Patent Description:
With innovation and development of computing architectures of artificial intelligence, cloud computing, and big data, an amount of computing on an IT infrastructure is increasing, and requirements for computing efficiency are getting higher. To cope with these challenges, a power density of a data center is also constantly increased, and a high-density data center puts forward a higher requirement for a refrigeration device. A conventional air-cooled air conditioner is deficient in high density, and heat exchange efficiency cannot keep up with computing efficiency. Based on a high-density data center scenario, a liquid cooling system solution has better deployment advantages.

When the liquid cooling system is in use, a liquid-cooled cooling plate can be laid on a flat part of a server, such as CPU-GPU. Heat of this part is dissipated by circulating heat exchange of working medium liquid. Heat exchange is performed between an external cooling tower and the working medium liquid in the liquid-cooled cooling plate.

In a liquid cooling system in a conventional technology, cold water generated by a cooling tower of the liquid cooling system in the conventional technology is distributed to a cooling plate by using a cooling capacity distribution unit. When the cooling capacity distribution unit in the conventional technology is in use, a liquid-cooled circulating pump driver in a cabinet is a frequency converter, and the frequency converter only plays a driving role without a backup power function. If the backup power function is needed, an additional backup power system needs to be added separately. Specifically, an uninterruptible power supply (Uninterruptible Power Supply, UPS) and a battery are added, and a drive frequency converter and a backup power system of the liquid-cooled circulating pump are independent, which occupy a large space. In addition, functions of some modules in the UPS and the frequency converter are repeated, reducing system efficiency and increasing system costs. <CIT> describes a cooling system and a data center. The cooling system comprises a liquid cooling cabinet, a cooling module, and a condenser, wherein the liquid cooling cabinet is used for storing a first refrigerant, and the first refrigerant is used for absorbing heat of devices immersed in the liquid cooling cabinet to cool the devices; the cooling module is connected with the liquid cooling cabinet for storing a second refrigerant, and the second refrigerant is used for absorbing heat of the first refrigerant to enable the first refrigerant to be cooled; and the condenser is connected with the cooling module for enabling the second refrigerant to release heat and be condensed. <CIT> describes a method of fabricating a cooling unit is provided to facilitate cooling coolant passing through a coolant loop. The cooling unit includes one or more heat rejection units and an elevated coolant tank. The heat rejection unit(s) rejects heat from coolant passing through the coolant loop to air passing across the heat rejection unit. The heat rejection unit(s) includes one or more heat exchange assemblies coupled to the coolant loop for at least a portion of coolant to pass through the one or more heat exchange assemblies. The elevated coolant tank, which is elevated above at least a portion of the coolant loop, is coupled in fluid communication with the one or more heat exchange assemblies of the heat rejection unit(s), and facilitates return of coolant to the coolant loop at a substantially constant pressure.

This application provides a cooling capacity distribution unit and a liquid cooling system, to simplify a structure of the cooling capacity distribution unit and improve a water supply effect.

According to a first aspect, this application provides a cooling capacity distribution unit, where the cooling capacity distribution unit is configured to distribute a cooling capacity in a liquid cooling system. The cooling capacity distribution unit includes a cabinet, and the cabinet serves as a bearing structure and is configured to bear another component. The cooling capacity distribution unit further includes a liquid-cooled circulating pump disposed in the cabinet, and a frequency converter that supplies power to the liquid-cooled circulating pump. The frequency converter includes an AC-DC module and a DC-AC module. The AC-DC module is configured to be connected to mains, and the DC-AC module is connected to the liquid-cooled circulating pump. The cooling capacity distribution unit further includes a power supply unit, where the power supply unit includes a backup battery disposed in the cabinet, and a DC-DC module connected to the backup battery. The DC-DC module is connected to the DC-AC module and is configured to supply power to the liquid-cooled circulating pump. By using the disposed DC-DC module and the backup battery disposed in the cabinet, the cooling capacity distribution unit can provide its own power supply and a self-contained power function, to eliminate a UPS and its backup power outside the cooling capacity distribution unit, and reduce costs and an occupied space. The self-contained power is added with an interface on the basis of a driver to avoid low efficiency of multi-level conversion.

In an optional implementation, the frequency converter includes a housing, and the DC-DC module is disposed in the frequency converter. A battery bridge arm interface is disposed in the housing, and the DC-DC module is connected to the backup battery by using the battery bridge arm interface. Safety of the DC-DC module is improved.

In an optional implementation, the cooling capacity distribution unit further includes a controller. The controller is connected to the frequency converter and is configured to control the liquid-cooled circulating pump to operate. The controller can control operation of the liquid-cooled circulating pump.

In an optional implementation, the controller is further configured to detect a flow rate and a flow velocity of the liquid-cooled circulating pump. It is convenient to distribute water.

In an optional implementation, the power supply unit, the frequency converter, and the controller are arranged from bottom to top along a height direction of the cabinet. It is convenient for equipment maintenance and device replacement.

In an optional implementation, the cooling capacity distribution unit further includes a pipe layer, the pipe layer is connected to the liquid-cooled circulating pump, and the pipe layer is disposed between the backup battery and the liquid-cooled circulating pump. Space in the cabinet is properly used.

In an optional implementation, the cooling capacity distribution unit further includes a shock absorber. The liquid-cooled circulating pump is connected to the cabinet by using the shock absorber. Impact of the liquid-cooled circulating pump on the cabinet when the liquid-cooled circulating pump operates is reduced.

In an optional implementation, the liquid-cooled circulating pump is a vertical pump or a horizontal pump. Water supply is realized by using different liquid-cooled circulating pumps.

According to a second aspect, a liquid cooling system is provided. The liquid cooling system is configured to cool a computer room. The liquid cooling system includes a refrigeration system and the cooling capacity distribution unit described above and connected to the refrigeration system. By using a disposed DC-DC module and a backup battery disposed in a cabinet, the cooling capacity distribution unit can provide its own power supply and a self-contained power function, to eliminate a UPS and its backup power outside the cooling capacity distribution unit, and reduce costs and an occupied space. The self-contained power is added with an interface on the basis of a driver to avoid low efficiency of multi-level conversion.

In an optional implementation, the refrigeration system includes a cooling tower and a plate heat exchanger connected to the cooling tower. The plate heat exchanger is connected to the cooling capacity distribution unit. Heat exchange is performed by using the plate heat exchanger to implement one-level heat exchange, and another plate heat exchanger does not need to be disposed in the cooling capacity distribution unit, simplifying a structure of the cooling capacity distribution unit.

In an optional implementation, the refrigeration system further includes a constant pressure water replenishment device, and the constant pressure water replenishment device is configured to replenish water and pressure to the cooling capacity distribution unit. Reliability of the refrigeration system is ensured.

In an optional implementation, the constant pressure water replenishment device includes a water replenishment tank and a surge tank connected to the water replenishment tank, and the water replenishment tank is connected to the liquid cooling distribution unit. Water replenishment and pressure stabilization of the liquid cooling system are realized by using the water replenishment tank and the surge tank.

In an optional implementation, the constant pressure water replenishment device is disposed in an equipment room on a side of the computer room. The constant pressure water replenishment device is disposed separately in the equipment room for easy maintenance and reduction of an occupied space in the computer room.

First, an application scenario of a cooling capacity distribution unit according to an embodiment of this application is described. The cooling capacity distribution unit used in embodiment of this application is applied to a liquid cooling system, and the liquid cooling system is configured to cool a computer room. The liquid cooling system includes a cooling tower configured to cool high-temperature liquid, a cooling plate configured to exchange heat for a chip in a server in the computer room, and a cooling capacity distribution unit configured to connect the cooling tower and the cooling plate. Cold water generated by the cooling tower is distributed to the cooling plate through the cooling capacity distribution unit. When a cooling capacity distribution unit in a conventional technology is in use, a liquid-cooled circulating pump driver in a cabinet is a frequency converter <NUM>, and the frequency converter <NUM> only performs a driving function without a backup power function. As shown in <FIG>, if the backup power function is needed, an additional backup power system <NUM> needs to be added independently. Specifically, an uninterruptible power supply (Uninterruptible Power Supply, UPS) and a battery are added as is know from document <CIT>, and a drive frequency converter <NUM> and a backup power system <NUM> of a liquid-cooled circulating pump <NUM> are independent, and an occupied space is relatively large. In addition, the UPS includes an AC-DC module (AC: Alternating current, alternating current; DC: Direct current, direct current; AC-DC conversion is to convert alternating current to direct current) and a DC-AC module (DC: Direct current, direct current; AC: Alternating current, alternating current; DC-AC conversion is to convert direct current to alternating current), functions of which are the same as those of an AC-DC module and a DC-AC module in the frequency converter <NUM>, reducing system efficiency and increasing system costs. Therefore, an embodiment of this application provides a new cooling capacity distribution unit. The following describes the cooling capacity distribution unit in detail with reference to specific accompanying drawings and embodiments.

<FIG> is a schematic diagram of a structure of a cooling capacity distribution unit according to an embodiment of this application. The cooling capacity distribution unit includes a cabinet <NUM>. The cabinet <NUM> is configured to bear functional devices of the cooling capacity distribution unit. For example, the functional devices may include a frequency converter <NUM>, a power supply unit <NUM>, a controller <NUM>, and a power module. The power module may include a liquid-cooled circulating pump <NUM>. The liquid-cooled circulating pump <NUM> is configured to drive a liquid flow in a water pipe assembly <NUM>. In an optional solution, the power module may further include the water pipe assembly <NUM> connected to the liquid-cooled circulating pump <NUM>. The water pipe assembly <NUM> is configured to connect to an external cooling tower and a cooling plate in a server. The frequency converter <NUM> and the power supply unit <NUM> are configured to supply power to the liquid-cooled circulating pump <NUM>. The controller <NUM> is connected to the frequency converter <NUM> and is configured to control the liquid-cooled circulating pump <NUM> to operate. It should be understood that the functional devices in the cooling capacity distribution unit according to this embodiment of this application may include all functional devices in the foregoing example, or may include only some of the functional devices. A functional device in the cabinet <NUM> may be determined based on an actual situation. In an optional implementation, the functional devices may include only the frequency converter <NUM>, the power supply unit <NUM>, and the power module (the power module includes only the liquid-cooled circulating pump <NUM>). The pipe layer and the controller <NUM> are disposed in the cabinet <NUM> as optional accessories, or the pipe layer and the controller <NUM> are disposed outside the cabinet <NUM>.

When the foregoing functional devices are fixed in the cabinet <NUM>, a bearing bracket may be disposed in the cabinet <NUM>, and each functional device is fixedly connected to the bearing bracket by using a threaded connector (a bolt or a screw), or is fixed in the cabinet <NUM> through riveting and clamping. In an optional solution, the foregoing functional devices may alternatively be directly fixedly connected to a sidewall, a bottom wall, or a top wall of the cabinet <NUM> by using a threaded connector. A specific fixing manner is not specifically limited in this application.

<FIG> is a schematic diagram in which the liquid-cooled circulating pump <NUM> is connected to the frequency converter <NUM> and the power supply unit <NUM>. The frequency converter <NUM> according to this embodiment of this application is configured to supply power to the liquid-cooled circulating pump <NUM>. The frequency converter <NUM> mainly includes two power modules: an AC-DC module <NUM> and a DC-AC module <NUM>. The AC-DC module <NUM> is configured to connect to mains, and the DC-AC module <NUM> is connected to the liquid-cooled circulating pump <NUM>. The AC-DC module <NUM> converts mains (alternating current) into direct current, and then the DC-AC module <NUM> converts the direct current into alternating current that is applicable to the liquid-cooled circulating pump <NUM>. The frequency converter <NUM> further includes a housing <NUM>, and the AC-DC module <NUM> and the DC-AC module <NUM> are fixed in the housing <NUM>. Ports that match the two modules are disposed on the housing <NUM>, so that an external cable is electrically connected to the AC-DC module <NUM> and the DC-AC module <NUM> in the housing <NUM>.

The cooling capacity distribution unit according to this application provides a backup power supply of the liquid-cooled circulating pump <NUM> by using the disposed power supply unit <NUM>. The power supply unit <NUM> may specifically include a DC-DC module <NUM> and a backup battery <NUM>. The DC-DC module <NUM> is an apparatus for converting electric energy of one voltage value into electric energy of another voltage value in a direct current circuit. As shown in <FIG>, the DC-DC module <NUM> is connected to the DC-AC module <NUM> and is configured to supply power to the liquid-cooled circulating pump <NUM>. Direct current provided by the backup battery <NUM> may be converted, by using the DC-DC module <NUM>, into electric energy that matches the DC-AC module <NUM>, and then the electric energy provided by the backup battery <NUM> is converted, by using the DC-AC module <NUM>, into alternating current that matches the liquid-cooled circulating pump <NUM>. As can be learned from the structure shown in <FIG>, in a circuit system, the AC-DC module <NUM> in the frequency converter <NUM> is connected in parallel to the DC-DC module <NUM> in the power supply unit <NUM> and then connected to the DC-AC module <NUM> of the frequency converter <NUM>, so that the DC-AC module <NUM> can selectively supply power to the liquid-cooled circulating pump <NUM> by using electric energy of mains converted by the AC-DC module <NUM>, or selectively supply power to the liquid-cooled circulating pump <NUM> by using electric energy of the backup battery <NUM> converted by the DC-DC module <NUM>. An effect of providing a backup power supply to the liquid-cooled circulating pump <NUM> by the cooling capacity distribution unit is implemented.

It can be learned from the foregoing structure that the cooling capacity distribution unit according to this application has its own backup power supply through the disposed power supply unit <NUM>, and the backup power supply is the DC-DC module <NUM> and the backup battery <NUM>. Compared with the power supply structure of the liquid-cooled circulating pump <NUM> shown in <FIG>, the cooling capacity distribution unit in this application eliminates a UPS and its backup power outside the cooling capacity distribution unit in the conventional technology, reducing costs and an occupied space. In addition, the power supply unit <NUM> according to this application is directly added with an interface (an interface connected between the DC-AC module <NUM> and the DC-DC module <NUM>) on the basis of the frequency converter <NUM>, to avoid low efficiency caused by multi-level conversion, reducing a power loss.

In an optional solution, when the AC-DC module <NUM> and the DC-AC module <NUM> of the frequency converter <NUM> are disposed in the housing <NUM>, the DC-DC module <NUM> of the power supply unit <NUM> is disposed in the frequency converter <NUM>, to be specific, is disposed in the housing <NUM> of the frequency converter <NUM>. Correspondingly, a battery bridge arm interface is disposed in the housing <NUM>, and the DC-DC module <NUM> is connected to the backup battery <NUM> by using the battery bridge arm interface. In the foregoing structure, the DC-DC module <NUM> is integrated into the housing <NUM> of the frequency converter <NUM>, improving safety of the DC-DC module <NUM>. When the DC-DC module <NUM> is disposed in the housing <NUM> of the frequency converter <NUM>, the AC-DC module <NUM>, the DC-AC module <NUM>, and the DC-DC module <NUM> form a driver of the liquid-cooled circulating pump <NUM>. The driver drives the liquid-cooled circulating pump <NUM> to operate.

In an optional solution, the backup battery <NUM> may also be disposed in the housing <NUM> of the frequency converter <NUM>, to protect the AC-DC module <NUM>, the DC-AC module <NUM>, the DC-DC module <NUM>, and the backup battery <NUM> described above by using the housing <NUM>.

For the backup battery <NUM> according to this application, different types of batteries may be selected as the backup battery <NUM> of the liquid-cooled circulating pump <NUM>, and the backup battery <NUM> may be an acid (lead acid) or alkaline (cadmium nickel) storage battery. For example, the backup battery <NUM> in this application uses a lithium battery.

<FIG> is a specific structure of a cooling capacity distribution unit according to this application. In the structure shown in <FIG>, the cooling capacity distribution unit includes a cabinet <NUM>, a frequency converter <NUM>, a power supply unit, a controller <NUM>, and a power module. Along a height direction of the cabinet <NUM>, the power module, the power supply unit, the frequency converter <NUM>, and the controller <NUM> are arranged from bottom to top along a height direction of the cabinet <NUM>.

In an optional solution, the power module includes a shock absorber <NUM> in addition to a liquid-cooled circulating pump <NUM> and a water pipe assembly <NUM>. The liquid-cooled circulating pump <NUM> is connected to the cabinet <NUM> by using the shock absorber <NUM>. As shown in <FIG>, the shock absorber <NUM> is fixed to a bottom plate of the cabinet <NUM>, and the liquid-cooled circulating pump <NUM> is fixed to the shock absorber <NUM>. The shock absorber <NUM> can reduce impact of vibration of the liquid-cooled circulating pump <NUM> on the cabinet <NUM> during operation, and further alleviate a reliability problem of another functional device connected to the cabinet <NUM> due to resonance.

In an optional solution, pump bodies of different models may be selected for the liquid-cooled circulating pump <NUM>. For example, the liquid-cooled circulating pump <NUM> is a vertical pump or a horizontal pump. To be specific, liquid-cooled circulating pumps <NUM> of different models can be used to provide liquid flow power. A size of the liquid-cooled circulating pump <NUM> is not specifically limited in this application, provided that the liquid-cooled circulating pump <NUM> can be disposed in the cabinet <NUM>.

Still referring to <FIG>, there is a pipe layer with a specific space above the liquid-cooled circulating pump <NUM>. The pipe layer is used to dispose the water pipe assembly <NUM> in the power module. The water pipe assembly <NUM> may include a water pipe and a valve accessory. Specific structures of the water pipe and the valve accessory are not specifically limited in this application, provided that the liquid-cooled circulating pump <NUM> can be connected to a cooling tower and a cooling plate.

When the foregoing functional devices are specifically disposed, the cabinet <NUM> shown in <FIG> is a rectangular cabinet <NUM>. For example, the cabinet <NUM> is a rectangular cabinet <NUM> with a height of <NUM> and a width of <NUM>. A space in the cabinet <NUM> is divided into a plurality of spaces along the height, and each space is used to bear a different functional device. For example, along the height direction, the space in the cabinet <NUM> is divided into a first accommodation space, a second accommodation space, a third accommodation space, and a fourth accommodation space. The first accommodation space with a height of <NUM> is used to accommodate the liquid-cooled circulating pump <NUM> and the shock absorber <NUM> in the power module, where the shock absorber <NUM> occupies a space with a height of <NUM>, and the liquid-cooled circulating pump <NUM> occupies a space with a height of <NUM>. The second accommodation space with a height of <NUM> is a pipe layer, and is used to accommodate the water pipe assembly <NUM> in the power module. The third accommodation space with a height of <NUM> is used to accommodate the power supply unit and the frequency converter <NUM>. When a DC-DC module in the power supply unit is disposed in the frequency converter <NUM>, the third accommodation space is divided into two parts: a space part (with a height of <NUM>) used to accommodate a backup battery <NUM> and a space part (with a height of <NUM>) used to accommodate the frequency converter <NUM> (including the DC-DC module of the power supply unit). The fourth accommodation space with a height of <NUM> is used to accommodate the controller <NUM>.

In an optional implementation, the controller <NUM> according to this embodiment of this application is further configured to detect a flow rate and a flow velocity of the liquid-cooled circulating pump <NUM>. The controller <NUM> may detect an operation state of the liquid-cooled circulating pump <NUM> by using a device that matches the liquid-cooled circulating pump <NUM> such as a flowmeter and a pitometer.

In an optional implementation, the controller <NUM> may be a common controller <NUM> such as a single-chip microcomputer, a PLC, or an industrial personal computer. In addition, a principle that the controller <NUM> controls the liquid-cooled circulating pump to operate is a simple operating principle possessed by the controller <NUM>.

It may be learned from the foregoing description that the functional devices included in the cooling capacity distribution unit according to this embodiment of this application include only several components such as the shock absorber <NUM>, the liquid-cooled circulating pump <NUM>, the water pipe assembly <NUM>, the backup battery <NUM>, the frequency converter <NUM> (including the DC-DC module), and the controller <NUM>. There are only a few functional devices in the cabinet, so that there can be more space to accommodate the liquid-cooled circulating pump <NUM> with higher power. For ease of understanding a gap between the cooling capacity distribution unit shown in <FIG> in this application and the cooling capacity distribution unit in the conventional technology, the following provides comparison between the two cooling capacity distribution units and detailed description.

First, the cooling capacity distribution unit in the conventional technology is described. In the cooling capacity distribution unit in the conventional technology, a constant pressure water replenishment device, a plate heat exchanger, a liquid-cooled circulating pump, and a matching valve accessory are disposed. One side of the plate heat exchanger is connected to a cooling tower, and the other side of the plate heat exchanger is connected to a cooling plate, to implement heat exchange between hot water in the cooling plate and cold water in the cooling tower. The constant pressure water replenishment device is configured to replenish water in an entire liquid cooling system and maintain system pressure. It may be learned from the foregoing description that there are many internal components of the cooling capacity distribution unit in the conventional technology, and the cooling capacity distribution unit in the conventional technology includes different functions such as heat exchange, maintaining stability of system water pressure, and driving a liquid flow. However, due to a limited space in a cabinet, model selection of the components is limited. For example, the plate heat exchanger and the liquid-cooled circulating pump described above are both affected by the space in the cabinet. In addition, a corresponding filter needs to be disposed for the plate heat exchanger disposed in the cabinet. However, during an earlier flushing process of the filter, some manual valves need to be opened or closed. Due to the limited space in the cabinet, operation is difficult. In addition, in the conventional technology, a primary side of the cooling capacity distribution unit is cooling water, the plate heat exchanger in the cabinet will encounter scale formation after long-term operation, and thus the plate heat exchanger needs regular maintenance. In addition, because the plate heat exchanger in the cooling capacity distribution unit is a small plate heat exchanger, a fin spacing inside the plate heat exchanger is small, and the plate heat exchanger is prone to be dirty and blocked.

However, it may be learned from the cooling capacity distribution unit according to this embodiment of this application that the cooling capacity distribution unit according to this embodiment of this application includes only several functional devices such as the shock absorber <NUM>, the liquid-cooled circulating pump <NUM>, the water pipe assembly <NUM>, the backup battery <NUM>, the frequency converter <NUM> (including the DC-DC module), and the controller <NUM>. The foregoing functional devices are all functional devices that serve to drive a liquid flow in the cooling plate. It may be understood that the cooling capacity distribution unit according to this embodiment of this application is only a device configured to drive a liquid flow on a server side (drive a liquid flow in the cooling plate) in a refrigeration system. Therefore, there is a large space in the cabinet <NUM> of the cooling capacity distribution unit according to this embodiment of this application to accommodate the liquid-cooled circulating pump <NUM>, so that a liquid-cooled circulating pump with higher power can be selected, to improve efficiency of the cooling capacity distribution unit.

Table <NUM> below shows efficiency of using different circulating liquid-cooled circulating pumps. Table <NUM> shows different cases when a vertical pump and a horizontal pump are selected for the cooling capacity distribution unit according to this application and the cooling capacity distribution unit in the conventional technology.

It may be learned from Table <NUM> that after power of the liquid-cooled circulating pump <NUM> is increased, the cooling capacity distribution unit may support <NUM> liquid cooling cabinets with a power density of <NUM> KW. Compared with the cooling capacity distribution unit in the conventional technology that can support only <NUM> liquid cooling cabinets with a power density of <NUM> KW to <NUM> KW, efficiency of the cooling capacity distribution unit is greatly improved.

It can be learned from the foregoing description that, because no plate heat exchanger is disposed in the cooling capacity distribution unit according to this embodiment of this application, maintenance and repair of a device can be reduced, and a risk of water leakage in a computer room can be reduced. In addition, power of the cooling capacity distribution unit is increased, which can support a liquid cooling cabinet with higher power under a condition of a same percentage of a space occupied by the cabinet. With continuous evolution of a high power density of a liquid cooling cabinet in the future, the cooling capacity distribution unit in this embodiment of this application occupies fewer cabinets in the computer room, which increases a quantity of cabinets that can be arranged per thousand square meters of the computer room. In addition, the cooling capacity distribution unit disclosed in this application has a self-contained power function (power supply unit), and eliminates an external UPS and its backup power, reducing costs and an occupied space. The power supply unit is added with an interface on the basis of the frequency converter <NUM> to avoid low efficiency of multi-level conversion.

<FIG> shows a liquid cooling system according to an embodiment of this application. The liquid cooling system is configured to cool a computer room <NUM>. The liquid cooling system includes a refrigeration system and the cooling capacity distribution unit <NUM> described above and connected to the refrigeration system. The refrigeration system is configured to generate cold water for heat exchange with a cooling plate. The refrigeration system includes a cooling tower <NUM> and a plate heat exchanger <NUM> connected to the cooling tower <NUM>. The cooling tower <NUM> and the plate heat exchanger <NUM> may be connected by using a pipeline, and the pipeline may use an existing pipeline. In addition, a pump for driving water to flow is disposed on the pipeline, and a disposing position of the pump is not specifically limited in this application. As shown in <FIG>, the plate heat exchanger <NUM> is connected to the cooling capacity distribution unit <NUM> by using the pipeline. Heat exchange is performed on liquid in the cooling plate in the computer room <NUM> directly in the plate heat exchanger <NUM> to implement one-level heat exchange, and another plate heat exchanger <NUM> does not need to be disposed in the cooling capacity distribution unit <NUM>, simplifying a structure of the cooling capacity distribution unit <NUM>.

In an optional solution, the refrigeration system further includes a constant pressure water replenishment device <NUM>, and the constant pressure water replenishment device <NUM> is configured to replenish water and pressure to the cooling capacity distribution unit <NUM>. In a specific implementation shown in <FIG>, the constant pressure water replenishment device <NUM> includes a water replenishment tank <NUM> and a surge tank <NUM> connected to the water replenishment tank <NUM>, and the water replenishment tank <NUM> is connected to the liquid cooling distribution unit. The constant pressure water replenishment device <NUM> may be disposed in an equipment room on a side of the computer room <NUM>. The constant pressure water replenishment device <NUM> is disposed separately in the equipment room for easy maintenance and reduction of an occupied space in the computer room <NUM>.

It can be learned from the foregoing description that, in the present invention, an overall solution of a liquid cooling system is optimized, and a component that is not related to cooling capacity distribution of the system, such as the plate heat exchanger <NUM> and the constant pressure water replenishment device <NUM>, is removed from the cabinet and the computer room <NUM>, and is placed in the equipment room near the computer room <NUM>. The plate heat exchanger <NUM> and the constant pressure water replenishment device <NUM> are configured with the computer room <NUM> as a unit of model selection. A backup of the computer room <NUM> is set. As a selected model increases and a disposing position changes (the equipment room), an open cooling tower <NUM> may be configured at a front end of the plate heat exchanger. Only one constant pressure water replenishment device needs to be configured in the system.

The cooling capacity distribution unit <NUM> in this embodiment of this application is integrated and optimized based on the overall solution, reducing a redundant waste and a system failure rate of a device, and reducing solution costs of the liquid cooling system.

A small plate heat exchanger of the existing cooling capacity distribution unit <NUM> is configured as a large plate heat exchanger of the equipment room, so that system compatibility is improved. Cooling water of a primary-side cooling tower <NUM> may directly enter the large plate heat exchanger, avoiding multi-level heat exchange and improving overall heat exchange efficiency of the system. In addition, disposing the plate heat exchanger in the equipment room facilitates maintenance and repair of the device, reducing a risk of water leakage in the computer room <NUM>.

Power of the cooling capacity distribution unit <NUM> is increased, which can support a liquid cooling cabinet with higher power under a condition of a same percentage of a space occupied by the cabinet. With continuous evolution of a high power density of a liquid cooling cabinet in the future, a new cooling capacity distribution unit <NUM> occupies fewer cabinets in the computer room <NUM>, which increases a quantity of cabinets that can be arranged per thousand square meters of the computer room <NUM>.

The cooling capacity distribution unit according to this embodiment of this application has a self-contained power function, to eliminate a UPS and its backup power outside the cooling capacity distribution unit, reducing costs and an occupied space. The self-contained power is added with an interface on the basis of a driver to avoid low efficiency of multi-level conversion.

Claim 1:
A cooling capacity distribution unit, comprising: a cabinet, a liquid-cooled circulating pump (<NUM>) disposed in the cabinet, and a frequency converter (<NUM>) that supplies power to the liquid-cooled circulating pump, wherein the frequency converter comprises an AC-DC module (<NUM>) and a DC-AC (<NUM>) module, the AC-DC module is connected to mains, and the DC-AC module is connected to the liquid-cooled circulating pump; and
the cooling capacity distribution unit further comprises a power supply unit (<NUM>), the power supply unit comprises a backup battery (<NUM>) disposed in the cabinet, and a DC-DC module (<NUM>) connected to the backup battery, wherein the DC-DC module is connected to the DC-AC module and is configured to supply power to the liquid-cooled circulating pump.