Intelligent liquid cooling system for data machine room

Abstract

The invention provides a data room intelligent liquid cooling system, which comprises a liquid cooling cabinet, a water chilling unit and an electric control cabinet, and is characterized in that the liquid cooling cabinet comprises a server position slot and a heat exchanger, the server position slot stores insulation cooling liquid, the heat exchanger is communicated with the server position slot through a cooling liquid circulation pipeline, and the circulation pipeline is provided with a cooling liquid circulation pump; the water chilling unit comprises a refrigerator, a water tank and a cold water circulating pump, the refrigerator communicates with the heat exchanger through a cold water circulating pipeline, and the cold water circulating pump is arranged on the cold water circulating pipeline; the electric control cabinet comprises a data acquisition device, a control device and a frequency converter, and the control device is electrically connected with the cooling liquid circulating pump through the frequency converter and used for controlling the working frequency of the cooling liquid circulating pump according to data acquired by the data acquisition device. According to the intelligent liquid cooling system for the data machine room, the temperature of the cooling liquid can be accurately controlled, rapid cooling and accurate heat dissipation are achieved, and meanwhile energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of liquid cooling technology, and more specifically to an intelligent liquid cooling system for data centers. Background Technology

[0002] In recent years, integrated circuit technology has developed rapidly, and the computing power of integrated circuit chips has been greatly improved. However, this has also brought about a problem: electronic devices based on new integrated circuits will generate increasingly serious heat dissipation problems as their performance improves. A good heat dissipation system is needed to ensure that electronic devices operate at a suitable temperature and avoid performance degradation and hardware damage due to overheating.

[0003] Traditional heat dissipation systems mainly include air cooling systems and water cooling systems. Among them, air cooling systems are the most widely used cooling and heat dissipation methods, but their cooling effect is limited and it is difficult to meet the heat dissipation requirements of high-performance and highly integrated electronic devices. Water cooling systems use liquids to directly or indirectly remove the heat generated by electronic devices, and have better heat dissipation efficiency and temperature control performance compared to air cooling systems.

[0004] Immersion liquid cooling is a novel heat dissipation method that involves immersing electronic devices in an insulating coolant. The flowing coolant directly contacts the heat dissipation components, achieving efficient heat conduction and effectively absorbing and dispersing the heat generated by the electronic devices. It offers advantages such as high heat dissipation efficiency and excellent heat dissipation effect. However, current applications of immersion liquid cooling technology in data centers require further optimization in terms of control precision and energy consumption. Summary of the Invention

[0005] This invention provides an intelligent liquid cooling system for data centers to solve the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] A smart liquid cooling system for a data center includes a liquid cooling cabinet, a chiller unit, and an electrical control cabinet;

[0008] The liquid-cooled cabinet includes server racks and a heat exchanger. The server racks store insulating coolant. The heat exchanger is connected to the server racks via a coolant circulation pipeline. A coolant circulation pump is installed on the circulation pipeline to pump the insulating coolant in the server racks into the heat exchanger for heat exchange and then return it.

[0009] The chiller unit includes a chiller, a water tank and a chilled water circulation pump. The chiller and the heat exchanger are connected by a chilled water circulation pipeline. The chilled water circulation pump is installed on the chilled water circulation pipeline and is used to pump the chilled water output by the chiller into the heat exchanger for heat exchange and then return it.

[0010] The electrical control cabinet includes a data acquisition device, a control device, and a frequency converter. The data acquisition device is used to collect information on the inlet and outlet temperatures and flow rates of the coolant. The control device is electrically connected to the coolant circulation pump through the frequency converter and is used to control the operating frequency of the coolant circulation pump based on the data collected by the data acquisition device.

[0011] Optionally, the data acquisition device is also used to acquire water temperature information of the chiller unit, and the control device is also electrically connected to the chilled water circulation pump through a frequency converter to control the operating frequency of the chilled water circulation pump according to the data acquired by the data acquisition device.

[0012] Optionally, the control device is also electrically connected to the chiller and is used to control the temperature of the chilled water output by the chiller based on the data collected by the data acquisition device.

[0013] Optionally, the control device includes a cloud server and a local controller, and the data acquisition device includes a wireless communication device. The data acquisition device transmits the acquired data to the cloud server through the wireless communication device, and the cloud server sends control commands to the local controller based on the acquired data.

[0014] Optionally, the liquid-cooled cabinet is also equipped with a liquid replenishment device, including a coolant tank and a liquid replenishment pump. The coolant tank is connected to the server bay via the liquid replenishment pump. The data acquisition device is also used to acquire the liquid level of the insulating coolant in the server bay, and the control device is also used to control the liquid replenishment pump tank to replenish the insulating coolant according to the liquid level information in the server bay.

[0015] Optionally, the server bay is connected to the heat exchanger via two sets of coolant circulation pipelines and coolant circulation pumps. The control device is used to control one coolant circulation pump to operate and to control the other coolant circulation pump to operate when the first pump fails.

[0016] Optionally, the chiller unit further includes a water supply tank and a water supply device, and the control device is also used to control the water supply device to supply water to the water tank when the chiller is working and drawing water from the water tank.

[0017] Optionally, the control device uses PID control to control the operating frequency of the coolant circulation pump based on the data collected by the data acquisition device.

[0018] Optionally, the control device may adjust the operating frequency control quantity based on the temperature difference and flow rate of the coolant entering and exiting the machine position tank during PID control.

[0019] Optionally, the control device generates control commands for the operating frequency of the coolant circulation pump according to the following formula:

[0020]

[0021] in, , where K is the base frequency for PID control; p K i K d These are the proportional coefficient, integral coefficient, and derivative coefficient for PID control; ΔT=T tank -T set For temperature difference, T tank T represents the measured temperature of the coolant in the coolant tank. set This is the target temperature (safe temperature) value of the coolant in the machine position tank.

[0022] This is a temperature difference correction term. Rated temperature difference (representing the rated heat exchange capacity of the heat exchanger (with the primary side chilled water temperature at a constant value)). , which is the temperature difference between the coolant entering and exiting the heat exchanger (the temperature difference between the coolant flowing out of and into the coolant tank). For flow correction items, The rated flow rate of the circulating pump, This is real-time traffic.

[0023] Compared with the prior art, the present invention provides an intelligent liquid cooling system for data centers, which has at least the following beneficial effects:

[0024] 1. This intelligent liquid cooling system for the data center uses immersion liquid cooling to cool the servers, which has a higher cooling effect than the traditional air cooling mode. At the same time, it can ensure a quiet environment in the data center and reduce energy consumption.

[0025] 2. This intelligent liquid cooling system for the data center collects the temperature, inlet and outlet temperatures, and inlet and outlet flow rates of the coolant in the server bays, and then controls the operating frequency of the circulating pump. This allows for more precise control of the coolant temperature in the server bays within a safe range, thus achieving precise control of server heat dissipation.

[0026] 3. This intelligent liquid cooling system for the data center can simultaneously control the chiller and the circulating pump, thereby controlling the primary cooling capacity input and the secondary coolant circulation. In the low-load mode of the server, the chiller and the circulating pump can be controlled to reduce their operating frequency, further reducing energy consumption while ensuring cooling capacity; in the high-load mode of the server, the chiller and the circulating pump can be controlled to increase their operating frequency, achieving rapid cooling and precise heat dissipation. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the intelligent liquid cooling system for data centers according to an embodiment of the present invention. Detailed Implementation

[0029] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the basic embodiments disclosed below.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0031] like Figure 1 As shown, the intelligent liquid cooling system for data centers according to an embodiment of the present invention includes a liquid cooling cabinet, a chiller unit, and an electrical control cabinet. The liquid cooling cabinet is located inside the data center, and the chiller cabinet is located outside the data center.

[0032] The liquid-cooled server rack includes server bays and a heat exchanger. The server bays store insulating coolant. The heat exchanger and server bays are connected via a coolant circulation pipeline. A coolant circulation pump is installed on the circulation pipeline to pump the insulating coolant from the server bays into the heat exchanger for heat exchange and then return it. Servers are placed in the bays and immersed in the insulating coolant. The heat generated by the servers during operation is transferred to the insulating coolant. The circulation pump pumps the high-temperature insulating coolant into the coolant circulation pipeline for heat exchange and cooling in the heat exchanger. The cooled insulating coolant then flows back into the bays, thus cooling the servers in the bays. The server bays can be configured with multiple bays to accommodate multiple server devices. The top of the server bays is sealed to reduce the ingress of external dust or other contaminants, extending the equipment's lifespan. The insulating coolant can be a liquid with high thermal conductivity and low volatility, such as a fluorinated liquid. The heat exchanger can be a new type of high-efficiency heat exchanger, such as a plate heat exchanger, to ensure effective heat exchange.

[0033] The chiller unit includes a chiller, a water tank, and a chilled water circulation pump. One end of the chiller is connected to the water tank, and the other end is connected to the heat exchanger via a chilled water circulation pipeline. The chilled water circulation pump is located on the chilled water circulation pipeline. The chiller draws a certain amount of water from the water tank, cools it to produce chilled water, and outputs it to the chilled water circulation pipeline. The chilled water circulation pump pumps the chilled water into the heat exchanger for heat exchange and then returns it to the chiller. In this system, the chilled water side of the chiller unit and heat exchanger is equivalent to the primary side, while the coolant side of the liquid-cooled cabinet and heat exchanger is equivalent to the secondary side. In the heat exchanger, heat is conducted between the chilled water and the coolant; the temperature of the coolant decreases, and the temperature of the chilled water increases.

[0034] The electrical control cabinet includes a data acquisition device, a control device, and a frequency converter. The data acquisition device collects liquid cooling data from key locations in the system. This data acquisition device includes coolant temperature sensors, inlet and outlet temperature sensors, and inlet and outlet flow sensors. The coolant temperature sensor includes at least one temperature sensor installed in the coolant tank to collect the temperature information of the coolant in the tank. The inlet and outlet temperature sensors include two temperature sensors installed on the two sections of coolant circulation pipes connecting the coolant tank and the heat exchanger to collect the temperature data of the coolant flowing out of and back into the coolant tank. The inlet and outlet flow sensors include flow meters installed on the two ends of the coolant circulation pipes connecting the coolant tank and the heat exchanger to collect the flow rate data of the coolant flowing out of and back into the coolant tank. The control device is electrically connected to each sensor of the data acquisition device. Each sensor transmits the collected liquid cooling data to the control device. The control device analyzes the received liquid cooling data to determine if the coolant temperature is within the target temperature range, the rate of temperature change, and other information, and then generates control commands to control the coolant circulation pump. The control device is electrically connected to the coolant circulation pump via a frequency converter. The control device sends control commands to the frequency converter, which controls the operating frequency of the coolant circulation pump, thereby precisely adjusting the temperature of the insulating coolant in the server bay to ensure the cooling effect on the server.

[0035] In one optional implementation, when generating control commands for the coolant circulation pump, the control device generates control commands for the operating frequency (speed) of the coolant circulation pump by referring to the following formula;

[0036]

[0037] in, , where K is the base frequency for PID control; p K i K d These are the proportional coefficient, integral coefficient, and derivative coefficient for PID control; ΔT=T tank -T set For temperature difference, T tankT represents the measured temperature of the coolant in the coolant tank. set This is the target temperature (safe temperature) value of the coolant in the machine position tank.

[0038] This is a temperature difference correction term. Rated temperature difference (representing the rated heat exchange capacity of the heat exchanger (with the primary side chilled water temperature at a constant value)). , which is the temperature difference between the coolant entering and exiting the heat exchanger (the temperature difference between the coolant flowing out of and into the coolant tank). For flow correction items, The rated flow rate of the circulating pump, This is real-time traffic.

[0039] Based on PID control, this control device makes corrections according to the temperature difference and flow rate of the coolant entering and exiting the heat exchanger, enabling more precise control of the coolant temperature and keeping the coolant in the tank at a safe temperature.

[0040] In this embodiment, the data acquisition device is also used to collect water temperature information of the chiller unit. Specifically, the data acquisition device also includes a chilled water temperature sensor, which comprises two temperature sensors installed on the chilled water circulation pipes at both ends connecting the heat exchanger and the chiller. These sensors are used to collect temperature data of the chilled water flowing out of and back into the chiller. The control device can generate control commands for the chilled water circulation pump and the chiller based on the temperatures of the coolant flowing into and out of the heat exchanger and the chilled water, as well as the coolant temperature information. The control device is electrically connected to the chilled water circulation pump via a frequency converter, which controls the operating frequency of the chilled water circulation pump. The control device is also electrically connected to the drive mechanism of the chiller to control the cooling capacity of the chiller, thereby controlling the temperature of the chilled water output by the chiller.

[0041] Optionally, the control device includes a cloud server and a local controller. The data acquisition device includes a wireless communication device, which transmits the acquired liquid cooling data to the cloud server via the wireless communication device. The cloud server then sends control commands to the local controller based on the liquid cooling data. The local controller, which may be a PLC controller, is used to preprocess the liquid cooling data acquired by the data acquisition device and transmit the preprocessed data to the cloud server.

[0042] Optionally, the liquid-cooled rack is also equipped with a liquid replenishment device, including a coolant tank and a replenishment pump. The coolant tank stores insulating coolant and is connected to the server bay via the replenishment pump. The data acquisition device also includes a level sensor to collect the level of insulating coolant in the server bay. The control device is also used to control the replenishment pump to replenish insulating coolant based on the level information in the server bay. When the insulating coolant decreases due to evaporation or other reasons, to prevent the server from not being submerged, the control device can automatically control the replenishment pump to start and automatically replenish the coolant when the level sensor detects a decrease in the coolant level.

[0043] Optionally, the server bays and the heat exchanger are connected via two coolant circulation pipelines, each equipped with a coolant circulation pump. During normal system operation, the control unit operates one coolant circulation pump; if that pump fails, the control unit operates the other. This redundancy of the two circulation pipelines ensures stable system operation.

[0044] Optionally, the chiller unit also includes a water supply tank and a water supply device. The water supply device may include a level sensor for detecting the water level in the water tank and a water supply pump that connects the water supply tank to the water tank. When the chiller is working and pumps water from the water tank to lower the water level in the water tank, the control device receives the water level information detected by the level sensor and controls the water supply pump to work to pump water from the water supply tank into the water tank to replenish the water tank.

[0045] The intelligent liquid cooling system for data centers in this invention reduces the operating frequency of the circulation pump and chiller when the server heat generation is low, thereby reducing the flow rate and volume of the coolant while ensuring sufficient cooling capacity, and further reducing energy consumption while achieving cooling. When the server heat generation is high, the operating frequency of the circulation pump and chiller is increased, thereby increasing the flow rate and volume of the coolant, achieving rapid cooling and optimal heat dissipation.

[0046] In practical application scenarios, the heat exchangers, coolants, chillers, circulating pumps, frequency converters, and other components of the intelligent liquid cooling system for data centers in this embodiment of the invention can all be made of existing equipment with corresponding functions; and the equipment or components such as machine slots, circulating pipelines, and water tanks can all be customized by selecting materials with corresponding functions from existing technologies according to the actual working conditions and the requirements of parameters such as size, flow rate, and pressure.

[0047] Furthermore, the intelligent liquid cooling system for the data center can also be equipped with other devices or components, or the actual placement of each device or component can be adjusted to achieve the actual application or other functions of the intelligent liquid cooling system for the data center. For example, the data acquisition device also includes a conductivity sensor, which is used to monitor the conductivity of the coolant in the server bay in real time and issue an alarm message in a timely manner when the conductivity exceeds the standard to ensure the safe operation of the server.

[0048] It should be noted that, depending on the implementation needs, the various components described in the embodiments of the present invention can be split into more components, or two or more components or parts of components can be combined into new components to achieve the purpose of the embodiments of the present invention.

[0049] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A data center intelligent liquid cooling system, characterized in that, The liquid cooling cabinet, the water chiller and the electric control cabinet are included. The liquid cooling cabinet includes a server site tank and a heat exchanger, the server site tank stores insulating coolant, the heat exchanger and the server site tank are connected through a coolant circulation pipeline, a coolant circulation pump is arranged on the pipeline to pump the insulating coolant in the server site tank into the heat exchanger for heat exchange and backflow. The water chiller includes a refrigerating machine, a water tank and a cold water circulation pump, the refrigerating machine and the heat exchanger are connected through a cold water circulation pipeline, the cold water circulation pump is arranged on the pipeline to pump the chilled water output by the refrigerating machine into the heat exchanger for heat exchange and backflow. The electric control cabinet includes a data acquisition device, a control device and a frequency converter, the data acquisition device is used to acquire the inlet and outlet temperature and flow information of the coolant, the control device is electrically connected with the coolant circulation pump through the frequency converter and is used to control the working frequency of the coolant circulation pump according to the data acquired by the data acquisition device.

2. The intelligent liquid cooling system for data center rooms of claim 1, wherein, The data acquisition device is also used to acquire the water temperature information of the water chiller, the control device is also electrically connected with the cold water circulation pump through the frequency converter and is used to control the working frequency of the cold water circulation pump according to the data acquired by the data acquisition device.

3. The intelligent liquid cooling system for data center rooms of claim 2, wherein, The control device is also electrically connected with the refrigerating machine and is used to control the temperature of the chilled water output by the refrigerating machine according to the data acquired by the data acquisition device.

4. The intelligent liquid cooling system for data center rooms of claim 1, wherein, The control device includes a cloud server and a local controller, the data acquisition device includes a wireless communication device, the data acquisition device transmits the acquired data to the cloud server through the wireless communication device, and the cloud server sends control instructions to the local controller according to the acquired data.

5. The intelligent liquid cooling system for data center rooms of claim 1, wherein, The liquid cooling cabinet also includes a coolant supplement device, which includes a coolant tank and a coolant supplement pump, the coolant tank is connected with the server site tank through the coolant supplement pump, the data acquisition device is also used to acquire the liquid level of the insulating coolant in the server site tank, and the control device is also used to control the coolant supplement pump to supplement the insulating coolant in the tank according to the liquid level information of the server site tank.

6. The intelligent liquid cooling system for data center rooms of claim 1, wherein, The server site tank and the heat exchanger are connected through two groups of coolant circulation pipelines and coolant circulation pumps, and the control device is used to control one coolant circulation pump to work and control the other coolant circulation pump to work when the one coolant circulation pump fails.

7. The intelligent liquid cooling system for data center rooms of claim 1, wherein, The water chiller also includes a water supplement tank and a water supplement device, and the control device is also used to control the water supplement device to supplement water in the water tank when the refrigerating machine works to pump water from the water tank.

8. The intelligent liquid cooling system for data center rooms of any one of claims 1-7, wherein, The control device uses a PID control mode to control the working frequency of the coolant circulation pump according to the data acquired by the data acquisition device.

9. The intelligent liquid cooling system for data center rooms of claim 8, wherein, The control device corrects the working frequency control amount according to the temperature difference and flow of the coolant in the server site tank when performing PID control.

10. The intelligent liquid cooling system for data center rooms of claim 9, wherein, The control device generates a control instruction for the working frequency of the coolant circulation pump according to the following formula: wherein, is the basic frequency for performing PID control; in the formula, K p , K i , K d are respectively the proportional coefficient, the integral coefficient and the differential coefficient of the PID control; ΔT=T tank −T set is the temperature difference, T tank is the detected temperature value of the cooling liquid in the machine slot, and T set is the target temperature value (safety temperature value) of the cooling liquid in the machine slot. is a temperature difference correction term, is a rated temperature difference (indicating a rated heat exchange capacity of the heat exchanger (the temperature of the primary-side chilled water is a constant value)), is a temperature difference of the cooling liquid in and out of the heat exchanger (the temperature difference of the cooling liquid flowing out and flowing in the heat sink tank); is a flow rate correction term, is a rated flow rate of the circulating pump, is a real-time flow rate.

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