An intelligent control system and control method for a cooling tower

Abstract

The present invention discloses an intelligent control system and control method for a cooling tower, including: an acquisition module for acquiring the actual outlet water temperature of the cooling tower; a first judgment module for judging whether the actual outlet water temperature is within a preset temperature range; the preset temperature range includes a first preset threshold and a second preset threshold, and the first preset threshold is less than the second preset threshold; a generation module for generating a first adjustment instruction when the first judgment module determines that the actual outlet water temperature is less than the first preset threshold; and generating a second adjustment instruction when the first judgment module determines that the actual outlet water temperature is greater than the second preset threshold; a control module for receiving the first adjustment instruction or the second adjustment instruction and controlling the cooling tower fan system to execute. Accurately control the actual outlet water temperature of the cooling tower to improve the cooling effect of the cooling water system.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly to an intelligent control system and a control method for a cooling tower. Background Art

[0002] A cooling tower is a device that allows cooling water to come into full direct or indirect contact with air, and transfers the heat of the water to the air through heat and mass exchange. It is also an important and indispensable component in an air conditioning system. The operating condition of the cooling tower directly affects the energy efficiency of the chiller and the overall energy efficiency of the entire air conditioning system. To maximize the role of the cooling tower, under certain outdoor meteorological conditions and load conditions, it is necessary to make full use of the heat exchange area of the cooling tower and the air volume of the fan to ensure sufficient heat and mass exchange between the cooling water and the air, so that the outlet water temperature of the cooling tower is reduced to a sufficiently low level, thereby reducing the condensation temperature of the chiller and improving the energy efficiency of the chiller.

[0003] Among them, the control of the cooling tower fan has a crucial impact on the cooling effect of the cooling water system. Improper control of the operating parameters of the cooling tower fan will cause the temperature of the cooling water to be too high or too low, affecting the refrigeration effect of the central air conditioning unit. For example, if the cooling water temperature is too high, it will cause the exhaust pressure of the compressor to be too high or even exceed the pressure protection value, resulting in the compressor alarm and shutdown; if the cooling water temperature is too low, it will cause the difference between the suction pressure and the exhaust pressure to be too small, and the compressor cannot return oil normally, and in severe cases, it will also cause the compressor alarm and shutdown. Therefore, it is necessary to control the actual outlet water temperature of the cooling tower within a certain range. In the prior art, the cooling tower fan is only turned off when the actual outlet water temperature is lower than the first preset threshold; and the cooling tower fan is turned on when the actual outlet water temperature is higher than the second preset threshold. In actual scenarios, when designing multiple cooling tower fans, there is no more precise control over which cooling tower fans to turn off or on and the number of them to turn off or on. Frequent turning on and off of the cooling tower fans will lead to waste of resources and lack of precise control in combination with specific cooling or heating commands, the operating power and operating duration of the currently operating cooling tower fans. Therefore, the control of the actual outlet water temperature is not precise enough. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the above technologies to some extent. For this reason, the first object of the present invention is to propose an intelligent control system for a cooling tower to accurately control the actual outlet water temperature of the cooling tower and improve the cooling effect of the cooling water system.

[0005] The second object of the present invention is to propose an intelligent control method for a cooling tower.

[0006] To achieve the above object, the first aspect embodiment of the present invention proposes an intelligent control system for a cooling tower, including:

[0007] An acquisition module, configured to acquire the actual outlet water temperature of the cooling tower;

[0008] A first judgment module, configured to judge whether the actual outlet water temperature is within a preset temperature range; the preset temperature range includes a first preset threshold and a second preset threshold, and the first preset threshold is less than the second preset threshold;

[0009] A generation module, configured to:

[0010] When the first judgment module determines that the actual outlet water temperature is less than the first preset threshold, generate a first adjustment instruction;

[0011] When the first judgment module determines that the actual outlet water temperature is greater than the second preset threshold, generate a second adjustment instruction;

[0012] A control module, configured to receive the first adjustment instruction or the second adjustment instruction and control the cooling tower fan system to execute.

[0013] According to some embodiments of the present invention, the acquisition module includes a temperature sensor disposed at the outlet of the cooling tower.

[0014] According to some embodiments of the present invention, the cooling tower fan system includes:

[0015] A first determination module, configured to:

[0016] Analyze the first adjustment instruction to determine the minimum temperature increase value and the temperature increase duration;

[0017] Acquire the operating power and operating duration of each cooling tower fan;

[0018] Judge whether there is a cooling tower fan whose operating power is greater than the preset operating power and the operating duration is greater than the preset operating duration. If so, use it as the first cooling tower fan;

[0019] Query a first preset data table according to the minimum temperature increase value and the temperature increase duration to determine the maximum shutdown quantity; obtain the quantity of the first cooling tower fans and compare it with the maximum shutdown quantity. When it is determined that the quantity of the first cooling tower fans is less than the maximum shutdown quantity, turn off all the first cooling tower fans;

[0020] A first adjustment module, configured to:

[0021] Use the other cooling tower fans except the first cooling tower fans as the second cooling tower fans; acquire the operating power of the second cooling tower fans and sort them from large to small to obtain a first queuing queue;

[0022] Select the first preset number of second cooling tower fans in the first queuing queue as the first target second cooling tower fans, and adjust the operating power of the first target second cooling tower fans according to the first preset rule.

[0023] According to some embodiments of the present invention, it further includes:

[0024] A second judgment module, configured to:

[0025] Compare the actual outlet water temperature of the cooling tower detected by the acquisition module during the operation of the first target second cooling tower fan based on the adjusted operating power with the first preset threshold;

[0026] When it is determined that the actual outlet water temperature is equal to the first preset threshold, set a preset duration;

[0027] Statistically analyze the actual outlet water temperature within the preset duration;

[0028] Judge whether the actual outlet water temperature of the cooling tower will be greater than the second preset threshold according to the data analysis. If not, control the currently operating second cooling tower fans to maintain their current operating power.

[0029] According to some embodiments of the present invention, it further includes:

[0030] A second adjustment module, configured to:

[0031] When the second judgment module determines according to the data analysis that the actual outlet water temperature of the cooling tower will be greater than the second preset threshold, statistically analyze the operating power of the currently operating second cooling tower fans, sort them from largest to smallest, and establish a second queuing queue;

[0032] Select the last preset number of second cooling tower fans in the second queuing queue as the second target second cooling tower fans, and adjust the operating power of the second target second cooling tower fans according to the second preset rule;

[0033] After the adjustment, make a judgment again and perform iterative calculations until it is determined that the target operating power of each second cooling tower fan makes the actual outlet water temperature within the preset temperature range.

[0034] According to some embodiments of the present invention, it further includes: A third adjustment module, configured to:

[0035] When the first determination module determines that the number of first cooling tower fans is greater than the maximum shutdown number, shut down the maximum shutdown number of first cooling tower fans;

[0036] Judge whether the actual outlet water temperature collected by the acquisition module after a preset time period after shutting down the maximum shutdown number of first cooling tower fans is within the preset temperature range;

[0037] If the actual outlet water temperature collected by the acquisition module is less than the first preset threshold after a preset time period following the shutdown of the first cooling tower fan with the maximum shutdown quantity, another first cooling tower fan is shut down; iterative processing is performed until the first quantity of the first cooling tower fans that need to be operated currently is determined;

[0038] Or

[0039] If the actual outlet water temperature collected by the acquisition module is greater than the first preset threshold after a preset time period following the shutdown of the first cooling tower fan with the maximum shutdown quantity, one of the first cooling tower fans that has been shut down is started; iterative processing is performed until the second quantity of the first cooling tower fans that need to be operated currently is determined.

[0040] According to some embodiments of the present invention, it further includes: a fourth adjustment module, configured to:

[0041] When the first determination module determines that there is no cooling tower fan with an operating power greater than the preset power and an operating duration greater than the preset duration, a weighted calculation is performed based on the operating power and operating duration of the cooling tower fans to obtain a quantization value of the operating conditions of the cooling tower fans, and they are sorted from largest to smallest to obtain a third queuing queue;

[0042] Determine the median value in the third queuing queue, and divide the third queuing queue into a front segment queue and a rear segment queue according to the median value;

[0043] Obtain the quantity of the front segment queue;

[0044] Based on querying a second preset data table according to the minimum temperature rise value, the temperature rise duration, and the quantity of the front segment queue, determine the power reduction ratio;

[0045] Lower the operating power of the cooling tower fans in the front segment queue according to the power reduction ratio.

[0046] According to some embodiments of the present invention, it further includes:

[0047] A correction module, configured to:

[0048] Judge the actual outlet water temperature of the cooling tower after the acquisition module lowers the operating power of the cooling tower fans in the front segment queue according to the power reduction ratio, and judge whether it is greater than the second preset threshold;

[0049] When it is determined to be greater than the second preset threshold, correct the power reduction ratio to obtain a corrected power reduction ratio, and adjust the operating power of the cooling tower fans in the front segment queue based on the corrected power reduction ratio.

[0050] According to some embodiments of the present invention, the cooling tower fan system includes:

[0051] A second determination module, configured to:

[0052] Parse the second adjustment instruction to determine the minimum cooling value and the cooling duration;

[0053] Obtain the operating power of the currently operating cooling tower fan;

[0054] Input the operating power of the currently operating cooling tower fan, the maximum adjustable operating power, the current actual outlet water temperature, and the cooling duration into a pre-trained neural model to output the theoretical cooling value;

[0055] When it is determined that the theoretical cooling value is less than the minimum cooling value, determine the difference, query the third data table based on the difference and the cooling duration, and determine the number of cooling tower fans to be newly added;

[0056] Perform cooling based on the newly added cooling tower fans and the currently operating cooling tower fans.

[0057] To achieve the above object, an embodiment of the second aspect of the present invention proposes an intelligent control method for a cooling tower, including:

[0058] Obtain the actual outlet water temperature of the cooling tower;

[0059] Judge whether the actual outlet water temperature is within a preset temperature range; the preset temperature range includes a first preset threshold and a second preset threshold, and the first preset threshold is less than the second preset threshold;

[0060] When it is determined that the actual outlet water temperature is less than the first preset threshold, generate a first adjustment instruction; when it is determined that the actual outlet water temperature is greater than the second preset threshold, generate a second adjustment instruction;

[0061] The cooling tower fan system receives the first adjustment instruction or the second adjustment instruction and executes it.

[0062] The present invention proposes an intelligent control system and control method for a cooling tower, which accurately controls the actual outlet water temperature of the cooling tower and improves the cooling effect of the cooling water system.

[0063] Other features and advantages of the present invention will be described in the following description of the specification, and in part will be obvious from the description of the specification, or will be understood by implementing the present invention. The objects and other advantages of the present invention can be achieved and obtained by the structures specifically pointed out in the written description and the drawings.

[0064] The technical solution of the present invention will be further described in detail below through the drawings and embodiments. Description of the Drawings

[0065] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0066] Figure 1 is a block diagram of an intelligent control system for a cooling tower according to an embodiment of the present invention;

[0067] Figure 2 is a block diagram of a cooling tower fan system according to an embodiment of the present invention;

[0068] Figure 3 is a flowchart of an intelligent control method for a cooling tower according to an embodiment of the present invention. Detailed Embodiments

[0069] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention.

[0070] As Figure 1 shown, an embodiment of the first aspect of the present invention provides an intelligent control system for a cooling tower, including:

[0071] An acquisition module, configured to acquire the actual outlet water temperature of the cooling tower;

[0072] A first judgment module, configured to judge whether the actual outlet water temperature is within a preset temperature range; the preset temperature range includes a first preset threshold and a second preset threshold, and the first preset threshold is less than the second preset threshold;

[0073] A generation module, configured to:

[0074] Generate a first adjustment instruction when the first judgment module determines that the actual outlet water temperature is less than the first preset threshold;

[0075] Generate a second adjustment instruction when the first judgment module determines that the actual outlet water temperature is greater than the second preset threshold;

[0076] A control module, configured to receive the first adjustment instruction or the second adjustment instruction and control the cooling tower fan system to execute.

[0077] Working principle of the above technical solution: An acquisition module is used to acquire the actual outlet water temperature of the cooling tower; a first judgment module is used to judge whether the actual outlet water temperature is within a preset temperature range; the preset temperature range includes a first preset threshold and a second preset threshold, and the first preset threshold is less than the second preset threshold; a generation module is used to: when the first judgment module determines that the actual outlet water temperature is less than the first preset threshold, generate a first adjustment instruction; the first adjustment instruction is a temperature increase instruction. The regulation is carried out by closing the corresponding cooling tower fan and / or reducing the power of the cooling tower fan. When the first judgment module determines that the actual outlet water temperature is greater than the second preset threshold, generate a second adjustment instruction; the second adjustment instruction is a temperature decrease instruction, and the regulation is carried out by turning on the corresponding cooling tower fan and / or increasing the power of the cooling tower fan. A control module is used to receive the first adjustment instruction or the second adjustment instruction and control the cooling tower fan system to execute.

[0078] Beneficial effects of the above technical solution: Accurately control the actual outlet water temperature of the cooling tower and improve the cooling effect of the cooling water system.

[0079] According to some embodiments of the present invention, the acquisition module includes a temperature sensor arranged at the outlet of the cooling tower.

[0080] As Figure 2 shown, according to some embodiments of the present invention, the cooling tower fan system includes:

[0081] A first determination module is used to:

[0082] Analyze the first adjustment instruction to determine the minimum temperature increase value and the temperature increase duration;

[0083] Obtain the operating power and operating duration of each cooling tower fan;

[0084] Judge whether there is a cooling tower fan with an operating power greater than the preset operating power and an operating duration greater than the preset operating duration. If so, it is used as the first cooling tower fan;

[0085] Query the first preset data table according to the minimum temperature increase value and the temperature increase duration to determine the maximum shutdown quantity; obtain the quantity of the first cooling tower fans and compare it with the maximum shutdown quantity. When it is determined that the quantity of the first cooling tower fans is less than the maximum shutdown quantity, turn off all the first cooling tower fans;

[0086] A first adjustment module is used to:

[0087] Take the other cooling tower fans except the first cooling tower fans as the second cooling tower fans; obtain the operating power of the second cooling tower fans and sort them from large to small to obtain a first queuing queue;

[0088] Select the first preset number of second cooling tower fans in the first queuing queue as the first target second cooling tower fans, and adjust the operating power of the first target second cooling tower fans according to the first preset rule.

[0089] The working principle of the above technical solution: The minimum temperature rise value is the difference between the first preset threshold and the current actual outlet water temperature. The temperature rise duration is based on the requirements input by the user. The first determination module is used to: parse the first adjustment instruction to determine the minimum temperature rise value and the temperature rise duration; obtain the operating power and operating duration of each cooling tower fan; determine whether there is a cooling tower fan whose operating power is greater than the preset operating power and whose operating duration is greater than the preset operating duration. If so, it is used as the first cooling tower fan; this first cooling tower fan indicates a cooling tower fan with a large operating load and a long operating time. The first preset data table is a temperature rise value-temperature rise duration-maximum shutdown number data table, and this first preset data table is a data table obtained through multiple tests and records of each adjustment. Query the first preset data table according to the minimum temperature rise value and the temperature rise duration to determine the maximum shutdown number; obtain the number of the first cooling tower fans and compare it with the maximum shutdown number. When it is determined that the number of the first cooling tower fans is less than the maximum shutdown number, turn off all the first cooling tower fans; this enables the first cooling tower fans to be shut down for maintenance, improving the service life of the equipment. The first adjustment module is used to: use the other cooling tower fans except the first cooling tower fans as the second cooling tower fans; obtain the operating power of the second cooling tower fans and sort them from largest to smallest to obtain the first queuing queue; select the first preset number of second cooling tower fans in the first queuing queue as the first target second cooling tower fans, and adjust the operating power of the first target second cooling tower fans according to the first preset rule. The preset number can be 3, and the first preset rule can be to make the operating powers of the first preset number of the first target second cooling tower fans be 70%, 80%, and 90% of the current operating power respectively. This facilitates the corresponding reduction of the operating powers of the first preset number of second cooling tower fans.

[0090] The beneficial effects of the above technical solution: Shut down the first cooling tower fans with a large operating load and a long operating time to avoid the longer operation of the first cooling tower fans. At the same time, adjust the operating power of the selected first target second cooling tower fans according to the first preset rule to avoid the long-term high-power operation of the first target second cooling tower fans. Based on the actual situation of the cooling tower fans, more appropriate adjustments are made to realize the reasonable use of the cooling tower fans.

[0091] According to some embodiments of the present invention, it further includes:

[0092] The second determination module is used to:

[0093] During the process of the acquisition module detecting the actual outlet water temperature of the cooling tower while the first target second cooling tower fan operates based on the adjusted operating power, compare the actual outlet water temperature of the cooling tower with the first preset threshold value;

[0094] When it is determined that the actual outlet water temperature is equal to the first preset threshold value, set a preset duration;

[0095] Statistically analyze the actual outlet water temperature within the preset duration and perform data analysis;

[0096] Based on the data analysis, determine whether the actual outlet water temperature of the cooling tower will be greater than the second preset threshold value. If not, control the currently operating second cooling tower fan to maintain the current operating power.

[0097] The working principle and beneficial effects of the above technical solution: The second judgment module is used to: During the process of the acquisition module detecting the actual outlet water temperature of the cooling tower while the first target second cooling tower fan operates based on the adjusted operating power, compare the actual outlet water temperature of the cooling tower with the first preset threshold value; When it is determined that the actual outlet water temperature is equal to the first preset threshold value, set a preset duration; Statistically analyze the actual outlet water temperature within the preset duration and perform data analysis; In one embodiment, performing data analysis includes adding the actual outlet water temperature and time detection points to the coordinate system, performing data fitting, predicting based on the fitted curve, and determining whether the actual outlet water temperature of the cooling tower will be greater than the second preset threshold value. If not, control the currently operating second cooling tower fan to maintain the current operating power. It is convenient to detect the operating effect of the adjusted operating power. When it is determined that the actual outlet water temperature is adjusted within the preset temperature range, control the currently operating second cooling tower fan to maintain the current operating power.

[0098] According to some embodiments of the present invention, it further includes:

[0099] The second adjustment module is used to:

[0100] When the second judgment module determines based on the data analysis that the actual outlet water temperature of the cooling tower will be greater than the second preset threshold value, statistically analyze the operating power of the currently operating second cooling tower fans, sort them from large to small, and establish a second queuing queue;

[0101] Select the last preset number of second cooling tower fans in the second queuing queue as the second target second cooling tower fans, and adjust the operating power of the second target second cooling tower fans according to the second preset rule;

[0102] After the adjustment, make a judgment again and perform iterative calculation until it is determined that the target operating powers of each second cooling tower fan make the actual outlet water temperature within the preset temperature range.

[0103] Working principle and beneficial effects of the above technical solution: The second adjustment module is used to: when the second judgment module determines according to data analysis that the actual water outlet temperature of the cooling tower will be greater than the second preset threshold, count the operating power of the currently operating second cooling tower fans, sort them from large to small, and establish a second queuing queue; select the last preset number of second cooling tower fans in the second queuing queue as the second target second cooling tower fans, and adjust the operating power of the second target second cooling tower fans according to the second preset rule; the preset number can be 3. The second preset rule is to make the operating power of the first preset number of second target second cooling tower fans be 110%, 120%, and 130% of the current operating power respectively. This is convenient for correspondingly increasing the operating power of the last preset number of second cooling tower fans. After adjustment, make a judgment again and perform iterative calculation until it is determined that the target operating power of each second cooling tower fan makes the actual water outlet temperature within the preset temperature range. This is convenient for dynamically adjusting the operating power of the second cooling tower fans in the second queuing queue, ensuring the balance of the operating power of each second cooling tower fan, and reducing the equipment failure rate. At the same time, through power adjustment instead of directly starting a new cooling tower fan, the resource utilization rate is improved, and at the same time, large fluctuations in the actual water outlet temperature are avoided, and the stability of temperature control is improved.

[0104] According to some embodiments of the present invention, it further includes: a third adjustment module for:

[0105] When the first determination module determines that the number of the first cooling tower fans is greater than the maximum shutdown number, shut down the maximum shutdown number of the first cooling tower fans;

[0106] Judge whether the actual water outlet temperature collected by the acquisition module after a preset time period after shutting down the maximum shutdown number of the first cooling tower fans is within the preset temperature range;

[0107] If the actual water outlet temperature collected by the acquisition module after a preset time period after shutting down the maximum shutdown number of the first cooling tower fans is less than the first preset threshold, shut down one more first cooling tower fan; perform iterative processing until it is determined the first number of the first cooling tower fans that need to be operated currently;

[0108] Or

[0109] If the actual water outlet temperature collected by the acquisition module after a preset time period after shutting down the maximum shutdown number of the first cooling tower fans is greater than the first preset threshold, start one of the first cooling tower fans that have been shut down; perform iterative processing until it is determined the second number of the first cooling tower fans that need to be operated currently.

[0110] Working principle and beneficial effects of the above technical solution: In the continuous iterative processing, accurately determine the number of the first cooling tower fans that need to be operated currently.

[0111] According to some embodiments of the present invention, it further includes: a fourth adjustment module, configured to:

[0112] When the first determination module determines that there is no cooling tower fan with an operating power greater than the preset power and an operating duration greater than the preset duration, perform a weighted calculation based on the operating power and operating duration of the cooling tower fan to obtain a quantization value of the operating condition of the cooling tower fan, and sort it from large to small to obtain a third queuing queue;

[0113] Determine the median value in the third queuing queue, and divide the third queuing queue into a front segment queue and a rear segment queue according to the median value;

[0114] Obtain the number of the front segment queue;

[0115] Based on querying a second preset data table according to the minimum temperature rise value, the temperature rise duration, and the number of the front segment queue, determine the power reduction ratio;

[0116] Lower the operating power of the cooling tower fans in the front segment queue according to the power reduction ratio.

[0117] The working principle and beneficial effects of the above technical solution: The fourth adjustment module is configured to: when the first determination module determines that there is no cooling tower fan with an operating power greater than the preset power and an operating duration greater than the preset duration, perform a weighted calculation based on the operating power and operating duration of the cooling tower fan to obtain a quantization value of the operating condition of the cooling tower fan, and sort it from large to small to obtain a third queuing queue; in one embodiment, the weighted coefficient of the operating power is set to 0.6, and the weighted coefficient of the operating duration is set to 0.4. Determine the median value in the third queuing queue, and divide the third queuing queue into a front segment queue and a rear segment queue according to the median value; obtain the number of the front segment queue; based on querying a second preset data table according to the minimum temperature rise value, the temperature rise duration, and the number of the front segment queue, determine the power reduction ratio; the second preset data table is a temperature rise value - temperature rise duration - number - power reduction ratio data table. Obtained through multiple tests and actual operations. Lower the operating power of the cooling tower fans in the front segment queue according to the power reduction ratio. It is convenient to adjust the operating power of a large number of cooling tower fans, reduce the load of the equipment, extend the service life of the equipment, and avoid waste and drastic temperature changes caused by shutting down the equipment.

[0118] According to some embodiments of the present invention, it further includes:

[0119] A correction module, configured to:

[0120] Judge the actual outlet water temperature of the cooling tower after the acquisition module lowers the operating power of the cooling tower fans in the front segment queue based on the power reduction ratio, and judge whether it is greater than a second preset threshold;

[0121] When it is determined that it is greater than the second preset threshold, the power reduction ratio is corrected to obtain a corrected power reduction ratio, and the operating power of the cooling tower fans in the front queue is adjusted based on the corrected power reduction ratio.

[0122] The working principle and beneficial effects of the above technical solution: A correction module is used to: judge the actual outlet water temperature of the cooling tower after the acquisition module reduces the operating power of the cooling tower fans in the front queue based on the power reduction ratio, and judge whether it is greater than the second preset threshold; when it is determined that it is greater than the second preset threshold, correct the power reduction ratio to obtain a corrected power reduction ratio, and adjust the operating power of the cooling tower fans in the front queue based on the corrected power reduction ratio. Based on the correction module, the dynamic correction of the power reduction ratio is ensured, thereby improving the accuracy and flexibility of temperature control.

[0123] According to some embodiments of the present invention, the cooling tower fan system includes:

[0124] A second determination module is used to:

[0125] Parse the second adjustment instruction to determine the minimum temperature drop value and the temperature drop duration;

[0126] Obtain the operating power of the currently operating cooling tower fans;

[0127] Input the operating power of the currently operating cooling tower fans, the maximum adjustable operating power, the current actual outlet water temperature, and the temperature drop duration into a pre-trained neural model to output a theoretical temperature drop value;

[0128] When it is determined that the theoretical temperature drop value is less than the minimum temperature drop value, determine the difference, query the third data table based on the difference and the temperature drop duration, and determine the number of cooling tower fans to be newly added;

[0129] Perform temperature reduction processing based on the newly added cooling tower fans and the currently operating cooling tower fans.

[0130] Working principle and beneficial effects of the above technical solution: The minimum temperature reduction value is the difference between the current actual outlet water temperature and the second preset threshold. The neural model is obtained through multiple trainings based on sample data. The second determination module is configured to: analyze the second adjustment instruction to determine the minimum temperature reduction value and the temperature reduction duration; obtain the operating power of the currently operating cooling tower fan; input the operating power of the currently operating cooling tower fan, the maximum adjustable operating power, the current actual outlet water temperature, and the temperature reduction duration into the pre-trained neural model to output the theoretical temperature reduction value; when it is determined that the theoretical temperature reduction value is less than the minimum temperature reduction value, determine the difference, query the third data table based on the difference and the temperature reduction duration to determine the number of cooling tower fans to be newly added; the third data table is difference - temperature reduction duration - quantity, and determine the number of cooling tower fans to be newly added. The third data table is obtained through multiple tests and actual adjustment records. Perform temperature reduction treatment based on the newly added cooling tower fans and the currently operating cooling tower fans. Accurately determine the number of newly added cooling tower fans, improving the accuracy of control.

[0131] In one embodiment, when it is determined that the theoretical temperature reduction value is greater than the minimum temperature reduction value, adjust by adjusting the operating power of the currently operating cooling tower fan to avoid adding new cooling tower fans and wasting resources.

[0132] As Figure 3 shown, the second aspect embodiment of the present invention proposes an intelligent control method for a cooling tower, including steps S1 - S4:

[0133] S1. Obtain the actual outlet water temperature of the cooling tower;

[0134] S2. Determine whether the actual outlet water temperature is within a preset temperature range; the preset temperature range includes a first preset threshold and a second preset threshold, and the first preset threshold is less than the second preset threshold;

[0135] S3. When it is determined that the actual outlet water temperature is less than the first preset threshold, generate a first adjustment instruction; when it is determined that the actual outlet water temperature is greater than the second preset threshold, generate a second adjustment instruction;

[0136] S4. The cooling tower fan system receives the first adjustment instruction or the second adjustment instruction and executes it.

[0137] Beneficial effects of the above technical solution: Accurately control the actual outlet water temperature of the cooling tower, improving the cooling effect of the cooling water system.

[0138] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. An intelligent control system for a cooling tower, characterized in that, Including: An acquisition module, configured to acquire the actual outlet water temperature of the cooling tower; A first judgment module, configured to judge whether the actual outlet water temperature is within a preset temperature range; The preset temperature range includes a first preset threshold and a second preset threshold, and the first preset threshold is less than the second preset threshold; A generation module, configured to: When the first judgment module determines that the actual outlet water temperature is less than the first preset threshold, generate a first adjustment instruction; the first adjustment instruction is a temperature increase instruction, and is regulated by turning off the corresponding cooling tower fan and reducing the power of the cooling tower fan; When the first judgment module determines that the actual outlet water temperature is greater than the second preset threshold, generate a second adjustment instruction; the second adjustment instruction is a temperature decrease instruction, and is regulated by turning on the corresponding cooling tower fan and increasing the power of the cooling tower fan; A control module, configured to receive the first adjustment instruction or the second adjustment instruction, and control the cooling tower fan system to execute; The cooling tower fan system includes: A first determination module, configured to: Analyze the first adjustment instruction to determine the minimum temperature increase value and the temperature increase duration; Acquire the operating power and operating duration of each cooling tower fan; Judge whether there is a cooling tower fan whose operating power is greater than the preset operating power and the operating duration is greater than the preset operating duration. If so, regard it as the first cooling tower fan; Query the first preset data table according to the minimum temperature increase value and the temperature increase duration to determine the maximum shutdown quantity; acquire the quantity of the first cooling tower fans, and compare it with the maximum shutdown quantity. When it is determined that the quantity of the first cooling tower fans is less than the maximum shutdown quantity, turn off all the first cooling tower fans; A first adjustment module, configured to: Regard the other cooling tower fans except the first cooling tower fans as the second cooling tower fans; acquire the operating power of the second cooling tower fans, and sort them from large to small to obtain a first queuing queue; Select the first preset number of the second cooling tower fans in the first queuing queue as the first target second cooling tower fans, and adjust the operating power of the first target second cooling tower fans according to a first preset rule; the preset number is 3; the first preset rule is to make the operating powers of the first preset number of the first target second cooling tower fans be 70%, 80%, and 90% of the current operating power respectively; It further includes: a fourth adjustment module, configured to: When the first determination module determines that there is no cooling tower fan whose operating power is greater than the preset power and the operating duration is greater than the preset duration, perform weighted calculation according to the operating power and operating duration of the cooling tower fans to obtain a quantization value of the operating conditions of the cooling tower fans, and sort them from large to small to obtain a third queuing queue; Determine the median value in the third queuing queue, and divide the third queuing queue into a front segment queue and a rear segment queue according to the median value; Acquire the quantity of the front segment queue; Based on querying the second preset data table according to the minimum temperature increase value, the temperature increase duration and the quantity of the front segment queue, determine the power reduction ratio; Lower the operating power of the cooling tower fans in the front segment queue according to the power reduction ratio.

2. The intelligent control system of the cooling tower according to claim 1, wherein The acquisition module includes a temperature sensor arranged at the outlet of the cooling tower.

3. The intelligent control system of the cooling tower according to claim 1, characterized in that, It further includes: A second judgment module, configured to: During the process of the acquisition module detecting the actual outlet water temperature of the cooling tower while the first target second cooling tower fan operates based on the adjusted operating power, compare the actual outlet water temperature of the cooling tower with the first preset threshold; When it is determined that the actual outlet water temperature is equal to the first preset threshold, set a preset duration; Statistical the actual outlet water temperature within the preset duration and conduct data analysis; Based on the data analysis, determine whether the actual outlet water temperature of the cooling tower will be greater than the second preset threshold. If not, control the currently operating second cooling tower fan to maintain the current operating power.

4. The intelligent control system of the cooling tower according to claim 3, characterized in that, It also includes: A second adjustment module for: When the second judgment module determines based on the data analysis that the actual outlet water temperature of the cooling tower will be greater than the second preset threshold, statistical the operating power of the currently operating second cooling tower fans, sort them from large to small, and establish a second queuing queue; Select the latter preset number of second cooling tower fans in the second queuing queue as the second target second cooling tower fans, and adjust the operating power of the second target second cooling tower fans according to the second preset rule; After the adjustment, make a judgment again and perform iterative calculations until it is determined that the target operating powers of each second cooling tower fan make the actual outlet water temperature within the preset temperature range.

5. The intelligent control system of the cooling tower according to claim 1, wherein It also includes: A third adjustment module for: When the first determination module determines that the number of the first cooling tower fans is greater than the maximum shutdown number, shut down the first cooling tower fans with the maximum shutdown number; Judge whether the actual outlet water temperature collected by the acquisition module after a preset time period after shutting down the first cooling tower fans with the maximum shutdown number is within the preset temperature range; If the actual outlet water temperature collected by the acquisition module after a preset time period after shutting down the first cooling tower fans with the maximum shutdown number is less than the first preset threshold, shut down one more first cooling tower fan; perform iterative processing until it is determined the first number of the first cooling tower fans that need to operate currently; Or If the actual outlet water temperature collected by the acquisition module after a preset time period after shutting down the first cooling tower fans with the maximum shutdown number is greater than the first preset threshold, start one of the first cooling tower fans that have been shut down; Perform iterative processing until it is determined the second number of the first cooling tower fans that need to operate currently.

6. The intelligent control system of the cooling tower according to claim 1, characterized in that, It also includes: A correction module for: Judge the actual outlet water temperature of the cooling tower after the acquisition module reduces the operating power of the cooling tower fans in the front queue based on the power reduction ratio, and determine whether it is greater than the second preset threshold; When it is determined to be greater than the second preset threshold, correct the power reduction ratio to obtain a corrected power reduction ratio, and adjust the operating power of the cooling tower fans in the front queue based on the corrected power reduction ratio.

7. The intelligent control system of the cooling tower according to claim 1, characterized in that The cooling tower fan system includes: A second determination module for: Parse the second adjustment instruction to determine the minimum temperature reduction value and the temperature reduction duration; Obtain the operating power of the currently operating cooling tower fans; Input the operating power of the currently operating cooling tower fans, the maximum adjustable operating power, the current actual outlet water temperature, and the temperature reduction duration into a pre-trained neural model to output a theoretical temperature reduction value; When it is determined that the theoretical temperature reduction value is less than the minimum temperature reduction value, determine the difference, query the third data table based on the difference and the temperature reduction duration, and determine the number of cooling tower fans that need to be added; Cooling treatment is carried out based on the newly added cooling tower fans and the currently operating cooling tower fans.

8. An intelligent control method for a cooling tower, characterized in that, Including: Obtain the actual outlet water temperature of the cooling tower; Judge whether the actual outlet water temperature is within the preset temperature range; The preset temperature range includes a first preset threshold and a second preset threshold, and the first preset threshold is less than the second preset threshold; When it is determined that the actual outlet water temperature is less than the first preset threshold, generate a first adjustment instruction; when it is determined that the actual outlet water temperature is greater than the second preset threshold, generate a second adjustment instruction; the first adjustment instruction is a heating instruction, and it is regulated by closing the corresponding cooling tower fans and reducing the power of the cooling tower fans; the second adjustment instruction is a cooling instruction, and it is regulated by turning on the corresponding cooling tower fans and increasing the power of the cooling tower fans; The cooling tower fan system receives the first adjustment instruction or the second adjustment instruction and executes it; The cooling tower fan system includes: The first determination module is used for: Analyze the first adjustment instruction to determine the minimum heating value and the heating duration; Obtain the operating power and operating duration of each cooling tower fan; Judge whether there is a cooling tower fan with an operating power greater than the preset operating power and an operating duration greater than the preset operating duration. If so, regard it as the first cooling tower fan; Query the first preset data table according to the minimum heating value and the heating duration to determine the maximum shutdown quantity; obtain the quantity of the first cooling tower fans and compare it with the maximum shutdown quantity. When it is determined that the quantity of the first cooling tower fans is less than the maximum shutdown quantity, turn off all the first cooling tower fans; The first adjustment module is used for: Regard the other cooling tower fans except the first cooling tower fans as the second cooling tower fans; obtain the operating power of the second cooling tower fans and sort them from large to small to obtain the first queuing queue; Select the first preset number of the second cooling tower fans in the first queuing queue as the first target second cooling tower fans, and adjust the operating power of the first target second cooling tower fans according to the first preset rule; the preset number is 3; the first preset rule is to make the operating powers of the first preset number of the first target second cooling tower fans be 70%, 80%, and 90% of the current operating power respectively; It also includes: the fourth adjustment module is used for: When the first determination module determines that there is no cooling tower fan with an operating power greater than the preset power and an operating duration greater than the preset duration, perform weighted calculation according to the operating power and operating duration of the cooling tower fans to obtain a quantization value of the operating conditions of the cooling tower fans, and sort them from large to small to obtain the third queuing queue; Determine the middle value in the third queuing queue, and divide the third queuing queue into a front segment queue and a rear segment queue according to the middle value; Obtain the quantity of the front segment queue; Based on querying the second preset data table according to the minimum heating value, the heating duration and the quantity of the front segment queue, determine the power reduction ratio; Lower the operating power of the cooling tower fans in the front segment queue according to the power reduction ratio.

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