A plug-in frame CDU system and control method

Abstract

This invention relates to the field of heat exchange technology, and more particularly to a plug-in frame CDU system and its control method. The plug-in frame CDU system includes an outdoor heat dissipation module, a server heat exchange module, and a power auxiliary module. The outdoor heat dissipation module is used to dissipate heat and cool the heat exchange medium, while the server heat exchange module is used to allow the heat exchange medium to absorb heat from the server. The power auxiliary module includes a power component and a detection component. The input end of the power component is connected to the output end of the outdoor heat dissipation module, and the output end is connected to the input end of the server heat exchange module. The input end of the detection component is connected to the output end of the server heat exchange module, and the output end is connected to the input end of the outdoor heat dissipation module. The outdoor heat dissipation module, power component, server heat exchange module, and detection component are sequentially connected to form a loop, thereby forming a circulating heat exchange system to absorb heat from the server and release the heat to the outdoor environment. This plug-in frame CDU system can reduce energy consumption, reduce operating costs, and simplify system maintenance.

Description

Technical Field

[0001] This invention relates to the field of heat exchange technology, and in particular to a frame-inserted CDU system and its control method. Background Technology

[0002] Currently used frame-mounted CDU systems integrate heat exchangers into the system. The heat exchange medium from the server cold plate is circulated back to the heat exchanger by a circulating pump, and then the heat is exchanged to the indoor environment by a fan.

[0003] In the process of realizing this invention, the inventors discovered at least the following problems in the prior art:

[0004] Existing plug-in frame CDU systems provide a limited cooling source from the indoor environment, failing to fully utilize the outdoor cooling source. This results in higher energy consumption and operating costs. Furthermore, the integration of the heat exchanger into the plug-in frame CDU system leads to a very compact layout of system components, piping, and electrical control, making system maintenance difficult and resulting in poor maintainability in the later stages. Summary of the Invention

[0005] One object of the present invention is to provide a frame-mounted CDU system that can increase the maintainable space of the system, thereby reducing the maintenance difficulty of the system, improving the maintainability of the system, and utilizing outdoor cooling to reduce energy consumption and operating costs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An interlocking CDU system, the interlocking CDU system comprising at least:

[0008] An outdoor heat dissipation module is installed outdoors and is used to utilize the outdoor cooling capacity to dissipate heat and cool the heat exchange medium.

[0009] Server heat exchange module, the server heat exchange module is used to allow the heat exchange medium to absorb heat from the server;

[0010] A power auxiliary module, comprising at least a power component and a detection component, wherein the power component provides flow power to the heat exchange medium, the input end of the power component is connected to the output end of the outdoor heat dissipation module, the output end of the power component is connected to the input end of the server heat exchange module, the input end of the detection component is connected to the output end of the server heat exchange module, and the output end of the detection component is connected to the input end of the outdoor heat dissipation module.

[0011] As a preferred embodiment of a frame-mounted CDU system, the outdoor heat dissipation module includes at least a first branch and a second branch connected in parallel, and the input terminals of the first branch and the second branch are both connected to the output terminal of the detection component;

[0012] The outdoor heat dissipation module also includes a medium collection pipeline, the output ends of the first branch and the second branch are both connected to the input end of the medium collection pipeline, and the output end of the medium collection pipeline is connected to the input end of the power component;

[0013] The outdoor heat dissipation module also includes a heat exchanger, which is installed on the first branch and is also installed outdoors. A fan is installed on one side of the heat exchanger to blow air onto the heat exchanger.

[0014] As a preferred embodiment of a frame-mounted CDU system, the outdoor heat dissipation module further includes a flow control device, which is disposed on the second branch.

[0015] As a preferred embodiment of a frame-type CDU system, the power auxiliary module further includes an automatic liquid injection component, which is used to inject the heat exchange medium into the frame-type CDU system, and the output end of the automatic liquid injection component is connected to the power component.

[0016] As a preferred embodiment of a CDU system, the automatic liquid injection assembly includes at least a liquid injection line, a liquid injection tank, and a liquid injection pump. The liquid injection tank is connected to the input end of the liquid injection line, the output end of the liquid injection line is connected to the power assembly, and the liquid injection pump is located on the liquid injection line.

[0017] As a preferred embodiment of a frame-type CDU system, the automatic liquid injection assembly further includes a liquid level sensor for measuring the liquid level in the injection tank.

[0018] As a preferred embodiment of a CDU system, the power assembly includes a third branch and a fourth branch, and further includes a first medium temperature sensor, a first pressure sensor, two circulation pumps, and two flow direction control devices. One of the circulation pumps and one of the flow direction control devices are located on the third branch, and the other circulation pump and the other flow direction control device are located on the fourth branch. The first medium temperature sensor and the first pressure sensor are both located on the downstream connecting pipes of the third branch and the fourth branch.

[0019] As a preferred embodiment of a plug-in CDU system, the power assembly further includes an expansion tank, which is disposed on the upstream junction pipe of the third branch and the fourth branch;

[0020] The power assembly also includes a drain pipe, one end of which is connected to the upstream confluence pipe of the third branch and the fourth branch, and a drain device is provided on the drain pipe;

[0021] The power assembly also includes a pressure relief device, which is installed on the downstream connecting pipeline of the third branch and the fourth branch.

[0022] As a preferred embodiment of a frame-mounted CDU system, the detection component includes a detection pipeline and a flow sensor, a second medium temperature sensor, and a second pressure sensor disposed on the detection pipeline.

[0023] As a preferred embodiment of a rack-mounted CDU system, the power assist module further includes a temperature and humidity sensor. The power assist module is installed inside the rack of the server rack, and the temperature and humidity sensor is used to measure the temperature and humidity at the rack.

[0024] As a preferred embodiment of a frame-mounted CDU system, the frame-mounted CDU system further includes a third pressure sensor, which is disposed on a pipe connecting the input end of the power component and the output end of the outdoor heat dissipation module;

[0025] The insert-frame CDU system also includes a fifth cut-off device and a sixth cut-off device, both of which are installed on the pipeline connecting the input end of the power component and the output end of the outdoor heat dissipation module.

[0026] As a preferred embodiment of a frame-mounted CDU system, the frame-mounted CDU system further includes a filter module for filtering the heat exchange medium. The input end of the filter module is connected to the output end of the detection component, and the output end of the filter module is connected to the input end of the outdoor heat dissipation module.

[0027] As a preferred embodiment of a frame-mounted CDU system, the filtering module includes at least a fifth branch and a sixth branch connected in parallel. The fifth branch is provided with a first cutoff device, a filter, and a second cutoff device in sequence, and the sixth branch is provided with a third cutoff device.

[0028] As a preferred embodiment of a frame-mounted CDU system, a fourth pressure sensor is installed on the upstream connecting pipe of the fifth branch and the sixth branch, and a fifth pressure sensor is installed on the downstream connecting pipe of the fifth branch and the sixth branch.

[0029] The filtering module further includes a fourth shut-off device, which is disposed on the downstream converging pipeline of the fifth branch and the sixth branch.

[0030] Another objective of this invention is to provide a control method that can further reduce the energy consumption of the aforementioned intercalation frame CDU system and reduce operating costs.

[0031] To achieve this objective, the present invention adopts the following technical solution:

[0032] A control method, applied to the above-mentioned intercalation frame CDU system, the control method comprising the following steps:

[0033] First, conduct experiments or calculations to obtain the preset flow rate L0 of the heat exchange medium required by the server and the preset temperature T0 at the output end of the power component under different ambient temperatures.

[0034] The real-time ambient dew point temperature T2 at the insertion frame and the real-time server temperature are obtained, and the corresponding values ​​of the preset flow rate L0 and the preset temperature T0 are determined.

[0035] Determine whether the server's real-time cooling requirement is greater than the preset cooling rate; if so, turn on the fan and circulation pump.

[0036] Measure the real-time temperature T1 of the heat exchange medium at the output end of the power component, and determine whether T1 < T2 + k, where k is a positive number. If yes, enter the priority anti-condensation mode; otherwise, enter the cooling mode.

[0037] Priority anti-condensation mode: The operating power of the fan, the operating power of the circulating pump, and the opening of the electrically controlled flow valve are adjusted by PID until T1≥T2+k is met, and then the cooling mode is entered.

[0038] Cooling mode: The operating power of the fan, the operating power of the circulating pump, and the opening of the electrically controlled flow valve are adjusted by PID until T1≤T0 and the real-time flow rate of the heat exchange medium L1≥L0 is satisfied.

[0039] The beneficial effects of this invention are:

[0040] This invention provides a frame-mounted CPU cooler system, including an outdoor heat dissipation module, a server heat exchange module, and a power auxiliary module. The outdoor heat dissipation module is used to dissipate heat and cool the heat exchange medium; by being located outdoors, it can fully utilize the outdoor cooling capacity. The server heat exchange module is used to allow the heat exchange medium to absorb heat from the server. The power auxiliary module includes a power component and a detection component. The power component provides flow power to the heat exchange medium within the frame-mounted CPU system. The input end of the power component is connected to the output end of the outdoor heat dissipation module, and the output end of the power component is connected to the input end of the server heat exchange module. The input end of the detection component is connected to the output end of the server heat exchange module, and the output end of the detection component is connected to the input end of the outdoor heat dissipation module. Thus, the outdoor heat dissipation module, power component, server heat exchange module, and detection component are sequentially connected to form a loop, creating a circulating heat exchange system to absorb heat from the server and release it to the outdoor environment. Compared to existing technologies that utilize limited indoor cooling capacity and require increased flow rates to ensure server cooling, leading to high system energy consumption and operating costs, the rack-mounted CDU system provided by this invention can fully utilize outdoor cooling capacity. While achieving the same server cooling effect, it can reduce flow rates, thereby lowering energy consumption and operating costs. Furthermore, by placing the heat dissipation module of the rack-mounted CDU system outdoors, this invention increases the system's maintainable space, reduces maintenance difficulty, and enhances system maintainability.

[0041] This invention also provides a control method applied to the aforementioned insert-frame CDU system. The control method includes the following steps: first, conducting experiments or calculations to obtain a preset flow rate L0 of the heat exchange medium required by the server under different ambient temperatures and a preset temperature T0 at the output end of the power unit; obtaining the real-time ambient dew point temperature T2 at the insert frame and the real-time server temperature, and determining the corresponding values ​​of the preset flow rate L0 and the preset temperature T0; determining whether the real-time cooling required by the server is greater than the preset cooling range, and if so, starting the fan and circulating pump; measuring the power unit... The real-time temperature T1 of the heat exchange medium at the output end of the component is used to determine whether T1 < T2 + k, where k is a positive number. If yes, the system enters the priority anti-condensation mode; otherwise, it enters the cooling mode. In the priority anti-condensation mode, the operating power of the fan, the operating power of the circulating pump, and the opening of the electrically controlled flow valve are adjusted using PID control until T1 ≥ T2 + k, at which point the system enters the cooling mode. In the cooling mode, the operating power of the fan, the operating power of the circulating pump, and the opening of the electrically controlled flow valve are adjusted using PID control until T1 ≤ T0, and the real-time flow rate L1 of the heat exchange medium ≥ L0. Using this control method, the plug-in frame CDU system can achieve automatic system regulation, ensuring rapid cooling when the server requires a large temperature reduction, and slowing down the cooling rate to approach the target temperature when the server requires a smaller temperature reduction. This reduces the energy consumption and operating costs of the plug-in frame CDU system while meeting the server's cooling requirements. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of the insert frame CDU system provided in an embodiment of the present invention;

[0043] Figure 2 This is a flowchart illustrating the control method provided in an embodiment of the present invention.

[0044] In the picture:

[0045] 1. Outdoor heat dissipation module; 101. First branch; 102. Second branch; 11. Fan; 12. Heat exchanger; 13. Flow control device;

[0046] 2. Server heat exchange module;

[0047] 3. Power auxiliary module; 31. Automatic liquid injection assembly; 311. Liquid injection pipeline; 312. Liquid injection tank; 313. Liquid injection pump;

[0048] 32. Power assembly; 321. Circulating pump; 322. First medium temperature sensor; 323. First pressure sensor; 324. Expansion tank; 325. Drainage device; 326. Pressure relief device; 327. Flow direction control device;

[0049] 33. Detection component; 331. Flow sensor; 332. Second medium temperature sensor; 333. Second pressure sensor;

[0050] 34. Temperature and humidity sensor;

[0051] 4. Filter module; 41. Filter; 42. First shut-off device; 43. Second shut-off device; 44. Third shut-off device; 45. Fourth shut-off device; 46. Fifth pressure sensor; 47. Fourth pressure sensor;

[0052] 5. Third pressure sensor; 6. Exhaust device; 7. Fifth shut-off device; 8. Sixth shut-off device. Detailed Implementation

[0053] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings, not all of them.

[0054] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] The currently used plug-in frame CDU system provides the CDU cooling source through the indoor environment. The indoor environment has limited conditions and can only provide limited cooling capacity. It cannot make full use of the outdoor cooling source, resulting in high energy consumption and high operating costs. Furthermore, the heat exchanger is integrated into the plug-in frame CDU system, which leads to a very compact layout of system components, piping and electrical control, making system maintenance difficult and resulting in poor maintainability in the later stages.

[0057] Therefore, this embodiment provides an insert-frame CDU system to solve the above problems.

[0058] like Figure 1 As shown, the frame-mounted CDU system includes at least an outdoor heat dissipation module 1, a server heat exchange module 2, and a power auxiliary module 3. The outdoor heat dissipation module 1 is used to dissipate heat and cool the heat exchange medium, and is located outdoors, meaning it can fully utilize the outdoor cooling capacity. The server heat exchange module 2 is used to allow the heat exchange medium to absorb heat from the server. The power auxiliary module 3 includes at least a power component 32 and a detection component 33. The power component 32 provides flow power to the heat exchange medium (i.e., the heat exchange medium within the frame-mounted CDU system). The input of the power component 32 is connected to the output of the outdoor heat dissipation module 1, and the output of the power component 32 is connected to the input of the server heat exchange module 2. The input of the detection component 33 is connected to the output of the server heat exchange module 2, and the output of the detection component 33 is connected to the input of the outdoor heat dissipation module 1. In other words, the outdoor heat dissipation module 1, power component 32, server heat exchange module 2, and detection component 33 are sequentially connected to form a circulating heat exchange system to absorb heat from the server and release it to the outdoor environment. Since existing technologies utilize limited indoor cooling capacity, increasing the flow rate is necessary to ensure the server's cooling effect, resulting in high system energy consumption and operating costs. However, the frame-mounted CDU system provided in this embodiment can fully utilize outdoor cooling capacity. While ensuring the same server cooling effect, it can reduce the flow rate and energy consumption, thereby saving energy and reducing operating costs. Furthermore, the frame-mounted CDU system provided in this embodiment places its heat dissipation module outdoors; that is, the heat dissipation module is not integrated within the frame-mounted CDU system. The heat dissipation module does not occupy the installation space of the frame-mounted CDU system, increasing the system's maintainable space and reducing maintenance difficulty, resulting in high system maintainability.

[0059] It should be noted that the server heat exchange module 2 is installed in the server rack. The server heat exchange module 2 includes at least several cold plates connected in parallel. Each cold plate is installed in a server in the server rack. The input end of each cold plate is connected to the output end of the power component 32, and the output end of each cold plate is connected to the input end of the detection component 33. When the low-temperature heat exchange medium output by the power component 32 passes through the cold plate, the low-temperature heat exchange medium will absorb the heat of the server, thereby cooling the server. Thus, the server heat exchange module 2 can be used to make the heat exchange medium absorb the heat of the server.

[0060] Preferably, the outdoor heat dissipation module 1 includes at least a first branch 101 and a second branch 102 connected in parallel, with the input ends of both the first branch 101 and the second branch 102 connected to the output end of the detection component 33. The outdoor heat dissipation module 1 also includes a medium collection pipeline, with the output ends of both the first branch 101 and the second branch 102 connected to the input end of the medium collection pipeline, and the output end of the medium collection pipeline connected to the input end of the power component 32. The outdoor heat dissipation module 1 also includes a heat exchanger 12, which is disposed on the first branch 101 and is located outdoors. A fan 11 is disposed on one side of the heat exchanger 12, and the fan 11 is used to blow air onto the heat exchanger 12. That is, the fan 11 can blow air towards the heat exchanger 12, so that the heat of the heat exchanger 12 can be dissipated to the outdoor environment more quickly, thereby improving the heat exchange efficiency of the heat exchanger 12. Among them, the heat exchanger 12 can be a dry cooler. With the cooperation of the fan 11, the high-temperature heat exchange medium sent by the detection component 33 is cooled into a low-temperature heat exchange medium. The fan 11 is preferably a variable frequency fan, so that the fan speed can be adjusted according to the load.

[0061] Since the heat exchanger 12 is located outdoors, it can fully utilize the ample cooling capacity of the outdoor environment. Therefore, the flow rate of the heat exchange medium within the heat exchanger 12 can be reduced, thereby decreasing the pressure loss caused by the heat exchange medium flowing through the heat exchanger 12. This, in turn, reduces the operating power of the circulating pump 321, resulting in lower system energy consumption and reduced operating costs. Preferably, the outdoor heat dissipation module 1 also includes a flow control device 13, which is located on the second branch 102. It is understood that by adjusting the flow control device 13, the ratio of the heat exchange medium flowing through the first branch 101 and the second branch 102 can be adjusted to meet the system's liquid supply temperature requirements. Specifically, the flow control device 13 can be an electrically controlled flow valve, such as an electric two-way valve.

[0062] Preferably, the insert-frame CDU system also includes a PID controller, which is electrically connected to the fan 11, the flow control device 13 and the circulating pump 321, so that the PID controller can regulate the operating power of the fan 11 and the circulating pump 321 and the opening degree of the flow control device 13. The circulating pump 321 will be described in detail below.

[0063] Preferably, the power auxiliary module (3) further includes an automatic liquid injection component 31, which can be used to inject the heat exchange medium into the insert frame CDU system, and the output end of the automatic liquid injection component 31 is connected to the power component 32.

[0064] To achieve automatic liquid injection, preferably, the automatic liquid injection assembly 31 includes at least an injection pipeline 311, an injection tank 312, and an injection pump 313. The injection tank 312 is connected to the input end of the injection pipeline 311, the output end of the injection pipeline 311 is connected to the power assembly 32, and the injection pump 313 is mounted on the injection pipeline 311. It should be noted that the connection between the output end of the injection pipeline 311 and the power assembly 32 can be such that the output end of the injection pipeline 311 is connected to the input end of the power assembly 32. (Refer to...) Figure 1 As shown; of course, in some other embodiments, the output end of the injection line 311 may also be connected to the rest of the power assembly 32, which will not be elaborated or limited here.

[0065] Preferably, the insert-frame CDU system further includes a third pressure sensor 5, which is installed on the pipeline connecting the input end of the power component 32 and the output end of the outdoor heat dissipation module 1. Both the third pressure sensor 5 and the injection pump 313 are connected to a PID controller. The PID controller determines whether injection is needed based on the real-time pressure value of the heat exchange medium measured by the third pressure sensor 5. When the real-time pressure value is lower than the preset injection pressure, the injection pump 313 starts to inject the heat exchange medium into the insert-frame CDU system, thereby achieving automatic liquid replenishment without manual supervision or operation, enhancing safety, and reducing maintenance costs.

[0066] To prevent the injection tank 312 from being empty, the automatic injection assembly 31 preferably also includes a level sensor for measuring the liquid level inside the injection tank 312. A visible area is also provided on the wall of the injection tank 312 to facilitate observation of the liquid level by personnel. A quick-connect fitting is provided between the injection tank 312 and the injection pipeline 311 for easy installation and disassembly.

[0067] Preferably, the power assembly 32 includes at least a circulating pump 321, a first medium temperature sensor 322, and a first pressure sensor 323, with the first medium temperature sensor 322 and the first pressure sensor 323 both located downstream of the circulating pump 321. The PID controller is electrically connected to the circulating pump 321, the first medium temperature sensor 322, and the first pressure sensor 323, enabling the PID controller to obtain the temperature and pressure of the heat exchange medium at the output end of the power assembly 32. This allows the PID controller to obtain the temperature and pressure of the heat exchange medium at the input end of the server heat exchange module 2, and the PID controller can adjust the operating power of the fan 11 and the circulating pump 321, as well as the opening degree of the flow control device 13, based on this temperature.

[0068] To prevent system failure due to damage to the circulating pump 321, preferably, the power assembly 32 also includes a third branch and a fourth branch connected in parallel. The upstream connecting pipe of the third and fourth branches is connected to the output end of the medium connecting pipe, and the downstream connecting pipe of the third and fourth branches is connected to the input end of the server heat exchange module 2. Each of the third and fourth branches is equipped with a circulating pump 321 and a flow direction control device 327. The downstream connecting pipe of the third and fourth branches is equipped with a first medium temperature sensor 322 and a first pressure sensor 323. When one circulating pump 321 fails, the other circulating pump 321 can be used to ensure the normal operation of the system, thus improving system reliability. Specifically, the flow direction control device 327 is used to prevent backflow of the heat exchange medium from damaging the circulating pump 321. The flow direction control device 327 can be a check valve, and the circulating pump 321 can be a horizontal centrifugal variable frequency water pump, thereby meeting the requirements of different flow rates under variable load conditions. Of course, in other embodiments, the circulating pump 321 can also be a diaphragm pump. When a diaphragm pump is used, it does not need to be used in conjunction with a check valve.

[0069] Preferably, the power assembly 32 further includes an expansion tank 324, which is located on the upstream connecting pipe of the third and fourth branches to provide stable pressure to the system. When the pressure of the heat exchange medium in the system decreases due to leakage, the gas pressure inside the expansion tank 324 is greater than the pressure of the heat exchange medium. At this time, the gas expands, squeezing out the heat exchange medium in the gas bladder to replenish the system until the pressure is balanced. When the pressure of the heat exchange medium in the system increases due to heating and expansion, exceeding the gas pressure inside the expansion tank 324, the gas is compressed, and the heat exchange medium in the system will flow into the gas bladder of the expansion tank 324 until the pressure is balanced. In addition, the expansion tank 324 is placed on the inlet side of the circulating pump 321 to prevent cavitation of the circulating pump 321 due to low system pressure.

[0070] To facilitate drainage, the power assembly 32 also includes a drainage pipeline, one end of which is connected to the upstream convergence pipeline of the third and fourth branches. A drainage device 325 is installed on the drainage pipeline for control. Specifically, the drainage device 325 can be a drainage valve.

[0071] To ensure the safe operation of the system, preferably, the power assembly 32 also includes a pressure relief device 326. The pressure relief device 326 is installed on the downstream connecting pipe of the third and fourth branches. Specifically, the downstream connecting pipe of the third and fourth branches is equipped with a pressure relief device 326, a first medium temperature sensor 322, and a first pressure sensor 323, respectively. When the pressure of the working medium in the system exceeds the safe value, the heat exchange medium is discharged to the outside of the system through the pressure relief device 326, thus preventing the system pressure from exceeding the safe value and ensuring the continuous and stable operation of the system. Specifically, the pressure relief device 326 can be a pressure relief valve.

[0072] Since the heat exchange medium absorbs heat from the server within the server heat exchange module 2, the temperature of the heat exchange medium at the output end of the server heat exchange module 2 is relatively high, and some of the heat exchange medium may vaporize due to heat. Preferably, an exhaust device 6 is provided on the pipeline between the output end of the server heat exchange module 2 and the detection component 33 to facilitate the discharge of gas. Specifically, the exhaust device 6 can be an exhaust valve.

[0073] Preferably, the detection component 33 includes a detection pipeline and a flow sensor 331, a second medium temperature sensor 332, and a second pressure sensor 333 disposed on the detection pipeline. The input end of the detection pipeline is connected to the output end of the server heat exchange module 2, and the input ends of the first branch 101 and the second branch 102 are both connected to the output end of the detection pipeline. Similarly, the PID controller is electrically connected to the flow sensor 331, the second medium temperature sensor 332, and the second pressure sensor 333, so that the PID controller can obtain the temperature and pressure of the heat exchange medium at the output end of the server heat exchange module 2, and also obtain the flow rate of the heat exchange medium. The PID controller can adjust the operating power of the circulating pump 321 according to the difference between the real-time flow rate of the heat exchange medium and the target value, as well as the pressure difference between the upstream and downstream of the server heat exchange module 2.

[0074] When the outdoor temperature is very low, and the temperature of the heat exchange medium inside the power assembly 32 is lower than the ambient dew point temperature of the server rack, condensation can easily occur on the outer wall of the power assembly 32. Liquids are not permitted within the server area. To detect and prevent this situation from occurring in a timely manner, preferably, the power auxiliary module 3 also includes a temperature and humidity sensor 34. The power auxiliary module 3 is installed inside the rack of the server rack, and the temperature and humidity sensor 34 measures the temperature and humidity at the rack. This temperature and humidity sensor 34 is electrically connected to a PID controller, enabling the PID controller to obtain real-time temperature and humidity at the rack in a timely manner. This allows the PID controller to adjust the various components to prevent condensation caused by excessively low temperatures of the heat exchange medium.

[0075] Preferably, the CDU system further includes a filter module 4, which filters the heat exchange medium. The input of the filter module 4 is connected to the output of the detection component 33, and the output of the filter module 4 is connected to the input of the outdoor heat dissipation module 1. That is, the outdoor heat dissipation module 1, the power component 32, the server heat exchange module 2, the detection component 33, the filter module 4, and the outdoor heat dissipation module 1 are connected in sequence to form a circulating heat exchange system. This system absorbs heat from the server and releases it to the outdoor environment. Furthermore, the filter module 4 ensures the cleanliness of the heat exchange medium within the system by filtering out impurities, thus preventing damage to the equipment.

[0076] Preferably, the filter module 4 includes at least a fifth branch and a sixth branch connected in parallel. The upstream connecting pipe of the fifth and sixth branches is connected to the output end of the detection component 33, and the downstream connecting pipe of the fifth and sixth branches is connected to the input end of the outdoor heat dissipation module 1. A first shut-off device 42, a filter 41, and a second shut-off device 43 are sequentially arranged on the fifth branch to allow the heat exchange medium to be filtered by flowing through the filter 41. A third shut-off device 44 is arranged on the sixth branch. When the filter 41 needs to be replaced or cleaned, the first shut-off device 42 and the second shut-off device 43 are closed, and the third shut-off device 44 is opened, thus ensuring the normal operation of the system during the replacement or cleaning of the filter 41. Specifically, the first shut-off device 42, the second shut-off device 43, and the third shut-off device 44 can all be shut-off valves. Of course, in some other embodiments, the first shut-off device 42, the second shut-off device 43, and the third shut-off device 44 can also be butterfly valves.

[0077] To facilitate monitoring of the saturation status of filter 41, a fourth pressure sensor 47 is installed on the upstream connecting pipe of the fifth and sixth branches, and a fifth pressure sensor 46 is installed on the downstream connecting pipe of the fifth and sixth branches. Optionally, the filter module 4 further includes a fourth shut-off device 45, which is located on the downstream connecting pipe of the fifth and sixth branches. Specifically, the fourth shut-off device 45 can be a shut-off valve. Of course, in some other embodiments, the fourth shut-off device 45 can also be a butterfly valve.

[0078] In addition, the CDU system also includes a fifth shut-off device 7 and a sixth shut-off device 8. Specifically, both the fifth shut-off device 7 and the sixth shut-off device 8 are installed on the pipeline connecting the input end of the power component 32 and the output end of the outdoor heat dissipation module 1 to facilitate maintenance of a specific module. Specifically, both the fifth shut-off device 7 and the sixth shut-off device 8 can be shut-off valves. Of course, in some other embodiments, the fifth shut-off device 7 and the sixth shut-off device 8 can also be butterfly valves.

[0079] like Figure 2 As shown, this embodiment also provides a control method applied to the aforementioned intercalation frame CDU system. The control method includes the following steps:

[0080] First, conduct experiments or calculations to obtain the preset flow rate L0 of the heat exchange medium required by the server and the preset temperature T0 at the output end of the power component 32 under different ambient temperatures.

[0081] Temperature and humidity sensor 34 measures the real-time temperature and humidity at the insertion frame, and then measures the ambient dry-bulb temperature to obtain the real-time ambient dew point temperature T2. Based on the server's required real-time cooling range and the experimental or calculation results above, the corresponding preset flow rate L0 and preset temperature T0 are determined.

[0082] The system determines whether the server's real-time required cooling range is greater than the preset cooling range. If so, it activates fan 11 and circulation pump 321. For example, if the server's current real-time required cooling range is 7°C and the preset cooling range is 3°C, the PID controller will determine this and activate fan 11, and then activate circulation pump 321.

[0083] The first medium temperature sensor 322 measures the real-time temperature T1 of the heat exchange medium at the output end of the power component 32 and determines whether T1 < T2 + k, where k is a positive number. If so, there is a risk of condensation on the outer wall of the indoor pipe. Since the environment where the server is located does not allow liquids, the system enters the priority anti-condensation mode; otherwise, it enters the cooling mode.

[0084] Priority anti-condensation mode: The PID controller adjusts the operating power of the fan 11, the operating power of the circulating pump 321, and the opening of the flow control device 13 in a PID manner until T1≥T2+k is satisfied, then the risk of condensation is eliminated and the cooling mode is entered.

[0085] Cooling mode: The PID controller adjusts the operating power of the fan 11, the operating power of the circulating pump 321, and the opening of the flow control device 13 until T1≤T0 is met and the real-time flow rate of the heat exchange medium L1≥L0. That is, the heat exchange medium in the server heat exchange module 2 can meet the requirements of cooling the server to the required temperature range.

[0086] In addition, the control method also includes a control scheme for automatic liquid replenishment. Specifically, the PID controller determines whether liquid replenishment is needed based on the real-time pressure value of the heat exchange medium measured by the third pressure sensor 5. When the real-time pressure value is lower than the preset liquid replenishment pressure and remains so for a first duration, the liquid replenishment pump 313 starts to inject heat exchange medium into the CDU system. Specifically, the liquid replenishment pump 313 runs for a second duration, stops for a third duration, runs for a second duration again, stops for a third duration, and so on, to achieve intermittent liquid replenishment, so that the pressure after liquid replenishment is closer to the target pressure value. When the value fed back by the third pressure sensor 5 is greater than or equal to the target pressure value, the liquid replenishment pump 313 stops running, and the automatic liquid replenishment ends.

[0087] The modular CDU system utilizes the control methods described above to achieve automatic system regulation, ensuring rapid cooling when a large temperature drop is required, and slowing the cooling rate to approach the target temperature when a smaller temperature drop is needed. This reduces energy consumption while meeting server cooling requirements. Furthermore, the modular CDU system also enables automatic liquid replenishment, reducing manual intervention and ensuring system stability.

[0088] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A frame-mounted CDU system, characterized in that, The insert frame CDU system includes at least: Outdoor heat dissipation module (1), the outdoor heat dissipation module (1) is installed outdoors and is used to dissipate heat and cool down the heat exchange medium by utilizing the cold energy of the outdoors; Server heat exchange module (2), the server heat exchange module (2) is used to allow the heat exchange medium to absorb the heat of the server; The power auxiliary module (3) includes at least a power component (32) and a detection component (33). The power component (32) is used to provide flow power for the heat exchange medium. The input end of the power component (32) is connected to the output end of the outdoor heat dissipation module (1). The output end of the power component (32) is connected to the input end of the server heat exchange module (2). The input end of the detection component (33) is connected to the output end of the server heat exchange module (2). The output end of the detection component (33) is connected to the input end of the outdoor heat dissipation module (1). The outdoor heat dissipation module (1) includes at least a first branch (101) and a second branch (102) connected in parallel, and the input terminals of the first branch (101) and the second branch (102) are both connected to the output terminal of the detection component (33); The outdoor heat dissipation module (1) also includes a medium collection pipeline, the output ends of the first branch (101) and the second branch (102) are both connected to the input end of the medium collection pipeline, and the output end of the medium collection pipeline is connected to the input end of the power assembly (32); The outdoor heat dissipation module (1) also includes a heat exchanger (12), which is installed on the first branch (101) and is also installed outdoors. A fan (11) is installed on one side of the heat exchanger (12) and the fan (11) is used to blow air onto the heat exchanger (12). The outdoor heat dissipation module (1) also includes a flow control device (13), which is installed on the second branch (102); The power assist module (3) also includes a temperature and humidity sensor (34). The power assist module (3) is installed in the slot of the server rack. The temperature and humidity sensor (34) is used to measure the temperature and humidity at the slot.

2. The insert-frame CDU system according to claim 1, characterized in that, The power auxiliary module (3) further includes an automatic liquid injection component (31), which is used to inject the heat exchange medium into the insert frame CDU system. The output end of the automatic liquid injection component (31) is connected to the power component (32).

3. The insert-frame CDU system according to claim 2, characterized in that, The automatic liquid injection assembly (31) includes at least an injection pipeline (311), an injection tank (312), and an injection pump (313). The injection tank (312) is connected to the input end of the injection pipeline (311), the output end of the injection pipeline (311) is connected to the power assembly (32), and the injection pump (313) is mounted on the injection pipeline (311).

4. The insert-frame CDU system according to claim 3, characterized in that, The automatic liquid injection assembly (31) also includes a liquid level sensor for measuring the liquid level in the injection tank (312).

5. The insert-frame CDU system according to claim 1, characterized in that, The power assembly (32) includes a third branch and a fourth branch, and also includes a first medium temperature sensor (322), a first pressure sensor (323), two circulation pumps (321) and two flow direction control devices (327). One of the circulation pumps (321) and one of the flow direction control devices (327) are located on the third branch, and the other circulation pump (321) and the other flow direction control device (327) are located on the fourth branch. The first medium temperature sensor (322) and the first pressure sensor (323) are both located on the downstream connecting pipe of the third branch and the fourth branch.

6. The insert-frame CDU system according to claim 5, characterized in that, The power assembly (32) also includes an expansion tank (324), which is disposed on the upstream confluence pipeline of the third branch and the fourth branch; The power assembly (32) also includes a drain pipe, one end of which is connected to the upstream converging pipe of the third branch and the fourth branch, and a drain device (325) is provided on the drain pipe; The power assembly (32) also includes a pressure relief device (326), which is provided on the downstream confluence pipeline of the third branch and the fourth branch.

7. The insert-frame CDU system according to claim 1, characterized in that, The detection component (33) includes a detection pipeline and a flow sensor (331), a second medium temperature sensor (332), and a second pressure sensor (333) disposed on the detection pipeline.

8. The insert-frame CDU system according to claim 1, characterized in that, The insert frame CDU system also includes a third pressure sensor (5), which is installed on the pipeline connecting the input end of the power assembly (32) and the output end of the outdoor heat dissipation module (1); The insert frame CDU system also includes a fifth cut-off device (7) and a sixth cut-off device (8), both of which are installed on the pipeline connecting the input end of the power component (32) and the output end of the outdoor heat dissipation module (1).

9. The insert-frame CDU system according to claim 1, characterized in that, The insert frame CDU system also includes a filter module (4), which is used to filter the heat exchange medium. The input end of the filter module (4) is connected to the output end of the detection component (33), and the output end of the filter module (4) is connected to the input end of the outdoor heat dissipation module (1).

10. The insert-frame CDU system according to claim 9, characterized in that, The filtering module (4) includes at least a fifth branch and a sixth branch connected in parallel. The fifth branch is provided with a first cut-off device (42), a filter (41), and a second cut-off device (43) in sequence, and the sixth branch is provided with a third cut-off device (44).

11. The insert-frame CDU system according to claim 10, characterized in that, A fourth pressure sensor (47) is installed on the upstream confluence pipe of the fifth branch and the sixth branch, and a fifth pressure sensor (46) is installed on the downstream confluence pipe of the fifth branch and the sixth branch. The filter module (4) further includes a fourth shut-off device (45), which is disposed on the downstream converging pipeline of the fifth branch and the sixth branch.

12. A control method, characterized in that, Applied to the slotted-frame CDU system as described in any one of claims 5-6, the control method includes the following steps: First, conduct experiments or calculations to obtain the preset flow rate L0 of the heat exchange medium required by the server and the preset temperature T0 at the output end of the power component (32) under different ambient temperatures; The real-time ambient dew point temperature T2 at the insertion frame and the real-time server temperature are obtained, and the corresponding values ​​of the preset flow rate L0 and the preset temperature T0 are determined. Determine whether the real-time cooling required by the server is greater than the preset cooling range. If so, turn on the fan (11) and the circulation pump (321). Measure the real-time temperature T1 of the heat exchange medium at the output end of the power component (32), and determine whether T1 < T2 + k, where k is a positive number. If yes, enter the priority anti-condensation mode; otherwise, enter the cooling mode. Priority anti-condensation mode: The operating power of the fan (11), the operating power of the circulating pump (321) and the opening degree of the flow control device (13) are adjusted by PID until T1≥T2+k is satisfied, and the cooling mode is entered. Cooling mode: The operating power of the fan (11), the operating power of the circulating pump (321) and the opening degree of the flow control device (13) are adjusted by PID until T1≤T0 and the real-time flow rate of the heat exchange medium L1≥L0 is satisfied.

Images