.

[0099] The specific embodiments described above do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A composite refrigeration system comprising a first refrigeration system, a second refrigeration system, a temperature detector, and a controller; refrigerants of the first refrigeration system and the second refrigeration system are different; the controller is electrically connected with the temperature detector, the first refrigeration system and the second refrigeration system respectively; the temperature detector is arranged on a first liquid supply pipeline of the first refrigeration system; the temperature detector is configured to detect a current liquid supply temperature of a cooling liquid of the first refrigeration system; the controller is configured to determine a target refrigeration mode according to the current liquid supply temperature and a preset corresponding relationship between a liquid supply temperature and a refrigeration mode, and control the corresponding first refrigeration system and / or the second refrigeration system to start running according to the target refrigeration mode.

2. The system of claim 1, wherein, the first refrigeration system adopts a cooling liquid precooling system; the cooling liquid precooling system comprises a cooling assembly, a first liquid pump, and an indoor cooling liquid coil; the cooling assembly and the indoor cooling liquid coil are connected through a first liquid supply pipeline, configured to provide low-temperature cooling liquid to the indoor cooling liquid coil through the first liquid supply pipeline; the indoor cooling liquid coil is further connected with the cooling assembly through a first liquid return pipeline, configured to return high-temperature hot liquid obtained by heat exchange of the cooling liquid to the cooling assembly through the first liquid return pipeline; the first liquid pump is arranged on the first liquid return pipeline, configured to return the high-temperature hot liquid after heat exchange to the cooling assembly.

3. The system of claim 2, wherein the cooling assembly comprises a cooling tower or a dry cooler.

4. The method of claim 2, wherein, the cooling liquid precooling system further comprises a cooling distribution unit; the cooling assembly and the cooling distribution unit are connected through a second liquid supply pipeline, configured to provide low-temperature cooling liquid to the cooling distribution unit through the second liquid supply pipeline; the cooling distribution unit is further connected with the cooling assembly through a second liquid return pipeline, configured to return high-temperature hot liquid after heat exchange to the cooling assembly through the second liquid return pipeline.

5. The system of claim 1, wherein, the second refrigeration system is a magnetic suspension compressor refrigeration system, which comprises a condenser, a magnetic suspension compressor, a second liquid pump, and an indoor refrigerant coil; the condenser and the indoor refrigerant coil are connected through a refrigerant supply pipeline, configured to send low-temperature liquid refrigerant into the indoor refrigerant coil through the refrigerant supply pipeline; the indoor refrigerant coil is further connected with the condenser through a refrigerant return pipeline, configured to return high-temperature gaseous refrigerant after heat exchange to the condenser through the refrigerant return pipeline; the refrigerant supply pipeline is further provided with a liquid storage tank and a second liquid pump; the liquid storage tank is configured to store liquid refrigerant after refrigeration from the condenser; the second liquid pump is configured to extract the liquid refrigerant from the liquid storage tank and send it into the indoor refrigerant coil through the refrigerant supply pipeline; the magnetic suspension compressor is arranged on the refrigerant return pipeline, configured to compress the high-temperature gaseous refrigerant after heat exchange of the indoor refrigerant coil into the condenser for refrigeration.

6. The system of claim 3, wherein, The condenser comprises an evaporative condenser or an air-cooled condenser.

7. The system of claim 1, wherein, The cooling liquid in the first refrigeration system is water, and the preset corresponding relationship between the supply water temperature and the refrigeration mode comprises: If the supply water temperature is less than a first preset temperature, a completely natural cooling mode is correspondingly adopted; If the supply water temperature is greater than or equal to the first preset temperature and less than a second preset temperature, a partially natural cooling mode is correspondingly adopted; If the supply water temperature is greater than or equal to the second preset temperature, a mechanical refrigeration mode is correspondingly adopted.

8. The method of claim 7, wherein, The controller is specifically configured to: determine that the completely natural cooling mode is adopted, and control the first refrigeration system to start; determine that the partially natural cooling mode is adopted, and control the first refrigeration system and the second refrigeration system to start simultaneously; determine that the mechanical refrigeration mode is adopted, and control the second refrigeration system to start.

9. The method of claim 8, wherein, The controller is specifically configured to: determine that the completely natural cooling mode is adopted, and control the first refrigeration system to start by controlling a first valve arranged on a first supply water pipeline and a second supply water pipeline of the first refrigeration system to be opened and controlling a second valve arranged on a refrigerant supply water pipeline of the second refrigeration system to be closed; determine that the partially natural cooling mode is adopted, and control the first refrigeration system and the second refrigeration system to start simultaneously by controlling the first valve arranged on the first supply water pipeline and the second supply water pipeline of the first refrigeration system to be opened and controlling the second valve arranged on the refrigerant supply water pipeline of the second refrigeration system to be opened; determine that the mechanical refrigeration mode is adopted, and control the second refrigeration system to start by controlling the first valve arranged on the first supply water pipeline and the second supply water pipeline of the first refrigeration system to be closed and controlling the second valve arranged on the refrigerant supply water pipeline of the second refrigeration system to be opened.

10. A control method of a composite refrigeration system, comprising: a temperature detector detecting a current supply water temperature of a cooling liquid of a first refrigeration system; a controller determining a target refrigeration mode to be adopted according to the current supply water temperature and a preset corresponding relationship between a supply water temperature and a refrigeration mode; the controller controlling corresponding first refrigeration system and / or second refrigeration system to start and run according to the target refrigeration mode.

11. The method of claim 10, wherein, If the cooling liquid in the first refrigeration system is water, the controller determines the target refrigeration mode to be adopted according to the current supply water temperature and the preset corresponding relationship between the supply water temperature and the refrigeration mode, which comprises: the controller determines that the completely natural cooling mode is adopted when it is detected based on the preset corresponding relationship between the supply water temperature and the refrigeration mode that the current supply water temperature is less than a first preset temperature; the controller determines that the partially natural cooling mode is adopted when it is detected based on the preset corresponding relationship between the supply water temperature and the refrigeration mode that the current supply water temperature is greater than or equal to the first preset temperature and less than a second preset temperature; and the controller determines that the mechanical refrigeration mode is adopted when it is detected based on the preset corresponding relationship between the supply water temperature and the refrigeration mode that the current supply water temperature is greater than or equal to the second preset temperature.

12. The method of claim 11, wherein, The controller controls the first refrigeration system and / or the second refrigeration system to start running according to the target refrigeration mode, including: The controller controls the first refrigeration system to start when the full natural cooling mode is determined to be adopted; The controller controls the first refrigeration system and the second refrigeration system to start simultaneously when the partial natural cooling mode is determined to be adopted; or The controller controls the second refrigeration system to start simultaneously when the mechanical refrigeration mode is determined to be adopted.

13. The method of claim 12, wherein, The controller controls the first refrigeration system to start when the full natural cooling mode is determined to be adopted, including: The controller controls the first refrigeration system to start when the full natural cooling mode is determined to be adopted by controlling the first valve arranged on the first liquid supply pipeline and the second liquid supply pipeline of the first refrigeration system to be opened, and controlling the second valve arranged on the refrigerant liquid supply pipeline of the second refrigeration system to be closed; The controller controls the first refrigeration system and the second refrigeration system to start simultaneously when the partial natural cooling mode is determined to be adopted, including: The controller controls the first refrigeration system and the second refrigeration system to start simultaneously when the partial natural cooling mode is determined to be adopted by controlling the first valve arranged on the first liquid supply pipeline and the second liquid supply pipeline of the first refrigeration system to be opened, and controlling the second valve arranged on the refrigerant liquid supply pipeline of the second refrigeration system to be opened; The controller controls the second refrigeration system to start simultaneously when the mechanical refrigeration mode is determined to be adopted, including: The controller controls the second refrigeration system to start simultaneously when the mechanical refrigeration mode is determined to be adopted by controlling the first valve arranged on the first liquid supply pipeline and the second liquid supply pipeline of the first refrigeration system to be closed, and controlling the second valve arranged on the refrigerant liquid supply pipeline of the second refrigeration system to be opened.

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