A control method of a machine room cooling system

Abstract

The embodiment of the application provides a kind of control method of machine room cooling system, compared with prior art, with the following technical effects: according to the first pressure difference between closed cold channel and floor under air supply channel and first pressure difference threshold value is compared, according to the comparison result, the opening of each air supply port corresponding to the closed cold channel is adjusted, and the air supply volume is adjusted in time, to realize the accurate, rapid adjustment of local air volume, while ensuring that the closed cold channel responds quickly. Thus, by detecting the pressure difference between the closed cold channel and the floor under the air supply channel, the air supply volume in each closed cold channel is adjusted in time according to the comparison result; Intelligent control of the closed cold channel accurate air supply system is realized.

Description

Technical Field

[0001] This application relates to the technical field of heating, ventilation and air conditioning, and more specifically, to a control method for a computer room cooling system. Background Technology

[0002] With the development of the information industry, more and more data centers are being built across the country. During the operation of data center computer rooms, various types of equipment generate a lot of heat due to power consumption, and the heat generated is not uniform. Therefore, in order to ensure that electronic equipment operates normally at an appropriate temperature, this heat needs to be efficiently and stably dissipated.

[0003] Currently, in data center operations, there are two main cooling solutions: air cooling and liquid cooling. Air cooling, with its relatively lower construction and operation costs, is widely used in data centers. However, traditional air supply methods cannot effectively control and dissipate heat from localized hotspots. Therefore, there is an urgent need for a precision air conditioning system capable of providing balanced temperature control for large areas with multiple server racks. Summary of the Invention

[0004] This application provides a control method for a computer room cooling system to solve the problem of not being able to perform precise temperature equalization control in large-area, multi-rack environments.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A control method for a computer room cooling system, the computer room cooling system including a computer room and an air conditioning room, the air conditioning room being provided on at least one side of the computer room; the computer room is provided with multiple rows of server racks, two rows of server racks forming a group, the two rows of server racks in each group forming a sealed closed cold aisle, and adjacent groups of server racks forming an open hot aisle; one side of each server rack is provided with an air inlet communicating with the closed cold aisle, and the other side of each server rack is provided with an air outlet communicating with the open hot aisle; the air conditioning room is equipped with multiple air conditioners supplying cold air; an underfloor air supply duct is provided below the computer room and the air conditioning room, the cold air outlet of each air conditioner communicating with the underfloor air supply duct, the closed cold aisle communicating with the underfloor air supply duct through multiple air outlets, and a return air vent is provided between the computer room and the air conditioning room, connecting the open hot aisle to the air conditioning room;

[0007] The method further includes:

[0008] Obtain the first pressure difference value between the enclosed cold aisle and the underfloor air supply duct;

[0009] Determine whether the first differential pressure value is less than the first differential pressure threshold. If so, increase the opening of each air outlet corresponding to the closed cold aisle.

[0010] Optionally, after determining whether the first differential pressure value is less than the first differential pressure threshold, the method further includes:

[0011] When the first differential pressure value is greater than or equal to the second differential pressure threshold, the opening of each of the air outlets corresponding to the closed cold aisle is reduced; wherein, the second differential pressure threshold is greater than the first differential pressure threshold.

[0012] Optionally, the method further includes:

[0013] Obtain the first temperature value at each of the air outlets within each of the enclosed cold aisles;

[0014] Determine whether the first temperature value is greater than or equal to the first temperature threshold. If so, increase the opening of the air outlet corresponding to the first temperature value.

[0015] Optionally, after increasing the opening of the air outlet corresponding to the first temperature value, the method further includes:

[0016] Calculate the first average temperature of all the first temperature values ​​within each of the enclosed cold aisles;

[0017] Determine whether the ratio of the first temperature value to the first average temperature is greater than or equal to the deviation threshold. If so, reduce the opening of the air outlet corresponding to the first temperature value.

[0018] Optionally, the method further includes:

[0019] Obtain the first pressure value of several preset pressure detection points in the underfloor air supply channel;

[0020] Determine whether the number of preset pressure detection points corresponding to the first pressure value that exceeds the first preset pressure range is greater than or equal to the first quantity threshold. If so, adjust the air volume of all the air conditioners.

[0021] Optionally, the method further includes:

[0022] Obtain the second pressure value of the preset pressure detection point in the row where the air conditioner cold air outlet extends;

[0023] Determine whether the difference between the maximum and minimum values ​​of the second pressure value in the current row is greater than or equal to the second differential pressure threshold. If so, increase the air volume of the air conditioner corresponding to the current row or start / stop the air conditioner corresponding to the current row.

[0024] Optionally, the method further includes:

[0025] Determine whether the second temperature value of the underfloor air supply duct is greater than or equal to the third temperature threshold. If so, adjust the air supply temperature of all air conditioners.

[0026] Optionally, the computer room cooling system further includes a fast electric air volume regulating valve, which is located on the air outlet and is used to adjust the opening of the air outlet.

[0027] Optionally, the computer room cooling system further includes:

[0028] A plurality of first temperature sensors, each of which is located within the enclosed cold aisle at a position relative to the air outlet;

[0029] Several pressure sensors and a second temperature sensor are respectively located in the air supply channel under the floor and arranged in an array.

[0030] Optionally, a differential pressure sensor is installed between the enclosed cold aisle on both sides of the air outlet and the underfloor air supply channel, and the differential pressure sensor is connected to the controller.

[0031] This application provides a control method for a computer room cooling system. The method further includes: the computer room cooling system includes a computer room and an air conditioning room, with an air conditioning room located on at least one side of the computer room; multiple rows of server racks are arranged in the computer room, with two rows of server racks forming a group, and the two rows of server racks in each group forming a sealed closed cold aisle, and an open hot aisle between two adjacent groups of server racks; one side of the server rack has an air inlet communicating with the closed cold aisle, and the other side of the server rack has an air outlet communicating with the open hot aisle; multiple air conditioners supplying cold air are installed in the air conditioning room; an underfloor air supply duct communicating with the computer room and the air conditioning room is provided below, with the cold air outlet of the air conditioner communicating with the underfloor air supply duct, the closed cold aisle communicating with the underfloor air supply duct through multiple air outlets, and a return air outlet communicating with the air conditioning room between the computer room and the air conditioning room; obtaining a first pressure difference value between the closed cold aisle and the underfloor air supply duct; determining whether the first pressure difference value is less than a first pressure difference threshold, and if so, increasing the opening of each air outlet corresponding to the closed cold aisle.

[0032] The control method for a computer room cooling system provided in this application embodiment has the following technical advantages compared to the prior art:

[0033] By comparing the first pressure difference value between the enclosed cold aisle and the underfloor air supply duct with a first pressure difference threshold, the opening degree of each air outlet corresponding to the enclosed cold aisle is adjusted according to the comparison result, and the air supply volume is adjusted in a timely manner to achieve precise and rapid adjustment of local air volume, while ensuring rapid response of the enclosed cold aisle. Therefore, by detecting the pressure difference value between the enclosed cold aisle and the underfloor air supply duct, the air supply volume in each enclosed cold aisle is adjusted in a timely manner according to the comparison result; thus, intelligent control of the enclosed cold aisle precision air supply system is achieved. Attached Figure Description

[0034] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0035] Figure 1 A flowchart illustrating a control method for a computer room cooling system provided in this application embodiment;

[0036] Figure 2 This is a schematic diagram of the structure of a computer room cooling system according to this application;

[0037] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure along the AA direction;

[0038] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure along the BB direction.

[0039] The following labels are shown in the attached diagram:

[0040] In the diagram: 1 is the computer room, 2 is the air conditioning room, 3 is the server rack, 4 is the air conditioner, 5 is the underfloor air supply duct, 6 is the enclosed cold aisle, 7 is the open hot aisle, 8 is the air supply outlet, 9 is the air inlet, 10 is the air outlet, 11 is the return air outlet, 12 is the air guide fan, 13 is the fast electric air volume regulating valve, 14 is the first temperature sensor, 15 is the differential pressure sensor, 16 is the controller, 17 is the pressure sensor, 18 is the second temperature sensor, 19 is the constant humidity machine, 20 is the manual air volume regulating valve, and 21 is the insulation layer. Detailed Implementation

[0041] This invention discloses a control method for a computer room cooling system to solve the problem of not being able to perform precise temperature equalization control in large-area, multi-rack environments.

[0042] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0043] Please see Figure 1-4 , Figure 1 A flowchart illustrating a control method for a computer room cooling system provided in this application embodiment; Figure 2 This is a schematic diagram of the structure of a computer room cooling system according to this application; Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure along the AA direction; Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure along the BB direction.

[0044] In one specific embodiment, this application provides a control method for a computer room cooling system, including a computer room cooling system, such as... Figure 1-3 As shown, the system includes a computer room 1, an air-conditioning room 2, and a control system. An air-conditioning room 2 is located on at least one side of the computer room 1. This application does not limit the number of air-conditioning rooms 2; the number can be adjusted according to the size, layout, and actual cooling needs of the computer room 1. The computer room 1 may have an air-conditioning room 2 on only one side, or it may have air-conditioning rooms 2 on multiple sides, such as... Figure 1-2 As shown, an air-conditioning room 2 is set on each of the opposite sides of the computer room 1 so that cold air flows from both sides to the underfloor air supply channel 5, increasing the amount of cold air in the underfloor air supply channel 5 and ensuring that both ends of a row of server racks have good heat dissipation effect.

[0045] The computer room 1 is equipped with multiple rows of server racks 3, with two rows of racks 3 forming a group. The two rows of racks 3 in each group form a sealed closed cold aisle 6, and the two adjacent groups of racks 3 form an open hot aisle 7. One side of the rack 3 has an air inlet 9 that connects to the closed cold aisle 6, and the other side of the rack 3 has an air outlet 10 that connects to the open hot aisle 7. The cold air in the closed cold aisle 6 enters the rack 3 through the air inlet 9 to exchange heat with the rack 3, and the hot air enters the open hot aisle 7 through the air outlet 10, thereby achieving continuous cooling of the inside of the rack 3. The closed cold aisle 6 can be sealed by sealing plates and sealing components to enclose and seal the space between the two rows of racks 3, so that the cold air inside can only enter the rack 3 through the air inlet 9, thereby achieving effective utilization of the cold air. Other structures that can achieve this function can also be used.

[0046] The air-conditioning room 2 is equipped with multiple air conditioners 4 that supply cold air. The air conditioners 4 are preferably precision air conditioners specifically designed for computer rooms that can fully meet the environmental requirements of the computer room.

[0047] Below the computer room 1 and the air-conditioning room 2, there is a connected underfloor air supply duct 5. The cold air outlet of the air conditioner 4 is connected to the underfloor air supply duct 5. During operation, the air conditioner 4 continuously supplies cold air to the underfloor air supply duct 5 according to system commands. The closed cold aisle 6 is connected to the underfloor air supply duct 5 through multiple air outlets 8. As the cold air in the underfloor air supply duct 5 continues to increase, a pressure difference is formed between the closed cold aisle 6 and the underfloor air supply duct 5. The cold air in the underfloor air supply duct 5 naturally flows into the closed cold aisle 6 from the air outlets 8. There is a return air vent 11 between the computer room 1 and the air-conditioning room 2, which connects the open hot aisle 7 to the air-conditioning room 2. The hot air that has completed heat exchange in the computer room 1 can flow back to the air-conditioning room 2 through the return air vent 11.

[0048] Specifically, the above control methods include:

[0049] S11: Obtain the first pressure difference value between the enclosed cold aisle and the underfloor air supply duct;

[0050] S12: Determine whether the first differential pressure value is less than the first differential pressure threshold;

[0051] S13: If so, increase the opening of each air outlet corresponding to the closed cold aisle.

[0052] The first differential pressure value can be obtained by setting a differential pressure sensor 15. A differential pressure sensor 15 is set between the closed cold aisle 6 on both sides of the air outlet 8 and the air supply channel 5 under the floor. The differential pressure sensor 15 is connected to the controller 16 to ensure stable air supply in the system.

[0053] When the first differential pressure value is less than the first differential pressure threshold, the opening of each air outlet corresponding to the closed cold aisle is increased so that the differential pressure of a specific closed cold aisle can be precisely adjusted, thereby achieving precise and rapid adjustment of local air volume and ensuring the temperature and pressure balance of each air outlet.

[0054] In one embodiment, after determining whether the first differential pressure value is less than a first differential pressure threshold, the method further includes:

[0055] S14: When the first differential pressure value is greater than or equal to the second differential pressure threshold, reduce the opening of each air outlet corresponding to the closed cold aisle; wherein the second differential pressure threshold is greater than the first differential pressure threshold. In one embodiment, the second differential pressure threshold can be set to 25 Pa, and the first differential pressure threshold can be set to 20 Pa.

[0056] It is understandable that the above control method can be implemented by setting up a control system. The control system includes a controller 16, which is a DDC controller or a PLC controller and has an Ethernet-based network interface, enabling remote communication and control. The controller 16 is connected to a central control device via the communication interface, and the air conditioner 4 is connected to the controller 16 via the communication interface. The air conditioner 4 has a group control function and can be started and stopped, or its supply air temperature and air volume can be adjusted under the control of the controller 16. The specific form of the control system is not limited, as long as the same technical effect can be achieved.

[0057] The control method for a computer room cooling system provided in this application embodiment has the following technical advantages compared to the prior art:

[0058] By comparing the first pressure difference value between the enclosed cold aisle and the underfloor air supply duct with a first pressure difference threshold, the opening degree of each air outlet corresponding to the enclosed cold aisle is adjusted according to the comparison result, and the air supply volume is adjusted in a timely manner to achieve precise and rapid adjustment of local air volume, while ensuring rapid response of the enclosed cold aisle. Therefore, by detecting the pressure difference value between the enclosed cold aisle and the underfloor air supply duct, the air supply volume in each enclosed cold aisle is adjusted in a timely manner according to the comparison result; thus, intelligent control of the enclosed cold aisle precision air supply system is achieved.

[0059] The above methods also include:

[0060] S14: Obtain the first temperature value at each air outlet in each enclosed cold aisle;

[0061] S15: Determine whether the first temperature value is greater than or equal to the first temperature threshold;

[0062] S16: If so, increase the opening of the air outlet corresponding to the first temperature value.

[0063] Understandably, each enclosed cold aisle has several air outlets, each equipped with a temperature sensor. When a first temperature value at an air outlet is greater than or equal to a first temperature threshold, the opening of the air outlet corresponding to that first temperature value is increased. This allows for precise temperature regulation of the local air outlets within each enclosed cold aisle, enabling accurate and rapid adjustment of local airflow and achieving a fast response within the enclosed cold aisle. A rapid-acting electric airflow regulating valve is installed at each air outlet to adjust its opening.

[0064] In order to prevent excessive temperature adjustment and deviation from the threshold after increasing the opening of the air outlet corresponding to the first temperature value, the above method also includes:

[0065] S17: Calculate the first average temperature of all first temperature values ​​within each enclosed cold aisle;

[0066] S18: Determine whether the ratio of the first temperature value to the average first temperature value is greater than or equal to the deviation threshold;

[0067] S19: If so, reduce the opening of the air outlet corresponding to the first temperature value.

[0068] This design prevents excessive temperature adjustments at any air outlet within the enclosed cold aisle, ensuring balanced temperature control throughout the aisle. The first temperature threshold can be set to 25℃; simultaneously, a second temperature threshold, 27℃, is set for key areas with high heat generation in the server racks. When the first temperature value from any first temperature sensor in a key area exceeds the second temperature threshold, the opening of all rapid electric airflow regulating valves in that area is adjusted.

[0069] In this embodiment, the method further includes:

[0070] S110: Obtain the first pressure value of several preset pressure detection points in the underfloor air supply duct;

[0071] S120: Determine whether the number of preset pressure detection points corresponding to the first pressure value that exceeds the first preset pressure range is greater than or equal to the first quantity threshold.

[0072] S130: If so, adjust the airflow of all air conditioners.

[0073] Several preset pressure detection points can be set in the underfloor air supply duct. Pressure sensors are set at each pressure detection point to obtain the first pressure value of the several preset pressure detection points. At the same time, a first preset pressure range is preset. When the number of first pressure values ​​exceeding the first preset pressure range is greater than or equal to a preset first quantity threshold, it is considered that there are first pressure values ​​exceeding the first quantity threshold in the underfloor air supply duct that are not within a reasonable range. This is to adjust the air volume of all air conditioners to make the pressure in the underfloor air supply duct balanced, so as to ensure balanced air supply.

[0074] In this embodiment, the method further includes:

[0075] Obtain the second pressure value of the preset pressure detection point in the row where the air conditioner's cold air outlet extends;

[0076] Determine whether the difference between the maximum and minimum values ​​of the second pressure value in the current row is greater than or equal to the second pressure difference threshold. If so, increase the air volume of the air conditioner corresponding to the current row or start / stop the air conditioner corresponding to the current row.

[0077] Specifically, several preset pressure detection points are set in the row along the extension direction of the air conditioner's cold air outlet. Each preset pressure detection point is equipped with a pressure sensor. When the difference between the maximum and minimum pressure values ​​detected at each preset pressure detection point in the row is greater than or equal to a second pressure difference threshold, it is considered that the air outlet pressure of the current row is uneven. The air outlet pressure of the row can be balanced by increasing or decreasing the airflow of the corresponding air conditioner in that row, preferably by increasing the airflow of the corresponding air conditioner in that row to better facilitate pressure balance; alternatively, pressure balance can be achieved by starting and stopping the corresponding air conditioner in that row. This can be set as needed, thereby enabling precise control of the air supply pressure in a local row and achieving balanced air supply.

[0078] In another embodiment, the above method further includes:

[0079] The system determines whether the second temperature value of the underfloor air supply duct is greater than or equal to the third temperature threshold. If so, it adjusts the supply air temperature of all air conditioners. This setting enables unified control of the temperature in the underfloor air supply duct.

[0080] Specifically, the control method for the computer room cooling system includes the following steps:

[0081] (1) System setup. The components are set up according to the computer room cooling system. Based on the numerical simulation results, the fast electric air volume regulating valve, the first temperature sensor, the pressure sensor, the second temperature sensor, and the differential pressure sensor are set up.

[0082] (2) Static air pressure, temperature and humidity balance adjustment. Close the fast electric air volume regulating valve, turn on the air conditioner at full load, adjust the opening of the manual air volume regulating valve, and perform static air pressure balance adjustment of the system to achieve the initial state setting of the air outlet.

[0083] (3) Dynamic air pressure, temperature, and humidity balance control. The operating system uses a controller to monitor and collect the measured values ​​of the first temperature sensor, pressure sensor, second temperature sensor, and differential pressure sensor in the underfloor air supply duct and enclosed cold aisle at certain time intervals, and adjusts the status of the rapid electric air volume regulating valve and / or air conditioner based on the obtained measured values. Adjustment priority: In case of conflict in the control system, adjust the air conditioner's air output volume > adjust the number of connected air conditioners > adjust the rapid electric air volume regulating valve.

[0084] Based on the control method of the above-mentioned computer room cooling system, the computer room cooling system also includes the following structure. The detection of each detection point in the computer room cooling system can be achieved through specific sensors in the computer room cooling system, and the two can be mutually referenced:

[0085] Furthermore, a rapid electric airflow regulating valve 13 is installed on the air outlet 8, and the rapid electric airflow regulating valve 13 is connected to the controller 16. The rapid electric airflow regulating valve 13 can be installed on the air outlets 8 at both ends and in the middle area of ​​each enclosed cold aisle 3, or it can be installed on each air outlet 8. It can be evenly distributed, or the density of the distribution can be increased in areas of high heat generation in the cabinet as needed. The specific distribution can be adjusted randomly according to the site requirements. The controller 16 can achieve precise and rapid adjustment of local airflow by adjusting the opening of the rapid electric airflow regulating valve, in conjunction with the comprehensive control of the number of air conditioner start-ups and shutdowns, outlet air temperature, and outlet air volume, thereby ensuring the temperature and pressure balance of each air outlet.

[0086] Furthermore, multiple first temperature sensors 14 are evenly arranged above the air outlet 8 in the enclosed cold aisle 6, and the first temperature sensors 14 are connected to the controller 16.

[0087] Furthermore, multiple pressure sensors 17 and a second temperature sensor 18 are arranged in an array within the underfloor air supply duct 5. The pressure sensors 17 and the second temperature sensor 18 are connected to the controller 16, such as... Figure 1 As shown in the figure, one distribution embodiment of the pressure sensor 17 and the second temperature sensor 18 is included. In this embodiment, the pressure sensor 17 and the second temperature sensor 18 are disposed within the air supply duct 5 under the floor.

[0088] Furthermore, a humidifier 19 is installed in the air-conditioned room 2. The air outlet of the humidifier 19 is connected to the underfloor air supply channel 5. The humidifier 19 is connected to the controller 16. The first temperature sensor 14 and the second temperature sensor 18 are both equipped with humidity-sensitive elements to form a temperature and humidity sensor. The controller 16 receives the system internal humidity information fed back by the first temperature sensor 14 and the second temperature sensor 18. According to the system requirements, the controller controls the humidifier 18 to deliver air with a certain humidity to the underfloor air supply channel 5. The humidity in the machine room 1 is adjusted by the flow of cold air to ensure constant humidity.

[0089] Furthermore, a manual air volume regulating valve 20 is installed at the connection between the underfloor air supply duct 5 and the air outlet 8. The manual air volume regulating valve 20 adds the static air pressure balance debugging function of the system and realizes the setting of the initial state of the air outlet.

[0090] Furthermore, an insulation layer 21 is laid on the bottom surface of the underfloor air supply duct 5 to reduce cold loss.

[0091] Furthermore, the controller 16 is connected to a guide fan 12, which is installed at an air outlet 8, an air inlet 9, an air outlet 10, or a return air outlet 11. This application allows for more precise airflow guidance throughout the cooling system via the guide fan 12. The guide fan 12 is preferably installed at the air inlet 9 or the air outlet 10, ensuring precise airflow guidance down to each cabinet 3. The controller 16 controls the guide fan 12 based on temperature feedback information from each individual cabinet 3, enabling it to guide the flow of cold air for efficient cooling.

[0092] Preferably, multiple air outlets 8 are evenly arranged along the extension direction of the enclosed cold aisle 6 to achieve uniform delivery of cold air into the enclosed cold aisle 6.

[0093] The cabinet is also equipped with a fourth temperature sensor, which is connected to the controller. Based on the cabinet temperature obtained by the fourth temperature sensor, the controller adjusts the opening of the fast electric air volume regulating valve in the corresponding closed cold aisle, the air volume of the air conditioner, the air temperature of the air conditioner, and the number of air conditioners turned on.

[0094] When implementing this application, the monitoring and control points of the enclosed cold aisle can be designed according to the on-site installation conditions. By detecting the temperature and humidity changes in the enclosed cold aisle, the rapid electric regulating dampers can be controlled to adjust the air volume changes in each enclosed cold aisle, and the temperature and humidity of each enclosed cold aisle can be precisely controlled. This enables real-time acquisition of temperature and humidity demand data in the enclosed cold aisle, and real-time and efficient adjustment of the air volume according to the temperature and humidity demand of the cold aisle, thereby realizing the intelligent control of the enclosed cold aisle precision air supply system.

[0095] This application is applicable to temperature equalization control in large-area, multi-rack environments. The working principle and process are as follows:

[0096] Air conditioner 4 supplies cold air to the underfloor air supply duct 5 according to the command of controller 16. A pressure difference is formed between the closed cold aisle 6 and the underfloor air supply duct 5. The cold air continuously flows into the closed cold aisle 6 from the air outlet 8, and then enters the cabinet 3 through the air inlet 9 for cooling. The hot air flows into the open hot aisle 7 from the air outlet 10, and finally flows back into the air-conditioned room 2 through the return air outlet 11. During this airflow circulation process, controller 16 can adjust the number of air conditioners 4 that start and stop, the air volume and air temperature of each air conditioner 4 according to the collected temperature and pressure, so that the entire system can achieve temperature balance control in large-area, multi-cabinet locations.

[0097] The control method for a computer room cooling system provided in this application embodiment has the following advantages:

[0098] 1. The controller is connected to the fast electric air volume regulating valve and the air conditioner. It can achieve precise and rapid adjustment of local air volume by comprehensively controlling the opening of the fast electric air volume regulating valve, the number of start-stop cycles of the precision air conditioner, the air outlet temperature and the air volume, so as to ensure the temperature and pressure balance of each air outlet.

[0099] 2. Pressure sensors are installed at multiple locations in the underfloor air supply duct, which can accurately monitor the pressure changes at the air supply outlets of the enclosed cold aisle in each area and adjust the air volume of the precision air conditioner in a timely manner.

[0100] 3. A manual air volume regulating valve is also installed at the end of the air outlet, that is, at the connection between the air supply channel under the floor and the air outlet. The manual air volume regulating valve adds the static air pressure balance debugging function of the system and realizes the setting of the initial state of the air outlet.

[0101] 4. Through a combination of various control strategies, the opening of the electric air volume regulating valve can be promptly corrected according to the temperature, humidity, and pressure changes in the enclosed cold aisle and the underfloor air supply duct, and the air supply volume can be adjusted quickly in real time to ensure rapid response to changes in temperature and humidity load in the enclosed cold aisle.

[0102] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0103] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A control method for a computer room cooling system, characterized in that, The computer room cooling system includes a computer room and an air conditioning room. An air conditioning room is located on at least one side of the computer room. The computer room contains multiple rows of server racks, arranged in groups of two. Between the two rows of racks in each group, a sealed, enclosed cold aisle is formed. Adjacent groups of racks form an open hot aisle. One side of each rack has an air inlet communicating with the enclosed cold aisle, and the other side has an air outlet communicating with the open hot aisle. The air conditioning room contains multiple air conditioners supplying cool air. A connecting underfloor air supply duct is located below the computer room and the air conditioning room. The cool air outlets of the air conditioners are connected to the underfloor air supply duct. The enclosed cold aisle is connected to the underfloor air supply duct via multiple air outlets. A return air vent connects the open hot aisle to the air conditioning room between the computer room and the air conditioning room. The method further includes: Obtain the first pressure difference value between the enclosed cold aisle and the underfloor air supply duct; Determine whether the first differential pressure value is less than the first differential pressure threshold. If so, increase the opening of each air outlet corresponding to the closed cold aisle. The method further includes: Obtain the second pressure value of the preset pressure detection point in the row where the air conditioner cold air outlet extends; Determine whether the difference between the maximum and minimum values ​​of the second pressure value in the current row is greater than or equal to the second differential pressure threshold. If so, increase the air volume of the air conditioner corresponding to the current row or start / stop the air conditioner corresponding to the current row. Wherein, the second differential pressure threshold is greater than the first differential pressure threshold.

2. The control method for the computer room cooling system according to claim 1, characterized in that, After determining whether the first differential pressure value is less than the first differential pressure threshold, the method further includes: When the first differential pressure value is greater than or equal to the second differential pressure threshold, the opening degree of each air outlet corresponding to the closed cold aisle is reduced.

3. The control method for the computer room cooling system according to claim 1, characterized in that, The method further includes: Obtain the first temperature value at each air outlet within each of the enclosed cold aisles; Determine whether the first temperature value is greater than or equal to the first temperature threshold. If so, increase the opening of the air outlet corresponding to the first temperature value.

4. The control method for the computer room cooling system according to claim 3, characterized in that, After increasing the opening of the air outlet corresponding to the first temperature value, the method further includes: Calculate the first average temperature of all the first temperature values ​​within each of the enclosed cold aisles; Determine whether the ratio of the first temperature value to the first average temperature is greater than or equal to the deviation threshold. If so, reduce the opening of the air outlet corresponding to the first temperature value.

5. The control method for the computer room cooling system according to claim 1, characterized in that, The method further includes: Obtain the first pressure value of several preset pressure detection points in the underfloor air supply channel; Determine whether the number of preset pressure detection points corresponding to the first pressure value that exceeds the first preset pressure range is greater than or equal to the first quantity threshold. If so, adjust the air volume of all the air conditioners.

6. The control method for the computer room cooling system according to claim 1, characterized in that, The method further includes: Determine whether the second temperature value of the underfloor air supply duct is greater than or equal to the third temperature threshold. If so, adjust the air supply temperature of all the air conditioners.

7. The control method for the computer room cooling system according to any one of claims 1-6, characterized in that, The computer room cooling system also includes a fast electric air volume regulating valve, which is located on the air outlet and is used to adjust the opening of the air outlet.

8. The control method for the computer room cooling system according to any one of claims 1-6, characterized in that, The computer room cooling system also includes: A plurality of first temperature sensors, each of which is located within the enclosed cold aisle at a position relative to the air outlet; Several pressure sensors and a second temperature sensor are respectively located in the air supply channel under the floor and arranged in an array.

9. The control method for the computer room cooling system according to any one of claims 1-6, characterized in that, Differential pressure sensors are installed between the enclosed cold aisles on both sides of the air outlet and the underfloor air supply channel, and the differential pressure sensors are connected to the controller.

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