System and method for direct liquid cooling (DLC) of an it infrastructure having a self-addressing function

Abstract

The invention relates to an arrangement for direct liquid cooling (DLC) of an IT infrastructure, wherein the arrangement comprises at least one IT rack (1) having a plurality of plug-in modules (2) for plug-in units (2.1) of a direct liquid cooling (DLC) system and / or IT infrastructure, wherein the arrangement comprises a bus system (40) which has a control unit (9) and a bus (41) having a plurality of data interfaces (42) for the connection of plug-in units (2.1) of a direct liquid cooling (DLC) system, characterised in that the bus system (40) has a self-addressing function for plug-in units (2.1) of a direct liquid cooling (DLC) system, which plug-in units can be connected to the bus (41).

Description

[0001] SYSTEM AND METHOD FOR DIRECT LIQUID COOLING (DLC) OF A SELF-ADDRESSING IT INFRASTRUCTURE

[0002] The present disclosure relates to a system and a method for direct liquid cooling (DLC) of an IT infrastructure. Such an arrangement is known from US 2007 / 0274043 Ai. Similar arrangements are described in US 2007 / 0274043 Ai, US 11,395,443 B2, US 2022 / 0330459 Ai, US 2014 / 0238065 Ai, and US 2022 / 00039291 Ai.

[0003] In the field of direct liquid cooling (DLC) of IT infrastructures, it is common to use cooling systems to efficiently dissipate the heat generated by IT equipment. These systems typically include coolant distribution units (CDUs), residual heat pump units (RPUs), and various types of heat exchangers integrated into IT racks. Known systems, such as those described in US 2007 / 0274043 Ai, often utilize complex piping systems and manual configuration processes to ensure cooling. These systems require significant manual intervention and are prone to errors caused by human error. Furthermore, they are often not modular, which complicates maintenance and component replacement.

[0004] According to US 11,395,443 B2, known DLC systems often include a variety of sensors and control devices used to monitor and control cooling processes. However, these systems often rely on hardwired connections, which limits the flexibility and scalability of the IT infrastructure. These systems lack an efficient method for addressing and configuring the connected devices, resulting in increased effort during commissioning and maintenance. Integrating new components into existing systems often requires extensive manual intervention and adjustments, increasing operating costs and prolonging downtime.

[0005] Despite the considerable progress made in the field of direct liquid cooling (DLC), there remains a need for improved systems that offer greater flexibility, scalability, and ease of use. In particular, there is a need for systems that allow simplified addressing and configuration of connected devices to minimize installation and maintenance efforts. Therefore, the object of the present invention is to provide a direct liquid cooling (DLC) arrangement for an IT infrastructure that allows for the simplest possible replacement and addition of DLC devices, preferably without taking the DLC out of service.

[0006] According to a particular feature of the invention, the arrangement for direct liquid cooling (DLC) of an IT infrastructure comprises at least one IT rack with a plurality of slots for plug-in units of direct liquid cooling (DLC) and / or IT infrastructure. An IT rack is a standardized enclosure used to house and organize IT components. Plug-in units are modular units that can be inserted into the slots of the IT rack and belong either to the direct liquid cooling (DLC) system or to the general IT infrastructure. The slots of the IT rack are designed to accommodate plug-in units of the DLC. The DLC can be modular, with one module of the DLC corresponding to one plug-in unit of the DLC.

[0007] The arrangement comprises a bus system with a control unit that has a bus with multiple data interfaces for connecting plug-in direct liquid cooling (DLC) units. A bus system is a communication structure that enables various components to exchange data. The control unit is a central unit that manages and monitors the bus system. The bus is the physical connection over which the data is transmitted, and the data interfaces are the points where the plug-in units can be connected, preferably without tools.

[0008] A key feature of the bus system is self-addressing for plug-in direct liquid cooling (DLC) units that can be connected to the bus. Self-addressing means that the units automatically receive a unique address within the bus system as soon as they are connected, without requiring any manual configuration. One advantage of this self-addressing is simplified installation and maintenance of the IT infrastructure, as the effort required for manually addressing and configuring the units is eliminated. Another advantage is increased flexibility and scalability of the system, since new units can be easily added, especially while the DLC is in operation.According to one embodiment of the invention, the modules are arranged vertically in the IT rack, with the bus, preferably a CAN bus, comprising a bus line extending vertically and featuring multiple connectors as a data interface. The connectors are preferably designed for tool-free connection of the modules to the bus line. Preferably, the connectors and corresponding complementary connectors of the modules are designed for hot-swapping. This arrangement enables efficient and structured cabling within the IT rack, thereby simplifying the installation and maintenance of the modules. The use of a CAN bus as a communication medium offers several advantages, including robust and reliable data transmission and high interference immunity, which is particularly important in IT infrastructure.The CAN bus is known for its ability to communicate in real time while ensuring high fault tolerance, thus increasing the overall reliability of the IT infrastructure. The bus line, running vertically, allows for easy integration and expansion of IT racks, as additional plug-in devices can be added without requiring extensive rewiring. The majority of connectors acting as data interfaces ensure that each plug-in device can be individually addressed and controlled, increasing the flexibility and scalability of the entire setup. This configuration supports self-addressing of the plug-in devices, enabling automatic detection and configuration upon connection to the bus. This reduces manual effort and the potential for errors during commissioning and maintenance of the IT infrastructure.

[0009] In one embodiment, the arrangement for the direct liquid cooling of an IT infrastructure is designed such that the bus system possesses self-addressing capability. This self-addressing enables the bus system to read at least one unique identifier of a plug-in device connected to the bus or at least one module of the plug-in device. This means that every plug-in device or module connected to the bus and fundamentally designed for self-addressing can be automatically detected and identified without requiring manual configuration. The unique identifier can be, for example, a serial number, a model code, or another form of identification that uniquely describes the plug-in device or module. This self-addressing and automatic identification capability offers several advantages.One advantage is the simplified installation process, as manual entry of addresses or identification numbers is no longer necessary. This reduces the likelihood of errors and saves time when setting up the IT infrastructure. Another advantage is the improved management and monitoring of the IT infrastructure, since the control unit has accurate information about the connected modules and assemblies at all times. This enables more precise control of the liquid cooling system and more efficient resource utilization. Furthermore, the system can react more quickly to configuration changes, as new devices or assemblies are immediately detected and integrated into the system. In addition, automatic identification increases system security, as only authorized and correctly identified devices are granted access to the bus system.This can help prevent unauthorized access and protect the integrity of the IT infrastructure. Overall, the ability to self-address and automatically identify contributes to a more robust, efficient, and secure IT infrastructure that is easier to manage and maintain.

[0010] According to one embodiment, the bus system is configured to determine, based on the read-out identifier, an address stored in the control unit's memory and labeled with the read-out identifier, for the plug-in device or at least one module of the plug-in device that has the unique identifier. This means that preferably each plug-in device or module within the IT infrastructure has a unique identifier that can be read by the bus system. This identifier is used to identify a specific address in the control unit's memory. The control unit's memory contains a database or table in which the addresses of the various plug-in devices or modules are stored. Once the identifier is read, the control unit can retrieve the corresponding address from the memory and assign it to the plug-in device or module.This enables efficient and error-free communication between the various components of the IT infrastructure. One advantage of this arrangement is the automatic and dynamic addressing of the plug-in devices, which significantly simplifies the installation and maintenance of the IT infrastructure. There is no need to manually configure or manage addresses, as the system handles this automatically using unique identifiers. This reduces the likelihood of errors and minimizes the effort required for configuring and managing the IT infrastructure. Another advantage is the increased flexibility and scalability of the system. New plug-in devices or modules can be easily added, and the bus system will automatically detect and address the new components. This allows for easy expansion of the IT infrastructure without extensive manual intervention.Furthermore, automatic addressing can help improve the efficiency of the cooling system, as the liquid cooling control can be precisely and selectively tailored to the specific requirements of individual rack units or assemblies. This results in optimized cooling performance and more efficient energy consumption. Overall, this arrangement offers improved usability, flexibility, and efficiency for the direct liquid cooling of IT infrastructures.

[0011] According to one embodiment, the arrangement comprises at least one plug-in direct liquid cooling (DLC) unit with at least one assembly addressed via the bus system, wherein the assembly has at least one and preferably several components that can be addressed independently of one another via the bus system. This enables, for example, precise control and monitoring of the individual components within the assembly, resulting in improved efficiency and flexibility of the cooling solution. The bus system, which is designed for self-addressing of the plug-in units, allows each assembly and its components to automatically receive a unique address as soon as they are connected to the system. This significantly simplifies the installation and configuration of the IT infrastructure, as no manual addressing is required.The ability to address multiple components within an assembly independently allows for differentiated control and monitoring, resulting in optimized cooling performance. For example, the cooling capacity of individual components can be adjusted as needed, leading to improved energy efficiency and a longer lifespan for the IT hardware. Furthermore, this arrangement facilitates troubleshooting and maintenance, as specific components within an assembly can be addressed and diagnosed. This reduces downtime and increases the overall system reliability. Another advantage of this arrangement is its scalability, as additional modules and assemblies can be easily integrated into the existing system without requiring extensive infrastructure modifications.This makes the solution particularly attractive for growing IT environments that require a flexible and adaptable cooling solution. The use of a self-addressing bus system and the ability to have multiple independently addressable components within a single assembly thus represents an advanced and efficient solution for the direct liquid cooling of IT infrastructures. According to one embodiment, the arrangement comprises several components that can be addressed independently via the bus system and are preferably identical and / or redundant. This enables flexible and efficient management of the cooling components within the IT infrastructure. The ability to address each component independently provides precise control and monitoring of the cooling processes, resulting in optimized cooling performance.The self-addressing capability of the plug-in devices significantly simplifies the installation and configuration of components, as no manual address assignment is required. This reduces the potential for errors and the time required to set up the IT infrastructure. The use of identical parts ensures that the components are interchangeable, which facilitates maintenance and replacement in the event of a failure. Redundant component design increases the reliability and availability of the system, as a failing component can be immediately replaced by another without interrupting operations. This is particularly important in critical IT environments where downtime must be minimized. The integration of a self-addressing bus system and the ability to address components independently contribute to the scalability of the IT infrastructure.New components can be easily added without requiring extensive modifications to the existing system. This allows for flexible adaptation to growing demands and future expansions of the IT infrastructure. Another advantage of this configuration is improved energy efficiency. Targeted control of the cooling components optimizes energy consumption, leading to reduced operating costs. The redundant design of the components also contributes to increased operational reliability, as the system remains functional even if individual components fail. Overall, this configuration offers a robust, flexible, and efficient solution for the direct liquid cooling of IT infrastructures, simplifying installation and maintenance processes while also increasing operational reliability and energy efficiency.

[0012] According to one embodiment, the arrangement comprises a pump unit of a coolant distribution unit (CDU) or a reservoir and pumping unit (RPU), which has at least one and preferably several pumps for fluid transport, wherein these pumps are identical and / or redundant to each other. The identical pumps facilitate maintenance and replacement, as identical components can be used, which simplifies inventory management and reduces operating costs. The redundant design of the pumps increases the system's reliability, since in the event of a pump failure, one or more other pumps can continue to ensure fluid transport. This is particularly important in critical IT environments where continuous operation is essential.The pump unit in the coolant distribution unit or the reservoir and pump unit ensures that the coolant circulates efficiently through the system and dissipates heat from the IT components. This helps maintain optimal operating temperatures and protects the hardware from overheating, thus increasing the lifespan and reliability of the IT infrastructure. Integrating the pump unit into the coolant distribution unit or the reservoir and pump unit allows for a compact and space-saving design that can be easily integrated into existing IT racks. The use of identical parts and redundant pumps also increases the system's flexibility, as it can be easily adapted to different cooling requirements. The redundant design also offers the advantage of increased operational reliability, as the system remains functional in the event of a pump failure, maximizing the availability of the IT infrastructure.Overall, this arrangement contributes to improved efficiency, reliability and flexibility of direct liquid cooling in IT infrastructures and ensures that IT components are always optimally cooled.

[0013] In one embodiment, the bus system is configured to read operating data from at least one plug-in unit of a direct liquid cooling system, at least one assembly of the direct liquid cooling system, or at least one component of the assembly. The control unit is preferably configured to determine the maintenance status, remaining service life, or wear status of the at least one plug-in unit, at least one assembly, or at least one component based on this operating data. This configuration enables continuous monitoring and analysis of the operating data, leading to improved maintenance planning and optimized component lifespan. The ability to read and analyze operating data allows potential problems to be identified and resolved early, before they lead to failures or performance losses.This contributes to increased reliability and efficiency of the IT infrastructure. Another advantage of this arrangement is the reduction of unplanned downtime, as maintenance can be performed based on actual operating conditions rather than fixed intervals. This leads to better resource utilization and a longer component lifespan. Furthermore, the self-addressing of the bus system enables the simple and rapid integration of new plug-in devices without the need for manual configuration. This saves time and reduces the potential for errors during the installation and maintenance of the IT infrastructure. The combination of these features results in a robust and scalable solution for the direct liquid cooling of IT infrastructures, improving both operational efficiency and ease of maintenance.

[0014] In one embodiment, the arrangement comprises an IT rack that exclusively houses direct liquid cooling (DLC) devices and contains no IT infrastructure equipment. This means that the IT rack is specifically designed to accommodate DLC rack-mount devices without housing any IT infrastructure components such as servers, storage, or network equipment. This configuration offers several advantages. First, cooling efficiency is maximized because the entire IT rack is optimized for direct liquid cooling, and there are no additional heat sources from IT infrastructure equipment. Second, maintenance and management of the cooling devices are simplified because all components requiring direct liquid cooling are centralized and easily accessible.Third, this arrangement allows for better scalability and flexibility, as the IT rack can be modular and easily expanded with additional DLC modules as needed. Fourth, the absence of IT infrastructure equipment within the IT rack reduces the complexity of cabling and physical layout, resulting in a cleaner and more organized installation. Furthermore, the self-addressing bus system can operate more efficiently because it interacts exclusively with DLC modules and does not need to manage additional data connections to IT infrastructure equipment. This reduces the likelihood of communication errors and improves system reliability.Another advantage is improved energy efficiency, as direct liquid cooling typically consumes less energy than conventional air cooling systems, and concentrating on DLC rack-mounted units further enhances this efficiency. Finally, this specific configuration contributes to reduced operating costs, since maintenance costs for a pure DLC system are generally lower than for a mixed system that includes both DLC and IT infrastructure equipment. These advantages make the described configuration particularly suitable for data centers and other IT environments that require high cooling capacity and efficiency.

[0015] According to one embodiment of the invention, the arrangement for direct liquid cooling of an IT infrastructure comprises devices specifically designed for coolant distribution and storage, including plug-in coolant distribution units or reservoir and pump units. These devices are integral components of the liquid cooling systems and play a crucial role in the efficient cooling of the IT infrastructure. The coolant distribution unit (CDU) serves to distribute the coolant precisely and in a controlled manner to the various components of the IT infrastructure. This ensures uniform and effective cooling, thereby reducing the thermal load on the hardware components. The reservoir and pump unit (RPU), on the other hand, is responsible for storing and circulating the coolant.It ensures that a sufficient amount of coolant is always available and that it is pumped through the system at the necessary pressure. Integrating these specific devices into the configuration significantly increases the efficiency of the liquid cooling. One advantage of this configuration is the improved thermal performance of the IT infrastructure, leading to greater reliability and a longer hardware lifespan. Another advantage is the flexibility and scalability of the cooling system, as the modules can be easily added or removed to adapt the cooling requirements to the specific needs of the IT infrastructure. This enables a customized cooling solution suitable for both small and large IT environments.Furthermore, the self-addressing of the plug-in units simplifies system installation and maintenance, as the units are automatically detected and configured as soon as they are connected to the bus system. This reduces manual effort and minimizes the potential for errors during cooling system setup. Overall, the combination of coolant distribution unit and reservoir and pump unit, along with the self-addressing of the plug-in units, offers a highly efficient and user-friendly solution for direct liquid cooling of IT infrastructures.

[0016] According to one embodiment, the arrangement comprises a housing containing at least one pump, preferably several redundant pumps, and particularly preferably several pumps connected in parallel. This specific design of the arrangement offers significant advantages in terms of the reliability and efficiency of direct liquid cooling (DLC) of an IT infrastructure. The housing serves as a protective and integrated structure for the pumps, creating a compact and protected environment that increases the service life and functionality of the pumps. The inclusion of at least one pump in the housing enables a continuous and stable coolant supply, which is crucial for maintaining optimal operating temperatures of the IT infrastructure.The use of multiple redundant pumps significantly increases operational reliability, as one or more backup pumps can immediately take over to maintain the cooling circuit in the event of a pump failure. This is particularly advantageous in critical IT environments where a cooling failure could lead to significant damage or data loss. Connecting the pumps in parallel also offers the benefit of even load distribution and increases the overall capacity of the cooling system. The parallel arrangement allows the pumps to work together to circulate larger volumes of coolant, thus increasing the efficiency of the cooling system and enabling better temperature control.

[0017] Integrating the pumps into a single housing also simplifies maintenance and component replacement. Technicians can quickly access the pumps when needed without having to dismantle the entire IT infrastructure, reducing maintenance times and increasing system availability. Furthermore, the housing contributes to noise reduction by minimizing pump operating noise, which is beneficial in noise-sensitive environments such as data centers.

[0018] Overall, this design offers a robust, efficient, and easy-to-maintain solution for the direct liquid cooling of IT infrastructures, improving both the operational reliability and the performance of the cooled systems. The combination of a protective housing and multiple redundant, parallel-connected pumps ensures reliable cooling even under demanding conditions and optimal protection of the IT infrastructure.

[0019] In one embodiment, the arrangement comprises several devices, each with its own housing and preferably identical in design, which are housed in the IT rack. This configuration enables a standardized and modular structure within the IT rack, significantly simplifying maintenance and device replacement. The identical design of the devices ensures that each device has the same mechanical and electrical interfaces, increasing compatibility and interoperability within the IT rack. Using a separate housing for each device provides additional protection against physical damage and electromagnetic interference, improving the reliability and longevity of the devices. Furthermore, the standardized housing size allows for efficient use of space within the IT rack, enabling more devices to be accommodated in a limited area.This arrangement also contributes to improved heat dissipation, as the enclosures are designed to allow optimal air or liquid circulation. The integration of a self-addressing bus system for the bus-connected direct liquid cooling units ensures that each unit automatically receives a unique address as soon as it is inserted into the IT rack. This significantly simplifies device configuration and management, as no manual addressing is required. Self-addressing also reduces the likelihood of address conflicts and facilitates system scalability, since new units can be easily added without altering existing configurations.The combination of standardized enclosures and an intelligent bus system improves the overall performance and efficiency of the IT infrastructure by simplifying the installation, maintenance, and expansion of devices, while ensuring reliable and consistent cooling. The ability to accommodate a large number of identical devices in a single IT rack offers the flexibility and adaptability to meet the evolving needs of the IT infrastructure.

[0020] According to one embodiment, the direct liquid cooling (DLC) arrangement for an IT infrastructure comprises hot-swappable direct liquid cooling devices, in particular the plug-in units. This hot-swap capability allows the plug-in units to be exchanged or replaced during operation without having to shut down the IT infrastructure. This is particularly advantageous for maintenance and component replacement, as it maximizes uptime and minimizes downtime. The hot-swap capability preferably refers to the connection of the plug-in units to a coolant circuit of the direct liquid cooling system and / or to a power supply, in particular to a DC power distribution system of the IT rack, preferably a DC busbar of the power distribution system. The connection to the coolant circuit enables continuous cooling of the IT infrastructure, even when individual plug-in units are being replaced.This helps maintain optimal operating temperature and prevents overheating, which could lead to hardware damage and data loss. Connecting to a DC power distribution system, particularly a DC busbar, ensures that the plug-in devices are always supplied with the necessary power, increasing the reliability and stability of the IT infrastructure. Using a DC busbar also offers the advantage of simplified cabling and more efficient power distribution, resulting in reduced energy loss and improved energy efficiency. Overall, hot-swapping capability enables flexible and efficient management of the IT infrastructure by allowing seamless integration and maintenance of cooling and power supply components.This leads to higher availability and reliability of IT systems, which is crucial in environments with high demands on uptime and performance.

[0021] According to one embodiment, the arrangement comprises an uninterruptible power supply (UPS) and / or a battery backup unit (BBU) specifically designed to supply the direct liquid cooling (DLC) devices with a DC voltage in the event of a primary power supply failure, particularly a failure of the DLC power supply unit. This configuration ensures that the cooling of the IT infrastructure is maintained continuously even during a power outage, which is crucial for preventing overheating and protecting sensitive IT components. The UPS and / or BBU are configured for seamless integration into the existing bus system, which enables self-addressing for the direct liquid cooling modules that can be connected to the bus.This means that the UPS and / or BBU are automatically detected and integrated into the system without requiring manual configuration. One advantage of this arrangement is the increased reliability and fault tolerance of the IT infrastructure, as continuous cooling is ensured even during power outages. Another advantage is the reduction of downtime and potential damage to the IT infrastructure, since the UPS and / or BBU immediately supply the necessary DC voltage to the direct liquid cooling devices. This helps maintain the optimal operating temperature of the IT components and prevents thermal damage that could be caused by sudden temperature increases. Furthermore, integrating the UPS and / or BBU into the bus system with self-addressing simplifies the installation and maintenance of the entire cooling system, as no additional configuration steps are required.This saves time and reduces system complexity, which is particularly beneficial in large data centers where numerous devices and components need to be managed. Providing an uninterruptible power supply for direct liquid cooling increases the overall operational reliability of the IT infrastructure, which is crucial for the continuous and reliable operation of data centers and other IT facilities. According to one embodiment, the arrangement includes an uninterruptible power supply (UPS) and / or a battery backup unit (BBU) that are hot-swappable. This means that these components can be replaced during operation without interrupting the IT infrastructure or the direct liquid cooling (DLC) system.Hot-swapping capability refers specifically to the connection to a power outlet and / or the IT rack's power distribution system, preferably using a DC bus bar. Hot-swapping offers the advantage of allowing maintenance or the replacement of defective components without downtime. This is particularly important in IT environments where high availability and reliability are essential. Using a DC bus bar ensures efficient and stable power distribution, further enhancing operational reliability. Integrating the UPS and / or BBU into the IT rack's power distribution system enables seamless and continuous power supply, even during power outages or fluctuations in the power grid. This contributes to increased operational reliability and helps prevent data loss.The combination of hot-swappability with direct liquid cooling (DLC) ensures optimal cooling of the IT infrastructure, even under high power demands, without interruptions. The bus system's self-addressing capability enables quick and easy integration of new plug-in devices, increasing the flexibility and scalability of the IT infrastructure. Overall, the described configuration offers a robust and flexible solution for powering and cooling IT infrastructures, improving both operational reliability and ease of maintenance.

[0022] According to one embodiment, the invention relates to an arrangement for direct liquid cooling (DLC) of an IT infrastructure, comprising at least one IT rack with multiple slots for plug-in devices intended for direct liquid cooling and / or the IT infrastructure. This arrangement includes a bus system with a control unit that provides a bus with multiple data interfaces for connecting plug-in direct liquid cooling devices. A key feature of this arrangement is the self-addressing of the plug-in devices connectable to the bus, enabling automatic identification and integration of the devices into the system. In a specific embodiment, several of the devices are configured as uninterruptible power supplies (UPS) and / or battery backup units (BBUs).These devices are preferably redundant and / or independently replaceable, meaning they can be operated in parallel to increase system reliability. Redundancy ensures that if one device fails, the others continue to provide power, maximizing uptime and reliability of the IT infrastructure. Device independence allows a single device to be replaced or serviced without interrupting the operation of the other devices or the entire system. This results in greater flexibility and ease of maintenance for the IT infrastructure. The combination of direct liquid cooling and redundant, replaceable power supplies offers an efficient solution for cooling and powering IT systems, particularly in data centers where high power density and continuous operation are critical.The self-addressing capability of the plug-in devices also simplifies the management and monitoring of connected devices, as they are automatically detected and integrated into the control system. This reduces manual effort and the potential for errors during device installation and configuration. Overall, this arrangement offers improved reliability, efficiency, and maintainability for IT infrastructures, especially in demanding environments such as data centers.

[0023] In one embodiment, the arrangement comprises a control unit that is integrated into one of the direct liquid cooling units or is designed as a plug-in unit. This control unit / plug-in unit is designed to be hot-swappable, meaning it can be replaced during operation without having to shut down the entire system. This hot-swap capability refers in particular to the connection to the bus and / or the power supply, with a preferred embodiment including connection to a DC power distribution system of the IT rack, in particular to a DC bus of the power distribution system. The term "hot-swappable" describes the ability to change components during operation, which significantly simplifies maintenance and parts replacement and minimizes system downtime.Connecting to the bus enables seamless communication and control of the plug-in devices, while connecting to the power supply ensures a continuous power supply. Using a DC power distribution system, particularly a DC busbar, offers the advantage of a more efficient and stable power supply, as DC systems typically exhibit lower energy losses and higher reliability. These features contribute to increased operational efficiency and reliability of the IT infrastructure by ensuring continuous cooling and control of the plug-in devices. Furthermore, the self-addressing capabilities of the plug-in devices allow for automatic configuration and integration into the system, further simplifying installation and operation.The combination of these features results in a robust and flexible solution for the direct liquid cooling of IT infrastructures, improving both performance and maintainability.

[0024] According to one embodiment, the invention relates to an arrangement for the direct liquid cooling of an IT infrastructure, comprising several plug-in devices, at least one of which is a power supply unit (PSU). This power supply unit is designed to be hot-swappable, meaning that it can be replaced during operation without having to shut down the entire system. This is particularly advantageous for maintaining uptime and minimizing downtime in critical IT environments. The hot-swappability refers both to the connection to a power outlet and to the connection to a DC power distribution system of the IT rack, preferably a DC busbar of the power distribution system.This arrangement enables flexible and efficient power management within the IT rack, as the PSU can be quickly and easily replaced when needed without affecting the operation of other components. Integrating a DC bus into the power distribution simplifies cabling and reduces energy losses, resulting in higher energy efficiency and improved overall system performance. Furthermore, using a DC bus facilitates system scalability, as additional PSUs or other components can be easily added. The combination of these features contributes to increased reliability and flexibility of the IT infrastructure, which is particularly important in data centers and other environments with high availability and performance requirements.The ability to hot-swap PSUs without interrupting operations is a significant advantage, simplifying maintenance and component replacement and maximizing uptime. Furthermore, direct liquid cooling enables efficient heat dissipation, resulting in improved cooling performance and extended component lifespan. Self-addressing of the plug-in units within the bus system further simplifies installation and configuration, as the devices are automatically detected and addressed, reducing administrative overhead and accelerating commissioning. Overall, this configuration provides a robust and flexible solution for cooling and powering IT infrastructures, improving both efficiency and reliability.In one embodiment, the arrangement comprises a power supply unit (PSU) with multiple redundant and independently replaceable power supplies. These power supplies are designed to operate and be maintained independently, thus increasing the reliability and maintainability of the entire IT infrastructure. The bus system is preferably configured to address the power supplies independently. This means that each power supply receives its own unique address in the bus system, enabling targeted communication and control. This addressing capability of the bus system ensures that, in the event of a power supply failure, the other power supplies remain operational and maintain the power supply to the IT infrastructure.One advantage of this arrangement is increased reliability, as the redundant power supplies can take over the power supply in the event of a single power supply failure, without interrupting the operation of the IT infrastructure. Another advantage is simplified maintenance and replacement of the power supplies, since they can be addressed and therefore replaced independently without affecting the operation of the entire IT infrastructure. The self-addressing capability of the bus system further contributes to the flexibility and scalability of the arrangement, as new power supplies or other plug-in devices can be easily integrated into the existing system without requiring manual configuration. This reduces administrative overhead and the potential for errors during the installation and maintenance of the IT infrastructure.The combination of redundant power supplies and an intelligent bus system that enables independent addressing thus represents a robust and efficient solution for the direct liquid cooling and power supply of IT infrastructures.

[0025] In one embodiment, the arrangement features a DC power supply for plug-in devices housed in the slots, preferably comprising a rectifier and a power distribution unit. This power distribution unit, preferably in the form of a busbar, runs vertically along the rear of the IT rack and is supplied with DC voltage by the rectifier. A plug-in direct liquid cooling unit is housed in one of the slots and electrically connected to the power distribution unit. This enables an efficient and reliable DC power supply to the plug-in devices. The rectifier converts AC to DC and makes it available to the busbar running along the rear of the IT rack. This offers the advantage of a centralized and consistent power supply, simplifying the installation and maintenance of the plug-in devices.Electrically connecting the plug-in units to the power distribution system enables seamless integration and reliable operation of the direct liquid cooling. Positioning them along the rear of the IT rack also optimizes space requirements and improves accessibility for maintenance. A further advantage is the reduction of cable clutter and the minimization of potential sources of error due to loose or faulty connections. Using a busbar along the rear of the IT rack contributes to a structured and organized arrangement of components, increasing the efficiency and reliability of the entire IT infrastructure. Integrating the DC power supply into the arrangement also improves energy efficiency, as DC systems generally have lower energy losses than AC systems.The combination of these features results in a robust and efficient solution for the direct liquid cooling of IT infrastructures, improving both operational reliability and ease of maintenance.

[0026] According to one embodiment of the invention, the arrangement relates to a direct liquid cooling (DLC) system for an IT infrastructure, comprising at least one IT rack with multiple slots for plug-in direct liquid cooling units and / or IT infrastructure components. This arrangement includes a bus system with a control unit that has a bus with multiple data interfaces for connecting plug-in direct liquid cooling units. The bus system features self-addressing for plug-in direct liquid cooling units that can be connected to the bus. In this specific embodiment, a plurality of first blind-connector plug-in connectors for tool-free connection of direct liquid cooling modules and / or IT infrastructure components to the power distribution system are arranged vertically spaced apart along the power distribution board.These blanking plug connectors enable quick and easy installation and replacement of components without the need for special tools. This significantly reduces installation and maintenance times. The vertical arrangement of the blanking plug connectors along the power distribution ensures an even distribution of electrical connections across the entire height of the IT rack, allowing for flexible and modular expansion of the IT infrastructure. This is particularly advantageous in data centers where high density and scalability of IT components are required. Furthermore, the tool-free connection minimizes the risk of damage to the connectors, increasing the reliability and lifespan of the entire IT infrastructure.Integrating these blind-type connectors into the power distribution system also contributes to improved energy efficiency, as electrical connections are optimized and losses are minimized. Overall, this design offers improved ease of use, flexibility, and efficiency in the installation and maintenance of IT infrastructures that utilize direct liquid cooling.

[0027] According to one embodiment of the invention, the arrangement relates to a direct liquid cooling (DLC) system for an IT infrastructure, comprising at least one coolant distribution channel running along the rear of the IT rack in the vertical direction of the IT rack. Along this coolant distribution channel, several secondary blind coupling connectors are arranged at vertical intervals, enabling tool-free connection of direct liquid cooling modules and / or IT infrastructure components to the coolant distribution channel. The coolant distribution channel serves as a central conduit for distributing the coolant to the various modules within the IT rack, ensuring efficient and uniform cooling of the IT components.The second set of blind coupling connectors enables quick and easy connection of the assemblies to the coolant distribution channel without the need for tools, significantly simplifying maintenance and component replacement. This results in reduced downtime and increased operational efficiency of the IT infrastructure. The arrangement of the blind coupling connectors along the vertical axis of the coolant distribution channel ensures that the coolant supply is evenly distributed and that each assembly is optimally cooled, regardless of its position in the IT rack. This is particularly advantageous in data centers, where uniform cooling of IT components is crucial for maintaining system performance and reliability. Furthermore, the tool-free connection allows for flexible adaptation and expansion of the IT infrastructure, as assemblies can be added or removed quickly and easily.This is particularly useful in dynamic IT environments where frequent changes and adjustments are required. Overall, this arrangement offers improved cooling performance, simplified maintenance, and increased flexibility, resulting in an optimized operating environment for IT infrastructures.

[0028] In one embodiment, the arrangement features a linear guide for direct liquid cooling assemblies and / or IT infrastructure components, with the linear guide extending parallel to the insertion direction of the first and / or second blind coupling connectors. The linear guide enables precise and low-friction movement of the modules, significantly simplifying installation and maintenance. The parallel alignment to the insertion direction of the blind coupling connectors ensures that the modules can be inserted accurately and securely into their designated positions, guaranteeing a reliable connection of the coolant and data lines. This minimizes the risk of incorrect connections and leaks, thereby increasing the operational reliability and efficiency of the direct liquid cooling system.The linear guide also ensures an even distribution of mechanical loads across the modules, thus supporting the structural integrity of the IT infrastructure. Integrating the linear guide into the assembly also improves the modularity and flexibility of the IT infrastructure, as modules can be quickly and easily replaced or added without requiring extensive adjustments or alignment. This is particularly advantageous in data centers, where rapid scalability and adaptability to changing requirements are crucial. The linear guide therefore contributes to optimized use of available space and more efficient cooling of IT components, ultimately increasing the overall performance and energy efficiency of the IT infrastructure.

[0029] According to one embodiment, the direct liquid cooling (DLC) arrangement for an IT infrastructure comprises several plug-in units, each housed in a separate slot, with at least two of these plug-in units being configured as redundant units, preferably as redundant pump units (RPUs). The redundant units provide increased reliability and fault tolerance for the cooling arrangement by ensuring that, in the event of a pump unit failure, another pump unit can automatically take over the cooling function. This is particularly important in IT infrastructures, where continuous operation and constant cooling are crucial to guaranteeing the functionality and lifespan of the IT components.The redundant pump units are designed for seamless integration into the existing bus system, which features self-addressing for the plug-in devices connected to the bus. This enables quick and easy installation and replacement of the plug-in devices without the need for manual configuration or addressing. Self-addressing helps reduce the complexity of system integration and increases ease of maintenance. Furthermore, the redundant design of the pump units ensures a uniform distribution of coolant flow, resulting in more efficient and consistent cooling of the IT components. This can help prevent hotspots and minimize the thermal stress on the components. Another advantage of the redundant pump units is the ability to perform maintenance without interrupting the operation of the entire cooling system.One pump unit can be serviced or replaced while the other continues to maintain the cooling circuit. This results in higher availability and reliability of the entire system. The redundant pump units can also be configured to operate alternately during normal operation to ensure even wear and a longer service life. Overall, the redundant rack-mounted devices, especially the redundant pump units, contribute to a more robust and efficient cooling arrangement that meets the demands of modern IT infrastructures.

[0030] In one embodiment, the arrangement for direct liquid cooling of an IT infrastructure is designed such that the rectifier, also known as a power supply unit (PSU), is designed as a plug-in device that is installed in one of the provided slots. This specific design allows for seamless integration of the rectifier into the existing structure of the IT rack, increasing the modularity and flexibility of the IT infrastructure. The rectifier, housed in a plug-in device, can be easily replaced or serviced without having to disassemble the entire arrangement. This leads to a significant reduction in downtime and maintenance costs. Furthermore, integrating the rectifier into the plug-in structure enables efficient use of the available space within the IT rack, resulting in a more compact and space-saving design.Another advantage of this configuration is improved heat dissipation, as the rectifier is directly integrated into the liquid cooling system. This results in more efficient cooling and a longer lifespan for the electronic components. The use of a self-addressing bus system for the plug-in devices ensures that the rectifier and other components are automatically detected and configured, simplifying installation and operation. This self-addressing minimizes the need for manual settings and reduces the risk of commissioning errors. Integrating the rectifier as a plug-in device also improves the scalability of the IT infrastructure, as additional rectifiers can be easily added as needed to meet power requirements.This is particularly advantageous in data centers and other IT environments where power supply requirements are dynamic and often unpredictable. Overall, this configuration offers improved efficiency, flexibility, and reliability for direct liquid cooling of IT infrastructures, making it an attractive solution for modern data centers and other demanding IT environments.

[0031] According to one embodiment, the dependent claim describes an arrangement in which the at least one plug-in device of the direct liquid cooling (DLC) system is a coolant distribution unit (CDU) or at least one assembly of a coolant distribution unit (CDU). This specific configuration enhances the functionality of the liquid cooling integrated into the IT infrastructure by enabling precise and efficient distribution of the coolant within the system. A coolant distribution unit (CDU) is a key component in liquid cooling systems that ensures the coolant is distributed to the various parts of the IT infrastructure in the correct quantities and at the required temperature. Integrating such a CDU or its assemblies into the arrangement significantly increases cooling efficiency, as the coolant flows can be optimized and the thermal loads can be better distributed.This leads to improved temperature control and a reduction in hotspots within the IT racks, which in turn increases the reliability and lifespan of the IT components.

[0032] The use of a self-addressing bus system for the bus-connected plug-in units of the direct liquid cooling system enables seamless and automatic integration of the CDU into the overall system. This means that the CDU or its components can be automatically detected and integrated into the control system without any manual configuration or intervention. Self-addressing simplifies the installation and maintenance of the coolant distribution unit by eliminating the need for manual addressing and configuration. This saves time and reduces the risk of errors that could result from manual intervention.

[0033] Another advantage of this arrangement is the increased flexibility and scalability of the cooling system. Since the CDU or its components can be integrated into IT racks as plug-in units, the cooling system can be expanded or adapted as needed without requiring extensive modifications or reconfigurations. This is particularly beneficial in data centers or other rapidly changing or growing IT environments, as it allows for quick and easy adjustments to cooling capacity.

[0034] In summary, integrating a coolant distribution unit or its components as a slide-in device into the direct liquid cooling system offers significant advantages in terms of efficiency, flexibility, and ease of maintenance. The automatic self-addressing of the bus system further enhances the user-friendliness and reliability of the overall system by simplifying and accelerating the installation and integration of the coolant distribution unit.

[0035] According to one embodiment, the arrangement for direct liquid cooling of an IT infrastructure comprises a specific configuration in which at least one component of the coolant distribution unit, preferably a control unit and / or an expansion vessel of the coolant distribution unit, is located outside a housing of the coolant distribution unit and inside or outside the IT rack. This arrangement allows for a flexible and modular design of the coolant distribution unit, resulting in improved maintainability and accessibility. By placing the control unit and / or the expansion vessel outside the housing of the coolant distribution unit, the physical space within the housing is optimized, thus achieving more efficient use of the available space.This is particularly advantageous in densely packed IT racks, where space is limited and efficient space utilization is crucial for the performance and maintenance of the IT infrastructure. Furthermore, the external placement of these components allows for simpler and faster maintenance, as technicians have direct access to the critical parts of the coolant distribution unit without having to open or disassemble the entire enclosure. This reduces downtime and increases the uptime of the IT infrastructure. Another benefit of this configuration is improved heat dissipation, as the external components can be better ventilated, thus ensuring more efficient cooling. The ability to place the control unit and / or the expansion vessel both inside and outside the IT rack offers additional flexibility in designing and adapting the IT infrastructure to specific requirements and spatial constraints.This flexibility is particularly useful in data centers that are frequently rebuilt or expanded, as the coolant distribution unit can be easily adapted to new configurations without requiring extensive modifications. The integration of a self-addressing bus system for the bus-connected direct liquid cooling units also contributes to the efficiency and flexibility of the entire setup, as the units can be automatically detected and configured, further reducing installation and maintenance effort. Overall, this specific configuration results in improved efficiency, flexibility, and maintainability of the IT infrastructure, which is of paramount importance in modern data centers.

[0036] According to one embodiment, the arrangement comprises a coolant distribution unit (CDU), which includes at least one assembly that is a control unit for the coolant distribution unit. This control unit is electrically connected to the power distribution system and is preferably designed as a plug-in device that is accommodated in one of the slots. The specific communication mechanisms or means of interaction between the components of the arrangement include a bus system with a control unit that has a bus with multiple data interfaces for connecting plug-in devices for direct liquid cooling. The bus system enables self-addressing for the plug-in devices that can be connected to the bus. This self-addressing significantly simplifies the installation and configuration of the plug-in devices, as they are automatically detected and addressed without the need for manual configuration.The coolant distribution unit's control unit, designed as a slide-in device, can be easily installed in one of the designated slots, increasing the modularity and flexibility of the entire system. Electrical connection to the power distribution system ensures a continuous power supply for the control unit, enabling reliable control of the coolant distribution. This arrangement offers several advantages, including simplified installation and maintenance of the coolant distribution unit, as the control unit is easily accessible and replaceable due to its slide-in design. Furthermore, the electrical connection to the power distribution system allows for a centralized power supply, increasing the efficiency and reliability of the coolant distribution. Integrating the control unit into the system's slots saves space and enables a compact design for the entire IT infrastructure.Overall, this embodiment leads to improved handling and management of the coolant distribution unit within the IT infrastructure, contributing to optimized cooling performance and increased operational efficiency.

[0037] According to one embodiment, the arrangement comprises a coolant distribution unit (CDU), which is an essential component for the direct liquid cooling (DLC) of the IT infrastructure. This coolant distribution unit includes at least one assembly referred to as an expansion vessel. The expansion vessel is fluidically connected to a coolant distribution channel of the direct liquid cooling system, meaning that it is in direct contact with the cooling circuit and thus ensures a continuous and efficient distribution of the coolant. It is particularly preferred that the expansion vessel be located outside the IT rack, which offers several advantages. First, this arrangement allows for easier maintenance and inspection of the expansion vessel, as it is not located within the confined space of the IT rack.Secondly, the external placement of the expansion vessel helps reduce the thermal load within the IT rack, as the vessel itself can absorb and dissipate a certain amount of heat. Thirdly, the external arrangement facilitates the integration and replacement of the expansion vessel without significantly impacting the operation of the IT infrastructure. The expansion vessel plays a crucial role in compensating for coolant volume changes caused by temperature variations. This is particularly important for maintaining stable pressure in the cooling circuit, thus ensuring the efficiency and reliability of the cooling system. The direct fluidic connection to the coolant distribution channel ensures that the expansion vessel can respond quickly and effectively to changes in coolant volume.These features contribute overall to improved performance and reliability of direct liquid cooling, which in turn increases the uptime and efficiency of the IT infrastructure.

[0038] According to one embodiment, the dependent claim describes an arrangement in which several coolant distribution unit (CDU) modules are accommodated as individual plug-in units, each in its own slot. This specific configuration enables a modular and flexible design of the coolant distribution within an IT rack. The coolant distribution unit (CDU) is a central component in direct liquid cooling (DLC) systems and serves to efficiently distribute and regulate the coolant. By dividing the CDU into several modules, which are housed as separate plug-in units in the slots of the IT rack, improved scalability and ease of maintenance are achieved. Each module can be installed, maintained, or replaced independently without having to take the entire cooling system out of service. This results in increased uptime and reliability of the IT infrastructure.Furthermore, the modular design allows for easier adaptation and expansion of the cooling system, as additional modules can be easily added as cooling requirements increase. Integrating the modules as plug-in units into the existing slots of the IT rack ensures space-saving and efficient use of available space. Moreover, the use of a self-addressing bus system ensures that the new modules are automatically detected and integrated into the existing system, further simplifying installation and configuration. Another advantage of this arrangement is the ability to focus cooling capacity on specific areas of the IT rack by strategically placing the CDU modules in the slots. This results in optimized cooling performance and improved temperature control within the IT rack.The described features contribute overall to improved efficiency, flexibility and maintainability of direct liquid cooling in IT infrastructures.

[0039] According to one embodiment, the arrangement comprises a coolant distribution unit (CDU) containing modules designed as individual plug-in units. These modules of the coolant distribution unit include at least two identical or structurally identical modules, preferably several identical or structurally identical pump units (RPUs). Particularly preferably, at least two of these identical or structurally identical pump units are configured as redundant pump units. The integration of redundant pump units offers several advantages. First, redundancy increases the reliability of the system, since if one pump unit fails, the other pump unit can continue to operate, thus minimizing downtime and improving the operational reliability of the IT infrastructure. Second, the use of identical pump units enables simpler maintenance and interchangeability, as spare parts and maintenance procedures can be standardized.This reduces the complexity and cost of maintenance. Thirdly, the load can be distributed evenly across the pump units, extending the service life of each unit and increasing the efficiency of the cooling system. The identical or structurally identical modules also facilitate system scalability, as additional pump units can be easily integrated to meet cooling demands as IT loads increase. The self-addressing bus system allows the pump units to be automatically detected and integrated into the control system, simplifying installation and configuration. The combination of these features results in a robust, efficient, and easily maintainable solution for direct liquid cooling in IT infrastructures.

[0040] According to one embodiment, the direct liquid cooling (DLC) arrangement for an IT infrastructure comprises a plug-in unit, which constitutes a direct liquid cooling assembly and has a housing in which at least two redundant, preferably parallel-connected, pumps are arranged. These pumps are responsible for circulating the coolant through the system, thus ensuring efficient heat dissipation from the IT components. The redundancy of the pumps offers a crucial advantage in terms of the system's reliability and fault tolerance. Should one of the pumps fail, the other pump can continue to operate, thus ensuring uninterrupted cooling of the IT infrastructure. This is particularly important in critical IT environments, where a cooling failure could lead to significant damage or data loss.The housing of the rack-mount unit is designed to contain no compressors, expansion vessels, or condensers, and is preferably free of all other active components of a chiller. This design simplifies the design and maintenance of the cooling system, as there are fewer complex and vulnerable components. Furthermore, this reduces energy consumption and operating costs, since no additional active cooling elements are required. Direct liquid cooling offers higher efficiency compared to conventional air cooling systems because liquids have a higher heat capacity and can therefore dissipate more heat per unit volume. This allows for denser packing of IT components and better utilization of available space in the IT rack.Integrating a bus system with a control unit that enables self-addressing for the plug-in units connected to the bus simplifies the installation and operation of the cooling units. Self-addressing ensures that each plug-in unit is automatically detected and configured, further simplifying system setup and maintenance. Overall, this configuration offers an efficient, reliable, and easy-to-maintain solution for cooling IT infrastructures that meets the demands of modern data centers.

[0041] In one embodiment, the arrangement for direct liquid cooling of an IT infrastructure comprises a housing in which a heat exchanger is integrated. This heat exchanger is designed to circulate the coolant through an inner circuit, employing redundant pumps to efficiently circulate the coolant. These redundant pumps offer increased reliability and fault tolerance, as they ensure continuous coolant circulation even if one of the pumps fails. The heat exchanger can be configured as a liquid-to-liquid heat exchanger, meaning it transfers heat between two liquid circuits. An outer circuit of the liquid-to-liquid heat exchanger can be connected to a recooler, which further cools the coolant before it is returned to the inner circuit of the heat exchanger.This configuration enables efficient heat dissipation from the IT infrastructure, as the coolant is continuously cooled and reused. The use of a recooler in the outer loop offers the advantage of maintaining the coolant temperature at an optimal level, which increases cooling efficiency and extends the lifespan of the IT components. The combination of a heat exchanger, redundant pumps, and a recooler ensures effective and reliable coolant circulation, resulting in stable and efficient cooling of the IT infrastructure. A further advantage of this arrangement is its flexibility, as the outer loop of the liquid-to-liquid heat exchanger can be connected to different types of recoolers as needed to meet varying cooling requirements.This flexibility allows the cooling capacity to be adapted to specific needs, thus offering a tailored solution for various IT infrastructures. Furthermore, the self-addressing of the bus system simplifies the installation and operation of the plug-in units, as they are automatically detected and configured, reducing the effort required for manual configuration and increasing operational reliability.

[0042] According to one embodiment, the arrangement comprises a housing which has on its outer surface at least a first supply line and a first return line for connecting the inner circuit to a coolant distribution channel of the direct liquid cooling system, an electrical contact for electrical connection to the power distribution system, and, if the heat exchanger is a liquid-to-liquid heat exchanger, preferably a second supply line and a second return line for connecting the outer circuit to a recooler, wherein preferably all of the supply lines and returns as well as the electrical contact are designed as blind coupling connectors. The first supply line and the first return line enable the circulation of the coolant within the inner circuit of the direct liquid cooling system, which ensures efficient heat dissipation from the IT components.The electrical contact ensures a reliable power supply for the plug-in devices, which is essential for the continuous operation of the IT infrastructure. The second supply and return lines, used in a liquid-to-liquid heat exchanger, allow the external circuit to be connected to a recooler, enabling the dissipated heat to be released into the environment. The use of blanking plug connectors for all supply and return lines, as well as the electrical contact, offers several advantages. First, these connectors facilitate the quick and secure connection and replacement of the plug-in devices, as they establish an automatic connection without requiring manual intervention. This significantly reduces installation and maintenance times and minimizes the risk of errors or leaks.Secondly, blind coupling connectors ensure a reliable and leak-proof connection, which is crucial for the safe operation of direct liquid cooling and the prevention of coolant losses. Thirdly, they contribute to the modularity and flexibility of IT infrastructure, as they allow for easy replacement and expansion of systems without the need for extensive modifications. Overall, these features significantly improve the efficiency, reliability, and maintainability of direct liquid cooling in IT infrastructures.

[0043] According to one embodiment, the arrangement describes an IT infrastructure cooled by direct liquid cooling (DLC) and comprising a bus system with a control unit that enables self-addressing for connectable plug-in devices. The dependent claim extends this arrangement by specifying that the IT rack slots can accommodate or accommodate additional plug-in devices, which can be either servers or uninterruptible power supplies (BBUs). This extension introduces specific communication mechanisms and means of interaction between the IT infrastructure components. The ability to integrate additional servers or BBUs into the slots significantly increases the flexibility and scalability of the IT infrastructure. Servers provide computing power and storage resources, while BBUs ensure a continuous power supply, even during a power outage.Integrating these devices into the existing self-addressing bus system simplifies the management and monitoring of the entire IT infrastructure. Self-addressing allows the new plug-in devices to automatically identify and configure themselves within the network, reducing installation and maintenance efforts. Furthermore, direct liquid cooling improves the thermal efficiency of the IT infrastructure by dissipating heat directly from critical components. This results in better cooling performance and higher energy efficiency compared to conventional air cooling systems. The combination of direct liquid cooling and the ability to accommodate additional servers and BBUs provides a robust and adaptable solution for modern data centers with demanding performance and reliability requirements.Integrating BBUs ensures that the IT infrastructure remains operational even during power outages, thus increasing the reliability and availability of services. Overall, this configuration brings improved efficiency, flexibility, and reliability to IT infrastructures that rely on direct liquid cooling.

[0044] According to one embodiment, the arrangement for direct liquid cooling (DLC) of an IT infrastructure comprises at least one additional plug-in device, preferably a coolant-carrying assembly of a coolant distribution unit for direct liquid cooling, and more preferably a heat exchanger or an expansion vessel. These additional plug-in devices are mounted in one of the slots without contact to the power distribution, preferably a busbar. The term "contactless" means that the plug-in device has no direct electrical connection to the power distribution, thus minimizing the risk of short circuits and electrical interference. The coolant-carrying assembly, such as a heat exchanger, is a device that transfers heat from one medium to another without the media mixing. An expansion vessel, on the other hand, serves to compensate for volume fluctuations in the coolant circuit caused by temperature changes.Integrating such devices into the arrangement enables more efficient and flexible coolant distribution within the IT infrastructure. One advantage of this arrangement is improved modularity and ease of maintenance, as the plug-in devices can be easily replaced or serviced without affecting the overall power distribution. Furthermore, the contactless mounting contributes to the system's safety and reliability by reducing potential electrical hazards. Using a busbar for power distribution offers the benefit of a consistent and stable power supply to the various plug-in devices. This is particularly important in IT infrastructures, where a constant and reliable power supply is essential for the operation of the equipment.Overall, this arrangement offers improved efficiency and flexibility in the direct liquid cooling of IT infrastructures by facilitating the integration and operation of additional coolant-carrying assemblies while increasing the safety and reliability of the system.

[0045] According to one embodiment, the arrangement refers to an IT infrastructure in which the IT rack's slots exclusively accommodate direct liquid cooling units. This specific configuration ensures that all components within the IT rack are optimized for direct liquid cooling. Direct liquid cooling (DLC) is a method in which liquid is applied directly to the components to be cooled in order to efficiently dissipate the heat generated. By exclusively using units designed for direct liquid cooling, a homogeneous cooling environment is created, enabling improved heat dissipation. This results in higher cooling efficiency and can extend the service life of the IT components, as they operate consistently within an optimal temperature range.Another advantage of this configuration is the simplified maintenance and component replacement, as all rack-mounted units operate on the same cooling principle and are therefore compatible. This reduces complexity and the need for different cooling methods within a single rack. The bus system's self-addressing capability also enables automatic detection and configuration of connected rack-mounted units, further reducing installation and maintenance effort. Integrating a bus system with a control unit and multiple data interfaces allows for centralized control and monitoring of the cooling units, resulting in improved control and optimization of cooling performance. The combination of these features provides a solution that enhances both the efficiency and reliability of cooling in IT infrastructures.

[0046] According to one embodiment, the arrangement for the direct liquid cooling of an IT infrastructure comprises at least one IT rack with multiple slots for plug-in devices intended for direct liquid cooling and / or the IT infrastructure. This arrangement includes a bus system with a control unit, which comprises a bus with multiple data interfaces for connecting plug-in devices for direct liquid cooling. The bus system is designed to enable self-addressing for the plug-in devices that can be connected to the bus. In this particular embodiment, at least one of the plug-in devices can be a heat exchanger, preferably a liquid-to-liquid heat exchanger, an expansion vessel, a pump unit, a control unit, or a DC power supply.These specific plug-in components fulfill various functions within the system and contribute to the efficiency and effectiveness of direct liquid cooling. The heat exchanger, particularly the liquid-to-liquid heat exchanger, enables the efficient transfer of heat between two liquid circuits, increasing cooling capacity and reducing the operating temperatures of the IT infrastructure. The expansion vessel compensates for volume fluctuations in the coolant circuit, improving the system's stability and reliability. The pump unit ensures the necessary circulation of the coolant through the system, guaranteeing continuous heat dissipation. The control unit regulates and monitors the various components and processes within the system, enabling precise control and adjustment of the cooling capacity.The DC power supply provides the necessary electrical energy for the various components of the array, ensuring a stable and reliable power supply. Integrating these specific plug-in devices into the array offers several advantages, including improved cooling performance, increased system stability and reliability, and more efficient power supply and utilization. Furthermore, self-addressing within the bus system simplifies the installation and configuration of the plug-in devices, increasing the flexibility and scalability of the array. This enables quick and easy adaptation of the IT infrastructure to changing requirements and load conditions.

[0047] According to one embodiment, the arrangement for direct liquid cooling (DLC) of an IT infrastructure comprises at least two different plug-in units, each inserted into one of the slots. This specific configuration enables a flexible and scalable cooling architecture within an IT rack. The different plug-in units can perform various functions, such as cooling high-performance processors, memory components, or other critical IT components. The use of a bus system with a control unit that provides a bus with multiple data interfaces for connecting the plug-in units enables efficient communication and control of the cooling parameters.The self-addressing of the bus-connected plug-in devices ensures automatic and error-free identification and integration of the devices into the system, significantly simplifying installation and maintenance. One advantage of this arrangement is the improved thermal management capacity, as direct liquid cooling offers more efficient heat dissipation compared to conventional air cooling systems. Another benefit is the reduction of hotspots within the IT rack, leading to increased reliability and a longer lifespan for the IT components. The ability to use different plug-in devices allows for customized cooling solutions tailored to the specific requirements of each IT infrastructure. This can optimize energy efficiency, as only the cooling capacity actually needed is provided.Furthermore, the modular design contributes to the system's flexibility and expandability, as additional plug-in units can be easily added or replaced as needed. The integration of a self-addressing bus system also simplifies the management and monitoring of cooling parameters, since all relevant data can be centrally collected and analyzed. This enables proactive maintenance and early detection of potential problems, thus increasing operational reliability. Overall, this arrangement offers a highly adaptable and efficient solution for cooling IT infrastructures, meeting the increasing demands for performance and reliability. According to one embodiment, the arrangement relates to direct liquid cooling (DLC) for an IT infrastructure comprising several assemblies, with at least two of these assemblies configured as different plug-in units.This arrangement enables improved cooling of IT components through the use of liquid as the cooling medium, offering higher efficiency and better heat dissipation compared to conventional air cooling systems. The various plug-in units, functioning as modules, can perform different functions within the cooling system, such as distributing the coolant, monitoring the temperature, or controlling the fluid flow. This modular design allows for flexible adaptation and expansion of the system, as different plug-in units can be added or replaced as needed. The arrangement includes a bus system with a control unit that provides a bus with multiple data interfaces for connecting the plug-in units.The bus system features self-addressing, allowing plug-in units to automatically identify and configure themselves upon connection. This significantly simplifies the installation and maintenance of the cooling systems, eliminating the need for manual addressing or configuration. Self-addressing also helps reduce errors that could arise from incorrect wiring or configurations. An advantage of this design is improved scalability, as additional plug-in units can be easily integrated without requiring extensive modifications to the existing system. Another benefit is increased cooling reliability and efficiency, since direct liquid cooling provides more uniform and effective heat dissipation.The use of different plug-in units also allows for specialized and optimized cooling for various components of the IT infrastructure, resulting in overall improved performance and a longer lifespan for the IT equipment. The integration of self-addressing in the bus system ensures smooth and efficient communication between components, further enhancing the overall performance of the cooling system.

[0048] According to one embodiment, the arrangement for direct liquid cooling of an IT infrastructure comprises a variety of specific plug-in units that contribute to optimizing cooling performance and monitoring operating parameters. These plug-in units include a coolant pump unit, preferably equipped with redundant pumps to ensure high reliability and fault tolerance. A heat exchanger is also included to efficiently transfer heat between the coolant and the ambient air. An expansion vessel accommodates volume changes of the coolant due to temperature variations, thus stabilizing the pressure in the system. Pressure and temperature sensors are integrated to continuously monitor operating conditions and ensure that the system operates within optimal parameters.A three-way valve with a bypass valve allows for flexible control of the coolant flow, facilitating adaptation to varying cooling requirements. An AC power supply provides the necessary electrical energy for the various components, while a control unit monitors and controls the entire system. A service valve enables maintenance and component replacement without interrupting operation. A filter, preferably a filter fan, removes contaminants from the coolant to increase system efficiency and lifespan. An automatic air vent removes trapped air from the cooling circuit, improving cooling performance and preventing cavitation in the pumps. Finally, a pressure relief valve limits the maximum system pressure, ensuring the safety and integrity of the system.These specific communication mechanisms and means of interaction between components enable efficient and reliable liquid cooling of the IT infrastructure. The new features offer the advantages of improved monitoring and control of cooling performance, increased reliability through redundant pumps, and flexible adaptation to varying cooling requirements. Furthermore, they contribute to the system's safety and ease of maintenance by stabilizing operating conditions and simplifying servicing.

[0049] According to one embodiment, the invention relates to an arrangement for the direct liquid cooling (DLC) of an IT infrastructure, in which the plug-in units are designed to be hot-swappable, preferably with respect to a connection to a coolant circuit of the direct liquid cooling system and / or a connection to a power supply. Hot-swappable plug-in units make it possible to replace or add them during the operation of the IT infrastructure without having to shut down the entire system. This is particularly advantageous in data centers or other IT environments where high availability and minimal downtime are crucial. The ability to replace plug-in units while the system is running reduces the need for scheduled maintenance windows and minimizes operational interruptions.Connecting to the direct liquid cooling system's coolant circuit ensures that thermal efficiency and cooling performance are maintained even during equipment replacement or addition. This is particularly important because direct liquid cooling is an effective method for heat dissipation in high-performance IT environments, thus increasing the operational reliability and lifespan of IT components. Connecting to the power supply ensures that new or replaced modules are immediately operational, further enhancing the efficiency and flexibility of the IT infrastructure. Another benefit of hot-swapping capability is improved IT infrastructure scalability, as additional resources can be added quickly and without interrupting ongoing operations.This enables dynamic adaptation of IT resources to changing requirements and contributes to optimizing operating costs. The combination of these features results in a robust and flexible solution for the direct liquid cooling of IT infrastructures, significantly improving both maintainability and operational efficiency.

[0050] One embodiment describes an arrangement for the direct liquid cooling of an IT infrastructure, in which a pump unit for the direct liquid cooling is designed as one of the plug-in devices. This arrangement enables efficient and flexible cooling of IT components within an IT rack. The pump unit, designed as a plug-in device, can be easily integrated into the IT rack and replaced or serviced as needed. This offers the advantage of a modular design, allowing for easy adaptation and expansion of the cooling capacity. The pump unit is directly connected to the bus system, which supports self-addressing for the connected plug-in devices. This self-addressing simplifies the configuration and management of the cooling components, as the pump unit automatically receives a unique address in the bus system as soon as it is connected.This reduces manual effort and the potential for errors during the installation and commissioning of the cooling components. Furthermore, the direct integration of the pump unit into the bus system enables centralized control and monitoring of the cooling capacity. The bus system's control unit can receive and process data from the pump unit to optimize cooling performance in real time. This leads to improved energy efficiency and a longer lifespan for the IT components, as cooling can be adjusted according to demand. Another advantage of this arrangement is the reduction in space requirements within the IT rack, since the pump unit, as a plug-in device, occupies less space than conventional external pump systems. This allows for a higher packing density of IT components and more efficient use of available space in the data center.Integrating the pump unit into the IT rack also reduces the complexity of the cooling infrastructure, as fewer external connections and lines are required. This simplifies the installation and maintenance of the cooling components and contributes to lower overall costs. Overall, the described arrangement offers a flexible, efficient, and cost-effective solution for direct liquid cooling of IT infrastructures that meets the demands of modern data centers.

[0051] In one embodiment, the arrangement comprises a pump unit that forms several plug-in units, the plug-in units formed by the pump unit preferably being identical components. This specific configuration enables standardized and simplified integration of the cooling components into the IT infrastructure. The use of identical components for the plug-in units reduces the complexity of manufacturing and maintaining the arrangement, as identical components can be used. This simplifies not only production but also inventory management and the replacement of spare parts. The pump unit, which acts as the central component, enables efficient distribution of the coolant to the individual plug-in units, thereby ensuring uniform and effective cooling of the IT infrastructure.Integrating the pump unit into the plug-in units reduces space requirements and simplifies installation, as fewer separate components are needed. Another advantage of this arrangement is improved scalability, since additional plug-in units can be easily added without requiring extensive modifications to the existing infrastructure. The bus system's self-addressing capability enables automatic detection and configuration of connected plug-in units, further reducing installation effort and increasing flexibility. The use of a bus system with data interfaces ensures efficient communication between components, allowing for real-time monitoring and control of cooling performance. This contributes to optimizing operational efficiency and preventing overheating, thereby increasing the reliability and lifespan of the IT infrastructure.The combination of these features results in a robust, flexible and easy-to-maintain solution for the direct liquid cooling of IT infrastructures, which can be used in both small and large data centers.

[0052] According to one embodiment, the arrangement comprises several plug-in units that function as pump units (RPUs) and are designed as identical components. These identical components are preferably redundant with respect to their pumping capacity for a direct liquid cooling (DLC) coolant and can preferably be connected in series. The identical pump units offer the advantage of increased reliability and fault tolerance of the cooling system, as the redundancy ensures that the failure of a single pump unit does not lead to a complete failure of the cooling system. The possibility of connecting the pump units in series allows for flexible adaptation of the cooling capacity to the specific requirements of the IT infrastructure. The series connection enables an increase in the coolant flow rate, resulting in more efficient heat dissipation and thus improved cooling performance.This arrangement helps maintain optimal operating temperatures for the IT infrastructure, thereby increasing the lifespan and performance of IT components. Another advantage of using identical parts is the simplification of maintenance and replacement, as identical pump units are used, which can be easily replaced or serviced without the need to stock different spare parts. This reduces system complexity and the costs associated with spare parts and maintenance. The self-addressing of the bus system enables simple and automatic integration of the pump units into the overall system, minimizing installation effort and ensuring rapid commissioning of the cooling system.The bus system's data interfaces enable continuous monitoring and control of the pump units, allowing for precise regulation of cooling capacity and rapid response to changes in cooling demand. This contributes to optimized energy efficiency and reduced operating costs. Overall, the system offers a robust, flexible, and efficient solution for the direct liquid cooling of IT infrastructures, improving both operational reliability and the performance of the cooled IT components.

[0053] According to one embodiment, the invention relates to an arrangement for direct liquid cooling (DLC) of an IT infrastructure, comprising a plurality of plug-in units in an IT rack. These plug-in units are capable of forming a pump unit (RPU) responsible for cooling the IT infrastructure. A central element of this arrangement is the bus system with a control unit that enables self-addressing for the connected plug-in units. The specific communication mechanisms between the components of the arrangement are designed to ensure efficient and reliable interaction. The plug-in units of the pump unit are configured to continue providing the required pumping capacity even if one of the units fails. This means that the remaining functioning plug-in units are able to compensate for the cooling capacity lost due to the failure of a unit.This redundancy in the pump unit ensures that cooling of the IT infrastructure is maintained even in the event of a partial failure, thus increasing the reliability and availability of the entire IT infrastructure. Self-addressing in the bus system enables automatic detection and configuration of the connected plug-in units, simplifying installation and maintenance of the system and minimizing downtime. These features result in high flexibility and scalability of the cooling system, as new plug-in units can be easily added or replaced without requiring manual reconfiguration. The pump unit's ability to continue delivering the required pumping capacity in the event of a plug-in unit failure offers a significant advantage in terms of operational reliability and continuous cooling of the IT infrastructure.These redundancy mechanisms are particularly important in critical IT environments where uninterrupted cooling is crucial for smooth operation and preventing overheating damage. Overall, the described arrangement contributes to improving the operational efficiency, reliability, and maintainability of IT infrastructures that rely on direct liquid cooling.

[0054] According to one embodiment, the invention relates to an arrangement for the direct liquid cooling of an IT infrastructure, comprising an IT rack with multiple slots for plug-in direct liquid cooling units and / or an IT infrastructure. This arrangement includes a bus system with a control unit that has a bus with multiple data interfaces for connecting plug-in direct liquid cooling units. The bus system enables self-addressing for the plug-in direct liquid cooling units that can be connected to the bus. In this specific embodiment, at least one first plug-in direct liquid cooling unit is a coolant distribution unit (CDU), and the second is a component of a coolant distribution unit (CDU), wherein the first plug-in unit is independent of the component. This means that the coolant distribution unit functions as a self-contained module that operates independently of the component.The coolant distribution unit (CDU) is responsible for distributing coolant within the IT rack to ensure efficient heat dissipation from the electronic components. The coolant distribution unit assembly can offer additional functions or expansions that improve the performance or flexibility of the cooling system. Separating the coolant distribution unit from the assembly creates a modular structure that allows for easier maintenance and scalability. This makes it possible to replace or add individual components as needed without affecting the entire cooling system. One advantage of this arrangement is the increased flexibility and adaptability of the cooling system, as different configurations and expansions can be easily implemented.Another advantage is improved maintainability, as defective or outdated components can be easily replaced without interrupting the operation of the entire system. Furthermore, the modular design contributes to reduced downtime, as maintenance work can be carried out more quickly and efficiently. The self-addressing of the bus system facilitates the integration of new plug-in devices, as these are automatically detected and configured, simplifying the installation and commissioning of new components.

[0055] Overall, this arrangement offers a robust and flexible solution for direct liquid cooling in IT infrastructures, improving both efficiency and maintainability.

[0056] According to one embodiment of the invention, the arrangement relates to a direct liquid cooling (DLC) system for an IT infrastructure, wherein the arrangement comprises at least one IT rack with a plurality of slots for plug-in devices of a direct liquid cooling system and / or an IT infrastructure. The arrangement includes a bus system with a control unit that has a bus with a plurality of data interfaces for connecting plug-in devices of a direct liquid cooling system. The bus system is characterized in that it has self-addressing for plug-in devices of a direct liquid cooling system that can be connected to the bus.In a specific embodiment of this arrangement, at least one component of the coolant distribution unit (CDU), preferably a control unit and / or an expansion vessel of the coolant distribution unit, is located outside the housing of the first rack-mount device and either inside or outside the IT rack. This means that the coolant distribution unit, which is responsible for distributing and regulating the coolant within the system, can be flexibly positioned to ensure optimal cooling performance and ease of maintenance. The control unit, which manages the functionality and monitoring of the coolant distribution unit, can thus be positioned outside the housing of the first rack-mount device, facilitating access and maintenance.Similarly, the expansion vessel, which accommodates changes in coolant volume, can be flexibly positioned inside or outside the IT rack to optimize space requirements and coolant distribution efficiency. This arrangement allows for improved modularity and scalability of the IT infrastructure, as the components of the coolant distribution unit can be positioned independently of the rack's mounting location. One advantage of this configuration is increased flexibility during installation and maintenance of the coolant distribution unit, since the components are easily accessible and replaceable without disrupting the overall IT infrastructure. Another benefit is the ability to adapt cooling capacity to specific IT infrastructure requirements by optimizing the coolant distribution unit's positioning. This results in more efficient cooling and a longer lifespan for the IT components.

[0057] According to one embodiment, the dependent claim describes an arrangement in which at least one assembly is arranged within the IT rack, wherein this assembly is one of at least two plug-in devices inserted into at least one of the slots. This arrangement enables a flexible and modular structure within the IT rack by facilitating the integration of various assemblies in the form of plug-in devices. The assemblies can be, for example, cooling modules, computing units, or other IT components specifically designed for direct liquid cooling (DLC). The use of a bus system with a control unit that enables self-addressing for the connected plug-in devices optimizes communication and control within the IT rack.Self-addressing allows the plug-in devices to automatically identify and configure themselves within the network, simplifying installation and maintenance and reducing downtime. One advantage of this design is the increased flexibility and scalability of the IT infrastructure, as new modules can be easily added or replaced without extensive manual configuration. Another benefit is improved cooling efficiency, since direct liquid cooling enables effective heat dissipation, thus increasing the operational reliability and performance of the IT components. The modular design also contributes to reducing space requirements and cabling effort, which is particularly important in data centers where space and energy efficiency are critical factors.Integrating the modules as plug-in units also improves maintainability, as defective or outdated modules can be easily replaced without disrupting the operation of the entire IT rack. Overall, this arrangement offers a robust and future-proof solution for cooling and managing IT infrastructures, meeting increasing demands for performance and efficiency.

[0058] According to one embodiment, the arrangement comprises an assembly which is considered

[0059] An expansion vessel is used and fluidically connected to a coolant distribution channel of the direct liquid cooling system. The expansion vessel is preferably connected directly to the coolant distribution channel, meaning there are no additional fittings or intermediate components that could impede the flow of coolant. This allows for a more efficient and faster response to changes in coolant volume caused by temperature changes. The expansion vessel is particularly preferably located outside the IT rack. This external placement offers several advantages: First, valuable space inside the rack is kept free for other critical IT infrastructure components. Second, the external placement of the expansion vessel facilitates maintenance, as it is more easily accessible without having to remove or move other components within the rack.Thirdly, the external location contributes to safety, as the sensitive IT hardware in the rack is better protected in the event of a leak or other problem with the expansion vessel. The expansion vessel itself serves to compensate for volume fluctuations in the coolant circuit caused by thermal expansion or contraction of the coolant. This is particularly important in direct liquid cooling systems, as such systems often operate with large coolant volumes and significant temperature differences. Integrating an expansion vessel stabilizes the pressure in the coolant circuit, extending the lifespan of the entire cooling system and increasing operational reliability. Furthermore, the expansion vessel can act as a collection point for any air bubbles that may form in the coolant circuit, further improving cooling efficiency.The fluidic connection between the expansion vessel and the coolant distribution channel ensures that the coolant can circulate continuously and without interruption, which is crucial for maintaining a constant operating temperature of the IT infrastructure. Overall, this arrangement contributes to optimizing cooling performance and reducing downtime, which is of great importance in high-availability IT environments.

[0060] According to one embodiment, the direct liquid cooling (DLC) arrangement for an IT infrastructure comprises at least two identical or structurally equivalent direct liquid cooling assemblies, preferably several identical or structurally equivalent pump units (RPUs), of which at least two are particularly preferably configured as redundant pump units. This arrangement enables improved reliability and fault tolerance of the cooling infrastructure by ensuring that, in the event of a pump unit failure, one or more redundant pump units can automatically take over. The identical or structurally equivalent pump units are designed to be seamlessly integrated into the bus system, which features self-addressing for the plug-in devices of the direct liquid cooling system that can be connected to the bus.Self-addressing simplifies the installation and replacement of the pump units, as no manual configuration is required. This reduces installation and maintenance time and minimizes the risk of configuration errors. Using identical or identical pump units also simplifies inventory management, as only one type of spare part needs to be kept on hand. The redundant design of the pump units contributes to increased system availability, as cooling is ensured even if one pump unit fails. This is particularly important for IT infrastructures that require continuous cooling to maintain their operational capability. Furthermore, integrating the pump units into the bus system enables centralized monitoring and control of the cooling infrastructure, leading to more efficient management and a better overview of the operating status of individual components.The ability to use multiple identical or structurally identical pump units also offers scalable cooling capacity, as additional pump units can easily be added as cooling requirements increase. This makes the system flexible and adaptable to different requirements and load conditions. Overall, the described system provides a robust, efficient, and easy-to-manage solution for the direct liquid cooling of IT infrastructures, ensuring high reliability and ease of use thanks to its redundant and self-addressing components.

[0061] According to one embodiment of the invention, the arrangement comprises an IT rack with multiple slots for plug-in devices designed for direct liquid cooling (DLC). A specific feature of this embodiment is that at least one of the plug-in devices has a housing in which at least two redundant, preferably parallel-connected, pumps are arranged. These pumps are responsible for circulating the coolant and ensuring continuous cooling of the IT infrastructure. The redundancy of the pumps offers a significant advantage in terms of the reliability and fail-safety of the cooling system. Should one pump fail, the other pump can continue to circulate the coolant, thereby maximizing the uptime and stability of the IT infrastructure.Another important feature of this embodiment is that the housing is free of a compressor, an expansion medium, and a condenser, and preferably also contains no other active components of a refrigeration machine. This significantly reduces the complexity and maintenance requirements of the system, as there are fewer components that could potentially fail or require servicing. The absence of these additional active components also contributes to energy efficiency, since energy consumption remains limited to the pumps, and no additional energy sources are required for operating compressors or other refrigeration machine components. Furthermore, the parallel connection of the pumps allows for an even distribution of the workload, which extends the service life of the pumps and increases the efficiency of the cooling system.Overall, this design offers a robust and efficient solution for the direct liquid cooling of IT infrastructures, improving both operational reliability and ease of maintenance.

[0062] According to one embodiment, the arrangement for direct liquid cooling of an IT infrastructure comprises a housing in which at least one heat exchanger is integrated. This heat exchanger serves to efficiently dissipate heat generated by the IT components. The arrangement is designed such that coolant is circulated through an inner circuit of the heat exchanger, with redundant pumps ensuring continuous circulation of the coolant. These redundant pumps guarantee high reliability and fault tolerance of the cooling system, since if one pump fails, the other can continue to maintain the cooling circuit. A liquid-to-liquid heat exchanger is particularly advantageous because it enables heat transfer between two liquid circuits.The outer circuit of this heat exchanger can be connected to a recooler, which lowers the heated coolant temperature before it is fed back into the inner circuit of the heat exchanger. This configuration enables efficient and continuous cooling of IT components, improving the performance and lifespan of the IT infrastructure. One advantage of this arrangement is its improved thermal efficiency, as direct liquid cooling offers a higher heat transfer capacity than conventional air-based cooling systems. Furthermore, the integration of a liquid-to-liquid heat exchanger reduces the need for large and noisy fans, resulting in a quieter and more energy-efficient operating environment.The option to connect the outer circuit of the heat exchanger to a recooler offers flexibility in the choice of cooling methods and allows adaptation to different environmental conditions and cooling requirements. These features help to reduce overall operating costs and minimize environmental impact by reducing energy consumption and maximizing cooling efficiency. The described communication mechanisms and means of interaction between the components of the system ensure seamless integration and control of the cooling processes, simplifying the management and maintenance of the IT infrastructure.

[0063] In one embodiment, the arrangement includes a control unit as one of the plug-in units, which can contain the control device and is inserted into one of the plug-in units. This control unit is configured to control at least one other plug-in unit for direct liquid cooling, which is inserted into a different plug-in unit. This means that the control unit represents the central control unit within the IT rack and handles the coordination and control of the liquid cooling. The advantage of this arrangement lies in the improved modularity and flexibility of the IT infrastructure, since the control unit can be placed in any plug-in unit and takes over the control of the cooling processes. Integrating the control unit into the control unit reduces the complexity of the wiring and installation, resulting in simpler maintenance and faster component replacement.Furthermore, the arrangement enables efficient and targeted cooling, as the control unit can monitor and control the cooling requirements of each individual plug-in device. This results in optimized energy efficiency and improved thermal performance of the IT infrastructure. Another advantage is the solution's scalability, as additional control units and plug-in devices can be easily added without requiring extensive modifications to the existing infrastructure. The bus system's self-addressing capability also simplifies the integration of new plug-in devices, as they are automatically detected and integrated into the control system. This reduces manual configuration effort and minimizes the potential for errors during the installation of new components.Overall, the described arrangement offers a highly flexible, efficient and maintenance-friendly solution for the direct liquid cooling of IT infrastructures, which can be adapted to the specific requirements and conditions of the respective environment.

[0064] According to one embodiment, the dependent claim describes an arrangement in which a second plug-in device is connected to a control unit for signal transmission via a bus, preferably a wired data bus. The second plug-in device preferably does not have its own control unit. This configuration enables simplified and cost-effective integration of additional plug-in devices into the IT infrastructure, as these plug-in devices do not need to be equipped with their own control unit. Instead, control and monitoring are performed centrally via the control unit, which communicates with the plug-in devices via the bus. This reduces the complexity of the individual plug-in devices and lowers production costs, as fewer electronic components are required.Furthermore, the central control system enables uniform and coordinated regulation of the liquid cooling, increasing the efficiency and reliability of the cooling system. The wired data bus ensures a stable and reliable communication link between the control unit and the plug-in devices, guaranteeing fast and precise transmission of control and monitoring data. This is particularly advantageous in environments requiring high availability and performance of the IT infrastructure. The bus system's self-addressing capability also simplifies the installation and replacement of plug-in devices, as they are automatically detected and integrated into the system without requiring manual configuration. This saves time and minimizes the risk of installation errors.Overall, this arrangement contributes to a flexible, scalable and maintainable IT infrastructure that meets the requirements of modern data centers.

[0065] According to one embodiment, the arrangement for direct liquid cooling (DLC) of an IT infrastructure comprises at least one IT rack with multiple slots for direct liquid cooling units and / or an IT infrastructure. This arrangement includes a bus system with a control unit that has a bus with multiple data interfaces for connecting direct liquid cooling units. The bus system enables self-addressing for the direct liquid cooling units that can be connected to the bus.The at least one second plug-in unit of the direct liquid cooling system can be selected from various components, including a coolant distribution unit (CDU), a reservoir and pump unit (RPU), preferably with 2N redundant pumps, a heat exchanger, an expansion vessel, a pressure and / or temperature sensor, a three-way valve with bypass valve, an AC power supply, another control unit, a service valve, a filter, preferably a filter fan, an automatic air vent, and a pressure relief valve. These specific components and communication mechanisms enable improved interaction and control between the various parts of the cooling system. The coolant distribution unit (CDU) ensures efficient distribution of the coolant to the various parts of the IT infrastructure, while the reservoir and pump unit (RPU) with redundant pumps ensures a reliable and continuous coolant supply.The heat exchanger enables efficient heat transfer to regulate the temperature of IT components. The expansion vessel compensates for coolant volume changes caused by temperature fluctuations. Pressure and temperature sensors continuously monitor operating conditions to ensure optimal performance and safety. The three-way valve with bypass allows for flexible control of the coolant flow, while the AC power supply ensures a stable power supply. An additional control unit can be used for further monitoring and control. The service valve facilitates maintenance, and the filter, preferably a filter fan, ensures coolant purity. An automatic air vent removes air bubbles from the system, and the pressure relief valve protects the system from excessive pressure.These new features offer improved reliability, efficiency, and maintainability of direct liquid cooling for IT infrastructure.

[0066] According to one embodiment, the arrangement for direct liquid cooling of an IT infrastructure comprises a bus that can be connected to the control unit via a multi-pole blind connector. This blind connector is preferably divided into male and female parts, which are particularly preferably guided relative to each other by a self-centering mechanism. The multi-pole blind connector offers a reliable and efficient method for connecting the bus to the control unit, thereby significantly simplifying the installation and maintenance of the IT infrastructure. The self-centering of the male and female parts of the connector ensures a precise and secure connection, minimizing the risk of misconnections or damage to the contacts.This is particularly advantageous in environments requiring frequent connections and disconnections, as it simplifies handling and increases connection reliability. Furthermore, the multi-pole design of the blanking plug connector allows for the transmission of multiple signals and / or power supplies over a single connection, reducing cabling complexity and improving IT rack organization. These features contribute to increased efficiency and reliability of direct liquid cooling by enabling seamless integration of cooling components into the IT infrastructure. Another benefit of using a self-centering blanking plug connector is reduced installation time and staff training requirements, as the connection is intuitive and error-resistant.This results in overall higher operational efficiency and lower operating costs. The combination of these features ensures that the system is not only technically advanced but also practical and user-friendly, making it an attractive solution for modern IT infrastructures that rely on direct liquid cooling.

[0067] In one embodiment, the arrangement for direct liquid cooling of an IT infrastructure is designed such that the blanking plug connector is located on an exposed side of the control unit's housing, preferably on an end face of the housing that, when the control unit is inserted into one of the slots, faces the rear of the housing or the IT rack. This means that the blanking plug connector is strategically positioned to enable a simple and efficient connection when the control unit is inserted into the slot. A complementary blanking plug connector is located on the rear of the housing or the IT rack, corresponding to the blanking plug connector of the control unit. These two blanking plug connectors form a connection as soon as the control unit is fully inserted into the slot.This arrangement enables automatic and error-free connection of the control and communication lines without the need for manual intervention. The advantage of this configuration lies in the reduction of installation time and the minimization of connection errors, as the blind-type connectors ensure a secure and reliable connection. Furthermore, positioning the connectors at the rear of the enclosure or IT rack minimizes the space required at the front, resulting in better space utilization and accessibility of the IT infrastructure. The bus system's self-addressing capability allows connected plug-in devices to automatically identify and configure themselves, further simplifying the commissioning and maintenance of the IT infrastructure.This contributes to greater efficiency and reliability of the entire system, as it eliminates human error in addressing and configuring the devices. The combination of these features leads to improved overall performance and ease of use of the direct liquid cooling solution for IT infrastructures by enabling seamless integration and communication between the various components.

[0068] In one embodiment, the arrangement comprises a control unit with a drawer assembly consisting of a drawer body and a drawer. The drawer body is mounted in one of the provided slots, and the drawer can be inserted into the drawer body. At least one control unit is housed in the drawer. This arrangement enables flexible and modular integration of the control unit into the IT infrastructure. The drawer body serves as a housing or mounting bracket, which is accommodated in one of the provided slots of the IT rack. The drawer, which can be inserted into the drawer body, provides a simple way to accommodate the control unit and, if necessary, remove or replace it. This facilitates maintenance and upgrades, as the control unit is easily accessible.

[0069] One advantage of this arrangement is the improved accessibility of the control unit, which significantly simplifies maintenance and the replacement of control components. Another advantage is the increased flexibility in configuring the IT infrastructure, as the drawer containing the control unit can be placed in various slots within the IT rack. This enables an adaptable and scalable solution that meets the specific requirements of the IT environment.

[0070] The drawer arrangement also contributes to better organization and structuring of the IT infrastructure by ensuring neat and secure housing of the control unit. This can help extend the lifespan of the components and increase the reliability of the entire system. Furthermore, the drawer arrangement can help utilize space in the IT rack more efficiently, as the control unit is housed in a compact and easily accessible format.

[0071] Integrating the control unit into a drawer within a drawer unit also offers the advantage of improved cooling and ventilation of the control components. Placing the control unit in a drawer optimizes heat dissipation, which can lead to better performance and a longer component lifespan. Overall, this arrangement provides a flexible, accessible, and efficient solution for integrating and managing control units in an IT infrastructure with direct liquid cooling.

[0072] In one embodiment, the arrangement comprises a drawer body and a drawer, both equipped with complementary multipole blind connectors. These blind connectors enable a seamless and secure electrical connection between the IT infrastructure components, particularly between the drawer body and the drawer. The blind connector of the drawer body is connected to the bus, while the blind connector of the drawer is connected to the control unit. This arrangement ensures a reliable and stable connection as soon as the drawer is fully inserted into the slot. An advantage of this configuration is the increased operational reliability and the minimization of connection errors that could result from manual connections.The blind coupling connectors are designed to ensure automatic and precise contact alignment, significantly simplifying the installation and maintenance of IT infrastructure. Another advantage of this design is reduced downtime, as the drawers can be quickly and easily replaced or serviced. This is particularly important in environments requiring high availability and reliability of the IT infrastructure. Furthermore, the use of multi-pole connectors allows for the transmission of various signals and power supplies over a single connection, reducing cabling complexity and saving space. The blind coupling connectors are designed to ensure a reliable connection even under harsh conditions, such as dusty or humid environments.This contributes to the durability and robustness of the entire assembly. Overall, this design offers an efficient and user-friendly solution for the direct liquid cooling of IT infrastructure by enabling a simple and secure connection of the individual components while simultaneously increasing operational reliability and ease of maintenance.

[0073] According to one embodiment, the arrangement comprises a drawer assembly with at least one sensor on opposite end faces for determining a measured quantity relating to the environment of the drawer assembly. These sensors are preferably identical and serve to determine the same physical quantity. Integrating sensors on the end faces of the drawer assembly enables precise monitoring and control of the environmental conditions within the IT infrastructure. These sensors can, for example, measure temperature, humidity, or other relevant physical quantities that are important for the operation and cooling of the IT infrastructure. Placing the sensors on opposite end faces ensures comprehensive coverage and detection of the environmental conditions, which contributes to more accurate and efficient control of the direct liquid cooling.The identical sensors, used to measure the same physical quantity, enable redundant monitoring, which increases the system's reliability and security. Should one sensor fail or provide inaccurate readings, the other sensor can continue to deliver accurate data, ensuring continuity of monitoring and control. This arrangement helps optimize the operating conditions of the IT infrastructure by enabling constant and precise monitoring of environmental parameters. This is particularly important in environments where temperature and other physical quantities are critical to the performance and lifespan of IT components. Furthermore, integrating these sensors into the arrangement's bus system enables seamless communication and data transmission between the sensors and the control unit.This facilitates the implementation of automated control mechanisms based on the collected data and contributes to the efficiency and reliability of the entire IT infrastructure. Using identical sensors to determine the same physical measurement also simplifies sensor maintenance and replacement, as there is no need to stock different sensor types. Overall, this design offers improved monitoring and control of environmental conditions, resulting in optimized performance and a longer lifespan for the IT infrastructure.

[0074] According to one embodiment of the invention, the arrangement comprises sensors, preferably positioned on opposite end faces of the IT rack, to enable differential measurement. These sensors can perform either differential air pressure or differential air temperature measurements. The differential measurement between the opposite end faces of the IT rack provides precise monitoring of the environmental conditions within the rack and enables accurate control of the cooling. Positioning the sensors on the end faces ensures that the measurements are representative of the overall air circulation and temperature distribution within the rack. This is particularly advantageous because it allows for the early identification of potential hotspots or areas with insufficient cooling and the implementation of appropriate measures.Differential air pressure measurement can help monitor airflow through the rack and ensure uniform and efficient cooling. Conversely, differential air temperature measurement can help detect temperature differences within the rack and adjust the cooling accordingly to prevent overheating of IT components. Both types of differential measurement contribute to increased operational reliability and efficiency of the IT infrastructure. Integrating these sensors into the rack's bus system enables seamless communication with the control unit, which processes the acquired data and sends corresponding control commands to the cooling components. This results in automated and optimized control of cooling performance, which in turn reduces energy consumption and extends the lifespan of the IT components.The self-addressing of the plug-in devices in the bus system ensures that the sensors and other components can be integrated into the system without manual configuration, simplifying the installation and maintenance of the array. Overall, this design offers improved monitoring and control of cooling in IT racks, resulting in greater reliability and efficiency of the entire IT infrastructure.

[0075] According to one embodiment, the arrangement includes a control unit that provides power to at least one second direct liquid cooling unit or to another electrical consumer of the direct liquid cooling system. This specific configuration enables improved integration and management of the power supply within the IT infrastructure, particularly in an IT rack with multiple bays for plug-in units. The control unit not only acts as a central control unit for communication and control of the connected devices, but also as a central power source, thus eliminating the need for separate power supplies for each individual device. This results in a reduction of complexity and space requirements within the IT rack.Powering the system through the control unit ensures a consistent and reliable energy supply, which is particularly advantageous in environments with high demands on the uptime and reliability of IT systems. Integrating the power supply into the control unit also simplifies cabling, facilitating the installation and maintenance of the IT infrastructure. Furthermore, the control unit can monitor and control the power supply, resulting in more efficient energy use and improved operational reliability. The ability to centrally manage the power supply also minimizes downtime and ensures a rapid response to power supply issues.Another advantage of this arrangement is the flexibility it offers for expanding the IT infrastructure, as additional plug-in devices or electrical loads can be easily integrated into the existing system without requiring extensive modifications to the power supply. This is particularly useful in dynamic IT environments where frequent adjustments and expansions are necessary. Overall, providing an integrated power supply via the control unit contributes to optimized and more efficient management of the IT infrastructure, which reduces operating costs and improves the reliability and performance of the entire IT environment. According to one embodiment, the invention relates to an arrangement for the direct liquid cooling (DLC) of an IT infrastructure comprising a plurality of plug-in devices.This arrangement is characterized by the fact that the control unit has its own memory, or is communicatively connected to a memory independently of the control unit, which contains a configuration for controlling the numerous plug-in devices. These numerous plug-in devices are connected to the control unit via the bus for data transmission and do not have their own control units. Using a central control unit with associated memory containing the configuration data for controlling the plug-in devices offers several advantages. First, the complexity of the individual plug-in devices is reduced, as they do not require their own control unit. This leads to lower production costs and increased reliability of the individual plug-in devices, since fewer components can fail.Secondly, centralized storage of configuration data enables simpler and more efficient management and updating of control parameters. Configuration changes can be made centrally without having to adjust each individual unit separately. This saves time and reduces the effort required for maintenance and updates. Thirdly, centralized control improves the coordination and synchronization of cooling processes, as the control unit has a comprehensive overview of the status and requirements of all connected units. This leads to optimized cooling performance and more efficient use of cooling resources. Communication between the units and the control unit via the bus enables fast and reliable data transmission, which is crucial for real-time control of the cooling processes.Overall, the described arrangement offers improved efficiency, reliability and maintainability for the direct liquid cooling of IT infrastructures.

[0076] According to one embodiment of the invention, the arrangement comprises a configuration for controlling a plurality of plug-in devices, which is stored in an external memory and connected to the control unit for data transmission. This configuration enables efficient management and control of the plug-in devices by storing the control data not in the control unit itself, but in a separate memory. The external memory can store a plurality of configuration data required for the operation and control of the plug-in devices. This offers the advantage of relieving the control unit of its workload and making more computing power available for other tasks. Furthermore, the external memory can be easily updated or expanded without requiring any modifications to the control unit.The connection between the control unit and the external storage is established via a data transmission interface, ensuring fast and reliable communication. This interface can support various communication protocols to enable flexible and adaptable data transmission. A further advantage of this arrangement is increased scalability, as additional plug-in devices can be easily integrated by adjusting the configuration stored in the external storage. This facilitates the expansion of the IT infrastructure and adaptation to changing requirements. Offloading the configuration data to external storage also enhances security, as sensitive control data is not stored directly in the control unit and is therefore better protected against unauthorized access.The use of external storage also enables centralized management of configuration data, simplifying the maintenance and administration of the IT infrastructure. Overall, this arrangement offers a flexible, scalable, and secure solution for the direct liquid cooling of an IT infrastructure, enabling efficient and reliable control of the plug-in devices by relieving the control unit of its workload and allowing centralized management of configuration data.

[0077] In one embodiment, the arrangement for the direct liquid cooling of an IT infrastructure is designed such that the control unit is configured to retrieve its configuration from memory, at least for its initial setup. This means that the control unit automatically loads the necessary configuration data from a predefined memory area during initial startup or after a reset and configures itself accordingly. The memory can be non-volatile, ensuring that the configuration data is retained even after a power outage or a restart. This approach offers several advantages. Firstly, it significantly simplifies the installation and commissioning process, as no manual configuration of the control unit is required. This saves time and reduces the likelihood of configuration errors.Secondly, the system's reliability is increased because the configuration data is always retrieved consistently and correctly from memory. This is particularly important in IT infrastructures, where flawless and efficient cooling is crucial for the operational stability of the entire system. Furthermore, this automation enables rapid system recovery after maintenance or unexpected failures, as the control unit is immediately operational again once power is restored. Another advantage lies in the flexibility of system expansion. New plug-in devices can be easily added, and the control unit automatically retrieves their configuration from memory without requiring any manual adjustments. This facilitates the scalability of the IT infrastructure and allows for dynamic adaptation to changing requirements.The bus system's self-addressing, combined with automatic configuration transfer from memory, ensures seamless integration of new devices into the existing system. This reduces downtime and increases the efficiency of maintenance processes. Overall, this implementation helps lower operating costs and maximize IT infrastructure availability by providing a robust, flexible, and user-friendly direct liquid cooling solution.

[0078] According to one embodiment, the arrangement for direct liquid cooling of an IT infrastructure, comprising at least one IT rack with multiple slots for plug-in devices, features specific communication mechanisms that optimize the interaction between the components. The second set of plug-in devices is equipped with a unique device identifier. This unique device identifier allows the plug-in devices to be configured via an assigned device configuration. This means that each plug-in device can not only be individually identified but also assigned specific configuration data based on this identification. The advantage of this arrangement lies in the improved management and control of the plug-in devices within the IT rack.The unique device identifier ensures that each device can be correctly addressed and configured, increasing the efficiency and reliability of the entire IT infrastructure. Configuration via the unique device identifier enables automatic adjustment and optimization of the operating parameters of the rack-mount devices, resulting in improved performance and a reduction in errors. Furthermore, this arrangement simplifies the maintenance and replacement of rack-mount devices, as the unique device identifier allows for quick and precise identification. This is particularly advantageous in large data centers where numerous rack-mount devices are in operation and manual configuration can be time-consuming and error-prone.Assigning device configurations via unique device identifiers ensures that the plug-in devices are always optimally configured, improving cooling efficiency and thus the overall performance of the IT infrastructure. Furthermore, this arrangement increases the scalability of the IT infrastructure, as new plug-in devices can be easily integrated into the existing system without requiring extensive manual configuration. The self-addressing of the bus system, combined with the unique device identifiers of the plug-in devices, leads to automated and intelligent management of the IT infrastructure, reducing operating costs and increasing reliability.

[0079] According to one embodiment of the invention, the arrangement for direct liquid cooling of an IT infrastructure comprises at least one IT rack with multiple slots for plug-in units of direct liquid cooling and / or IT infrastructure. The arrangement includes a bus system with a control unit that has a bus with multiple data interfaces for connecting plug-in units of direct liquid cooling. The bus system is designed to enable self-addressing for plug-in units of direct liquid cooling that can be connected to the bus. In this specific embodiment, at least one second plug-in unit or another electrical assembly, such as a fan, of the direct liquid cooling system is connected to the control unit via the bus for signal transmission.This second component or assembly is configured to assume a default operating state in the event of an interruption in signal transmission over the bus and / or a failure of the control unit. This default operating state ensures that the IT infrastructure can continue to operate safely and stably, even if communication with the control unit is interrupted. This offers the advantage of increasing the reliability and availability of the IT infrastructure by minimizing potential downtime. The ability of the components to switch to a default operating state helps ensure that critical systems can continue to be cooled and operated, which is particularly important in data centers and other IT environments. A further advantage of this arrangement is the flexibility and scalability achieved through the self-addressing bus system.This enables the simple and efficient integration of new plug-in devices or assemblies without complex manual configuration processes. Self-addressing simplifies the management and monitoring of connected devices, as each device automatically receives a unique address and can thus be seamlessly integrated into the existing system. This leads to a reduction in administrative overhead and an increase in operational efficiency. The use of a bus for signal transmission between the components and the control unit enables centralized control and monitoring, which simplifies maintenance and fault diagnosis. Overall, this arrangement offers a robust and flexible solution for direct liquid cooling in IT infrastructures, improving both operational reliability and efficiency. Further details of the invention are explained with reference to the figures below. These show:

[0080] Figure 1 shows a schematic representation of direct liquid cooling;

[0081] Figure 2 shows an exemplary embodiment of a plug-in device designed as a pump unit;

[0082] Figure 3 shows an exemplary embodiment of direct liquid cooling with additional rear door air cooling;

[0083] Figure 4 shows a schematic representation of an exemplary embodiment of a slide-in device;

[0084] Figure 5 shows another embodiment of a slide-in device;

[0085] Figure 6 shows another embodiment of a slide-in device;

[0086] Figure 7 shows a schematic representation of an exemplary embodiment of a plug-in device designed as a control unit, comprising a drawer arrangement with a drawer body and a drawer;

[0087] Figure 8 shows an embodiment of an arrangement according to the invention in front view (a) and side view (cb); and

[0088] Figure 9 shows another embodiment of an arrangement according to the invention in a side view of the IT rack.

[0089] Figure 1 shows a schematic representation of a direct liquid cooling (DLC) system. Cooled liquid is supplied by a recooler 16, which can be configured, for example, as a chiller, with or without a refrigeration unit. The recooler 16 includes, in particular, an air-liquid heat exchanger and at least one fan that circulates ambient air through the air-liquid heat exchanger. The cooled liquid supplied by the recooler is fed to a coolant distribution unit (CDU), specifically via the supply line of an outer circuit of the CDU. The liquid supplied by the recooler leaves the CDU as a heated liquid via a return line of the outer circuit, and the outer circuit of the CDU, which simultaneously forms the liquid circuit of the recooler 16, is designated by reference numeral 17.

[0090] The coolant distribution unit CDU comprises, in particular, a liquid-liquid heat exchanger and at least one pump for transporting liquid through the inner circuit 15 of the CDU. The supply line of the inner circuit of the CDU is connected to a return line of a coolant distribution channel, and the return line of the inner circuit 15 of the CDU is connected to a supply line of the coolant distribution channel 7. The coolant distribution channel 7 can have several connections spaced apart along its length, i.e., vertically, to a supply line of the coolant distribution channel 7, through which cooled coolant is supplied, and to a return line of the coolant distribution channel 7, through which heated coolant is discharged.

[0091] The plug-in units 2 can, for example, be server modules of an IT infrastructure, which are connected to the distribution channel 7 in the manner known from US 2007 / 0274043 Ai. In the plug-in units, the cooling fluid, which is preferably an electrically non-conductive refrigerant, flows over the components requiring cooling, for example CPUs or GPUs, or any other component which has a high power dissipation and, moreover, a high temperature sensitivity, so that air cooling is unsuitable due to the lower thermal conductivity of air compared to liquid.

[0092] The schematic diagram shows the fluid circuit of the direct liquid cooling (DLC) system in an IT rack. The cooled fluid is transported from the recooler 16 via the outer circuit 17 to the coolant distribution unit (CDU). Within the CDU, the fluid is passed through a liquid-to-liquid heat exchanger and at least one pump. The inner circuit 15 of the CDU carries the cooled fluid to the coolant distribution channel 7, which is arranged vertically in the IT rack. The coolant distribution channel 7 distributes the cooled fluid to the various plug-in devices 2, which are arranged in the slots of the IT rack.

[0093] The insert units 2 are designed so that the coolant flows over the components requiring cooling, such as CPUs or GPUs, and absorbs the resulting heat. The heated coolant is then returned to the CDU via the return line of the coolant distribution channel 7, where it is cooled again. The return line of the inner circuit 15 of the CDU carries the heated fluid back to the recooler 16, where the cycle begins anew.

[0094] This arrangement enables efficient cooling of the IT infrastructure by dissipating heat directly from the components, thus eliminating the need for less efficient air cooling. The use of a non-conductive refrigerant ensures that the electrical components are not damaged, while the liquid's high thermal conductivity guarantees effective cooling.

[0095] Figure 2 shows an exemplary embodiment of a plug-in device which can be used in an arrangement according to the invention. The plug-in device 2.1 has a housing 13 which can be standardized, for example, with regard to its dimensions, for example at least in such a way that when the plug-in device 2.1 is inserted into a slot of an IT rack, contact can be made automatically, i.e., in particular without tools, to both the first and the second blind coupling connectors 6.1, 6.2 for the electrical contact of the power distribution on the one hand and the fluidic connection to the direct liquid cooling, in particular a coolant distribution channel, on the other.

[0096] The housing 13 contains three redundant pumps 14, which are connected in parallel. This parallel connection of the pumps 14 ensures a high level of reliability of the pump unit. Furthermore, a heat exchanger 12, in particular a liquid-to-liquid heat exchanger, is arranged in the housing 13. The only active components within the housing 13 are therefore the pumps 14, which are provided in triplicate and connected in parallel.

[0097] The pump unit shown in Figure 2 thus exhibits very high resilience to failure. Due to the use of the first and second blind coupling connectors 6.1, 6.2, the entire unit, i.e., the plug-in device 2.1, can be replaced quickly and without significant downtime in the event of failure of all pumps or reduced pump performance. Further redundancy of the direct liquid cooling (DLC) system can be achieved by providing several of the plug-in devices 2.1 shown in Figure 2, which are connected in parallel. This ensures that even if all three pumps 14 fail, one of the multiple plug-in devices 2.1 will continue to operate the DLC system, and downtime can be essentially avoided. The blind coupling connectors 6.1, 6.2 enable tool-free connection for both electrical and fluidic connections.This significantly simplifies the replacement and maintenance of the plug-in units. The redundant pumps 14 and the heat exchanger 12 are arranged to ensure efficient cooling of the IT infrastructure.

[0098] Figure 3 shows an embodiment in which the arrangement according to the invention is housed in a control cabinet enclosure designed as an IT cabinet with several 19-inch rack units arranged vertically one above the other. The rack units 2.1 in the rack units 2 of the IT rack 1 are partially occupied by servers and partially by direct liquid cooling units 2.1. For example, an uppermost rack unit 2 of the IT rack 1 is occupied by a DC power supply 3, which is provided as a direct liquid cooling unit 2.1. A lower rack unit 2 is occupied by a coolant distribution unit (CDU).

[0099] A coolant distribution channel 7 with its supply and return lines is located on the rear side of IT rack 1. The supply and return lines of the coolant distribution channel 7 are connected to the coolant distribution unit CDU. A rear door heat exchanger 200 is connected to the rear side of IT rack 1. This heat exchanger has an air-liquid heat exchanger and several fans. Cooled air is drawn through the front of IT rack 1, past the server bays 2.1 requiring cooling, and into the rear door heat exchanger 200. There, the heated air passes through the air-liquid heat exchanger and is expelled as cooled air into the surrounding area of ​​the enclosure.

[0100] The supply line of the air-liquid heat exchanger of the rear-door cooling unit 200 is fed by a recooler 16, for example, a chiller. The return line of the air-liquid heat exchanger of the rear-door cooling unit 200 is connected to a supply line of an outer circuit of the CDU (cooling unit). The heated liquid discharged by the air-liquid heat exchanger thus serves as a heat sink with respect to the CDU. A liquid-liquid heat exchanger 12 is arranged in the CDU, through which heat is transferred from an inner circuit of the CDU, to which the CDU is connected to the coolant distribution channel 7, to the outer circuit of the CDU. All insert devices 2.1, except for the DC power supply 3 itself, can be designed as DC devices, which are operated, for example, at an operating voltage of 48 V.The entire power distribution within the IT rack can thus take place at a less hazardous DC voltage level compared to mains voltage, thereby increasing the operational reliability of the IT rack. Furthermore, the modular design of the direct liquid cooling system allows, for example, the expansion vessel 10 to be positioned advantageously on the top of the IT rack 1, specifically above the coolant distribution channel 7.

[0101] The coolant distribution unit CDU comprises several pumps 14, which are redundantly configured to ensure continuous coolant circulation. The pumps 14 are connected in parallel to maintain the function of the other pumps in the event of a pump failure. The liquid-liquid heat exchanger 12 in the CDU enables the efficient transfer of heat from the inner circuit to the outer circuit, with the inner circuit connected to the coolant distribution channel 7 and the outer circuit dissipating the heat to the recooler 16.

[0102] The rear door heat exchanger 200 is designed to capture the warm air flowing through the server bays 2.1 and direct it through the air-to-liquid heat exchanger. The rear door heat exchanger 200's fans ensure sufficient air circulation to efficiently cool the heated air and expel the cooled air back into the environment. This helps maintain optimal operating temperatures for the servers and other IT components.

[0103] In summary, Figure 3 shows a detailed arrangement of an IT rack 1 with integrated direct liquid cooling DLC, where the various components such as the DC power supply 3, the coolant distribution unit CDU, the coolant distribution channel 7 and the rear door heat exchanger 200 work together in a modular and efficient system to ensure reliable and safe cooling of the IT infrastructure.

[0104] Figures 4 and 5 show different configurations of a plug-in device 2.1, which is designed as a pump unit RPU in the embodiment shown in Figure 4. The RPU shown in Figure 4 has only two pumps 14 connected in parallel, which are housed in a casing 13 with two power supplies 19, one for each pump 14. A first blanking plug connector 6.1 serves for connection to the DC voltage source, and a pair of second blanking plug connectors 6.2 serve for connection to the inner circuit of the DLC, so that the coolant distribution channel (not shown) of the DLC can be supplied with cooled coolant using the pump unit RPU shown in Figure 4.

[0105] Extending the embodiment shown in Figure 4, the embodiment shown in Figure 5 not only provides a liquid-liquid heat exchanger 12, but also features triple redundancy in the pumps 14. Accordingly, three power supplies 19 are provided for the independent supply of the three pumps 14. The embodiment shown in Figure 5 is suitable, for example, for use in a control cabinet according to Figure 3, in which the outer circuit of the CDU is connected to an air-liquid heat exchanger, such as a heat exchanger of a rear-door cooling unit 200.

[0106] In addition, the embodiment shown in Figure 5 includes a third blind coupling connector 6.3, which serves to connect the outer circuit of the liquid-liquid heat exchanger 12 to a recooler. This enables efficient heat dissipation from the system by cooling the coolant circulating in the inner circuit through the liquid-liquid heat exchanger 12 before it is returned to the coolant distribution channel of the DLC.

[0107] The embodiments shown in Figures 4 and 5 illustrate the flexibility and scalability of the pump unit RPU within an IT rack, with the redundancy and additional cooling capacity provided by the use of a liquid-liquid heat exchanger 12 in the embodiment according to Figure 5 ensuring higher operational reliability and efficiency.

[0108] Figure 6 shows an alternative embodiment of direct liquid cooling (DLC) for an IT infrastructure, which differs from the embodiment shown in Figure 5. In this embodiment, an air-to-liquid heat exchanger 12 is provided instead of a liquid-to-liquid heat exchanger. The air-to-liquid heat exchanger 12 is arranged in a housing 13 and is supported by a pair of fans 20, which provide the necessary air circulation to optimize heat transfer. Additionally, an expansion vessel 10 is integrated into the housing 13, which serves to compensate for volume fluctuations of the coolant and thus stabilize the pressure in the cooling circuit.

[0109] A pair of redundant pumps 14 are also housed in the enclosure 13. These pumps are responsible for fluid transport within the cooling circuit and, through their redundancy, ensure high operational reliability. Each of the pumps 14 is powered by its own independent power supply 19 to ensure a continuous power supply and provide fail-safe operation.

[0110] The power supplies 19 are designated PSU 1 and PSU 2 and are located in the upper left corner of the chassis 13. These power supplies are independent of each other to maximize redundancy and increase system reliability.

[0111] The illustration also shows several sensors, including temperature sensors T and pressure sensors P, which are used to monitor the system's operating conditions. A filter F is also integrated to remove impurities from the coolant and extend the service life of the components.

[0112] The configuration shown illustrates how the various components of the direct liquid cooling (DLC) system are integrated into a compact housing 13 to ensure efficient and reliable cooling of the IT infrastructure. The use of air-to-liquid heat exchangers, redundant pumps, and independent power supplies ensures that the system remains operational even if individual components fail.

[0113] Figure 7 schematically shows a top view of a control unit 2.1, a plug-in device. The control unit comprises a drawer assembly with a drawer body 21, which can be accommodated in one of the slots 2, and a drawer 22, which can be inserted into the drawer body 21. In Figure 7, the drawer 22 is in a fully inserted position. The drawer 22 is divided into two sections 22.1 and 22.2, both of which have a rectangular shape. The second section 22.2 is smaller than the first section 22.1, so that a rear section 21.1 of the drawer body 21 is not occupied by the drawer 22. In this section 21.1, the DC power supply 3, a DC power connection 3.1, and a first blanking plug connector 6.1 for connecting the drawer body 21 to a busbar are arranged.

[0114] The arrangement of area 21.1 allows the components located in area 21.1 to remain fully functional and in electronic contact and / or signal connection with other plug-in devices 2.1 or other components of the housing, even when the drawer 22 is moved into a position that is at least partially extended. The DC power supply 3 can thus, regardless of the position of the drawer 22, supply the power rail 5 and therefore other plug-in devices 2.1 with DC current via the first blanking plug connector 6.1 and supply power via the DC connection 3.1 to various systems or components that are not connected to the power rail 5. These systems and components can, for example, include the rear door cooling unit 200, a fan or heat exchanger unit located next to the housing or IT rack 1, or even components not located in a plug-in device 2.1. Arranged electrical consumers, such as pumps of a CDU or RPU.

[0115] The drawer 22 comprises a control unit 9 and three CMC modules 29 for connecting sensors, redundant power supplies, or DC-DC converters 24. The CMC modules 29 are analog components for connecting various sensor types (pressure, temperature, pH value, conductivity, leakage, etc.). This allows measured values ​​from sensors located outside the control unit to be acquired, transmitted to the control unit 9, and used for control purposes. The drawer 22 can be connected to a data bus of the arrangement via a third blanking plug connector 6.3, which has a male and a female part guided relative to each other by a self-centering mechanism 31. The blanking plug connector 6.3 of the drawer body 21 is connected to the data bus, and the blanking plug connector 6.3 of the drawer 22 is connected to the control unit 9.3 is arranged such that the complementary blind coupling connectors 6.3 form a plug connection when the drawer 22 is fully inserted into the drawer body 21, thereby achieving a tool-free connection of the drawer 22 to the data bus.

[0116] Drawer 22 also incorporates sensors, which has the advantage that sensor components can be easily replaced or maintained, and the cable run to the control unit can be kept short. A temperature and humidity sensor 23 is located on the front of drawer 22, and an air differential pressure sensor 26 is located on one side of drawer 22. The air differential pressure sensor 26 has an air hose 27 that runs along the rear of drawer 22 and is connected there via hollow centering pins 28 to measure the air pressure at the rear of the IT rack 1. Based on the air differential pressure and / or a detected temperature or humidity, the control unit 9 can control at least one second plug-in device 2.1.

[0117] The drawer assembly can have at least one sensor on opposite end faces for determining a measured quantity relating to the environment of the drawer assembly, preferably an identical sensor for determining the same physical quantity. Thus, a differential measurement can be provided using the sensors arranged on the opposite end faces, preferably a differential air pressure measurement or a differential air temperature measurement. This is particularly advantageous when the IT rack is installed between a cold and a hot aisle, as a differential measurement between the cold and hot aisles can then be performed, and the DLC can be controlled to provide the desired conditions.

[0118] The components housed in drawer 22 are both interconnected and connected to the blanking plug connector 6.3. This includes electrical contact and signal transmission. Connection 30 can therefore represent both an electrical conductor and a signal line. For example, the CMC modules 29 communicate with the control unit 9 via CAN bus, but are simultaneously electrically connected to the blanking plug connector 6.3 for power supply. Furthermore, the drawer can have communication interfaces 25, such as USB, USB-C, or Bluetooth, to enable external access to the control unit 9 and / or to provide information to external devices.

[0119] The insert unit 2.1, designed as a drawer arrangement in Figure 7, can be hot-swappable, particularly with regard to its electrical connection to a power supply and / or a data bus. This allows the IT rack 1 to continue operating even after the drawer 22 is removed or replaced. In the drawer arrangement, the hot-swap capability is primarily implemented by the blind coupling connectors 6.1 and 6.3, ensuring that no short circuit or other electrical disturbance occurs in the IT rack 1 when these connectors are connected or disconnected. Furthermore, the control unit can have a memory or be communicatively connected to a memory unit independent of the control unit, which contains a configuration for controlling a plurality of second insert units 2.1.1 is connected to the control unit for data transmission via a data bus and has no control of its own. Due to the configuration stored in the memory, the multiple second plug-in devices 2.1 can continue to operate even if the control unit 9 is defective or out of service. The memory can, for example, be located in area 21.2 so that it is operational regardless of the position of the drawer 22. Alternatively or additionally, an external memory can also be contacted via the communication interface 25.

[0120] Similarly, the control unit can be configured to adopt the configuration from memory, at least for its initial configuration, so that control unit 9 can be configured based on the initial configuration. This allows the control unit to be operational almost immediately after a replacement of control unit 9. Alternatively or additionally, the second plug-in units 2.1 can have a unique device identifier, whereby the configuration for at least some of the second plug-in units 2.1 has a device configuration assigned via the unique device identifier.

[0121] Finally, it may also be provided that at least one second plug-in device 2.1 or another electrical assembly, such as a fan, of the direct liquid cooling (DLC) is connected to the control unit 9 via a data bus for signal transmission, wherein the second plug-in device 2.1 or the other electrical assembly is configured to assume a default operating state in the event of an interruption of the signal transmission via the data bus and / or a failure of the control unit. For example, it may be provided that a microchip containing a standard configuration for components contained in the plug-in device 2.1 is arranged in a plug-in device 2.1 of the DLC, so that uninterrupted operation of the IT rack 1 is possible.

[0122] Figure 8 shows, in front view a and side view b, an exemplary embodiment of an arrangement for supplying electrical energy to a direct liquid cooling system. The arrangement comprises an IT rack 1 with a plurality of vertically stacked slots 2 for plug-in units 2.1 of a direct liquid cooling system. In addition to the plug-in units 2.1 for the direct liquid cooling system, further plug-in units 2.1 are provided, which in this case are configured as servers. The rectifier PSU is also configured as a plug-in unit 2.1. A busbar of a DC power supply 3 for the slots 2 and the plug-in units 2.1 housed therein extends along the rear side R of the IT rack 1 as the power distribution 5. The busbar is supplied by the rectifier PSU, in particular with a DC voltage. The plug-in units 2.The components of the direct liquid cooling system (DLC), insofar as they require an electrical power supply, are each housed in one of the modules 2 and electrically connected to the busbar. The expansion vessel 10, which does not require an electrical power supply, is located in a physically advantageous position on the top side, i.e., otherwise outside the IT rack 1. A control unit 9 is designed as a separate module, independent of other DLC modules, and is directly connected to the DC power supply 3, in particular to the busbar of the power distribution unit 5. The modules 2.1 have first blind connectors 6.1 for tool-free connection of the modules 2.1 to the busbar. Complementary blind connectors can be arranged on the rear side of the module 2.1 housings facing the busbar.Similarly, for connection to a supply and a return line of the coolant distribution channel 7, second blind coupling connectors, which are fluid-carrying, can be arranged on the rear side.

[0123] The bus system 40 is a central component of the arrangement and comprises the control unit 9, the bus 41, and a plurality of data interfaces 42. The control unit 9 is configured to communicate via the bus 41 with the data interfaces 42, which extend along the vertical direction z of the IT rack 1. These data interfaces 42 enable the connection and communication with the plug-in units 2.1 of the direct liquid cooling (DLC). The bus system 40 is equipped with a self-addressing function that allows the connected plug-in units 2.1 to automatically address and identify themselves. For this purpose, the bus system 40 reads at least one unique identifier from a plug-in unit 2.1 connected to the bus 41 or from at least one module of the plug-in unit 2.1. Based on this read identifier, the control unit 9 can store a value in a memory 9.1. Determine the addressing of the corresponding plug-in device 2.1, which is stored and marked with the read-out identifier.

[0124] The plug-in units 2.1, the control unit 9, and the plug-in unit housings 13 are designed to be hot-swappable. This means they can be replaced during operation without interrupting the power supply or coolant supply. For this purpose, the plug-in units 2.1 are equipped with data interfaces 42 on their rear side, enabling a simple and secure connection to the bus 41. This hot-swap capability significantly increases the flexibility and ease of maintenance of the system.

[0125] While the embodiment shown in Figure 8 includes both server components requiring cooling and various direct liquid cooling (DLC) assemblies for cooling the servers, the embodiment shown in Figure 9 equips the IT rack 1 exclusively with components of a direct liquid cooling (DLC) system. In particular, several of the plug-in units 2.1 are designed as redundant pump units (RPUs). These can, for example, be configured as one of the embodiments shown in Figures 2 and 4. The two plug-in units 2.1 comprise the heat exchanger 12 and the expansion vessel 10. The DC power supply 3 is also designed as a plug-in unit, as is the control unit 9. The DC power supply 3 is the only component of the arrangement shown in Figure 9 that is supplied with mains voltage.Furthermore, the arrangement ensures that all components and devices for power distribution, in particular the busbar 5, operate at a low DC voltage, for example 48 V.

[0126] The arrangement shown in Figure 9 depicts an IT rack 1 containing several plug-in devices 2.1 in the form of RPU modules. These RPU modules are arranged one above the other along the vertical axis z of the IT rack 1 and inserted into the slots 2 via the linear guide 8. Each RPU module is connected to the busbar 5 and the coolant distribution channel 7 by means of a first blind connector 6.1. The blind connectors 6.1 and 6.2 enable tool-free connection of the RPU modules to the power supply and the coolant circuit.

[0127] The control unit 9, also designed as a plug-in unit 2.1, is located in the upper section of IT rack 1 and is connected to the other components via bus 41. Control unit 9 monitors and controls the operating parameters of the RPU modules and other connected assemblies. Bus 41 enables data communication between control unit 9 and the RPU modules, as well as other components of the direct liquid cooling (DLC) system. The expansion vessel 10 and the heat exchanger 12 are housed in separate plug-in units 11 located in the lower section of IT rack 1. The expansion vessel 10 accommodates volume fluctuations of the coolant, while the heat exchanger 12 facilitates heat transfer between the coolant and an external recooler. Both components are connected to the coolant distribution channel 7 via corresponding blanking plug connectors 6.1 and 6.2.

[0128] The DC power supply 3, located in the upper section of IT rack 1, converts the incoming mains voltage into a low DC voltage required for the operation of the RPU modules and other components. This DC power supply 3 is the only component that is directly powered by mains voltage. All other components and devices are designed for a low DC voltage, for example, 48 V, to ensure the safety and efficiency of the power distribution.

[0129] In summary, the embodiment shown in Figure 9 depicts an IT rack 1 equipped exclusively with components of a direct liquid cooling (DLC) system. The redundant pump units (RPU), the control unit 9, the expansion vessel 10, the heat exchanger 12, and the DC power supply 3 are integrated into the IT rack 1 as plug-in units 2.1 and interconnected via a bus system 40. This arrangement ensures efficient and reliable cooling of the IT infrastructure through direct liquid cooling (DLC).

[0130] The features given in the aforementioned description can be relevant in any combination for the realization of embodiments of the invention, the scope of protection being determined solely by the claims.

[0131] REFERENCE MARK LIST

[0132] IT rack

[0133] Insert

[0134] Insert device

[0135] DC power supply

[0136] DC connection

[0137] busbar first blind coupling connector second blind coupling connector third blind coupling connector

[0138] Coolant distribution channel

[0139] Linear guide

[0140] control unit

[0141] memory

[0142] Expansion vessel, additional insert device

[0143] Heat exchanger

[0144] Housing

[0145] pump

[0146] inner circle

[0147] Recooler

[0148] outer circle

[0149] power supply

[0150] fan

[0151] drawer unit

[0152] Rear section of the drawer unit 22 drawers

[0153] 22.1 First section of the drawer

[0154] 22.2 Second section of the drawer

[0155] 23 Temperature and humidity sensor

[0156] 24 power supplies, DC-DC converters

[0157] 25 communication interfaces

[0158] 26 Air differential pressure sensor

[0159] 27 air hose

[0160] 28 Hollow centering pins

[0161] 29 CMC modules

[0162] 30 Electrical conductor, signal line

[0163] 31 Self-centering

[0164] 40 bus system

[0165] 41 Bus

[0166] 42 Data interface

[0167] 200 rear door refrigerator

[0168] BBU interruption of free power supply

[0169] CDU coolant distribution unit

[0170] DLC direct liquid cooling

[0171] PSU rectifier

[0172] RPU pump unit

[0173] R Back x Insertion direction z Height direction

Claims

Claims:

1. Arrangement for the direct liquid cooling (DLC) of an IT infrastructure, wherein the arrangement comprises at least one IT rack (1) with a plurality of slots (2) for plug-in devices (2.1) of a direct liquid cooling (DLC) system and / or an IT infrastructure, wherein the arrangement comprises a bus system (40) with a control unit (9) which has a bus (41) with a plurality of data interfaces (42) for connecting plug-in devices (2.1) of a direct liquid cooling (DLC) system, characterized in that the bus system (40) has self-addressing for plug-in devices (2.1) of a direct liquid cooling (DLC) system that can be connected to the bus (41).

2. Arrangement according to claim 1, wherein the slots (2) are arranged one above the other in the vertical direction (z) of the IT rack (1), wherein the bus (41), preferably a CAN bus, has a bus line extending along the vertical direction (z) with a plurality of connectors as a data interface (42).

3. Arrangement according to claim 1 or 2, wherein the bus system (40) is configured to read out at least one unique identifier of a plug-in device (2.1) connected to the bus (41) or at least one assembly of the plug-in device (2.1) for self-addressing.

4. Arrangement according to claim 3, wherein the bus system (41) is configured to determine, on the basis of the read-out identifier, an addressing of the plug-in device (2.1) having the unique identifier or of the at least one assembly of the plug-in device (2.1) stored in a memory (9.1) of the control unit (9) and marked with the read-out identifier.

5. Arrangement according to one of the preceding claims, comprising at least one plug-in device (2.1) of a direct liquid cooling (DLC) system with at least one assembly addressed via the bus system (40), wherein the assembly comprises at least one and preferably several components that can be addressed independently of one another via the bus system (40). 70 82.82 6. Arrangement according to claim 5, wherein the assembly comprises several components that can be addressed independently of one another via the bus system (40), which are preferably designed as identical parts and / or redundant to each other.

7. Arrangement according to claim 5 or 6, wherein the assembly is a pump unit of a coolant distribution unit (CDU) or a reservoir and pumping unit (RPU) with at least one and preferably several pumps (14) designed as identical parts and / or redundant to each other for liquid transport.

8. Arrangement according to one of the preceding claims, wherein the bus system (40) is configured to read operating data of at least one plug-in device (2.1) of a direct liquid cooling (DLC) system, or at least one assembly of the direct liquid cooling (DLC) system, or at least one component of the assembly, wherein the control unit (9) is configured to determine, on the basis of the operating data, a maintenance status, a remaining service life, or a wear status of the at least one plug-in device (2.1), the at least one assembly, or the at least one component.

9. Arrangement according to one of the preceding claims, wherein the IT rack (1) contains devices, in particular plug-in devices (2.1), of direct liquid cooling (DLC), wherein the IT rack is free of devices of an IT infrastructure.

10. Arrangement according to claim 9, wherein the direct liquid cooling (DLC) devices are devices including insert devices (2.1) of a coolant distribution unit (CDU) or a reservoir and pump unit (RPU).

11. Arrangement according to claim 9 or 10, wherein the device has a housing (13) in which at least one pump (14), preferably a plurality of redundant pumps (14), particularly preferably a plurality of parallel connected pumps (14), is accommodated.

12. Arrangement according to claim 11, wherein several, preferably a plurality, of devices having a housing (13), preferably in identical design, are accommodated in the IT rack (1). 13- Arrangement according to one of claims 9 to 12, wherein the direct liquid cooling (DLC) devices, in particular the plug-in devices (2.1), are designed to be hot-swappable, preferably with respect to a connection to a coolant circuit (15) of the direct liquid cooling (DLC) and / or a connection to a power supply, in particular to a DC power distribution (5) of the IT rack (1), preferably a DC busbar of the power distribution (5).

14. Arrangement according to any one of claims 9 to 12, wherein at least one of the devices is an uninterruptible power supply (UPS) and / or a battery backup unit (BBU) which is configured to supply the direct liquid cooling (DLC) devices with a DC voltage in the event of a power supply failure, in particular in the event of a power supply unit failure.

15. Arrangement of claim 14, wherein the uninterruptible power supply (UPS) and / or the battery backup unit (BBU) is designed to be hot-swappable, preferably with respect to a connection to a power connection and / or to a power distribution (5) of the IT rack (1), preferably a DC busbar of the power distribution (5).

16. Arrangement according to claim 14 or 15, wherein several of the devices are an uninterruptible power supply (UPS) and / or a battery backup unit (BBU), wherein the several devices are redundant to each other and independently interchangeable.

17. Arrangement according to one of claims 9 to 16, wherein the control unit (9) is one of the plug-in devices (2.1) of the direct liquid cooling (DLC), wherein the control unit (9) is designed to be hot-swappable, preferably with respect to a connection to the bus (41) and / or a connection to a power supply, in particular to a DC power distribution (5) of the IT rack (1), preferably a DC bus of the power distribution (5).

18. Arrangement according to any one of claims 5 to 14, comprising several plug-in devices (2.1), at least one of which is a power supply unit (PSU), wherein the power supply unit (PSU) is hot-swappable, preferably with respect to a connection to a Power connection and / or to a DC power distribution (5) of the IT rack (1), preferably a DC busbar of the power distribution (5).

19. Arrangement according to claim 15, wherein the power supply unit (PSU) has a plurality of mutually redundant and independently interchangeable power supplies, wherein the bus system (40) is configured to address the power supplies independently of each other.

20. Arrangement according to one of the preceding claims, wherein the IT rack (1) has a DC power supply (3) for plug-in devices (2.1) received in the slots (2), with a rectifier (PSU) and a power distribution unit (5), preferably a busbar, which runs along a rear side (R) of the IT rack (1) in the vertical direction (z) of the IT rack (1) and is supplied with a DC voltage by the rectifier (PSU), wherein at least one plug-in device (2.1) of a direct liquid cooling (DLC) unit is received in one of the slots (2) and is electrically contacted with the power distribution unit (5).

21. Arrangement according to claim 20, wherein a plurality of first blind coupling connectors (6.1) for the tool-free connection of direct liquid cooling (DLC) assemblies and / or an IT infrastructure to the power distribution (5) are arranged spaced apart from each other along the power distribution (5) in the vertical direction (z).

22. Arrangement according to claim 20 or 21, wherein the direct liquid cooling (DLC) has at least one coolant distribution channel (7) extending along the rear side (R) of the IT rack (1) in the vertical direction (z) of the IT rack (1), wherein a plurality of second blind coupling connectors (6.2) for tool-free connection of direct liquid cooling (DLC) assemblies and / or an IT infrastructure to the coolant distribution channel (7) are spaced apart from each other along the coolant distribution channel (7) in the vertical direction (z).

23. Arrangement according to one of the preceding claims, wherein the direct liquid cooling (DLC) comprises several insert devices (2.1) which are each accommodated in one of the inserts (2), and of which at least two insert devices (2.1) are designed as redundant insert devices (2.1), preferably redundant pump units (RPU). 24- Arrangement according to one of claims 20 to 23, wherein the rectifier (PSU) is designed as a plug-in device (2.1) which is received in one of the plug-ins (2).

25. Arrangement according to one of the preceding claims, wherein at least one further plug-in device is received or can be received in at least one further of the plug-ins (2), wherein the at least one further plug-in device is a server or an uninterruptible power supply unit (BBU).

26. Arrangement according to one of the preceding claims, wherein the direct liquid cooling (DLC) has at least one further insert device (11), preferably a coolant-carrying assembly of a coolant distribution unit (CDU) of the direct liquid cooling (DLC), particularly preferably a heat exchanger (12) or an expansion vessel (10), wherein the further insert device (11) is received in one of the inserts (2) without contact with the power distribution (5), preferably a busbar.

27. Arrangement according to one of the preceding claims, wherein the slots (2) of the IT rack (1) exclusively accommodate plug-in devices (2.1, 11) for direct liquid cooling (DLC).

28. Arrangement according to claim 27, wherein a pump unit (RPU) forms several of the insert devices (2.1), the insert devices (2.1) forming the pump unit (RPU) are preferably identical parts.

29. Arrangement according to one of the preceding claims, wherein one of the insert devices (2.1) is a control module which may include the control unit (9) and which is inserted into one of the inserts (2) and is configured to control at least one second insert device (2.1) of the direct liquid cooling (DLC) which is inserted into a further of the inserts (2).

30. Arrangement according to claim 29, wherein the second plug-in device (2.1) is connected to the control unit (9) for signal transmission via the bus, preferably a wired data bus, wherein the second plug-in device (2.1) preferably does not have its own control, in particular no control unit (9).

31. Arrangement according to one of the preceding claims, wherein the bus of the arrangement can be connected to the control unit (9) via a multi-pole blind connector (6.1), wherein the blind connector (6.1) preferably has a male and a female part, which are particularly preferably guided relative to each other by means of a self-centering mechanism.

32. Arrangement according to one of the preceding claims, wherein the control unit (9) has a power supply (3.1) for at least one second plug-in unit (2.1) of the direct liquid cooling (DLC) or for another electrical consumer of the direct liquid cooling (DLC).

33. Arrangement according to one of the preceding claims, comprising a plurality of second plug-in devices (2.1), wherein the control unit (9) has a memory or is communicatively connected to a memory independently of the control unit (9) in which a configuration for controlling the plurality of second plug-in devices (2.1) is contained, wherein the plurality of second plug-in devices (2.1) is connected to the control unit (9) via the bus for data transmission and does not have its own control.

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