Cooling chamber and air volume control method of cooling unit in cooling chamber

Abstract

The present invention discloses a cooling chamber and a method for controlling the air volume of a cooling unit in the cooling chamber. The cooling chamber comprises: a body, wherein a through hole is provided on the body, a receiving space is provided in the body, a cooling channel and a storage space are provided in the receiving space, and the cooling channel is connected to the outside of the body through the through hole; a wind speed sensor, wherein the wind speed sensor is provided at the through hole; a cooling unit, wherein the air outlet of the cooling unit is connected to the cooling channel, and the cooling unit is used to supply air to the cooling channel according to the detection data of the wind speed sensor, so as to cool the storage space through the cooling channel. The present invention solves the technical problems that the air volume output of the existing cooling unit is poorly synchronized with the actual demand and the fan speed control is poorly stable.

Description

Technical Field

[0001] The present invention relates to the technical field of server cabinets, and in particular to a cooling room and a method for controlling the air volume of a cooling unit in the cooling room. Background Art

[0002] At present, existing modular data centers are equipped with cabinets, power distribution units, air conditioners, water distribution units, etc. Among them, the server is set in the cabinet, and the cabinet is cooled by the air conditioner so that the server can operate in a good environment. When cooling the cabinet in the existing modular data center, the cabinet temperature is detected in the following two ways.

[0003] The first one, such as Figure 1 As shown, a temperature sensor is used to detect the cabinet temperature. Specifically, a supply air temperature sensor 5 and a return air temperature sensor 6 are installed at the supply air and return air of each air conditioner, respectively, so as to detect the supply air temperature and return air temperature of the air conditioner through the temperature sensor. By detecting the supply air temperature and return air temperature of the air conditioner, the supply and return air temperature difference of the air conditioner is calculated, and the detected temperature difference value is compared with the preset temperature difference value. If the detected temperature difference value is greater than the preset temperature difference value, the operating speed of the air conditioner fan is increased; if the detected temperature difference value is less than the preset temperature difference value, the operating speed of the air conditioner fan is reduced.

[0004] When the cabinet is cooled by the above method, there are the following disadvantages:

[0005] (1) For air conditioners with a large temperature difference between the supply and return air, the circulating air volume is increased, the air circulation space is wider, and the number of cabinet servers and heat load they bear are greater, which makes it easy for the upper limit of the cooling capacity to be reached, resulting in an increase in the supply air temperature. For air conditioners with a small temperature difference, the air volume is smaller, the circulation space is smaller, the heat load they bear becomes smaller, and they fail to play the expected cooling role.

[0006] (2) The temperature sensor has limitations when detecting temperature values, resulting in inaccurate temperature control.

[0007] (3) There is a risk of server overheating due to insufficient air volume.

[0008] The second type, such as Figures 2 to 4 As shown, a pressure difference sensor 7 is provided in the modular data center, and the pressure difference sensor 7 has a first airflow pipe 7a and a second airflow pipe 7b. Figure 2 As shown in FIG. 3 , the opening of the second airflow pipe 7b is arranged at a position close to the top plate of the cooling channel 3, and the first airflow pipe 7a is arranged outside the modular data center, and the pressure difference between the cooling channel 3 and the outside of the modular data center is detected by the pressure difference sensor 7. Figure 4In the figure, each air conditioner corresponds to a pressure difference sensor 7, the second air flow pipe 7b of the pressure difference sensor 7 is opened at the air outlet of the air conditioner fan, and the first air flow pipe 7a is opened at the air return outlet of the air conditioner, and the pressure difference of the air supply and return of the air conditioner is detected by the pressure difference sensor 7. Figures 2 to 4 The pressure difference value detected by the medium pressure difference sensor controls the air conditioner fan speed so that the detected pressure difference value is close to or equal to the set pressure difference value.

[0009] When the cabinet is cooled by the above method, there are the following disadvantages:

[0010] (1) The differential pressure sensor generally has a large range and low accuracy.

[0011] (2) Since the differential pressure sensor is installed with an air flow tube, the feedback speed of the differential pressure sensor is slow.

[0012] (3) Through Figure 2 and Figure 3 When the detection method shown is performed, due to the small pressure difference change amplitude and the low detection accuracy of the pressure difference sensor, it is impossible to provide a high-resolution control signal to the air conditioner, which in turn causes the air conditioner fan speed to fluctuate too much and the control to be unstable.

[0013] (4) Through Figure 4 When testing in the manner shown, the air conditioner supply and return air pressure difference is detected, not the pressure difference between the cooling channel and the outside of the modular data center, so the actual pressure difference between the cooling channel and the outside of the modular data center cannot be accurately obtained. In addition, when the server load changes, the air conditioner cannot make a good air volume adjustment according to the change of the server load, resulting in a mismatch between the air supply volume of the air conditioner and the air volume demand of the server.

[0014] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0015] The embodiments of the present invention provide a cooling chamber and a method for controlling the air volume of a cooling unit in the cooling chamber, so as to at least solve the technical problems that the air volume output of the existing cooling unit is poorly synchronized with the actual demand and the fan speed control is poorly stable.

[0016] According to one aspect of an embodiment of the present invention, there is provided a cooling chamber, comprising: a main body, wherein a through hole is provided on the main body, a receiving space is provided in the main body, a cooling channel and a storage space are provided in the receiving space, and the cooling channel is connected with the outside of the main body through the through hole; a wind speed sensor, wherein the wind speed sensor is provided at the through hole; and a cooling unit, wherein an air outlet of the cooling unit is connected with the cooling channel, and the cooling unit is used for supplying air to the cooling channel according to detection data of the wind speed sensor, so as to cool the storage space through the cooling channel.

[0017] According to another aspect of an embodiment of the present invention, a method for controlling the air volume of a cooling unit in a cooling chamber is also provided, including: obtaining wind speed detection data at a through hole in the cooling chamber; determining whether the wind speed detection data conforms to preset wind speed data; when the wind speed detection data does not conform to the preset wind speed data, adjusting the fan speed of the cooling unit according to the wind speed detection data, so that the cooling unit supplies air to the cooling channel according to the adjusted fan speed.

[0018] In an embodiment of the present invention, a through hole is provided on the main body, and the cooling channel and the outside of the main body are connected through the through hole. A wind speed sensor is installed on the through hole, and the airflow velocity and airflow direction at the through hole are detected by the wind speed sensor. The data detected by the wind speed sensor is transmitted to the cooling unit as a control signal, and the cooling unit controls and adjusts the fan speed according to the control signal, so that the value detected by the wind speed sensor is constant within a certain set range. In this way, the synchronous adjustment of the air supply volume of the cooling unit fan and the air volume required by the server can be achieved, and the best balance between operation safety and system energy saving can be achieved. At the same time, for operation and maintenance personnel, when the server load changes, there is no need to set the control parameters multiple times, thereby improving the efficiency of operation and maintenance management. This installation method is simple, reliable and low-cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 is a schematic diagram of a cooling chamber using a temperature sensor according to the prior art;

[0021] Figure 2 is a top view of a cooling chamber using a differential pressure sensor according to the prior art;

[0022] Figure 3 yes Figure 2 The front view of the middle cooling chamber;

[0023] Figure 4 is another schematic diagram of a cooling chamber using a differential pressure sensor according to the prior art;

[0024] Figure 5 is a top view of a first embodiment of an optional cooling chamber according to an embodiment of the present invention;

[0025] Figure 6 yes Figure 5 The front view of the middle cooling chamber;

[0026] Figure 7 yes Figure 5 Left side view of the middle cooling chamber;

[0027] Figure 8 is a schematic diagram of a second embodiment of an optional cooling chamber according to an embodiment of the present invention;

[0028] Fig. 9 is a flow chart of an optional cooling unit air volume control method for a cooling chamber according to an embodiment of the present invention;

[0029] Fig.10 is a flow chart of an optional cooling unit air volume control method for a cooling chamber according to an embodiment of the present invention;

[0030] Fig.11 is a flow chart of an optional cooling unit air volume control method for a cooling chamber according to an embodiment of the present invention;

[0031] Fig.12 It is the relationship diagram between the wind speed value fed back by the hot film wind speed sensor and the fan speed;

[0032] Fig.13 It is the relationship diagram between the wind speed value fed back by the hot wire wind speed sensor and the fan speed;

[0033] Fig.14 It is the change curve of key parameters in server load test.

[0034] The above drawings include the following reference numerals:

[0035] 1. Air conditioner; 2. Cabinet; 3. Cooling channel; 4. Server room; 5. Supply air temperature sensor; 6. Return air temperature sensor; 7. Pressure difference sensor; 7a. First air flow pipe; 7b. Second air flow pipe;

[0036] 10. Main body; 101. Frame; 102. Door; 103. Top plate; 104. Bottom plate; 11. Cooling channel; 12. Storage space; 13. Through hole; 20. Wind speed sensor; 30. Cooling unit; 40. Cabinet; 50. Controller. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] Example 1

[0040] The basic structure of the cooling chamber in this embodiment is described as follows:

[0041] According to an embodiment of the present invention, a cooling chamber is provided, such as Figures 5 to 7 As shown, the cooling chamber includes: a body 10, a wind speed sensor 20 and a cooling unit 30. Among them, a through hole 13 is provided on the body 10, and the body 10 has a storage space, and a cooling channel 11 and a storage space 12 are provided in the storage space, and the storage space 12 can be used to place items. The cooling channel 11 is connected to the outside of the body 10 through the through hole 13, and the air outlet of the cooling unit 30 is connected to the cooling channel 11. The cooling unit 30 sends cold air into the cooling channel 11, and cools the storage space 12 through the cooling channel 11. In this embodiment, the cooling chamber is specifically a modular data center, and the storage space 12 is used to place servers.

[0042] Specifically, the cooling chamber also includes a plurality of cabinets 40, and the plurality of cabinets 40 are arranged in the accommodation space, and the plurality of cabinets 40 form a storage space 12, and the server can be arranged in the plurality of cabinets 40. The space in the accommodation space except the plurality of cabinets 40 forms a cooling channel 11. In the present embodiment, the cooling channel 11 is connected with the cabinet 40 to send cold air into the cabinet 40, and the heat generated by the server in the cabinet 40 is discharged from the cabinet 40 to the outside of the body 10 through the blower of the server. Of course, in the present embodiment, the storage space 12 is not limited to the cabinet 40, and can also be other structures such as a storage room and a box. Moreover, in the present embodiment, a through hole 13 can also be provided on the cabinet 40 to connect the cooling channel 11 and the outside of the body 10.

[0043] The cooling channel 11 may be a straight channel, a curved channel, or may be composed of a main channel and a plurality of branch channels connected to the main channel. Furthermore, the cabinets 40 may be arranged in one row or two rows. For example, if the cabinets 40 are arranged in one row, the cooling channel 11 may be arranged side by side with the cabinets 40; if the cabinets 40 are arranged in two rows, the cooling channel 11 may be arranged between the two rows of cabinets 40.

[0044] like Figure 5 As shown, in this embodiment, the cooling room includes two rows of cabinets 40, and the two rows of cabinets 40 are respectively located on both sides of the cooling channel 11. Cooling the two rows of cabinets 40 through a cooling channel 11 can minimize the occupied area of ​​the overall cooling room while ensuring stable operation of the server.

[0045] The cabinet 40 can be provided as an integral structure with the body 10, or can be detachably provided on the body 10. In this embodiment, the cabinet 40 is detachably provided on the body 10, so that the number of cabinets 40 can be adjusted according to the number of servers, which is convenient for the staff to install and disassemble.

[0046] In this embodiment, the body 10 specifically includes: a frame 101, a door 102, a top plate 103 and a bottom plate 104. The frame 101 is supported as a whole, the top plate 103 is arranged above the frame 101, and the bottom plate 104 is arranged below the frame 101. An accommodation space is formed between the bottom plate 104, the top plate 103, the door 102 and the frame 101, and the cabinets 40 and the cooling unit 30 are both arranged in the accommodation space. The cooling channel 11 is formed by two rows of cabinets 40, the top plate 103, the bottom plate 104 and the doors 102 at both ends. The through hole 13 can be arranged on the top plate 103, the cabinet 40, or the doors 102 at both ends of the cooling channel 11, as long as the cooling channel 11 can be connected to the outside of the body 10.

[0047] Specifically, the top plate 103 is composed of a plurality of rotating plates, each of which is rotatably arranged above the frame 101, and each of which has an open position and a closed position. When the rotating plates are in the closed position, the plurality of rotating plates are together in a horizontal position, and the top plate 103 is closed. When the room needs to be ventilated or a fire occurs inside, the rotating plates can be placed in the open position so that the fire extinguishing equipment can extinguish the fire inside from above.

[0048] The key point of this embodiment is to set a wind speed sensor 20 in the cooling room, and control the fan speed of the cooling unit 30 according to the data detected by the wind speed sensor 20 to meet the air supply requirements of the servers in the cooling room. Specifically:

[0049] The wind speed sensor 20 is disposed at the through hole 13, and the wind speed data at the through hole 13 is detected by the wind speed sensor 20. Specifically, the airflow direction and velocity at the through hole 13 can be detected, and the fan speed of the cooling unit 30 can be controlled by the airflow direction and velocity to ensure that the server in the storage space 12 can operate under normal conditions and avoid the server temperature being too high or too low.

[0050] The cooling chamber provided in this embodiment detects the direction and velocity of the airflow at the through hole 13 through the wind speed sensor 20, and the cooling unit 30 adjusts the speed of its fan through the data detected by the wind speed sensor 20. After the adjustment, the cooling unit 30 sends the wind into the cooling channel 11 to change the static pressure of the airflow in the cooling channel 11, and then the direction and velocity of the airflow in the cooling channel 11 and the through hole 13 can be adjusted to maintain the direction and velocity of the airflow in the cooling channel 11 and the through hole 13 within a preset range. In this way, the synchronous adjustment of the air supply volume of the cooling unit 30 and the air volume required by the server can be achieved, so as to achieve the best balance between operation safety and system energy saving. At the same time, for the operation and maintenance management personnel, when the server load changes, it is only necessary to make the airflow direction and velocity at the through hole 13 reach the preset range, without the need to set the control parameters multiple times, thereby improving the efficiency of operation and maintenance management. In addition, this setting method is simple and reliable, low-cost, and easy for management personnel to operate.

[0051] The wind speed sensor 20 may be a thermal film wind speed sensor, a hot wire wind speed sensor or an impeller wind speed sensor.

[0052] Specifically, the cooling chamber also includes a controller 50. The controller 50 is electrically connected to the cooling unit 30 and the wind speed sensor 20, respectively, and the controller 50 controls the cooling unit 30 to supply air according to the detection data of the wind speed sensor 20. The controller 50 can be arranged in the cooling unit or outside the cooling unit, and data can be transmitted through a wire connection or a wireless connection. By setting the controller 50, automatic control can be achieved, reducing the workload of management personnel, and the controller 50 can adjust the speed of the cooling unit 30 in real time according to the detection data of the wind speed sensor 20 to achieve precise control. Specifically, in the present embodiment, the controller 50 is a PID controller (proportion, integral, derivative, proportional, integral, differential controller), which uniformly controls and adjusts the fan speeds of all cooling units 30 in the cooling chamber through the PID controller, so that the wind speed detection value is always constant within a preset range.

[0053] In this embodiment, the wind speed sensor 20 is installed on the ceiling of the cooling channel 11. Although it does not represent the minimum point of the micro-positive pressure of the entire cooling channel 11, the wind speed control setting value of this wind speed sensor 20 is determined by the most unfavorable (minimum) point of the air flow positive pressure in the entire cooling channel 11. After analysis, it is believed that the positions of the doors on both sides of the cooling channel 11 are farthest from the air conditioner and can be used as the most unfavorable points. In other words: when we give the preset value of the wind speed sensor 20, the position of the cooling room door can be made into a micro-positive pressure, then it can be considered that the cooling channel 11 of the entire cooling room is positive pressure. As for how to judge whether the door position of the cooling room is in a micro-positive pressure, it can be determined by the following method: open the door gap on one side (about the width of one finger), place a light paper strip (strip toilet paper) at the door gap, and observe the fluttering of the paper strip, preferably with slight fluttering from inside to outside.

[0054] The actual operation steps on site are: we first manually set the fan speed of all cooling units 30 in the cooling room to a fixed value, then slightly open one side door of the cooling room to leave a door gap (about one centimeter wide) between the two doors, and then hang a small piece of thin and soft toilet paper in the door gap to observe the fluttering direction of the toilet paper. If the direction is from outside the door to inside the door, it means that the cooling channel is under negative pressure, and the fan speed of the cooling unit needs to be increased; if the direction is from inside the door to outside the door, the fluttering angle of the paper strip is too large (or too violent), then the fan speed needs to be reduced. Until the direction is from inside the door to outside the door, and the fluttering amplitude of the paper strip is not large, we believe that the fan speed is optimal at this time. And the corresponding wind speed sensor detection value at this time is used as the preset value.

[0055] The main technical problems solved by this embodiment are:

[0056] (1) Accurate detection of changes in server air volume demand: The synchronization between the "server demand for air volume" and the "cooling unit air volume supply" can be sensed through the change in static pressure at the through-hole. For example, if supply exceeds demand, the static pressure will become higher, and if supply exceeds demand, the static pressure will become lower or even negative. Compared with the insensitivity and sluggish performance of direct measurement using wind pressure differential sensors, the inherent high precision and high sensitivity of wind speed sensors will have better performance. Through the wind speed sensor's accurate judgment of the airflow direction, it can be distinguished whether the static pressure at the through-hole is positive or negative; through the wind speed sensor's high-precision detection of the airflow velocity and fast response characteristics, it can indirectly reflect the size and degree of change of the static pressure at the through-hole.

[0057] (2) Improve the stability of fan speed control: When the pressure at the through hole changes slightly, the airflow velocity change will be more obvious and rapid. The obvious airflow change and the high precision of the detection instrument provide the cooling unit with a control signal with a higher resolution, which is conducive to the stability of the cooling unit fan speed regulation. This technology uses the above advantages of the wind speed sensor to replace the pressure difference sensor, and can achieve synchronous regulation and stable control of the cooling unit fan air supply.

[0058] Example 2

[0059] This embodiment provides a cooling chamber structure different from that of Embodiment 1, as follows:

[0060] like Figure 8 As shown, according to another embodiment of the present invention, a cooling chamber is provided, which is different from the cooling chamber provided in the above embodiment 1 only in that, in this embodiment, a plurality of through holes 13 are arranged at intervals on the body 10, and the cooling chamber includes a plurality of wind speed sensors 20, and the plurality of through holes 13 are arranged in a one-to-one correspondence with the plurality of wind speed sensors 20. The cooling channel 11 is detected by the plurality of wind speed sensors 20 to ensure that the overall pressure of the cooling channel 11 is greater than the external pressure of the body 10, so that the wind speed at each through hole 13 reaches a preset value, thereby ensuring that the cooling channel 11 as a whole meets the air supply volume requirement for the cabinet 40.

[0061] Example 3

[0062] According to Embodiment 3 of the present invention, a method for controlling the air volume of a cooling unit in a cooling chamber is also provided. Figures 9 to 11 As shown, the cooling chamber is the cooling chamber provided in the above embodiment, and the method comprises:

[0063] Step S202, obtaining wind speed detection data at the through hole of the cooling chamber.

[0064] Specifically, the wind speed detection data at the through hole can be detected by a wind speed sensor in the cooling chamber, wherein the wind speed detection data may include the airflow direction and airflow velocity.

[0065] Step S204, determining whether the wind speed detection data is consistent with the wind speed preset data.

[0066] Among them, the wind speed detection data can reflect the static pressure state of the airflow in the cooling channel and the outside of the body. When the static pressure of the cooling channel is greater than the static pressure outside the body, it is positive pressure, and when the static pressure of the cooling channel is less than the static pressure outside the body, it is negative pressure. When the cooling channel is at a slightly positive pressure, it means that the air supply volume of the cooling channel just meets the air volume requirements of the server.

[0067] Step S206, when the wind speed detection data does not meet the wind speed preset data, the fan speed of the cooling unit is adjusted according to the wind speed detection data, so that the cooling unit supplies air to the cooling channel according to the adjusted fan speed.

[0068] By using the control method provided by the embodiment of the present invention, the wind speed detection data at the through hole is detected, and the wind speed detection data can indirectly reflect the airflow pressure relationship between the cooling channel and the outside of the body, so that it can be known whether the air supply volume of the cooling unit meets the required air volume of the server in the cabinet. In the above method, the wind speed detection data can be obtained through the wind speed sensor, and the measurement is simple and easy, so that accurate control can be achieved when the cooling unit is controlled by the data, thereby improving the stability of the fan speed of the cooling unit.

[0069] like Fig.10 As shown, specifically, when the wind speed detection data does not meet the wind speed preset data, adjusting the fan speed of the cooling unit according to the wind speed detection data specifically includes:

[0070] Step S304, when the relationship between the wind speed detection data and the wind speed preset data indicates that the wind speed detection value of the body at the cooling channel is greater than the preset threshold, reducing the fan speed of the cooling unit;

[0071] Step S306, when the relationship between the wind speed detection data and the wind speed preset data indicates that the wind speed detection value of the main body at the cooling channel is less than the preset threshold, the fan speed of the cooling unit is increased.

[0072] like Fig.11 As shown, after determining whether the wind speed detection data meets the wind speed preset data, the control method further includes:

[0073] Step S208, when the wind speed detection data meets the wind speed preset data, the rotation speed of the cooling unit is maintained unchanged.

[0074] That is, first compare the wind speed detection data and the wind speed preset data. If the wind speed detection data is outside the wind speed preset data range, specifically when the wind speed detection value is greater than or less than the preset threshold, the fan speed of the cooling unit can be controlled by PID to make the wind speed detection value within the preset threshold range; if the wind speed detection data is within the wind speed preset data range, specifically when the wind speed detection value is within the preset threshold, the fan speed of the cooling unit is kept unchanged. Among them, the preset threshold can be set according to actual needs. In this embodiment, in addition to adjusting the fan speed of the cooling unit by the PID control method, the fan speed can also be adjusted by other control methods such as the linear control method.

[0075] In this embodiment, when the wind speed at the cooling channel is greater than the preset threshold, it means that the air supply of the cooling unit is much greater than the required air volume of the server. In order to avoid waste and reduce unnecessary consumption of the cooling unit, the fan speed of the cooling unit is reduced. When the wind speed at the cooling channel is less than the preset threshold, it means that the air supply of the cooling unit is less than the required air volume of the server, and the fan speed of the cooling unit needs to be increased.

[0076] In order to facilitate the understanding of the present invention, the following is described in conjunction with test data:

[0077] Testing time: 2017.02.28~2017.03.06

[0078] Test location: M209 / M201 computer room

[0079] Test scenario:

[0080] (1) Exhaust fans are placed in the cooling channel to simulate servers. The number of servers is simulated by exhaust fans to verify whether the cooling unit can operate automatically and stably.

[0081] (2) Open the cabinet blind panel and simulate the acceleration of the server fan to verify whether the cooling unit can operate automatically and stably.

[0082] (3) Open the sealed door of the cooling channel and simulate air leakage to verify whether the cooling unit can operate automatically and stably.

[0083] (4) Shut down one cooler to simulate a cooler failure to verify whether the other coolers can operate automatically and stably.

[0084] (5) Long-term operation test under real server load to verify whether the cooling unit can maintain stable operation for a long time.

[0085] Test process introduction:

[0086] During the test, the servers in the cabinets were turned off, all cabinets were equipped with blind panels, and the cooling unit included 4 air conditioners, which were spaced apart in the cooling room.

[0087] (1) Test at different fan speeds (hot film wind speed sensor)

[0088] When all blind plates are closed, the wind speed sensor values ​​of the four air conditioner fans at synchronous speed are shown in the figure below. Fig.12 .

[0089] It can be seen from the figure that the wind speed value fed back by the wind speed sensor will increase as the fan speed increases.

[0090] (2) Stability test of fan automatic adjustment (hot film wind speed sensor)

[0091] After removing some blind plates, place a light paper strip at the door gap of cooling channel 11 and observe the fluttering of the paper strip. If it flutters slightly from inside to outside, it is judged that cooling channel 11 is in positive pressure. At this time, when the wind speed at the through hole is stable at 3.5, the preset wind speed is set to 3.5.

[0092] In order to be closer to the actual situation, three variables were added during the test: removing some blind panels, placing exhaust fans in the cooling channel to simulate server fans, and turning off one of the air conditioners. The test results are shown in the table below:

[0093] Among them, AC1 to AC4 represent 4 air conditioners.

[0094]

[0095] The following conclusions can be drawn from the above table:

[0096] By comparing 1 and 2, we can conclude that: when the exhaust fan is turned on, the air volume of the simulated server's built-in fan increases, the wind speed in the cooling channel decreases, and the air conditioning fan speed increases to maintain the wind speed in the cooling channel.

[0097] By comparing 2 and 3, it can be found that as the number of blind panels removed from the cooling channel increases, the number of air leakage points in the simulated cabinet increases, the wind speed in the cooling channel decreases, and the speed of the air-conditioning fan increases to maintain the wind speed in the cooling channel.

[0098] By comparing 2 and 4, we can get: if one air conditioner is turned off, simulating an air conditioner failure or a fan failure, the wind speed in the cooling channel will decrease, and the speed of other air conditioners will increase to maintain the wind speed in the cooling channel.

[0099] From the above conclusions, it can be seen that the wind speed sensor can sensitively detect the changes in wind speed in the cooling channel and can make the air-conditioning fan stably adjusted without drastic fluctuations.

[0100] (3) Test at different fan speeds (hot wire wind speed sensor)

[0101] When the blind plate is removed by 100U, the wind speed sensor value of the four air conditioner fans at synchronous speed is shown in Fig.13 :

[0102] Conclusion: The wind speed value fed back by the wind speed sensor will increase with the increase of the fan speed, and the wind speed value is relatively stable.

[0103] (4) Stability test of fan automatic adjustment (hot wire wind speed sensor)

[0104] The same test as step (2) was performed. During the test, the comparison data of the variables was added. When the exhaust fan was turned on, the air conditioner fan speed was too high, so the set wind speed was adjusted. See the table below for details.

[0105]

[0106] The following conclusions can be drawn from the above table:

[0107] By comparing 1 and 2, it can be obtained that the number of blind plates removed from the cooling channel decreases, and the wind speed in the cooling channel increases. Therefore, the speed of the air-conditioning fan is reduced to maintain the wind speed in the cooling channel.

[0108] By comparing 3 and 4, we can conclude that: if one air conditioner is turned off, simulating an air conditioner failure or a fan failure, the wind speed in the cooling channel decreases. Therefore, the speed of other air conditioners is increased to maintain the wind speed in the cooling channel.

[0109] From the above comparison, it can be seen that the wind speed sensor can sensitively detect the changes in wind speed in the cooling channel and can stabilize the air-conditioning fan without drastic fluctuations.

[0110] (5) Server load test (hot film wind speed sensor)

[0111] After the preset wind speed stabilized at 3.5, we opened the door gap and used a light paper strip to determine the wind direction. The test found that the cooling channel was under negative pressure. Therefore, we changed the preset wind speed to 4.5.

[0112] After monitoring from 16:25 on March 3 to 00:00 on March 6, the change curves of key parameters were recorded, including fan speed, water valve opening, water supply temperature, supply air temperature and return air temperature. The fan speed was taken once every minute. During the 55h adjustment process, the fan speed was basically stable at around 55%. For specific records, see Fig.14 , where the curves from top to bottom are return air temperature, fan speed, supply air temperature, water valve opening and water supply temperature.

[0113] From the above data, it can be seen that the wind speed sensor can sensitively detect the change of wind speed in the cooling channel and the fan control is stable.

[0114] The technical solution of the present invention can bring the following beneficial effects:

[0115] (1) Safety: Real-time and accurate detection of changes in the air volume demand of the server for the cooling channel to achieve synchronous air volume supply. Specifically, it can ensure that in any scenario, the total air supply of the air conditioner is slightly greater than or equal to the air volume required by the server, thereby ensuring the safe operation of the server.

[0116] (2) Stability: The fan speed will not change frequently during load maintenance and load change operation.

[0117] (3) High efficiency: You only need to set the parameters once to ensure automatic adjustment of the air volume during the server load increase or decrease, thereby improving the efficiency of operation and maintenance management.

[0118] (4) Energy saving: All fans maintain the same speed, and the total energy consumption of the fans is minimized while meeting the air volume requirements.

[0119] (5) Save money: simple structure, easy installation and low construction cost.

[0120] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0121] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0122] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0123] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0124] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0125] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0126] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A cooling chamber, characterized in that: The cooling chamber comprises: A body (10), wherein a through hole (13) is provided on the body (10), a receiving space is provided in the body (10), a cooling channel (11) and a storage space (12) are provided in the receiving space, and the cooling channel (11) is connected to the outside of the body (10) through the through hole (13); A wind speed sensor (20), wherein the wind speed sensor (20) is arranged at the through hole (13); a cooling unit (30), wherein an air outlet of the cooling unit (30) is in communication with the cooling channel (11), and the cooling unit (30) is used to supply air to the cooling channel (11) according to detection data of the wind speed sensor (20), so as to cool the storage space (12) through the cooling channel (11); The cooling unit (30) is arranged in the accommodating space, and the through hole (13) is arranged at an end of the cooling channel (11) away from the cooling unit (30), or the through hole (13) is arranged in the middle of the cooling channel (11).

2. The cooling chamber according to claim 1, characterized in that The cooling chamber also includes: A controller (50), wherein the controller (50) is electrically connected to the cooling unit (30) and the wind speed sensor (20), respectively, and the controller (50) is used to control the air supply of the cooling unit (30) according to the detection data of the wind speed sensor (20).

3. The cooling chamber according to claim 1, characterized in that A plurality of through holes (13) are arranged at intervals on the body (10); the cooling chamber comprises a plurality of wind speed sensors (20); and the plurality of through holes (13) and the plurality of wind speed sensors (20) are arranged in a one-to-one correspondence.

4. The cooling chamber according to claim 1, characterized in that The cooling chamber also includes: A plurality of cabinets (40) are arranged in the accommodating space, the plurality of cabinets (40) form the storage space (12), and the space in the accommodating space excluding the plurality of cabinets (40) forms the cooling channel (11).

5. The cooling chamber according to claim 4, characterized in that The cabinet (40) is detachably arranged on the body (10).

6. The cooling chamber according to any one of claims 1 to 5, characterized in that The body (10) comprises: Frame (101); door(102); A top plate (103) disposed above the frame (101); A bottom plate (104) is arranged below the frame (101), and the accommodation space is formed between the bottom plate (104), the door (102), the top plate (103) and the frame (101).

7. The cooling chamber according to claim 6, characterized in that The top plate (103) includes a plurality of rotating plates, each of which is rotatably disposed above the frame (101), and each of which has an open position and a closed position.

8. The cooling chamber according to any one of claims 1 to 5, characterized in that The wind speed sensor (20) comprises a hot film wind speed sensor, a hot wire wind speed sensor or an impeller wind speed sensor.

9. A method for controlling the air volume of a cooling unit in a cooling room, characterized in that: The cooling chamber is a cooling chamber according to any one of claims 1 to 8, and the control method comprises: Acquiring wind speed detection data at the through hole of the cooling chamber; Determining whether the wind speed detection data conforms to the wind speed preset data; When the wind speed detection data does not conform to the wind speed preset data, the fan speed of the cooling unit is adjusted according to the wind speed detection data, so that the cooling unit supplies air to the cooling channel according to the adjusted fan speed.

10. The control method according to claim 9, characterized in that: When the wind speed detection data does not meet the wind speed preset data, adjusting the fan speed of the cooling unit according to the wind speed detection data specifically includes: When the relationship between the wind speed detection data and the wind speed preset data indicates that the wind speed detection value of the body at the cooling channel is greater than a preset threshold, reducing the fan speed of the cooling unit; When the relationship between the wind speed detection data and the wind speed preset data indicates that the wind speed detection value of the main body at the cooling channel is less than a preset threshold, the fan speed of the cooling unit is increased.

11. The control method according to claim 9, characterized in that: Adjusting the fan speed of the cooling unit according to the wind speed detection data specifically includes: Linear control is performed according to the wind speed detection data to adjust the fan speed of the cooling unit.

12. The control method according to claim 9, characterized in that: After determining whether the wind speed detection data meets the wind speed preset data, the control method further includes: When the wind speed detection data meets the wind speed preset data, the fan speed of the cooling unit is maintained unchanged.

13. The control method according to claim 9, characterized in that: The wind speed detection data includes airflow direction and airflow speed.

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