Inter-column air conditioner control method and device for controlling temperature field of machine room through flow velocity field

Abstract

The invention discloses an inter-column air conditioner control method and device for controlling a machine room temperature field through a flow velocity field, and solves the problem that in the prior art, a temperature field model is established depending on external parameters to adjust an air conditioning unit, and the adjustment effect is poor due to the fact that the influence of sensor positions and parameter accuracy is large. The method comprises the steps of determining a flow velocity field correlation factor of each air conditioner and a correlated air conditioner; acquiring a first candidate air conditioner group with overhigh return air temperature, and selecting an air conditioner to perform rotation speed limit value adjustment; and obtaining a second candidate air conditioner group with too low return air temperature, and selecting the air conditioner with the lowest return air temperature to be closed according to the judgment of the air supply temperature. And the air conditioner needing to be adjusted is adjusted every set time interval. According to the method, the influence relation of the flow field potential functions among the air conditioners is established, the hot air flow velocity field is changed by changing the rotating speed of each air conditioner fan, the temperature field is controlled, each air conditioner fan works near the optimal fan rotating speed, the heat exchange capacity of an existing heat exchanger is fully utilized, and the purpose of saving energy is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning control, and in particular to a row-to-row air conditioning control method and device for controlling a temperature field of a machine room through a flow velocity field. Background Art

[0002] As general computing data centers develop into intelligent computing data centers, the power consumption of single cabinets is getting higher and higher. The use of inter-row air conditioners and closed heat channels in data centers is becoming more and more popular. How to make the coordination between the inter-row air conditioning units in the module better, the energy efficiency higher, and the air flow organization more reasonable has become the goal of energy saving pursued by intelligent computing centers. People have also thought of many ways to control the inter-row air conditioners, most of which control the output of the air conditioning units according to the temperature field of the computer room.

[0003] In the existing technology, multiple temperature sensors are used to collect the real temperature field, calculate the cooling capacity demand of the air-conditioning area, determine the number of air conditioners turned on and the air conditioner output; and obtain the power parameters and equipment heat of the air conditioner to calculate the air conditioner opening time and closing time; in addition, the correlation between the air conditioner and the cabinet or space point is established to calculate the number of air conditioners turned on and the processing status. At present, these methods have the following defects: 1. Ignoring the dynamic change of power consumption of the computer room cabinets; 2. Only the temperature changes of the surface temperature field are seen, without considering in depth that the temperature field changes with the flow velocity field; 3. The existing technologies all use a large number of temperature and pressure sensors outside the computer room air-conditioning unit, cabinet IT power consumption and other external parameters to establish a temperature field model, associate the air conditioner with the temperature point or cabinet, and then adjust the air-conditioning unit. The sensor layout position and parameter accuracy have a great impact on the adjustment, and the adjustment effect is relatively poor.

[0004] For example, a row-to-row air conditioning module has 20 cabinets. The power consumption of the 20 cabinets will fluctuate at different times, so the actual operation is uneven. The air conditioners in the cabinets with high power consumption will run at full speed, while the air conditioners in the cabinets with low power consumption will be idle. As a result, the high-power cabinets in the same module are conducive to the air return port inhalation area, and the air conditioners will run at high speed, while other areas will run at low speed or stop running, resulting in some being exhausted and some being idle, resulting in a waste of idle air conditioning heat exchange capacity. Summary of the invention

[0005] The present invention mainly solves the problem that the prior art relies on external parameters to establish a temperature field model to adjust the air-conditioning unit, which is greatly affected by the sensor position and parameter accuracy, resulting in poor adjustment effect. A method and device for controlling the inter-row air-conditioning control of the computer room temperature field through a flow velocity field is provided.

[0006] The above technical problem of the present invention is mainly solved by the following technical solution: a method for controlling the temperature field of a machine room through a flow velocity field, comprising the following steps: S1. Determine the associated air conditioner of each air conditioner and the velocity field correlation factor with the associated air conditioner; S2. Obtain the first candidate air conditioner group with too high return air temperature, select the first air conditioner with high fan speed, obtain the first air conditioner with the largest fan speed, select the associated air conditioner with the largest velocity field correlation factor and low fan speed, increase the lower limit of the fan speed of the associated air conditioner, and reduce the upper limit of the fan speed of the first air conditioner; S3. Obtain the second candidate air conditioning group with too low return air temperature, and select the air conditioning with the lowest return air temperature to shut down according to the judgment of the supply air temperature.

[0007] S4. Adjust the air conditioner that needs to be adjusted at every set time interval.

[0008] The present invention is based on the inherent flow field potential function characteristics of each air conditioner, without the help of other sensors other than the air conditioning unit itself, by establishing the influence relationship of the flow field potential function between each air conditioner, by monitoring the return air temperature, supply air temperature, fan speed and other operating parameters inside the air conditioning unit and the upper and lower limits of these parameters, the upper and lower limits of the wind speed of each air conditioner fan to be turned on are adjusted, and the hot air flow velocity field is changed by changing the fan speed of each air conditioner to achieve the control of the temperature field, so that the hot air is distributed more evenly to each air conditioning unit to be turned on, so that the fan of each air conditioning unit works near the optimal fan speed, making full use of the heat exchange capacity of the existing heat exchanger, achieving the purpose of energy saving, and solving the problem of local overheating. And further, it can judge whether the air conditioning unit is operating in a pathological state, issue an early warning, and improve the safety of system operation. The inherent flow field potential function characteristics of the return air of the inter-row air conditioner are: φ = Q / (2π)lnr, where φ is the potential function, Q is the flow rate, and r is the effective radius.

[0009] As a preferred solution, the velocity field correlation factor is determined, including: Determine the geometric center of each air conditioner return outlet; Determine the return air velocity V when each air conditioner is running separately min The distance R between the point and the geometric center max ; The current air conditioner is the main air conditioner. The geometric center of the main air conditioner is the center of the circle. max Draw a circle for the radius and get other air conditioners in the circle as associated air conditioners; Take the geometric center of the main air conditioner as the center of the circle, draw a circle through the geometric center of the associated air conditioner, and obtain the radius R i ; Calculate the velocity field correlation factor X i =R max / R i .

[0010] In this scheme, the velocity field correlation factor of each air conditioner, i.e. the main air conditioner and its associated air conditioner, is calculated separately. First, the return air velocity V of each air conditioner when it is running is determined. min The distance R between the point and the geometric center of the return air max , taking the currently calculated air conditioner as the main air conditioner, and the geometric center of the main air conditioner as the center of the circle, R max Draw a circle with radius R, obtain other air conditioners in the circle, define them as the associated air conditioners of the current main air conditioner, calculate the velocity field correlation factor between the main air conditioner and each associated air conditioner, and define it as the spacing R max With radius R i The quotient of velocity field correlation factor X i The larger the value is, the greater the correlation factor of the associated air conditioner on the velocity field of the main air conditioner is, and the greater the impact on the velocity field of the main air conditioner unit is. On the contrary, the smaller the correlation factor of the associated air conditioner on the velocity field of the main air conditioner is, the smaller the impact on the velocity field of the main air conditioner unit is. After determining the velocity field correlation factor of each air conditioner and the associated air conditioner, store it in the velocity field correlation factor storage area in the information storage module.

[0011] As a preferred solution, an upper limit value of the return air temperature of the air conditioner is set to determine whether the return air temperature of the air conditioner is greater than the upper limit value of the return air temperature. If yes, obtain these air conditioners to obtain the first candidate air conditioner group; if no, go to step S3.

[0012] Step S2 determines whether the flow velocity field in the high temperature zone needs to be adjusted. The number M of inter-row air conditioners whose return air temperature is greater than the upper limit of the return air temperature is determined. If M≥1, that is, there are inter-row air conditioners whose return air temperature is greater than the upper limit of the return air temperature, it means that the flow velocity field in the high temperature zone needs to be adjusted, and the adjustment step is entered. If M=0, that is, there are no inter-row air conditioners whose return air temperature is greater than the upper limit of the return air temperature, it means that the flow velocity field in the high temperature zone does not need to be adjusted, and the step S3 is entered.

[0013] As a preferred solution, for the first candidate air-conditioning group, an air-conditioning whose fan speed is greater than the middle speed and less than or equal to the upper speed limit is selected as the first air-conditioning, and the middle speed is the average of the upper speed limit and the lower speed limit.

[0014] Obtain the upper and lower limits of the fan speed of each air conditioner. Select the first number of air conditioners with high fan speed from the first candidate air conditioner group. The high fan speed is judged as the fan speed being greater than the intermediate speed and less than or equal to the upper limit of the speed, wherein the intermediate speed is the average of the upper limit of the speed and the lower limit of the speed, that is, the sum of the upper limit of the speed and the lower limit of the speed divided by 2. The air conditioner that meets the conditions is the first air conditioner. If the number of first air conditioners K≥1, that is, there is a first air conditioner, then enter the adjustment step. If the number of first air conditioners K=0, that is, there is no first air conditioner, then no adjustment is performed and enter step S3.

[0015] As a preferred solution, the first air conditioner with the largest fan speed is selected from the first air conditioners to obtain its associated air conditioners; the associated air conditioners are sorted in descending order according to the flow velocity field correlation factor, and are sorted in descending order according to the fan speeds of the associated air conditioners; Obtain the associated air conditioner whose fan speed is less than the middle speed and whose velocity field correlation factor is the largest. If there are multiple associated air conditioners with the same velocity field correlation factor, select the associated air conditioner with the smallest fan speed.

[0016] This solution selects the first air conditioner with the largest fan speed from the first air conditioners, obtains the corresponding associated air conditioners based on the air conditioner, and selects the associated air conditioner that meets the conditions from these associated air conditioners, the condition is that the fan group speed is less than the middle speed and the velocity field correlation factor is the largest, where the middle speed is the sum of the upper limit and the lower limit of the air conditioner fan speed divided by 2. If there are multiple associated air conditioners with the same velocity field correlation factor, the associated air conditioner with the smallest fan speed is selected. The associated air conditioners are sorted by the velocity field correlation factor and the fan speed, respectively, to facilitate the subsequent judgment step.

[0017] As a preferred solution, a unit adjustment value is set to increase the lower limit value of the selected associated air-conditioning fan speed by the unit adjustment value, and at the same time reduce the upper limit value of the corresponding first air-conditioning fan speed by the unit adjustment value.

[0018] After selecting the associated air conditioner that meets the conditions, the lower limit of the fan speed of the associated air conditioner is increased by a unit adjustment value, and the upper limit of the fan speed of the corresponding main air conditioner is decreased by a unit adjustment value. The adjustment signals are stored in the output area of ​​the information storage module respectively, and the adjustment signals correspond to the air conditioner number. At set intervals, the air conditioner number to be adjusted and the corresponding adjustment signal are read from the output area of ​​the information storage module, and the adjustment command is sent to the air conditioner to be adjusted.

[0019] As a preferred solution, a lower limit value of the return air temperature of the air conditioner is set to determine whether the return air temperature of the air conditioner is lower than the lower limit value of the return air temperature. If yes, obtain these air conditioners to obtain the second candidate air conditioner group; if no, return to step S2.

[0020] Step S3 obtains the number N of air conditioners whose return air temperature is lower than the lower limit of the return air temperature, and determines the number N. If N≥1, that is, there are air conditioners whose return air temperature is lower than the lower limit of the return air temperature, obtain these air conditioners to form the second candidate air conditioner group, and perform the selection and shutdown operation. If N=0, that is, there are no air conditioners whose return air temperature is lower than the lower limit of the return air temperature, then return to step S2 and perform a new round of debugging operations.

[0021] As a preferred solution, after obtaining the second candidate air-conditioning group, it is determined whether the fan speeds of all the second candidate air-conditioners are running at the lowest speed. If so, the air-conditioning with the lowest return air temperature is selected and turned off based on the supply air temperature. If not, it is prompted that the fan speed setting is incorrect.

[0022] After obtaining the second candidate air-conditioning group, the fan speed of all the second candidate air-conditioners is judged to determine whether they are all running at their lowest fan speed. If all the air-conditioners are running at their lowest fan speed, the air-conditioner with the lowest return air temperature is subsequently selected for shutdown based on the supply air temperature. If any of the air-conditioners is not running at the lowest fan speed, a prompt that the fan speed setting is incorrect is issued to the corresponding air-conditioner, prompting the staff to correct the fan speed setting.

[0023] As a preferred solution, a supply air temperature limit is set to determine whether the supply air temperatures of all air conditioners in the second candidate air conditioner group are lower than the supply air temperature limit. If so, select the air conditioner with the lowest return air temperature and shut it down; If not, select the air conditioners whose supply air temperature is higher than the supply air temperature limit and shut them down, prompting these air conditioners of cooling failure, and select the air conditioner with the lowest return air temperature from the remaining air conditioners below the supply air temperature limit and shut them down.

[0024] This solution selects the air conditioner with the lowest return air temperature to be turned off based on the judgment of the supply air temperature, specifically including, when the air conditioners in the second candidate air conditioner group meet the condition of running at the lowest fan speed, judging whether the supply air temperatures of all the second candidate air conditioners are lower than the supply air temperature limit, if so, selecting the air conditioner with the lowest return air temperature among the second candidate air conditioners and turning it off, and returning to step S2; if not, turning off the second candidate air conditioner with a supply air temperature higher than the supply air temperature limit, and selecting the air conditioner with the lowest return air temperature from the remaining air conditioners, i.e., the air conditioners with a supply air temperature lower than the supply air temperature limit, and turning it off, and returning to step S2. This cycle is repeated until the fan speeds of all air conditioners are higher than the set minimum fan speed.

[0025] A row-to-row air conditioning control device for controlling a temperature field in a machine room through a flow velocity field, comprising: A velocity field correlation factor calculation module calculates the velocity field correlation factor of each air conditioner and its associated air conditioner; An information storage module stores the air-conditioning flow field correlation factor, air-conditioning status information, and the adjustment signal of the air-conditioning to be adjusted; an air-conditioning status reading module reads the status information of each air-conditioning and stores it in the information storage module; The control module reads the velocity field correlation factor of the air conditioner and the air conditioner status information, selects the air conditioner in the first candidate air conditioner group to adjust the speed limit, and selects the air conditioner with the lowest return air temperature in the second candidate air conditioner group according to the judgment of the supply air temperature to turn it off; the control output module reads the adjustment signal of the air conditioner to be adjusted at each set time interval and adjusts the air conditioner.

[0026] Therefore, the advantages of the present invention are: based on the inherent flow field potential function characteristics of each air conditioner, without the help of other sensors other than the air conditioning unit itself, by establishing the influence relationship of the flow field potential function between each air conditioner, by monitoring the return air temperature, supply air temperature, fan speed and other operating parameters inside the air conditioning unit and the upper and lower limits of these parameters, the upper and lower limits of the wind speed of each air conditioning fan to be turned on are adjusted, and the hot air flow rate field is changed by changing the fan speed of each air conditioning unit to achieve the control of the temperature field, so that the hot air is distributed more evenly to each air conditioning unit to be turned on, so that the fan of each air conditioning unit works near the optimal fan speed, and the heat exchange capacity of the existing heat exchanger is fully utilized to achieve the purpose of energy saving, while solving the problem of local overheating. And further, it can judge whether the air conditioning unit is operating in a pathological state, issue an early warning, and improve the safety of system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic flow chart of the method of the present invention.

[0028] Figure 2 Schematic diagram of the distribution structure of the air-conditioning unit exemplified in the embodiment of the present invention.

[0029] Figure 3 This is a power consumption distribution diagram of an air conditioning unit exemplified in Embodiment 2 of the present invention.

[0030] Figure 4 This is a power consumption distribution diagram of an air conditioning unit exemplified in Embodiment 3 of the present invention.

[0031] Figure 5 It is a structural block diagram of the device of the present invention.

[0032] 1-control module 2-information storage module 3-air conditioning status reading module 4-flow velocity field correlation factor calculation module 5-control output module 6-IT equipment cabinet 7-air conditioning 8-hot channel. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0034] Embodiment 1: This embodiment provides a row-to-row air conditioning control method for controlling the temperature field of a computer room through a flow rate field. Figure 1As shown, the following steps are included: S1. Determine the associated air conditioner of each air conditioner, and the flow velocity field correlation factor with the associated air conditioner.

[0035] As a preferred solution of this embodiment, the process includes: S11. Determine the geometric center of each air conditioner return outlet; S12. Determine the return air velocity V when each air conditioner is running alone min The distance R between the point and the geometric center max ; S13. The current air conditioner is the main air conditioner. The geometric center of the main air conditioner is the center of the circle. R max Draw a circle for the radius and get other air conditioners in the circle as associated air conditioners; S14. Take the geometric center of the main air conditioner as the center of the circle, and draw a circle through the geometric center of the associated air conditioner to obtain the radius R i ; Calculate the velocity field correlation factor X i =R max / R i .

[0036] Specifically, this step calculates the velocity field correlation factor of each air conditioner and its associated air conditioner. When one air conditioner is used as the calculation object, the air conditioner is defined as the main air conditioner. First, determine the return air velocity V of each air conditioner when it is running. min The distance R between the point and the geometric center of the return air max , taking the currently calculated air conditioner as the main air conditioner, and the geometric center of the main air conditioner as the center of the circle, R max Draw a circle with radius R, obtain other air conditioners in the circle, define them as the associated air conditioners of the current main air conditioner, calculate the velocity field correlation factor between the main air conditioner and each associated air conditioner, and define it as the spacing R max With radius R i The quotient of velocity field correlation factor X i The larger the value is, the greater the correlation factor of the associated air conditioner on the velocity field of the main air conditioner, and the greater the impact on the velocity field of the main air-conditioning unit. Conversely, the smaller the correlation factor of the associated air conditioner on the velocity field of the main air-conditioning, the smaller the impact on the velocity field of the main air-conditioning unit.

[0037] Determine the velocity field correlation factor between each air conditioner and the associated air conditioner, and store it in the velocity field correlation factor storage area in the information storage module. Sort the velocity field correlation factors between each main air conditioner that can operate normally and its associated air conditioner from large to small. The faulty air conditioner is not included in the velocity field correlation factor sorting of the main air conditioner. The velocity field correlation factor sorting of other air conditioners also does not include the faulty air conditioner in the calculation. It will be included in the normal sorting after it returns to normal operation.

[0038] The control method for each air-conditioning unit is to use the supply air temperature to control the cooling output. When the supply air temperature is lower than the set value, the cooling capacity is reduced, such as reducing the opening of the chilled water valve or lowering the opening of the expansion valve. The return air temperature controls the fan speed. When the return air temperature is higher than the set value, the fan speed is increased, and when the return air temperature is lower than the set value, the fan speed is reduced.

[0039] S2. Obtain the first candidate air-conditioning group with too high return air temperature, select the first air-conditioning with high fan speed, obtain the first air-conditioning with the largest fan speed, select the associated air-conditioning with the largest correlation factor with its flow velocity field, increase the lower limit of the fan speed of the associated air-conditioning, and reduce the upper limit of the fan speed of the first air-conditioning.

[0040] As a preferred solution of this embodiment, the specific process includes: First run the initialization before the debugging steps are performed.

[0041] After the device receives the operation command, it starts the initialization operation and starts all the inter-row air conditioners in the inter-row air conditioner module. It reads the information of each air conditioner, including the start and stop status of the air conditioner, whether it is faulty, as well as the return air temperature, supply air temperature, fan speed, upper and lower limits of return air temperature, supply air temperature limit, and upper and lower limits of fan speed.

[0042] S21. Determine whether the return air temperature of an air conditioner is greater than the upper limit of the return air temperature. If yes, obtain these air conditioners to obtain the first candidate air conditioner group; if no, go to step S3.

[0043] Specifically, this step determines whether the flow velocity field in the high temperature zone needs to be adjusted, calculates the number M of inter-row air conditioners whose return air temperature is greater than the upper limit of the return air temperature, and then determines the number M. If M≥1, that is, there are inter-row air conditioners whose return air temperature is greater than the upper limit of the return air temperature, it means that the flow velocity field in the high temperature zone needs to be adjusted, and enters the adjustment step. If M=0, that is, there are no inter-row air conditioners whose return air temperature is greater than the upper limit of the return air temperature, it means that the flow velocity field in the high temperature zone does not need to be adjusted, and enters step S3.

[0044] S22. For the first candidate air conditioner group, select an air conditioner whose fan speed is greater than the intermediate speed and less than or equal to the upper speed limit as the first air conditioner. The intermediate speed V is the average of the upper speed limit and the lower speed limit, V = (v max +v min ) / 2,v max is the upper limit of fan speed, v min The lower limit of the fan speed.

[0045] This step is to determine whether there is a first air conditioner that meets the high fan speed condition, specifically including selecting the first air conditioner number K with high fan speed from the first candidate air conditioner group, the condition of the high fan speed is that the fan speed is greater than the intermediate speed and less than or equal to the upper limit of the speed, and the first air conditioner is obtained after the above conditions are met. If the first air conditioner number K≥1, that is, there is a first air conditioner, then enter step S23, if the first air conditioner number K=0, that is, there is no first air conditioner, then no adjustment is made, and enter step S3.

[0046] S23. Selecting the first air conditioner with the largest fan speed from the first air conditioners, and obtaining its associated air conditioners; The associated air conditioners are sorted in descending order according to the velocity field correlation factor, and are sorted in descending order according to the fan speed of the associated air conditioners; the sorting is for the convenience of the subsequent judgment step.

[0047] Obtain the associated air conditioner whose fan speed is less than the middle speed and whose velocity field correlation factor is the largest. If there are multiple associated air conditioners with the same velocity field correlation factor, select the associated air conditioner with the smallest fan speed.

[0048] Specifically, this step selects the first air conditioner with the largest fan speed from the first air conditioners, obtains the associated air conditioners of the current first air conditioner according to the associated air conditioner information of each main air conditioner obtained in step S1 and the flow field association factor information, and then selects the associated air conditioner that meets the conditions that the fan speed is less than the middle speed and the flow field association factor is the largest from these associated air conditioners; if there are multiple associated air conditioners with the same flow field association factor, selects the associated air conditioner with the smallest fan speed.

[0049] S24. Set a unit adjustment value ΔV, increase the selected lower limit value of the associated air-conditioning fan speed by the unit adjustment value, and simultaneously decrease the corresponding upper limit value of the first air-conditioning fan speed by the unit adjustment value.

[0050] Specifically, after selecting the associated air conditioner that meets the conditions, the lower limit of the fan speed of the associated air conditioner is increased by a unit adjustment value ΔV, and the adjustment signal is stored in the output area of ​​the information storage module; at the same time, the upper limit of the fan speed of the corresponding main air conditioner is lowered by a unit adjustment value ΔV, and the adjustment signal is stored in the output area of ​​the information storage module, and the adjustment signal corresponds to the air conditioner number. This round of debugging operation is completed, and after an interval of Y minutes, it returns to step S21 to perform a new round of debugging operation.

[0051] S3. Obtain the second candidate air conditioning group with too low return air temperature, and select the air conditioning with the lowest return air temperature to shut down according to the judgment of the supply air temperature.

[0052] As a preferred solution of this embodiment, it specifically includes: S31. Determine whether the return air temperature of an air conditioner is lower than the lower limit of the return air temperature. If yes, obtain these air conditioners to obtain the second candidate air conditioner group; if no, return to step S21.

[0053] Specifically, this step obtains the number N of air conditioners whose return air temperature is lower than the lower limit of the return air temperature, and then determines the number N. If N≥1, that is, there are air conditioners whose return air temperature is lower than the lower limit of the return air temperature, these air conditioners are obtained to form the second candidate air conditioner group, and the process goes to step 32 to continue the debugging operation. If N=0, that is, there are no air conditioners whose return air temperature is lower than the lower limit of the return air temperature, the process returns to step S2 and performs a new round of debugging operations.

[0054] S32. After obtaining the second candidate air conditioner group, determine whether the fan speeds of all second candidate air conditioners are running at the lowest speed. If yes, go to step S33; if no, prompt that the fan speed setting is wrong and return to step S21.

[0055] After obtaining the second candidate air-conditioning group, it also includes judging the fan speed of all the second candidate air-conditioners to determine whether they are all running at their lowest fan speed. If all air-conditioners are running at their lowest fan speed, the air-conditioner with the lowest return air temperature is subsequently selected for shutdown based on the judgment of the supply air temperature. If any of the air-conditioners is not running at the lowest fan speed, a prompt that the fan speed setting is wrong is issued to the corresponding air-conditioner, prompting the staff to correct the fan speed setting, and returning to step S21. If the wind speed is adjusted, a new round of debugging operation is performed on the adjusted fan.

[0056] S33. Determine whether the air supply temperatures of all air conditioners in the second candidate air conditioner group are lower than the air supply temperature limit. If so, select the air conditioner with the lowest return air temperature and shut it down; If not, select the air conditioner whose supply air temperature is higher than the supply air temperature limit and turn it off, and select the air conditioner with the lowest return air temperature from the remaining air conditioners whose return air temperature is lower than the supply air temperature limit and turn it off.

[0057] This step selects the air conditioner with the lowest return air temperature to be turned off based on the judgment of the supply air temperature. Specifically, when the air conditioners in the second candidate air conditioner group meet the condition of running at the lowest fan speed, it is judged whether the supply air temperatures of all the second candidate air conditioners are lower than the supply air temperature limit. If so, the air conditioner with the lowest return air temperature among the second candidate air conditioners is selected and turned off, and the process returns to step S21 for a new round of debugging operations. If not, the second candidate air conditioner with a supply air temperature higher than the supply air temperature limit is turned off, and the air conditioner with the lowest return air temperature is selected from the remaining air conditioners, i.e., the air conditioners with a supply air temperature lower than the supply air temperature limit, and turned off, and the process returns to step S21 for a new round of debugging operations. This process continues until the fan speeds of all air conditioners are greater than the set minimum fan speed.

[0058] S4. Adjust the air conditioner that needs to be adjusted at every set time interval.

[0059] During the entire debugging process, the control output module reads the air conditioner number and the corresponding adjustment signal that need to be adjusted from the output area of ​​the information storage module at set intervals S, and sends an adjustment command to the air conditioner unit that needs to be adjusted.

[0060] The present invention is based on the inherent flow field potential function characteristics of each air conditioner, without the help of other sensors other than the air conditioner unit itself, by establishing the influence relationship of the flow field potential function between each air conditioner, by monitoring the return air temperature, supply air temperature, fan speed and other operating parameters inside the air conditioner unit and the upper and lower limits of these parameters, the upper and lower limits of the wind speed of each air conditioner fan to be turned on are adjusted, and the hot air flow rate field is changed by changing the fan speed of each air conditioner to achieve the control of the temperature field, so that the hot air is distributed more evenly to each air conditioner unit to be turned on, so that the fan of each air conditioner unit works near the optimal fan speed, fully utilizing the heat exchange capacity of the existing heat exchanger, achieving the purpose of energy saving, and solving the problem of local overheating. And further, it can judge whether the air conditioner unit is operating in a pathological state, issue an early warning, and improve the safety of system operation.

[0061] Embodiment 2: This embodiment discloses an implementation method of controlling the temperature field of a computer room through a flow rate field using an actual example operation. Figure 2 The figure shows a data room module using row-to-row air conditioners, including IT equipment cabinets 1 and row-to-row air conditioners 2. The data room module is arranged in two rows opposite to each other, with a hot channel 3 in the middle. Both ends of the hot channel are closed. Each row is arranged with equipment cabinets between air conditioners. The number of equipment cabinets in the intervals is the same, and the air conditioners in the two rows are arranged in a staggered manner. A total of 32 8KW cabinets are arranged, with an IT power consumption of 256KW and an air conditioning load of 268KW. Ten row-to-row air conditioners are arranged, 8 main and 2 standby. The rated cooling capacity of a single row-to-row air conditioner is 35KW, and the total cooling capacity is 280KW. The dimensions of the cabinets and air conditioners are 1200mm (length) * 600mm (width) * 2200mm (height). The dimensions of the return air outlet of the row-to-row air conditioner are 550mm * 2100mm, and the rated air volume is 9000m 3 / h.

[0062] Determine the associated air conditioners of each air conditioner and the velocity field correlation factor with the associated air conditioners. Obtain the velocity field correlation factor between air conditioner A and other air conditioners, and calculate the minimum return air velocity V according to fluid mechanics. min = 0.005m / s velocity field radius R max =2.21m. The geometric center of the return air outlet of the inter-row air conditioner is the geometric center of the return air outlet of the A air conditioner as the center of the circle. max =2.21m as the radius of the circle is F air conditioner and G air conditioner, respectively to find the radius R iThe velocity field correlation factors are 1.34m and 2.16m. The velocity field correlation factors are calculated to be 2.21 / 1.34=1.65 and 2.21 / 2.16=1.02 respectively. Similarly, the velocity field correlation factors of other air conditioners corresponding to the associated air conditioners are calculated, as shown in the following table: Table of correlation factors of flow rate fields between main air conditioners and associated air conditioners The control method of the inter-row air conditioning unit is to control the cooling output with the supply air temperature, that is, to control the opening of the water valve. The supply air temperature limit is 25℃±2℃. When the supply air temperature is higher than 27℃, an alarm is triggered. When it is higher than 25℃, the water valve opening is increased. When it is lower than 25℃, the water valve opening is reduced. The return air temperature controls the fan speed. The return air temperature limit is set to 36.5℃. When the return air temperature is higher than 36.5℃, the fan speed is increased. When the return air temperature is lower than 36.5℃, the fan speed is reduced. The alarm limit is 38℃.

[0063] After receiving the operation command, the device starts the initialization operation and starts all the inter-row air conditioners in the inter-row air conditioner module. Read the information of each air conditioner, including the air conditioner start and stop status, whether it is faulty, as well as the return air temperature, supply air temperature, fan speed, upper and lower limits of return air temperature, supply air temperature limit of 25℃, minimum fan speed of 30%, and maximum fan speed of 80%.

[0064] The air conditioner is arranged to generate heat evenly with an average of 8KW per cabinet. When the cabinet is actually running, the power consumption of the cabinet is unevenly distributed. Assuming that the current cabinet power consumption is Figure 3 As shown, it can be seen that the actual operating power consumption of the cabinets of air conditioners B and I is relatively large, and their return air temperatures exceed the upper limit.

[0065] Determine whether the return air temperature of any air conditioner is greater than the upper limit of the return air temperature. According to the current example, air conditioner G and air conditioner I in the figure are obtained as the first candidate air conditioners.

[0066] For the first candidate air-conditioning group, an air-conditioning whose fan speed is greater than the middle speed and less than or equal to the upper speed limit is selected as the first air-conditioning. In this example, air-conditioning G and air-conditioning I meet the conditions and are both selected as the first air-conditioning.

[0067] The first air conditioner with the largest fan speed is selected from the first air conditioners, which is air conditioner G in this example, and is used as the main air conditioner. All its associated air conditioners are obtained as air conditioners A and B.

[0068] Air conditioners A and B are sorted in descending order according to the velocity field correlation factor. The velocity field correlation factor of air conditioner B is 1.65, and the velocity field correlation factor of air conditioner A is 1.02.

[0069] Air conditioners A and B are sorted in descending order according to their fan speeds, and it is found that the fan speed of air conditioner B is greater than that of air conditioner A.

[0070] Obtain the associated air conditioner with a fan speed lower than the middle speed and the largest velocity field correlation factor among air conditioners A and B, which is air conditioner B in this example. Increase the lower limit of the fan speed of the selected air conditioner B by a unit adjustment value ΔV, such as by 20%, and at the same time, decrease the upper limit of the fan speed of the corresponding air conditioner G by a unit adjustment value ΔV, such as by 20%, and store the adjustment signals in the output area of ​​the information storage module respectively. This round of debugging operation is completed, and after an interval of Y minutes, return to step S2.

[0071] The control output module adjusts the air conditioner to be adjusted every time interval S, such as 1 minute. The number of the air conditioner to be adjusted and the corresponding adjustment signal are read from the memory output area, and an adjustment command is issued to the air conditioner unit to be adjusted.

[0072] Embodiment 3: This embodiment discloses another implementation method of the inter-row air conditioning control method for controlling the temperature field of the computer room through the velocity field using an actual example operation. The data room module layout of the inter-row air conditioning is also sampled. Figure 2 The structure in , the information of each air conditioner and the velocity field correlation factor are the same as those in Example 2. The running IT power consumption changes with time. Assuming that the current cabinet running power consumption is as follows Figure 4 As shown, the power consumption of each cabinet is very small and the return air temperature is relatively low.

[0073] Determine whether there is an air conditioner whose return air temperature is greater than the return air temperature upper limit. According to the current example, there is no air conditioner whose return air temperature is greater than the return air temperature upper limit, indicating that the flow velocity field in the high temperature area does not need to be adjusted, and then enter step S3.

[0074] Determine whether there is an air conditioner whose return air temperature is less than the lower limit of the return air temperature. According to this example, the air conditioners whose return air temperature is less than the lower limit of the return air temperature are air conditioner A, air conditioner B, air conditioner I, and air conditioner E, which constitute the second candidate air conditioner.

[0075] It is determined whether the fan speeds of all second candidate air conditioners are running at the lowest speed, and it is found that all four air conditioners are running at the lowest speed.

[0076] Determine whether the supply air temperatures of all air conditioners in the second candidate air conditioner group are lower than the supply air temperature limit. Similarly, if the supply air temperatures of the four air conditioners are all lower than the supply air temperature limit, select the air conditioner with the lowest return air temperature as air conditioner B, turn off air conditioner B, and return to step S2 until the fan speeds of all air conditioners are greater than the set minimum speed.

[0077] The control output module adjusts the air conditioner to be adjusted every time interval S, such as 1 minute. The number of the air conditioner to be adjusted and the corresponding adjustment signal are read from the memory output area, and an adjustment command is issued to the air conditioner unit to be adjusted.

[0078] Embodiment 4: This embodiment discloses a row-to-row air conditioning control device for controlling the temperature field of a computer room through a velocity field, which is specifically used in the method of embodiment 1. Figure 5 As shown, the device includes a velocity field correlation factor calculation module 4, an information storage module 2, an air conditioning state reading module 3, a control module 1, and a control output module 5. The control module is connected to the information storage module, and the information storage module is respectively connected to the air conditioning state reading module, the velocity field correlation factor calculation module, and the control output module. The air conditioning state reading module, the velocity field correlation factor calculation module, and the control output module are respectively connected to each air conditioner.

[0079] A velocity field correlation factor calculation module calculates the velocity field correlation factor of each air conditioner and its associated air conditioner, which is stored in the information storage module; The information storage module stores the velocity field correlation factor of the air conditioner, the air conditioner status information, and the adjustment signal of the air conditioner to be adjusted; the air conditioner status reading module reads the status information of each air conditioner and stores it in the information storage module; the read air conditioner status information includes the air conditioner start and stop status, whether it is a fault status, return air temperature, supply air temperature, fan speed, upper and lower limits of return air temperature, supply air temperature limit and upper and lower limits of fan speed.

[0080] The control module reads the velocity field correlation factor and the air conditioner status information of the air conditioner from the information storage module, selects an air conditioner in the first candidate air conditioner group to adjust the speed limit, and selects the air conditioner with the lowest return air temperature in the second candidate air conditioner group to shut down according to the judgment of the supply air temperature; The control output module reads the adjustment signal of the air conditioner to be adjusted at each set time interval to adjust the air conditioner. Specifically, the number of the air conditioner to be adjusted and the corresponding adjustment signal are read from the memory output area, and the adjustment command is issued to the air conditioner unit to be adjusted.

[0081] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0082] Although the terms such as control module, information storage module, air conditioner status reading module, velocity field correlation factor calculation module, control output module, etc. are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A method for controlling row-to-row air conditioning by controlling the temperature field of a machine room through a velocity field, characterized in that: The following steps are involved: S1. Determine the associated air conditioner of each air conditioner and the velocity field correlation factor with the associated air conditioner; S2. Obtain the first candidate air conditioner group with too high return air temperature, select the first air conditioner with high fan speed, obtain the first air conditioner with the largest fan speed, select the associated air conditioner with the largest flow field correlation factor and low fan speed, increase the lower limit of the fan speed of the associated air conditioner, and reduce the upper limit of the fan speed of the first air conditioner; S3. Obtain the second candidate air conditioner group with too low return air temperature, and select the air conditioner with the lowest return air temperature to shut down according to the judgment of the supply air temperature; S4. Adjust the air conditioner that needs to be adjusted at every set time interval.

2. The method for controlling the temperature field of a computer room by controlling the row air conditioning by the flow velocity field according to claim 1 is characterized in that: Determine the velocity field correlation factors, including: Determine the geometric center of each air conditioner return outlet; Determine the return air velocity V when each air conditioner is running separately min The distance R between the point and the geometric center max ; The current air conditioner is the main air conditioner. The geometric center of the main air conditioner is the center of the circle. max Draw a circle for the radius and get other air conditioners in the circle as associated air conditioners; Take the geometric center of the main air conditioner as the center of the circle, draw a circle through the geometric center of the associated air conditioner, and obtain the radius R i ; Calculate the velocity field correlation factor X i =R max / R i .

3. The method for controlling the temperature field of a computer room by controlling the row air conditioning by the flow velocity field according to claim 1 is characterized in that: Set the upper limit of the return air temperature of the air conditioner to determine whether the return air temperature of the air conditioner is greater than the upper limit of the return air temperature. If yes, obtain these air conditioners to obtain the first candidate air conditioner group; if no, go to step S3.

4. The method for controlling the inter-row air conditioning by controlling the temperature field of a computer room through a velocity field according to claim 3 is characterized in that: For the first candidate air conditioner group, an air conditioner whose fan speed is greater than the middle speed and less than or equal to the upper speed limit is selected as the first air conditioner, and the middle speed is the average of the upper speed limit and the lower speed limit.

5. The method for controlling the inter-row air conditioning by controlling the temperature field of the computer room through the flow velocity field according to claim 4 is characterized in that: Select the first air conditioner with the largest fan speed from the first air conditioners, and obtain its associated air conditioners; Sort the associated air conditioners in descending order according to the velocity field correlation factor, and sort them in descending order according to the fan speed of the associated air conditioners; Obtain the associated air conditioner whose fan speed is less than the middle speed and whose velocity field correlation factor is the largest. If there are multiple associated air conditioners with the same velocity field correlation factor, select the associated air conditioner with the smallest fan speed.

6. The method for controlling the inter-row air conditioning by controlling the temperature field of a computer room through a velocity field according to claim 1 or 5, characterized in that: The unit adjustment value is set, the lower limit value of the speed of the selected associated air conditioner fan is increased by the unit adjustment value, and the upper limit value of the speed of the corresponding first air conditioner fan is decreased by the unit adjustment value.

7. The method for controlling the temperature field of a computer room by controlling the row-to-row air conditioning by using the flow velocity field according to claim 1, characterized in that: Set the lower limit of the return air temperature of the air conditioner to determine whether the return air temperature of the air conditioner is lower than the lower limit of the return air temperature. If yes, obtain these air conditioners to obtain the second candidate air conditioner group; if no, return to step S2.

8. The method for controlling the inter-row air conditioning by controlling the temperature field of a computer room through a velocity field according to claim 7 is characterized in that: After obtaining the second candidate air conditioner group, determine whether the fan speeds of all second candidate air conditioners are running at the lowest speed. If yes, the air conditioner with the lowest return air temperature is selected and turned off based on the supply air temperature. If no, it indicates that the fan speed is set incorrectly.

9. The method for controlling the inter-row air conditioning by controlling the temperature field of a computer room through a velocity field according to claim 8, characterized in that: Set the supply air temperature limit and determine whether the supply air temperatures of all air conditioners in the second candidate air conditioner group are lower than the supply air temperature limit. If so, select the air conditioner with the lowest return air temperature and shut it down; If not, select the air conditioners whose supply air temperature is higher than the supply air temperature limit and shut them down, prompting these air conditioners of cooling failure, and select the air conditioner with the lowest return air temperature from the remaining air conditioners below the supply air temperature limit and shut them down.

10. A row-to-row air conditioning control device for controlling the temperature field of a machine room through a flow velocity field, characterized in that: include, A velocity field correlation factor calculation module calculates the velocity field correlation factor of each air conditioner and its associated air conditioner; An information storage module stores the flow velocity field correlation factor of the air conditioner, the air conditioner status information, and the adjustment signal of the air conditioner to be adjusted; An air conditioner status reading module reads the status information of each air conditioner and stores it in the information storage module; The control module reads the velocity field correlation factor of the air conditioner and the air conditioner status information, selects an air conditioner in the first candidate air conditioner group to adjust the speed limit, and selects the air conditioner with the lowest return air temperature in the second candidate air conditioner group to shut down according to the judgment of the supply air temperature; The control output module reads the adjustment signal of the air conditioner to be adjusted at set intervals to adjust the air conditioner.

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