Arrangement for direct liquid cooling of an it infrastructure, comprising leak-free quick coupling

Abstract

The invention relates to an arrangement for direct liquid cooling (DLC) of an IT infrastructure, wherein the arrangement comprises at least one coolant circuit (15) with a coolant distribution unit (CDU) for providing cooled liquid, wherein an expansion vessel (10) is fluidically connected to the coolant circuit (15) via a leak-free quick coupling (50).

Description

[0001] ARRANGEMENT FOR DIRECT LIQUID COOLING OF AN IT INFRASTRUCTURE WITH LEAK-FREE SNOW DOME

[0002] TECHNICAL AREA

[0003] The present disclosure relates to an arrangement for direct liquid cooling (DLC) of IT infrastructures. In particular, the present disclosure relates to an arrangement with a coolant circuit and a coolant distribution unit (CDU) which includes an expansion vessel.

[0004] BACKGROUND

[0005] In the field of direct liquid cooling (DLC) of IT infrastructures, it is common practice to use coolant circuits to efficiently dissipate heat from electronic components. Well-known systems typically include coolant distribution units (CDUs) that supply cooled fluid and circulate it through a network of pipes and hoses to the components requiring cooling. These systems are designed to reduce the thermal stress on IT components, thereby improving their performance and lifespan.

[0006] A primary function of a Coolant Distribution Unit (CDU) is to distribute coolant to maintain the temperature of devices or components, such as CPUs and GPUs, at an optimal level. A typical CDU consists of several components, including coolant ports, pumps, heat exchangers, and a control unit. The coolant ports allow the coolant, often water or specialized cooling fluids, to enter and exit the system, while pumps circulate the coolant. Many CDUs also include heat exchangers, which are responsible for dissipating heat from the coolant and regulating the temperature. The heat exchanger can be an air-to-liquid heat exchanger or a liquid-to-liquid heat exchanger, into which cooled liquid is fed to cool the fluid supplied to the components requiring cooling.An electronic control unit can monitor the operation of the CDU and, using temperature and pressure sensors, can increase the system's efficiency. A CDU operates by circulating coolant, which is pumped through the system to absorb heat from the equipment being cooled. The control unit continuously monitors the temperature and adjusts the coolant flow to ensure optimal operating conditions. The heated coolant is then passed through a heat exchanger, where it transfers its heat to the environment or an external cooling system.

[0007] According to established techniques, expansion vessels are frequently used in these cooling circuits to compensate for changes in coolant volume due to temperature fluctuations or losses. These expansion vessels are typically integrated into the cooling circuit via rigid connections. Furthermore, the expansion vessels are often difficult to access, complicating maintenance and replacement. This can lead to extended downtime and higher maintenance costs, especially when the expansion vessel needs to be replaced.

[0008] Despite significant advancements in direct liquid cooling, there remains a need for systems that offer improved maintainability and reliability. Specifically, there is a demand for solutions that allow for the simple and safe integration of expansion vessels into the coolant circuit without increasing the risk of leaks. Furthermore, these solutions should provide easy access for maintenance to maximize IT infrastructure uptime and minimize maintenance costs.

[0009] Therefore, one of the technical problems underlying the present invention is to provide an arrangement for the direct liquid cooling (DLC) of an IT infrastructure that at least partially overcomes the disadvantages of known systems and allows for a technically simple replacement of an expansion vessel of the DLC.

[0010] SUMMARY

[0011] According to a particular feature of the invention, the arrangement for direct liquid cooling (DLC) of an IT infrastructure comprises at least one coolant circuit with a coolant distribution unit (CDU) for supplying cooled liquid. An expansion vessel is fluidically connected to the coolant circuit via a leak-free quick-release coupling.

[0012] The term "coolant circuit" refers to the system through which the coolant circulates to dissipate heat from the IT components. The "coolant distribution unit" (CDU) is a central component that receives the coolant from the chillers or free cooling systems and distributes it to the IT equipment at the correct temperature and pressure. An "expansion vessel" compensates for fluctuations in the coolant volume due to temperature changes and stabilizes the pressure in the system. The "leak-free or drip-free quick-connect coupling" allows the expansion vessel to be quickly disconnected and reconnected to the coolant circuit without any loss of fluid. Such a quick-connect coupling is a mechanical connector that enables two pipes or hoses to be connected or disconnected quickly and securely without any fluid leakage.These couplings are designed to prevent leakage of media when the connection is disconnected.

[0013] The quick-release coupling can comprise a pair of valves or consist solely of a pair of valves. At least in the latter case, the valves should be connectable to each other to create a fluidic transition. A first valve can be located on the expansion vessel side. A second valve can be located on the coolant circuit side. A connectable and disconnectable pipe section can be formed between the valves. This pipe section can include a quick-release coupling.

[0014] The coolant circuit can include coolant-carrying lines. It can have a distributor, for example, a coolant distribution channel. Coolant cooled by the CDU (Coolant Distribution Unit) can be supplied to this distributor. The coolant can be routed via the distribution channel to the IT infrastructure components requiring cooling through multiple outlets of a supply channel and via piping. The distributor or coolant distribution channel can have a return channel to which heated fluid from the components requiring cooling is supplied. The return channel thus functions as a collection channel to return the heated fluid to the CDU for recooling. One advantage of the described arrangement is the ability to replace the expansion vessel easily and quickly without having to shut down the entire system.This reduces maintenance times and minimizes IT infrastructure downtime. Another advantage is the increased flexibility and ease of maintenance of the CDU, as the expansion vessel can be removed from one side of the CDU. This is particularly useful in data centers where space and accessibility are often limited. The use of a leak-free quick-release coupling ensures that no coolant escapes when replacing the expansion vessel, thus increasing the safety and cleanliness of the system.

[0015] According to a particular feature of the invention, the expansion vessel is completely enclosed within a housing of the coolant distribution unit. Preferably, at least one pump of the coolant distribution unit is located within this housing. The term "expansion vessel" refers to a container that serves to accommodate volume changes of the coolant in order to compensate for pressure fluctuations in the system. The housing of the coolant distribution unit ensures that all essential components, including the expansion vessel and the pump, are housed compactly and protected. An advantage of this arrangement lies in the improved ease of maintenance and the reduction of downtime, since the expansion vessel is easily accessible and replaceable without having to disconnect the entire coolant distribution unit from the system.

[0016] According to a particular feature of the invention, the housing has an inspection opening through which the expansion vessel is accessible. This inspection opening can preferably be opened and closed by means of a closing element, particularly preferably a flap. The term "inspection opening" refers to a specially designed opening in the housing that allows access to internal components, in this case the expansion vessel. The closing element serves to securely close the inspection opening and to open it as needed, with a flap being a particularly preferred embodiment. An advantage of this arrangement is simplified maintenance, since the expansion vessel is easily accessible without having to shut down the entire system or extensively disassemble the housing. This contributes to reducing maintenance times and minimizing downtime.

[0017] In one embodiment, the arrangement comprises an expansion vessel that is guided and adjustable relative to the housing via a guide, preferably a linear guide, and particularly preferably at least one rail. This means that the expansion vessel can be mounted inside the housing on a rail or similar guide that allows linear movement. This design allows the expansion vessel to be easily moved to access different parts of the system or to service or replace the vessel itself. This is particularly advantageous in combination with an access opening in the housing through which the expansion vessel is guided perpendicular to a cross-section of the access opening. This arrangement makes it possible to pull the expansion vessel out through the access opening, which significantly simplifies maintenance and minimizes downtime.The guide, particularly in the form of a linear guide or rail, ensures that the expansion vessel can be moved stably and precisely, making handling safer and more efficient. The ability to guide the expansion vessel perpendicular to the access opening means that it is not necessary to open the entire housing or disassemble the system to reach the vessel. This is especially advantageous in confined spaces, such as those often found in data centers, where space is at a premium. Furthermore, the guide systems, such as linear guides or rails, are robust and durable, increasing the reliability and lifespan of the entire assembly. Implementing these features significantly simplifies the maintenance of the Cooling Distribution Unit (CDU), resulting in reduced maintenance time and minimized downtime.This is particularly important in environments where continuous cooling of IT equipment is essential to ensure its proper operation. Guiding the expansion vessel on a rail or linear guide ensures that the vessel can be moved precisely and without excessive force, simplifying handling for maintenance personnel and reducing the risk of system damage.

[0018] In one embodiment, the arrangement comprises an expansion vessel connected fluidically to the coolant circuit via a flexible hose. The flexible hose allows for a movable connection, facilitating the installation and maintenance of the expansion vessel by providing flexibility and adaptability to different spatial conditions. A quick-release coupling connects either the expansion vessel to the flexible hose or the flexible hose to the coolant circuit. This quick-release coupling is designed to allow for quick and easy connection and disconnection without requiring system shutdown. This is particularly advantageous in applications requiring continuous cooling, such as data centers where downtime must be minimized.The quick-release coupling ensures a leak-free connection, increasing system safety and efficiency by reducing the risk of coolant leaks and associated damage. Combining these features significantly simplifies expansion vessel maintenance, as it can be replaced quickly and easily. This contributes to reduced maintenance time and increased system reliability. The ability to remove the expansion vessel from one side of the CDU without shutting down the system represents a significant improvement over conventional systems, which often require complete system shutdown and drainage. The flexible hose connection and quick-release coupling thus offer enhanced serviceability and help minimize downtime, which is particularly important in critical applications such as IT equipment cooling.

[0019] In one embodiment, the arrangement is designed such that the expansion vessel is fluidically connected via a leak-free quick-release coupling to a manifold with multiple outlets for cooled fluid or to another coolant-carrying component of the coolant circuit. This quick-release coupling allows for easy and rapid connection and disconnection of the expansion vessel without any fluid leakage. This is particularly advantageous because it significantly simplifies and speeds up the maintenance and replacement of the expansion vessel, resulting in reduced downtime. The quick-release coupling ensures that no leaks occur, thus increasing the safety and reliability of the system. The manifold to which the expansion vessel is connected has multiple outlets that allow for the efficient distribution of the cooled fluid to various parts of the system.This contributes to the uniform cooling of the IT equipment and ensures that the coolant flows through the entire system at the correct temperature and pressure. The ability to connect the expansion vessel to different coolant-carrying components of the cooling circuit offers additional flexibility in designing and adapting the cooling system. This can be particularly useful when the system needs to be expanded or modified to meet changing requirements. Overall, this arrangement offers improved maintainability, greater reliability, and flexibility, making it an attractive solution for use in data centers and other applications where continuous and efficient cooling is critical.

[0020] According to one embodiment, the arrangement comprises direct liquid cooling (DLC) with a coolant primary circuit and a coolant secondary circuit. The coolant primary circuit is typically connected to an external cooling source, such as a chiller system or a free cooling system, which cools the coolant to a low temperature. The coolant secondary circuit, on the other hand, is directly connected to the cooling-requiring components of an IT infrastructure, such as servers or other electronic devices that require constant and efficient cooling. The coolant secondary circuit is cooled by the coolant primary circuit, meaning that the coolant in the secondary circuit, after absorbing heat from the IT components, is returned to the primary circuit where it is cooled again.This arrangement offers several advantages: First, it enables precise temperature control of the IT components, as the secondary circuit is specifically tailored to the requirements of the IT infrastructure. Second, it improves the energy efficiency of the entire cooling system, since the primary circuit continuously provides the necessary cooling without the IT components coming into direct contact with the primary cooling source. Third, it increases the reliability and maintainability of the system, as the secondary circuit can be serviced independently of the primary circuit without having to shut down the entire cooling system. This is particularly important in data centers, where downtime must be minimized. The integration of a coolant primary and secondary circuit into a DLC arrangement thus represents an advanced solution for optimizing the cooling performance and maintainability of IT infrastructures.

[0021] According to one embodiment, the arrangement comprises at least one IT rack with a plurality of vertically stacked slots for direct liquid cooling (DLC) units and / or IT infrastructure. The coolant distribution unit (CDU) and / or at least one component of the coolant distribution unit is designed as a slot-in unit. This arrangement offers several advantages and specific communication mechanisms between the components. Integrating the CDU or its components as a slot-in unit into the IT rack creates a modular and flexible structure that facilitates the replacement and maintenance of individual components. This reduces downtime and increases system reliability, as defective or maintenance-required parts can be replaced quickly and without extensive disassembly of the entire system.The plug-in units are designed for easy access and replacement, significantly simplifying the maintenance process. Another advantage of this arrangement is the efficient use of available space in the IT rack, as the plug-in units are arranged in a compact and organized manner. This allows for a higher density of cooling and IT infrastructure components, which is particularly beneficial in data centers with limited space. Furthermore, the modular design of the plug-in units allows for scaling the overall cooling system's performance by adding additional coolant distribution units or components as needed. The specific communication mechanisms between the components utilize standardized interfaces and connectors, enabling seamless integration and interaction between the various plug-in units and the IT infrastructure.This ensures that the coolant distribution unit can effectively communicate and cooperate with the other components of the IT rack to guarantee optimal cooling of the IT equipment.

[0022] In one embodiment, the expansion vessel is designed as a slide-in unit, housed in a casing specifically designed for insertion into the drawers. This configuration allows for easy and quick maintenance and, if necessary, replacement of the expansion vessel, as it is designed as a modular component of the Cooling Distribution Unit (CDU). The term "slid-in unit" refers to a device that can be installed in a drawer or shaft within a larger system. The casing housing the expansion vessel is specifically designed for this type of installation, meaning it provides the necessary mechanical and hydraulic connections as well as structural support. This embodiment offers several advantages. First, it significantly improves ease of maintenance, as the expansion vessel can be replaced without extensive disassembly of the entire CDU.This significantly reduces system downtime, which is particularly important in data centers where continuous operation and minimal interruptions are crucial. Secondly, the modular design allows for greater flexibility in adapting and expanding the system. For example, if the expansion vessel capacity needs to be increased, this can be achieved by replacing the insert unit without having to replace the entire system. Thirdly, the standardized housing design simplifies warehousing and logistics, as spare parts are more readily available and interchangeable. Finally, the use of a specially designed housing ensures that the expansion vessel is optimally protected and securely integrated into the system, thus increasing the lifespan and reliability of the entire cooling system.In one embodiment, the expansion vessel housing is designed independently of any housing of the coolant distribution unit (CDU). This means that the expansion vessel is not permanently integrated into the CDU housing but has a separate housing. This design allows for more flexible handling and maintenance of the expansion vessel, as it can be removed and replaced independently of the CDU. A key feature of this embodiment is the separation of the housings, which enables simpler and faster maintenance of the expansion vessel without having to disassemble the entire CDU. This is particularly advantageous in data centers, where minimizing downtime and increasing maintenance efficiency are of paramount importance. The independent housing design makes the expansion vessel easily accessible, which significantly simplifies replacement in the event of a defect or necessary maintenance.Furthermore, the CDU can remain operational while the expansion vessel is serviced or replaced, ensuring the continuity of the coolant circuit and maximizing uptime. Another advantage of this design is the increased flexibility in the layout and placement of components within the data center. Because the expansion vessel is not permanently integrated into the CDU, it can be positioned at various locations within the data center to optimize space utilization and improve serviceability. This design significantly contributes to improved maintenance processes and reduced downtime, which is of great interest to data center operators. The expansion vessel's independent housing design ensures that maintenance and replacement of this component can be performed quickly and efficiently without disrupting the operation of the entire coolant distribution unit.

[0023] In one embodiment, the housing has an access panel through which the expansion vessel is accessible. This access panel is located on an end face of the housing, perpendicular to the insertion direction of the housing into one of the slots. This arrangement improves accessibility and serviceability of the expansion vessel within the Cooling Distribution Unit (CDU). By placing the access panel on the end face of the housing, perpendicular to the insertion direction, it is easier for maintenance personnel to reach and replace the expansion vessel without having to remove the entire CDU from the rack or housing. This is particularly advantageous in confined data center environments where space is limited and removing large components can be time-consuming and cumbersome.The access panel allows for quick and efficient maintenance or replacement of the expansion vessel, minimizing system downtime and increasing operational efficiency. Furthermore, the access panel can be equipped with a locking element, preferably a flap, that securely closes the housing while still providing easy access. This design contributes to maintaining system integrity and security by preventing unauthorized access and facilitating maintenance. The specific placement of the access panel on the front of the housing thus offers a practical solution to the challenges of maintaining and replacing expansion vessels in CDUs used in modern data centers. This results in reduced maintenance times and increased system availability, which is of great interest to data center operators.The invention thus represents a significant improvement over the prior art by increasing the flexibility and ease of maintenance of CDUs while simultaneously reducing operating costs.

[0024] In one embodiment, the direct liquid cooling system is modularly equipped with several plug-in units, preferably hot-swappable. This means that the plug-in units can be replaced during operation without shutting down the entire system. This hot-swap capability is particularly advantageous with regard to connecting to the coolant circuit of the direct liquid cooling system and / or to the power supply for the direct liquid cooling system. The modularity of the plug-in units significantly improves the flexibility and ease of maintenance of the system. The plug-in units can be replaced quickly and easily as needed, minimizing downtime and ensuring operational continuity. Connection to the coolant circuit is achieved via special couplings that guarantee a quick and secure connection.This allows coolant circulation to be maintained even if a unit is removed or replaced. Similarly, the power supply connection is designed to ensure uninterrupted operation. These features contribute to increasing the reliability and efficiency of the cooling system by ensuring continuous cooling of the IT components. The modularity and hot-swap capability of the units also offer the advantage of easy system scalability. As cooling capacity requirements increase, additional units can be easily added without requiring extensive modifications or system downtime.According to one embodiment, the arrangement comprises at least a first plug-in unit designed for direct liquid cooling (DLC) and a coolant distribution unit (CDU), as well as a second plug-in unit that is an assembly of a coolant distribution unit (CDU). The first plug-in unit is independent of the assembly of the second plug-in unit. The term "plug-in unit" refers to modular components that can be integrated into a larger system to perform specific functions. In this case, these are components used in a DLC system to ensure the cooling of IT equipment. The coolant distribution unit (CDU) is a key component in such systems, ensuring that the coolant is distributed efficiently and that the correct temperature and pressure are maintained.

[0025] The independence of the first plug-in unit from the assembly of the second offers several advantages. First, it allows for greater flexibility in maintenance and component replacement. Because the first plug-in unit is not permanently attached to the assembly, it can be easily removed and replaced as needed without shutting down the entire system. This significantly reduces downtime and increases system reliability. Second, the modular design facilitates system scalability. New or additional plug-in units can be easily integrated to increase system performance or respond to changing requirements. Third, the separation of components contributes to improved system efficiency, as each component can be optimized and maintained independently.

[0026] The specific communication mechanisms or means of interaction between the components are designed to ensure seamless integration and efficient operation. This includes the use of leak-free quick-connect couplings, which allow for easy and secure connection of the coolant lines. These couplings prevent coolant from escaping during component replacement, thus helping to maintain fluid quality. Furthermore, flexible hoses ensure easy handling and adjustment of the components within the housing. The use of such mechanisms ensures that the coolant distribution unit and the associated plug-in devices work together efficiently to guarantee optimal cooling of the IT equipment.According to one embodiment, the arrangement comprises a coolant distribution unit (CDU) in which at least one component, such as a control unit or an expansion vessel, is located outside the housing of the first plug-in unit and either inside or outside the IT rack. This specific arrangement allows for increased flexibility and accessibility of the components, which is particularly advantageous for maintenance and repair work. The control unit, which regulates and monitors the coolant distribution, can thus be accessed and serviced more easily without having to open the entire housing of the plug-in unit. Similarly, the expansion vessel, which is responsible for accommodating volume fluctuations in the coolant, can be replaced more easily, significantly reducing system downtime.Positioning the expansion vessel outside the housing of the first rack-mount unit also allows for more ergonomically advantageous placement of the assemblies for the maintenance technician, further increasing maintenance efficiency. Furthermore, the placement inside or outside the IT rack can be flexibly configured depending on the specific requirements and spatial conditions in the data center. This helps optimize available space and allows for better adaptation to different rack layouts. The option of positioning the expansion vessel outside the housing also facilitates the use of quick-connect couplings, ensuring a fast and leak-free connection to the secondary coolant system circuit. This is particularly important for maintaining the continuity of the cooling circuit and preventing unwanted interruptions.

[0027] In one embodiment, the arrangement comprises an expansion vessel connected to a direct liquid cooling (DLC) distribution channel via a leak-free quick-release coupling. This arrangement enables efficient and maintenance-friendly integration of the expansion vessel into the cooling system. The quick-release coupling provides a reliable connection that minimizes the risk of leaks while allowing for quick and easy replacement of the expansion vessel. This is particularly advantageous in systems that must operate continuously, such as in data centers, as it significantly reduces maintenance time and minimizes downtime. Direct liquid cooling (DLC) is a technology of increasing importance because it enables efficient cooling of microchips and other IT components.Integrating the expansion vessel into the coolant distribution channel ensures that the coolant is pumped through all IT equipment at the correct temperature and pressure. The use of a leak-free quick-release coupling eliminates the need to shut down the system during expansion vessel replacement, further enhancing operational efficiency. This quick-release coupling also contributes to system flexibility, allowing for easy adaptation and expansion of the cooling circuit. This is particularly important in environments where cooling requirements can fluctuate and rapid adjustments are necessary. Overall, this configuration offers improved maintainability, increased reliability, and flexibility, making it an attractive solution for modern cooling systems in the IT industry.

[0028] According to one embodiment, the arrangement comprises a plurality of plug-in units that perform specific functions within a cooling system. These plug-in units may include, among other things, a coolant distribution unit (CDU), responsible for distributing the coolant to the IT equipment, and a coolant pump unit (RPU), preferably equipped with redundant pumps to ensure high reliability and fault tolerance. A heat exchanger is also included to facilitate heat transfer between the various circuits. The expansion vessel compensates for coolant volume changes due to temperature fluctuations and is easily replaceable via a quick-release coupling, which significantly simplifies maintenance. Pressure and temperature sensors continuously monitor the system's operating conditions to ensure optimal performance.A three-way valve with a bypass valve allows for flexible control of the coolant flow, while an AC power supply provides the necessary energy for operating the various components. A control unit coordinates the functions of the different modules and ensures smooth interaction between them. A service valve facilitates easy maintenance and draining of the system, while a filter removes impurities from the coolant to guarantee fluid quality. An automatic air vent removes trapped air from the system, improving cooling efficiency. Finally, a pressure relief valve ensures that the system pressure remains within safe limits to prevent damage to the components. The integration of these various modules in a modular arrangement allows for high flexibility and scalability of the cooling system.This is particularly advantageous in data centers, where the demands on cooling capacity and reliability are constantly increasing. The modular design allows individual components to be easily replaced or upgraded as needed, without having to shut down the entire system. This reduces maintenance time and minimizes downtime, which is crucial for the continuous operation of IT infrastructures.

[0029] In one embodiment, a direct liquid cooling pump unit is designed as one of at least two plug-in direct liquid cooling units. This configuration allows for a modular and flexible design of the cooling system by simplifying maintenance and component replacement. The pump unit responsible for direct liquid cooling can be designed as a plug-in unit that is easily accessible and replaceable. This means that in the event of a defect or for maintenance, the pump unit can be removed and replaced without significant effort and without having to shut down the entire system. This modular design helps to minimize downtime and reduce maintenance costs, which is particularly important in data centers where continuous cooling of IT equipment is essential.The use of at least two plug-in units also provides redundancy, increasing the reliability of the cooling system. Should one pump unit fail, the second can continue operation until the defective unit is replaced. This ensures uninterrupted cooling and protects the IT infrastructure from overheating and potential damage. Direct liquid cooling is an advanced technology that enables efficient heat dissipation, thus improving the performance and lifespan of IT equipment. Integrating pump units as plug-in devices increases the flexibility and scalability of the cooling system, as additional pump units can be easily added or removed as needed. This is particularly advantageous in environments where cooling requirements may vary.The pump units can also be designed to deliver different coolant flows and pressures to meet the specific requirements of the connected IT equipment.

[0030] In one embodiment, the arrangement comprises a pump unit that forms several insert units, these insert units preferably being identical. This configuration allows for a modular and flexible design of the pump unit, which significantly simplifies the replacement and maintenance of the individual components. The use of identical parts for the insert units offers the advantage of simplified inventory management and reduces the need to keep various spare parts in stock. This leads to cost reductions and increased efficiency in the maintenance process. The pump unit, which forms several insert units, also enables improved scalability of the system. If required, additional insert units can be easily added to increase the performance of the pump unit without requiring extensive modifications to the existing infrastructure.This is particularly advantageous in data centers, where cooling capacity requirements can fluctuate rapidly. The use of identical components in the rack-mount units also contributes to standardization and simplification of the manufacturing process, as the same components can be used for different units. This leads to reduced production costs and faster manufacturing times. Furthermore, the modular design of the pump unit allows for easy system customization and expansion, increasing flexibility and adaptability to varying operating conditions. The ability to design the rack-mount units as identical components also reduces system complexity, as fewer different components need to be integrated. This facilitates troubleshooting and problem resolution, as technicians are familiar with the standardized parts and can quickly identify and replace them.Overall, the arrangement with the pump unit forming several plug-in devices offers a number of advantages, including improved maintainability, cost efficiency, flexibility and scalability, making it an attractive solution for use in demanding environments such as data centers.

[0031] According to one embodiment, the arrangement comprises several plug-in pump units, which are identical and preferably redundant with respect to their pumping capacity for a direct liquid cooling system, and are preferably connected in series. The identical pump units allow for easy interchangeability and maintenance, as identical components are used, simplifying inventory management and replacement in case of a defect. The redundancy with respect to pumping capacity ensures that the system remains functional even if one pump fails, thus increasing the reliability and availability of the cooling system. This is particularly important in data centers, where continuous cooling is essential for the operation of IT equipment.Redundancy can be achieved by connecting the pumps in parallel or in series. Series connection offers the advantage of increasing system pressure, thus improving cooling efficiency. The use of identical components also allows for a modular pump unit design, increasing the system's flexibility and scalability. This means that additional pump modules can be easily added as cooling demands increase, without requiring a complete system redesign. The redundant design of the pump unit also contributes to extending the system's lifespan, as the load is distributed across multiple pumps, reducing wear on individual components. Furthermore, the modular design simplifies maintenance and component replacement, as defective pump modules can be easily removed and replaced without shutting down the entire system.This minimizes downtime and increases the availability of the cooling system, which is crucial for data center operations. The pumps connected in series also ensure an even distribution of coolant throughout the system, further improving cooling efficiency. Overall, the described configuration offers high reliability, flexibility, and ease of maintenance, making it an ideal solution for cooling IT equipment in data centers.

[0032] According to one embodiment, the invention comprises an arrangement in which several plug-in units of the pump unit are configured such that if one of the plug-in units fails, the remaining plug-in units can continue to provide the required pumping capacity. This configuration ensures that the coolant distribution in a direct liquid cooling (DLC) system is not interrupted even in the event of a unit failure. The plug-in units are modular and can be hot-swapped. This means that a defective plug-in unit can be removed and replaced with a new one without having to shut down the entire system. This redundancy and hot-swap capability contribute to increasing the reliability and availability of the cooling system by minimizing downtime and simplifying maintenance.The pump unit, consisting of several plug-in units, is designed to maintain the necessary pumping capacity even if one unit fails. This is achieved through intelligent control and workload distribution across the remaining units. One advantage of this configuration is the continuous cooling of the IT equipment, which is particularly important in data centers where constant and reliable cooling is essential to ensure the operational readiness of servers and other IT components. Another benefit is the system's flexibility in maintenance and expansion. Because the plug-in units can be hot-swapped, maintenance can be performed without interrupting the entire system. This results in greater efficiency and lower operating costs.Furthermore, the modular design allows for easy scalability of the system by adding additional modules as needed to increase pumping capacity. The redundancy of the modules ensures that the system remains functional even in the event of a module failure, thus increasing the reliability and fault tolerance of the cooling system. According to one embodiment, the arrangement comprises a direct liquid cooling (DLC) system with several modules designed as individual modules, each containing at least two identical or structurally identical modules. These modules preferably include several identical or structurally identical pump units (RPUs), with at least two of these pump units being configured as redundant pump units. The use of identical or structurally identical modules and pump units offers several advantages.First, the modularity of the plug-in units allows for easy scalability and flexibility in adapting cooling capacity to different requirements. This is particularly useful in data centers, where cooling requirements can vary depending on the number and power of the servers in operation. Second, the redundancy of the pump units significantly increases system reliability. Redundant pump units ensure that the system remains operational even if one pump unit fails, minimizing downtime and increasing operational reliability. This is especially important for applications requiring continuous cooling to prevent overheating and associated hardware damage. Furthermore, the identical design of the pump units simplifies the maintenance and replacement process, as spare parts are standardized and can therefore be procured more quickly and cost-effectively.The option of designing the pump units as slide-in devices also contributes to ease of maintenance, as defective units can simply be pulled out and replaced without having to shut down the entire system. This reduces maintenance time and increases system availability.

[0033] In one embodiment, the arrangement comprises a housing containing at least two redundant pumps, preferably connected in parallel. These pumps are configured to operate together to increase the reliability and efficiency of the cooling system. Redundant pumps mean that if one pump fails, the other can continue operating, minimizing downtime and improving the system's ease of maintenance. Furthermore, the housing is free of a compressor, expansion vessel, and condenser, meaning it contains no additional active components of a chiller. This simplifies the system and reduces potential points of failure. Eliminating these additional components also reduces the space required within the housing, resulting in a more compact design.This is particularly advantageous in data centers, where space is a precious commodity. The arrangement is also preferably free of all other active components of a chiller, which further simplifies maintenance and increases system reliability. Integrating the redundant pumps into a separate housing increases the system's modularity, meaning that individual components can be more easily replaced or serviced as needed without having to shut down the entire system. This helps minimize downtime and improves overall operational efficiency. The redundant pumps are preferably connected in parallel, meaning they can operate simultaneously to ensure even coolant distribution. This is especially important for liquid cooling of microchips, where constant and reliable cooling is required to guarantee optimal IT equipment performance.The parallel connection of the pumps also allows for better control over the flow and pressure of the coolant, resulting in more efficient cooling.

[0034] In one embodiment, the arrangement comprises a housing containing at least one heat exchanger. This heat exchanger plays a central role in cooling IT infrastructure by circulating the coolant through an inner circuit supported by redundant pumps. These redundant pumps ensure continuous and reliable cooling, even if one of the pumps fails. The heat exchanger can be designed as a liquid-to-liquid heat exchanger, meaning it has two separate liquid circuits: an inner circuit and an outer circuit. The inner circuit of the heat exchanger is responsible for directly cooling the IT components by circulating the coolant through the IT equipment.The outer circuit, on the other hand, is connected to, or can be connected to, a recooler to lower the temperature of the heated coolant before it is fed back into the inner circuit. This configuration offers several advantages: First, it enables efficient and targeted cooling of the IT infrastructure, improving the performance and lifespan of IT components. Second, the pump redundancy ensures high operational reliability, as the failure of one pump does not lead to the failure of the entire cooling system. Third, the use of a liquid-to-liquid heat exchanger allows for flexible adaptation to different cooling requirements and environmental conditions, as the outer circuit can be combined with various recooling systems. This contributes to optimizing energy consumption and reducing operating costs.Furthermore, the modular design of the arrangement facilitates maintenance and component replacement, minimizing downtime and maximizing cooling system availability. Exemplary embodiments of the invention are explained with reference to the figures below. These show:

[0035] Figure 1 Schematic representation of an embodiment of a direct liquid cooling (DLC) system with a coolant distribution unit (CDU) for cooling a plurality of slide-in devices;

[0036] Figure 2 shows an embodiment of a coolant distribution unit (CDU) with a replaceable expansion vessel accessible via a guide and an inspection opening;

[0037] Figure 3 in side view shows an embodiment of an IT rack with several stacked slots for plug-in devices, and with direct liquid cooling comprising a coolant distribution unit (CDU);

[0038] Figure 4 shows a schematic representation of an embodiment of a coolant distribution system (CDU with redundant pumps and power supplies;

[0039] Figure 5 shows a schematic representation of another embodiment of a coolant distribution system (CDU) with additional components such as a heat exchanger and several pumps;

[0040] Figure 6 shows a schematic representation of another embodiment of a coolant distribution unit (CDU) with various components, including an expansion vessel, pumps, power supplies, fans and sensors;

[0041] Figure 7a shows a schematic representation of an embodiment of an IT rack in front view with several stacked slots for plug-in devices such as servers and components of a direct liquid cooling system, comprising a coolant distribution unit (CDU); Figure 7b shows a schematic representation of the embodiment according to Figure 7a in side view.

[0042] Figure 8 shows a schematic representation of an embodiment of an IT rack in side view with several stacked slots for plug-in devices, wherein the plug-in devices are exclusively components of a direct liquid cooling system.

[0043] Figure 1 shows a schematic representation of a direct liquid cooling (DLC) system for an IT infrastructure. The system includes, by way of example, several essential components that are fluidically and / or thermally interconnected to ensure efficient cooling of the plug-in devices of an IT infrastructure.

[0044] Several insert units 2 are shown, arranged one above the other in the vertical direction z. These insert units 2 are connected to a coolant distribution channel 7, which distributes the cooled fluid to the individual insert units. The coolant distribution channel 7 is connected to the coolant distribution unit CDU via the coolant secondary circuit 15. The coolant primary circuit 17 and the coolant secondary circuit 15 are fluidically separated from each other and thermally coupled to each other in the CDU via a heat exchanger, for example, a plate heat exchanger.

[0045] The coolant distribution unit (CDU) is the central element of the system and is responsible for distributing the coolant from the secondary circuit 15 to the various components of the IT infrastructure. The CDU is connected via the primary coolant circuit 17 to a recooler 16, which cools the coolant from the primary circuit 17 before it is returned to the CDU and finally to the rack units 2. The recooler 16 can be a chiller.

[0046] The coolant secondary circuit 15 transports the cooled coolant from the CDU to the plug-in units 2, while the coolant primary circuit 17 returns the coolant from the recooler 16 to the CDU. The recooler 16 is equipped with fans that remove heat from the coolant, thus bringing it to the desired temperature. This arrangement enables efficient and reliable cooling of the IT infrastructure by ensuring continuous coolant circulation and heat dissipation from the IT components. Thanks to the modular design of the plug-in units 2 and the use of quick-connect couplings, the system can be easily maintained and expanded as needed without significant downtime.

[0047] In summary, Figure 1 illustrates a DLC system that ensures effective cooling of the IT infrastructure through the combination of coolant distribution unit CDU, coolant distribution channel 7, recooler 16 and several plug-in units 2.

[0048] Figure 2 shows a schematic representation of a coolant distribution unit (CDU) for the direct liquid cooling of an IT infrastructure. The CDU is housed in a casing 13 and contains several essential components that are crucial for the operation and maintenance of the system.

[0049] The housing 13 contains several pumps 14 arranged in series, which circulate the coolant through the coolant secondary circuit. The pumps 14 are configured to provide redundant pumping capacity to increase the reliability of the system.

[0050] An expansion vessel 10 is arranged inside the housing 13 and is guided and adjustable relative to the housing 13 by a guide 53, preferably a linear guide. The expansion vessel 10 can be accessed through an inspection opening 51 located on the front of the housing 13. The inspection opening 51 can be closed with a closing element 52, preferably a flap, to facilitate access and ensure safety.

[0051] The expansion vessel 10 is connected to the coolant circuit via a leak-proof quick-release coupling 50 and a flexible hose 54. This allows for easy and quick replacement of the expansion vessel 10 without having to shut down the entire system. The quick-release coupling 50 ensures a secure and leak-free connection, which significantly improves the ease of maintenance of the system. Several blanking plug connectors 6.1, 6.2 are located on the top of the housing 13, which can be used for connection to external components and systems, in particular for connection to a coolant distribution channel (not shown) of the secondary circuit and for connection to the primary circuit for recooling the secondary circuit.A temperature and humidity sensor 23 and an air differential pressure sensor 26 are also integrated to monitor the operating conditions within the secondary circuit and to ensure that the coolant circulates with the correct parameters.

[0052] In summary, Figure 1 shows a detailed representation of a modular and maintenance-friendly coolant distribution unit (CDU) for the direct liquid cooling (DLC) of an IT infrastructure. The integration of redundant pumps and an easily accessible and replaceable expansion vessel ensures reliable and efficient system operation.

[0053] Figure 3 shows a detailed representation of an IT rack 1 with an integrated coolant distribution unit (CDU) for direct liquid cooling (DLC) of IT infrastructure. The IT rack 1 comprises several trays 2 arranged one above the other in the vertical direction z of the IT rack 1. These trays 2 house various plug-in devices 2.1, in particular server trays and a CDU.

[0054] The expansion vessel 10 is located outside the housing of the coolant distribution unit (CDU) in an upper area of ​​the IT rack 1, specifically on the roof of the IT rack 1, and is not housed in any of the slots 2. The expansion vessel 10 is connected to the coolant distribution channel 7 via a flexible line 54 and a leak-free quick-release coupling 50. The coolant distribution channel 7 supplies cooled fluid to the various components of the IT rack 1. The coolant distribution unit (CDU) is integrated in the lower area of ​​the IT rack 1 and includes several pumps 14 that circulate the coolant through the coolant secondary circuit 15.

[0055] A rear-door cooling unit 200 is mounted on the back of IT rack 1 and cools the heated air flowing through the IT components. This allows the air temperature in the data center to be maintained at a constant 22°C. The waste heat from the rack units 2.1 is dissipated via the coolant primary circuit 17. The coolant primary circuit 17 carries the coolant to a recooler 16, which cools the coolant to a temperature of 17°C. Heat is transferred from the secondary circuit to the primary circuit via a plate heat exchanger (heat transfer 12) in the CDU.

[0056] The server bays 2 incorporate several CPU cooling plates 3, which are directly connected to the coolant circuit and efficiently dissipate the heat from the CPUs. The coolant distribution unit CDU also includes a heat exchanger 12, which transfers heat between the coolant secondary circuit 15 and the coolant primary circuit 17.

[0057] The illustrated arrangement enables modular and maintenance-friendly cooling of the IT infrastructure. The expansion vessel 10 can be easily replaced without having to shut down the entire system. This is achieved through the use of the leak-free quick-release coupling 50 and the flexible hose 54, which allow for easy disconnection and reconnection of the expansion vessel 10.

[0058] The coolant distribution unit CDU is also equipped with various sensors, including pressure and temperature sensors, which monitor the operating parameters of the coolant in the secondary circuit and ensure that the IT components are always optimally cooled. A control unit 9 is also integrated and controls, for example, the pumps 14 and the valves of the system to guarantee uniform and reliable cooling.

[0059] In summary, Figure 3 shows an exemplary, highly integrated and efficient solution for the direct liquid cooling of IT infrastructures, which impresses with its modular design and ease of maintenance.

[0060] Figure 4 shows a schematic representation of a coolant distribution unit CDU 13 in an IT rack 1. The CDU is designed as a plug-in unit 2.1 and comprises several essential components. The power supply units PS I and PS2 are arranged inside the housing 13 and ensure redundant power supply. The pump units 14 are also integrated into the housing 13 and ensure the circulation of the coolant in the secondary circuit. The blind coupling connectors 6.1 and 6.2 enable a simple and leak-free connection of the CDU to the coolant circuit. The power supply unit 19 provides energy to the electrical components of the CDU. Figure 5 shows an extended version of the coolant distribution unit CDU 13, which, in addition to the configuration described in Figure 4, includes a third power supply unit PS3 and a heat exchanger 12. The additional power supply unit PS3 increases the redundancy and reliability of the system.The heat exchanger 12 enables heat exchange between the coolant and an external cooling circuit. In this embodiment, the pump units 14 are arranged in a redundant configuration to ensure continuous cooling even in the event of a pump failure. Multiple blind coupling connectors 6.1 and 6.2 are provided to allow connection to several cooling circuits.

[0061] Both figures illustrate the modular design of the CDU, which allows for easy maintenance and expansion of the system. The use of redundant components and leak-free quick-release couplings contributes to the system's high reliability and ease of maintenance.

[0062] Figure 6 shows a schematic representation of a coolant distribution unit CDU 2.1, which is housed in a casing 13. This CDU is designed for the direct liquid cooling (DLC) of an IT infrastructure and contains several essential components, which are described below.

[0063] Housing 13 contains two redundant power supplies 19 (PS I and PS2) responsible for powering the unit. These power supplies ensure an uninterrupted power supply, which is crucial for the continuous operation of the coolant distribution unit.

[0064] A key element of the CDU is the expansion vessel 10, which is connected to the coolant circuit via a flexible hose 54. The connection is made using a leak-free quick-release coupling 50, which allows for quick and easy replacement of the expansion vessel without having to shut down the system. This is particularly important for minimizing maintenance and downtime.

[0065] Within the housing 13 are also two pumps 14, which are redundantly designed to ensure high reliability and availability. These pumps circulate the coolant through the system and ensure that the cooled fluid reaches the IT infrastructure components requiring cooling.

[0066] Another important component of the CDU is the heat exchanger 12, which is also integrated into the housing 13. The heat exchanger enables heat exchange between the coolant and the ambient air or another cooling medium. Two fans 20 are mounted on the underside of the housing and support heat dissipation through the heat exchanger 12.

[0067] In addition, several sensors are integrated into the system, including temperature sensors (T) and pressure sensors (P), which continuously monitor the operating conditions. These sensors are crucial for controlling and monitoring the cooling circuit to ensure optimal cooling performance.

[0068] The CDU is designed with a modular structure and can be integrated as a plug-in device into an IT rack. This allows for easy installation and maintenance, as individual modules can be replaced as needed without interrupting the operation of the entire system.

[0069] In summary, Figure 6 shows a detailed representation of a modular coolant distribution unit (CDU) for direct liquid cooling (DLC) of IT infrastructures. The unit includes redundant power supplies, pumps, an expansion vessel, a heat exchanger, and various sensors, all housed in a compact enclosure, ensuring high reliability and ease of maintenance.

[0070] Figure 7 shows two embodiments of an IT rack with a coolant distribution unit CDU and several plug-in units for direct liquid cooling DLC ​​of an IT infrastructure.

[0071] Figure 7a shows an IT rack with several slots 2 in the vertical direction z. Various IT components, such as servers and power supply units (PSUs), are arranged in the slots 2. The coolant distribution unit (CDU) is integrated as a slot unit 2.1 at the bottom of the rack. Power is supplied 3 via a bus bar 5 that extends along the rear of the rack. A distributor 7 is also mounted at the rear of the rack and serves to distribute the coolant. Figure 7b shows a similar arrangement, but with additional details regarding the connection and positioning of the components. The slot units 2.1 are arranged in slots 2, with the insertion direction x indicated. The expansion vessel 10 is positioned on the rack at the rear R and connected to the coolant circuit via a leak-free quick-release coupling.Power is supplied via a power rail 5, which runs along the back of the rack. The distributor 7 is mounted at the back of the rack and serves to distribute the coolant.

[0072] The housing 13 of the coolant distribution unit CDU is positioned at the bottom of the rack and contains the necessary components for cooling the IT infrastructure. An access panel in the housing 13 provides access to the expansion vessel, which is preferably guided and adjustable relative to the housing 13 by a guide, preferably a linear guide. The expansion vessel can be connected to the coolant circuit via a flexible hose, with the quick-release coupling either connecting the expansion vessel to the flexible hose or the flexible hose to the coolant circuit.

[0073] The arrangement allows for easy maintenance and replacement of the expansion vessel 10 without having to shut down the entire system. This reduces maintenance time and minimizes downtime, which is crucial for data center operations. Furthermore, the modular design of the direct liquid cooling (DLC) system with multiple slot-in units 2.1 enables flexible adaptation and expansion of the system to meet the requirements of the IT infrastructure.

[0074] Figure 8 shows a schematic representation of an IT rack 1 with a modular arrangement for direct liquid cooling (DLC). The IT rack 1 comprises several plug-in units arranged vertically in the z-direction. These plug-in units are exclusively direct liquid cooling units. In particular, no IT infrastructure components are included, especially no server modules.

[0075] In the upper section of the rack is a DC power supply unit 3 (PSU AC / DC), which is powered via an AC DC connection. Directly below it is a control unit 9, responsible for controlling the various modules. The DC power supply unit 3 can be configured as a plug-in device. The IT rack 1 contains several pump units (RPU modules) mounted in slots 8. These RPU modules are arranged along the insertion direction x and are equipped with blind coupling connectors 6.1 and 6.2, enabling quick and easy connection. The blind coupling connectors 6.1 and 6.2 are connected to a coolant distribution channel 7, which distributes the cooled fluid.

[0076] The lower section of the rack houses an expansion vessel 10 and a heat exchanger 12. The expansion vessel 10 is connected to the coolant circuit via a leak-free quick-release coupling, allowing for easy replacement. The heat exchanger 12 is responsible for heat exchange between the coolant and the ambient air. Alternatively, the heat exchanger 12 can be configured as a plate heat exchanger for heat transfer between a primary coolant circuit and the secondary coolant circuit of the DLC.

[0077] The housing 11 of the IT rack 1 has guides 8 that enable linear movement of the plug-in devices. These guides 8 are preferably designed as rails that ensure stable and precise positioning of the plug-in devices.

[0078] The design allows for a modular and flexible configuration of the direct liquid cooling system, with individual components such as pump units, control unit, expansion vessel, and heat exchanger being easily accessible and replaceable. This reduces maintenance time and minimizes system downtime, which is particularly important in data centers.

[0079] The features of the invention disclosed in the foregoing description, the drawing, and the claims can be essential for the realization of the invention, both individually and in any combination. REFERENCE MARK LIST

[0080] 1 IT rack

[0081] 2 Insert

[0082] 2.1 Insert device

[0083] 3 DC power supply

[0084] 3-1 DC connection

[0085] 5 busbar

[0086] 6.1 First blind coupling connector

[0087] 6.2 Second blind coupling connector

[0088] 6-3 third blind coupling connector

[0089] 7 Distributor / Coolant distribution channel

[0090] 8 linear guides

[0091] 9 Control unit

[0092] 9-1 Storage tank io Expansion vessel

[0093] 12 heat exchangers

[0094] 13 cases

[0095] 14 Pump

[0096] 15 Coolant secondary circuit / inner circuit

[0097] 16 cooling units

[0098] 17 Coolant primary circuit / outer circuit

[0099] 19 Power supply

[0100] 20 fans

[0101] 23 Temperature and humidity sensor

[0102] 26 air differential pressure ens or

[0103] 50 leak-free quick couplings

[0104] 51 Revision opening

[0105] 52 Locking element

[0106] 53 Leadership

[0107] 54 flexible hose

[0108] 200 rear door refrigerator

[0109] CDU coolant distribution unit

[0110] DLC direct liquid cooling PSU rectifier

[0111] RPU pump unit

[0112] R Back side x Insertion direction z Height direction

Claims

Claims:

1. Arrangement for the direct liquid cooling (DLC) of an IT infrastructure, wherein the arrangement has at least one coolant circuit (15) with a coolant distribution unit (CDU) for providing cooled liquid, characterized in that an expansion vessel (10) is fluidically connected to the coolant circuit (15) via a leak-free quick coupling (50).

2. Arrangement according to claim one, wherein the expansion vessel (10) is completely enclosed in a housing (13) of the coolant distribution unit (CDU), wherein the housing (13) preferably also includes at least one pump (14) of the coolant distribution unit (CDU).

3. Arrangement according to claim two, wherein the housing has an inspection opening (51) through which the expansion vessel (10) is accessible, wherein the inspection opening (51) is preferably openable and closable via a closing element (52), particularly preferably a flap.

4. Arrangement according to claim 2 or 3, wherein the expansion vessel (10) is guided and adjustable via a guide (53), preferably a linear guide, particularly preferably at least one rail, with respect to the housing (13), wherein, in the case that the housing (13) has an inspection opening (51), the expansion vessel (10) is guided perpendicular to a cross-section of the inspection opening (51) through the inspection opening (51).

5. Arrangement according to one of the preceding claims, wherein the expansion vessel (10) is fluidically connected to the coolant circuit (15) via a flexible hose (54), wherein the quick coupling (50) either fluidically connects the expansion vessel (10) to the flexible hose (54) or the flexible hose (54) to the coolant circuit (15).

6. Arrangement according to one of the preceding claims, wherein the expansion vessel (10) is connected to a leak-free quick coupling (50) via a Distributor (7) with a plurality of outlets for cooled liquid or component of the coolant circuit (15) leading to another coolant is fluidically connected.

7. Arrangement according to the preceding claims, wherein the direct liquid cooling (DLC) has a coolant primary circuit (17) and a coolant secondary circuit (15), wherein the coolant secondary circuit (15) is cooled back by the coolant primary circuit (17) and cooled liquid is supplied via the coolant secondary circuit (15) to cooling-requiring components of an IT infrastructure.

8. Arrangement according to one of the preceding claims, comprising at least one IT rack (1) with a plurality of vertically arranged slots (2) for plug-in devices (2.1) of direct liquid cooling (DLC) and / or an IT infrastructure, wherein the coolant distribution unit (CDU) and / or at least one component of the coolant distribution unit (CDU) is designed as a plug-in device (2.1).

9. Arrangement according to claim 8, wherein the expansion vessel (10) is designed as a slide-in device (2.1), for which the expansion vessel (10) is preferably received in a housing (13) designed for receipt in the slide-in slots (2).

10. Arrangement according to claim 9, wherein the housing of the expansion vessel (10) is designed independently of any housing (13) of the coolant distribution unit (CDU).

11. Arrangement according to one of claims 8 to 10, wherein the housing (13) has an inspection opening (51) through which the expansion vessel (10) is accessible, wherein the inspection opening (51) is arranged on an end face of the housing (13) which is arranged perpendicular to an insertion direction (x) of the housing (13) into one of the slots (2).

12. Arrangement according to one of the preceding claims, wherein the direct liquid cooling (DLC) is modularly designed with several plug-in devices (2.1) which are preferably hot-swappable, particularly preferably with regard to a connection to the coolant circuit (15) of the direct liquid cooling (DLC) and / or to a connection to a power supply (5) of the direct liquid cooling (DLC).

13. Arrangement according to any one of claims 8 to 12, wherein at least one first of the direct liquid cooling (DLC) insert devices (2.1) is the coolant distribution unit (CDU) and the second is an assembly of a coolant distribution unit (CDU), wherein the first insert device (2.1) is free of the assembly.

14. Arrangement according to claim 13, wherein the at least one assembly of the coolant distribution unit (CDU), preferably a control unit (9) and / or the expansion vessel (10) of the coolant distribution unit (CDU), is arranged outside a housing (13) of the first plug-in device (2.1) and inside or outside the IT rack (1).

15. Arrangement according to claim 13 or 14, wherein the at least one assembly is the expansion vessel (10) which is connected to a coolant distribution channel (7) of the direct liquid cooling (DLC) via the leak-free quick coupling.

16. Arrangement according to claim 12, wherein the insert devices (2.1) are selected from: at least one coolant distribution unit (CDU), at least one coolant pump unit (RPU), preferably with 2N redundant pumps, at least one heat exchanger, at least one expansion vessel (10), at least one pressure and / or temperature sensor, at least one three-way valve with bypass valve, at least one AC power supply, at least one control unit, at least one service valve, at least one filter, preferably a filter fan, at least one automatic air vent, at least one pressure relief valve. 17- Arrangement according to one of the preceding claims, wherein a pump unit (RPU) of the direct liquid cooling (DLC) is designed as at least one of at least two insert devices (2.1) of the direct liquid cooling (DLC).

18. Arrangement according to claim 17, wherein the pump unit (RPU) forms several of the insert devices (2.1), the insert devices (2.1) formed by the pump unit (RPU) are preferably identical parts.

19. Arrangement according to claim 18, wherein the multiple plug-in devices (2.1) of the pump unit (RPU) are identical parts which are preferably redundant with respect to their pumping capacity for a direct liquid cooling (DLC) coolant, preferably connected in series.

20. Arrangement according to one of claims 17 to 19, wherein the multiple insertion devices (2.1) of the pump unit (RPU) are arranged such that, in the event of a failure of one of the multiple insertion devices (2.1) of the pump unit (RPU), the remaining insertion devices (2.1) of the pump unit (RPU) provide the required pumping power.

21. Arrangement according to one of claims 12 to 20, wherein the direct liquid cooling (DLC) assemblies designed as individual plug-in devices (2.1) have at least two similar or identical assemblies, preferably several similar or identical pump units (RPU), of which at least two of the similar or identical pump units (RPU) are preferably designed as redundant pump units (RPU).

22. Arrangement according to one of claims 12 to 21, wherein at least one of the insert devices (2.1) has a housing (13) in which at least two redundant, preferably parallel-connected, pumps (14) are arranged, wherein the housing (13) is otherwise at least free of a compressor, an expansion medium and a condenser, and preferably free of all other active components of a refrigeration machine. 23- Arrangement according to claim 22, wherein at least one heat exchanger (12) is further included in the housing (13), wherein for the component cooling of an IT infrastructure with the redundant pumps (14) coolant is conveyed or conveyable through an inner circuit (15) of the heat exchanger (12), and wherein, if the heat exchanger (12) is a liquid-liquid heat exchanger, preferably an outer circuit (17) of the liquid-liquid heat exchanger is connected or connectable to a recooler (16) for coolant.

Images