Cooling tower group control device based on heat load dynamic distribution and control method thereof

Abstract

The present application discloses a group control device for cooling towers based on dynamic heat load distribution and its control method, which specifically relates to the field of intelligent control technology for industrial circulating cooling systems. It includes two groups of cooling tower bodies arranged in parallel, an intelligent control cabinet, and a cooling component configured with the cooling tower bodies; the cooling component is correspondingly installed in the heat exchange chamber inside the cooling tower body; the intelligent control cabinet is installed beside the cooling tower body. The present application high-frequency collects parameters such as the inlet and outlet water temperature, flow rate, pressure of cooling water, and ambient temperature and humidity through a sensor assembly, and the core controller of the intelligent control cabinet real-time calculates the total heat load of the system and the split heat load of a single tower, and generates an optimal load distribution plan in combination with the rated efficient operation range of the cooling tower body. This method can accurately match the operation load of a single tower with the heat exchange demand, and fundamentally avoid the cooling tower deviating from the efficient heat exchange range.

Description

Technical Field

[0001] This application relates to the field of intelligent control technology for industrial circulating cooling systems, and more specifically, to a cooling tower group control device and control method based on dynamic heat load distribution. Background Technology

[0002] Parallel cooling towers, as core cold-end heat exchange equipment in industrial circulating water systems of high-cooling-consumption industries such as central air conditioning in large public buildings, chemical, power, and metallurgy, are crucial for ensuring a stable supply of cooling capacity and maintaining stable production conditions and building environmental parameters. With the continuous improvement of industry demands for energy conservation, consumption reduction, and intelligent operation and maintenance, cooling tower group control technology is developing towards full-condition adaptive and refined load collaborative control. Group control schemes based on dynamic matching of heat loads have become the core research and development direction for improving the energy efficiency and intelligent management of cooling systems, providing important technical support for the efficient collaborative operation of parallel cooling tower groups.

[0003] Existing publication number CN110118426A discloses a cooling tower group control device suitable for subway stations; it includes an intelligent control unit, a frequency converter, and an electrical control system mounted on a cabinet. The intelligent control unit includes an intelligent learning module, an intelligent acquisition module, and a tower group control execution module. The frequency converter receives instructions from the intelligent control system and executes cooling tower frequency control. The electrical control system establishes the electrical control process and completes the equipment's start-up, shutdown, and control functions. Compared with existing technologies, by controlling the cooling tower group, lower cooling water outlet temperature is achieved while reducing cooling tower power consumption, thereby improving the chiller unit's energy efficiency and ultimately reducing the air conditioning system's operating energy consumption. The inventors discovered the following problems with existing technologies during the development of this application:

[0004] Existing parallel cooling tower group control systems mostly adopt a fixed number of units to start and stop, and a simple inlet and outlet water temperature difference threshold control mode. This mode cannot dynamically allocate the operating load of a single tower according to the real-time heat load of the system. This can easily cause the cooling tower to deviate from the high-efficiency heat exchange range, resulting in problems such as uneven flow distribution, redundant operation of fans and pumps, and mismatch between cooling supply and demand. This leads to high system energy consumption and low heat exchange efficiency. At the same time, the lack of full-condition adaptive control and fault linkage protection capabilities makes it difficult to achieve energy-saving optimization and stable operation under variable load conditions.

[0005] Therefore, a cooling tower group control device and its control method based on dynamic heat load distribution are proposed to address the above problems. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, this application provides a cooling tower group control device and control method based on dynamic heat load distribution to solve the problems mentioned in the background art.

[0007] To achieve the above object, the present application provides the following technical solutions: A cooling tower group control device based on dynamic heat load distribution, including two groups of cooling tower bodies arranged in parallel, and a cooling component, a cooling tower inlet pipe, a cooling tower outlet pipe, a first connecting pipe, an intelligent control cabinet and an alarm mechanism arranged in supporting with the cooling tower body. The cooling component is correspondingly installed in the heat exchange cavity inside the cooling tower body; the water outlet end of the cooling tower inlet pipe is communicated with the water inlet of the cooling component; the water inlet end of the cooling tower outlet pipe is communicated with the water outlet of the cooling component, and the cooling tower inlet pipes between adjacent two groups of cooling tower bodies and the cooling tower outlet pipes are communicated through the first connecting pipe, forming a parallel water circulation loop;

[0008] The intelligent control cabinet is installed beside the cooling tower body; the control output end of the intelligent control cabinet is electrically connected to the cooling component, and the alarm mechanism is installed on the top of the intelligent control cabinet, and the alarm mechanism is electrically connected to the control end of the intelligent control cabinet.

[0009] Preferably, an actuator is installed on one side of the intelligent control cabinet, and a wiring port, a working condition indicator light, a display screen and an operation button are arranged on the actuator housing; the wiring port is electrically connected to the cooling component and the intelligent control cabinet through a control cable; the working condition indicator light is electrically connected to the actuator detection unit for displaying the running state of the actuator in real time; the display screen is used for displaying the real-time running parameters and regulation instructions of the device.

[0010] Preferably, the intelligent control cabinet includes a control cabinet body; an interaction panel, multiple groups of control buttons, an indicator and an indicator light grid are integrated on one side of the control cabinet body; the interaction panel is a touch panel for setting device parameters and monitoring the running state; the control buttons include an equipment emergency stop button, a start-stop button and a mode switching button; the indicator is used for displaying the power supply and running on-off state of the device; the running indicator lights corresponding to each cooling tower body are installed in the indicator light grid for displaying the running state of a single tower.

[0011] Preferably, the alarm mechanism includes a support rod, a sounding unit and an alarm light; the bottom of the support rod is fixedly connected to the top of the intelligent control cabinet; the sounding unit and the alarm light are installed on the top of the support rod; the sounding unit is a buzzer for sound and light alarm; the sounding unit and the alarm light are both electrically connected to the fault diagnosis unit of the intelligent control cabinet for triggering sound and light alarm when the device fails.

[0012] Preferably, the cooling component includes a cooling tower heat exchange disk, a protective shell is arranged outside the cooling tower heat exchange disk, and air inlet louvers are arranged on the side surface of the cooling tower heat exchange disk; a heat dissipation component is installed on the top of the cooling tower body; the cooling tower heat exchange disk is arranged in the heat exchange cavity of the cooling tower body, and the air inlet direction of the air inlet louvers is arranged opposite to the heat exchange surface of the cooling tower heat exchange disk.

[0013] Preferably, the heat dissipation assembly further includes a heat dissipation fan; the outer cover of the heat dissipation fan is provided with a fan shroud; the top surface of the fan shroud has multiple sets of through holes; the drive end of the heat dissipation fan is electrically connected to the intelligent control cabinet and the actuator to realize speed regulation.

[0014] Preferably, sensor assemblies are fixedly installed on both the cooling tower inlet pipe and the cooling tower outlet pipe using mounting straps; the sensor assembly includes a temperature sensor, a flow sensor, and a pressure sensor, and the signal output terminal of the sensor assembly is electrically connected to the intelligent control cabinet to collect real-time data on the inlet and outlet water temperature, flow rate, and pressure of the cooling water, providing data support for dynamic heat load distribution.

[0015] Preferably, both the cooling tower inlet pipe and the cooling tower outlet pipe are equipped with electric valve bodies; a transmission rod is installed on the top of the valve stem of the electric valve body; a handwheel is also fixedly connected to the top of the transmission rod; the electric valve body is used to adjust the cooling water flow of the corresponding pipe; the handwheel is used for manual adjustment of the valve opening and closing in maintenance and emergency situations.

[0016] Preferably, a cooling water pump assembly is installed on one side of the cooling tower body; the cooling water pump assembly includes a pump body; the inlet and outlet of the pump body are connected to the cooling tower outlet pipe and the cooling water return main pipe respectively through a second connecting pipe; the drive end of the pump body is electrically connected to the intelligent control cabinet and the actuator for adjusting the cooling water circulation flow rate.

[0017] Preferably, a control method for a cooling tower group control system based on dynamic heat load distribution includes the following steps:

[0018] Step 1: Input the heat exchange parameters of each cooling tower body through the interactive panel of the intelligent control cabinet, set the cooling water supply temperature, operation protection limit and control mode, execute the system full-loop pre-start self-test, and confirm that each electric valve body, cooling water pump assembly, cooling fan and alarm mechanism are in standby ready state.

[0019] Step 2: After the system starts up, the sensor assemblies distributed on the cooling tower inlet and outlet pipes collect real-time data on the cooling water inlet temperature, outlet temperature, real-time flow rate, and pipeline pressure of each branch and main pipeline. At the same time, the ambient temperature and humidity parameters are collected. All collected data are uploaded to the intelligent control cabinet in real time. The intelligent control cabinet calculates the current total heat load demand of the cooling system in real time and monitors the operating parameters of each equipment unit simultaneously.

[0020] Step 3: Based on the calculated total system heat load and the high-efficiency operating range of each cooling tower, the controller generates a heat load distribution scheme for the parallel multi-tower system, determining the optimal number of operating cooling towers and the load distribution ratio per tower. The controller sends coordinated control commands to each execution unit through actuators, correspondingly adjusting the opening of the electric valves to match the inlet water flow of a single tower, adjusting the operating frequency of the cooling water pump assembly to match the total circulating water volume of the system, and adjusting the speed of the cooling fans to match the heat exchange load allocated to a single tower. This ensures that all operating cooling towers are within the preset high-efficiency heat exchange range, achieving dynamic and balanced distribution of the total system heat load. Simultaneously, the controller compares the operating parameters with the set thresholds in real time. When parameters exceed limits or equipment malfunctions, the alarm mechanism is triggered to activate an audible and visual alarm and execute corresponding protection and control actions.

[0021] The technical effects and advantages of this application are as follows:

[0022] 1. Compared with existing technologies, this cooling tower group control equipment based on dynamic heat load allocation uses a sensor assembly to collect high-frequency data on cooling water inlet and outlet temperatures, flow rates, pressures, and ambient temperature and humidity. The main controller in the intelligent control cabinet calculates the total system heat load and the individual tower branch heat load in real time, and generates an optimal load allocation scheme based on the rated high-efficiency operating range of the cooling tower itself. This replaces the traditional coarse control mode of fixed-number start / stop and simple temperature difference threshold. This method can accurately match the operating load and heat exchange requirements of a single tower, fundamentally preventing the cooling tower from deviating from the high-efficiency heat exchange range, and significantly improving heat exchange efficiency and control accuracy under variable load conditions.

[0023] 2. Compared with existing technologies, this cooling tower group control equipment based on dynamic heat load distribution constructs a parallel balanced water circulation loop that serves as a backup for each other through the first connecting pipe. In conjunction with the actuator, it coordinates and controls the opening degree of the electric valve body, the operating frequency of the cooling water pump assembly, and the speed of the cooling fan, so as to achieve dynamic and precise matching of single tower inlet water flow, system circulating water volume and cooling air volume. This solves the pain points of uneven flow distribution, redundant operation of fans and water pumps, and mismatch between cooling supply and demand in traditional systems, significantly reduces the system's ineffective energy consumption, and achieves energy-saving and optimized operation under all working conditions.

[0024] 3. Compared with existing technologies, this cooling tower group control equipment and its control method based on dynamic heat load distribution, with its intelligent control cabinet's fault diagnosis unit and alarm mechanism, enables real-time monitoring and graded audible and visual early warning of abnormal operating conditions. It is also equipped with an emergency valve control structure that can only be manually rotated by handwheel to achieve safe emergency handling of fault conditions. This makes up for the shortcomings of traditional systems that lack adaptive regulation and fault linkage protection, effectively ensuring the long-term stable operation and maintenance safety of the system under variable load conditions. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall first-person perspective structure of this application;

[0026] Figure 2 This is a structural diagram of the entire application from a second perspective;

[0027] Figure 3 This is a structural schematic diagram of the intelligent control cabinet of this application;

[0028] Figure 4 This is a schematic diagram of the actuator of this application;

[0029] Figure 5 This is a schematic diagram of the cooling tower body of this application;

[0030] Figure 6 This is a schematic diagram of the cooling fan of this application;

[0031] Figure 7 This is a schematic diagram of the sensor assembly of this application;

[0032] Figure 8 This is a schematic diagram of the structure of the cooling tower heat exchange plate of this application;

[0033] Figure 9 This is a schematic diagram showing the fit between the protective shell and the cooling tower heat exchange plate in this application.

[0034] Figure 10 This is a schematic diagram of the pump body of the water pump in this application.

[0035] The attached diagram is labeled as follows: 1. Cooling tower body; 11. Cooling assembly; 12. Cooling tower inlet pipe; 13. Cooling tower outlet pipe; 14. First connecting pipe; 15. Intelligent control cabinet; 16. Alarm mechanism; 2. Actuator; 21. Wiring port; 22. Operating indicator light; 23. Display screen; 24. Operation button; 3. Control cabinet body; 31. Interactive panel; 32. Control button; 33. Indicator; 34. Indicator light grid; 4. Support rod; 41. Sound unit; 42. Alarm light; 5. Cooling tower heat exchange plate; 51. Air inlet louver; 52. Protective shell; 53. Heat dissipation assembly; 6. Heat dissipation fan; 61. Fan shroud; 62. Through hole; 7. Mounting strap; 71. Sensor assembly; 8. Electric valve body; 81. Transmission rod; 82. Handwheel; 9. Cooling water pump assembly; 91. Pump body; 92. Second connecting pipe. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] Example 1

[0038] As attached Figures 1 to 10 The cooling tower group control equipment shown includes two sets of cooling tower bodies 1 arranged in parallel, and cooling components 11, cooling tower inlet pipes 12, cooling tower outlet pipes 13, first connecting pipes 14, intelligent control cabinets 15 and alarm mechanisms 16 that are equipped with the cooling tower bodies 1. The cooling components 11 are installed in the heat exchange chamber inside the cooling tower bodies 1. The outlet end of the cooling tower inlet pipe 12 is connected to the inlet of the cooling components 11. The inlet end of the cooling tower outlet pipe 13 is connected to the outlet of the cooling components 11. The cooling tower inlet pipes 12 and the cooling tower outlet pipes 13 of adjacent sets of cooling tower bodies 1 are connected through the first connecting pipes 14 to form a parallel water circulation loop.

[0039] The intelligent control cabinet 15 is installed on the side of the cooling tower body 1; the control output terminal of the intelligent control cabinet 15 is electrically connected to the cooling component 11, and the alarm mechanism 16 is installed on the top of the intelligent control cabinet 15 and is electrically connected to the control terminal of the intelligent control cabinet 15.

[0040] Specifically: Two sets of parallel-connected cooling tower bodies 1, together with the first connecting pipe 14, connect the cooling tower inlet pipe 12 and cooling tower outlet pipe 13 of each tower to form a parallel water circulation loop that serves as a backup for each other. During operation, the interconnection characteristics of the loop can realize the secondary equalization of cooling water flow between each tower, avoiding heat exchange imbalance caused by single tower pipe flow deviation or local blockage. The cooling component 11 can complete the forced convection heat exchange between circulating cooling water and ambient air in the heat exchange chamber. The intelligent control cabinet 15 can realize centralized collection, calculation and control of the entire system's operating status. The alarm mechanism 16 can quickly trigger early warning when the system operating parameters exceed the limit or the equipment fails, improving the redundancy and stability of the system operation, and providing reliable hardware loop support for the dynamic and refined distribution of heat load.

[0041] Example 2

[0042] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 10 As shown below, see details:

[0043] In a preferred embodiment, the actuator 2 integrated on the side of the intelligent control cabinet 15 serves as the terminal execution core for system control commands. During operation, it can receive control signals issued by the intelligent control cabinet 15 through the wiring port 21 and convert them into drive electrical signals for the corresponding execution unit. At the same time, it can collect its own and the corresponding execution equipment's operating status parameters in real time through the built-in operating condition detection unit, and provide hierarchical visual status feedback through the operating condition indicator 22. The display screen 23 can simultaneously display the currently issued control parameters and real-time equipment operating data. The operation button 24 can realize on-site local command correction and manual emergency control, achieving accurate conversion and execution of control signals.

[0044] As a preferred implementation, the runtime interactive panel 31 can complete the input of all system operating parameters and the setting of protection thresholds. Multiple control buttons 32 can realize the emergency shutdown, start-stop control and switching between automatic or manual operation modes of the system. The indicator 33 can provide real-time feedback on the power supply status and main circuit operation status of the system. The corresponding indicator lights in the indicator light grid 34 can independently display the operation, standby and fault status of each cooling tower body 1, which can realize centralized management and visualization of all system parameters and status. At the same time, it can quickly locate the abnormal operation of a single tower and shorten the fault diagnosis time.

[0045] As a preferred embodiment, the alarm mechanism 16 installed on the top of the intelligent control cabinet 15 realizes graded early warning of system anomalies. During operation, the support rod 4 can raise the sound unit 41 and the alarm light 42 to a high position to avoid the attenuation of the early warning signal caused by the obstruction of the field equipment. When the fault diagnosis unit detects that the system operating parameters exceed the limit or the equipment execution unit fails, it can simultaneously drive the sound unit 41 to emit a buzzer warning sound, and at the same time drive the alarm light 42 to switch the corresponding light color and flashing frequency according to the fault level, so as to realize the dual graded early warning of sound and light, improve the fault response speed of the system, and distinguish the fault level by sound and light signals, so as to facilitate the maintenance personnel to quickly judge the severity of the anomaly.

[0046] In a preferred embodiment, the cooling tower heat exchange plate 5 installed inside the cooling tower body 1 serves as the core heat exchange element. During operation, the circulating water to be cooled flows at a constant speed in the closed flow channel of the cooling tower heat exchange plate 5. The protective shell 52 can isolate external debris from corroding the heat exchange element. The air inlet louvers 51 can guide ambient air into the heat exchange chamber in a direction perpendicular to the heat exchange surface of the heat exchange plate, and complete sufficient forced convection heat exchange with the cooling water in the heat exchange plate. The heat dissipation component 53 at the top can quickly discharge the hot air after heat exchange into the heat exchange chamber, forming a continuous and stable heat exchange air path, which greatly improves the heat exchange efficiency between the cooling water and the ambient air, reduces the heat exchange dead zone, and reduces the frequency of daily maintenance of the equipment.

[0047] In a preferred embodiment, the cooling fan 6 serves as the power core of the heat exchange air path. During operation, it can receive the frequency conversion drive signal sent by the actuator 2 and adjust its own speed in real time to match the heat load allocated to the current single tower, thereby realizing dynamic adjustment of the heat exchange capacity. The fan shroud 61 can cover the outside of the impeller of the cooling fan 6 to avoid safety hazards caused by the high-speed rotation of the impeller. At the same time, it can constrain the airflow to flow vertically. The multiple sets of through holes 62 on the top surface of the shroud can realize uniform diffusion of the exhaust air, avoiding the problem of heat exchange efficiency reduction caused by the hot air flowing back to the air inlet side after heat exchange. This realizes the adjustment of the cooling air volume to match the heat exchange requirements under different loads, while effectively preventing the backflow of hot air.

[0048] In a preferred embodiment, the sensor assembly 71 is locked and fixed to the outer wall of the cooling tower inlet pipe 12 and cooling tower outlet pipe 13 by the installation strap 7. During operation, the temperature, flow and pressure sensors integrated in the sensor assembly 71 can synchronously collect the real-time operating parameters of the cooling water in the corresponding pipes, and quickly convert the collected analog signals into digital signals and upload them to the intelligent control cabinet 15 without delay, providing basic data for the real-time calculation of the total heat load of the system and providing data support for dynamic load distribution.

[0049] As a preferred embodiment, the electric valve body 8 installed in the cooling tower inlet pipe 12 and cooling tower outlet pipe 13 realizes automatic and precise control of the cooling water flow of a single tower branch. Under normal operating conditions, it can receive the drive signal of the actuator 2 to complete the automatic adjustment of the valve opening to match the heat load requirements of the single tower. The transmission rod 81 at the top of the valve stem can be manually rotated to adjust the valve opening by rotating the handwheel 82 fixed at its top. This adjustment method is only used in emergency situations such as equipment maintenance, system power failure, or failure of electric control. It can realize manual on / off of the pipeline and fine adjustment of the flow, avoiding pipeline control problems caused by electric failure.

[0050] In a preferred embodiment, the cooling water pump assembly 9 serves as the power core of the entire parallel water circulation loop. During operation, the pump body 91 can receive the variable frequency drive signal from the actuator 2 and adjust its own operating frequency and output flow in real time to accurately match the circulating water demand corresponding to the current total heat load of the system, avoiding energy waste caused by redundant operation of the pump. The inlet and outlet of the pump body 91 are connected to the system pipeline through the second connecting pipe 92 to achieve a flange-type rigid seal connection, which can effectively prevent leakage of high-pressure circulating water. At the same time, it is convenient for the pump to be quickly disassembled, maintained, and replaced, realizing stepless and precise adjustment of the cooling water circulation flow rate to match the circulation demand under different heat loads and significantly reducing the operating energy consumption of the pump.

[0051] As a preferred embodiment, the control method for cooling tower group control equipment based on dynamic heat load distribution includes the following steps:

[0052] Step 1: Input the heat exchange parameters of each cooling tower body 1 through the interactive panel 31 of the intelligent control cabinet 15, set the cooling water supply temperature, operation protection limit and control mode, execute the system full loop pre-start self-test, and confirm that each electric valve body 8, cooling water pump assembly 9, cooling fan 6 and alarm mechanism 16 are in standby ready state.

[0053] Step 2: After the system starts up, the sensor assembly 71 distributed on the cooling tower inlet pipe 12 and cooling tower outlet pipe 13 collects the cooling water inlet temperature, outlet temperature, real-time flow rate and pipeline pressure data of each branch and main pipeline in real time. At the same time, the ambient temperature and humidity parameters are collected. All collected data are uploaded to the intelligent control cabinet 15 in real time. The intelligent control cabinet 15 calculates the current total heat load demand of the cooling system in real time and monitors the operating parameters of each equipment unit in real time.

[0054] Step 3: Based on the calculated total system heat load and the efficient operating range of each cooling tower body 1, the controller generates a heat load distribution scheme for the parallel multi-tower system, determining the optimal number of operating cooling tower bodies 1 and the load distribution ratio per tower. The controller sends coordinated control commands to each execution unit through actuator 2, correspondingly adjusting the opening degree of the electric valve body 8 to match the inlet water flow of a single tower, adjusting the operating frequency of the cooling water pump assembly 9 to match the total circulating water volume of the system, and adjusting the speed of the cooling fan 6 to match the heat exchange load allocated to a single tower, so that all operating cooling tower bodies 1 are in the preset efficient heat exchange range, achieving dynamic and balanced distribution of the total system heat load. At the same time, the controller compares the operating parameters with the set thresholds in real time. When the parameters exceed the limits or the equipment malfunctions, the alarm mechanism 16 is triggered to activate the audible and visual alarm and execute the corresponding protection and control actions.

[0055] In this embodiment, the alarm light 42, cooling tower heat exchange plate 5, electric valve body 8, and water pump body 91 are all commercially available devices known to those skilled in the art. They can be customized or selected according to actual needs. Here, we are only using them without making any structural or functional improvements, and we will not go into detail here.

[0056] The working process of this application is as follows: After the system completes its self-test, it enters the operating state. First, the sensor assembly 71, which is rigidly fixed to the cooling tower inlet pipe 12 and cooling tower outlet pipe 13 by the installation strap 7, collects the cooling water inlet and outlet water temperature, real-time flow rate, and pipeline pressure data of each single tower branch and the main system pipeline, and simultaneously collects the ambient temperature and humidity parameters. All collected electrical signals are transmitted in real time to the core controller of the intelligent control cabinet 15 on the side. The controller combines the inlet and outlet water temperature difference, cooling water flow rate, and real-time calculation of the current total demand heat load of the system to simultaneously complete the branch heat load calculation of each single tower branch, providing accurate data support for subsequent load distribution.

[0057] The controller aims for optimal overall system energy efficiency. Combining pre-entered rated heat exchange parameters and high-efficiency operating range thresholds for each cooling tower body 1, it determines the optimal number of operating cooling tower bodies 1, the load distribution ratio per tower, and corresponding operating parameters under the current operating conditions. Subsequently, the controller issues coordinated control commands through actuator 2. Actuator 2, via the control cable connected to terminal 21, issues commands to the corresponding execution units to adjust the operating frequency of the pump body 91 within the cooling water pump assembly 9, matching the total circulating water volume of the system through the second connecting pipe 92; adjusting the speed of the cooling fan 6 to cooperate with the cooling tower heat exchange plate 5 within the cooling tower body 1 to complete heat exchange; and guiding the airflow directionally through the fan shroud 61 and top through-hole 62 outside the cooling fan 6, enhancing heat exchange efficiency. Simultaneously, the cooling tower inlet pipe 12 and cooling tower outlet pipe 13 of adjacent cooling tower bodies 1 are connected through the first connecting pipe 14 to form a parallel loop, achieving a balanced distribution of flow in each branch, ensuring that all operating cooling tower bodies 1 are stably in the high-efficiency heat exchange range, and achieving a dynamic and balanced distribution of the total heat load.

[0058] Meanwhile, the sensor assembly 71 continuously transmits the adjusted operating data, and the controller compares the actual parameters with the set target values ​​in real time, dynamically corrects the control commands, eliminates parameter deviations caused by operating condition fluctuations, and ensures that the cooling water supply temperature remains stable within the set range. The interactive panel 31 and control buttons 32 on the main body 3 of the control cabinet can realize on-site parameter adjustment, and the operating status indicator 22 on the actuator 2, the indicator 33 and indicator grid 34 on the control cabinet display the equipment operating status in real time. Among them, the transmission rod 81 of the electric valve body 8 can be manually rotated by rotating the handwheel 82 fixed on its top to adjust the valve opening for manual on / off and flow fine adjustment in equipment maintenance, emergency shutdown or power failure conditions; when the system has abnormalities such as parameter over-limit or equipment failure, the controller immediately triggers the alarm mechanism 16, and activates the sound and light alarm through the sound unit 41 and alarm light 42 on the top of the support rod 4, and simultaneously displays the fault location information on the display screen 23, ensuring the stability and safety of the system operation in all aspects; the above is the working principle of the cooling tower group control equipment and its control method based on dynamic heat load distribution.

Claims

1. A cooling tower group control device based on dynamic distribution of heat load, comprising two groups of parallelly arranged cooling tower bodies (1), and cooling assemblies (11), cooling tower water inlet pipes (12), cooling tower water outlet pipes (13), first connecting pipes (14), intelligent control cabinets (15) and alarm mechanisms (16) arranged in pairs with the cooling tower bodies (1), characterized in that: The cooling component (11) is installed in the heat exchange chamber inside the cooling tower body (1); the outlet end of the cooling tower inlet pipe (12) is connected to the inlet of the cooling component (11); the inlet end of the cooling tower outlet pipe (13) is connected to the outlet of the cooling component (11), and the cooling tower inlet pipes (12) and the cooling tower outlet pipes (13) of two adjacent cooling tower bodies (1) are connected by the first connecting pipe (14); The intelligent control cabinet (15) is installed on the side of the cooling tower body (1); the control output terminal of the intelligent control cabinet (15) is electrically connected to the cooling component (11); the alarm mechanism (16) is installed on the top of the intelligent control cabinet (15) and is electrically connected to the control terminal of the intelligent control cabinet (15).

2. The cooling tower group control device based on dynamic distribution of heat load according to claim 1, characterized in that: An actuator (2) is installed on one side of the intelligent control cabinet (15), and the actuator (2) housing is provided with a wiring port (21), a status indicator (22), a display screen (23) and operation buttons (24); the wiring port (21) is electrically connected to the cooling component (11) and the intelligent control cabinet (15) through a control cable; the status indicator (22) is electrically connected to the actuator (2) detection unit.

3. The cooling tower group control device based on dynamic distribution of heat load according to claim 2, characterized in that: The intelligent control cabinet (15) includes a control cabinet body (3); one side of the control cabinet body (3) is integrated with an interactive panel (31), multiple sets of control buttons (32), an indicator (33) and an indicator light grid (34); the interactive panel (31) is a touch panel, used for setting equipment parameters and monitoring operating status; the control buttons (32) include an emergency stop button, a start / stop button and a mode switching button; the indicator (33) is used to display the power supply and operation status of the equipment; the indicator light grid (34) is equipped with an operating indicator light that corresponds one-to-one with each cooling tower body (1).

4. The cooling tower group control device based on dynamic distribution of heat load according to claim 1, characterized in that: The alarm mechanism (16) includes a support rod (4), a sound unit (41), and an alarm light (42); the bottom of the support rod (4) is fixed to the top of the intelligent control cabinet (15); the sound unit (41) and the alarm light (42) are installed on the top of the support rod (4); the sound unit (41) is a buzzer for sound and light alarm; the sound unit (41) and the alarm light (42) are both electrically connected to the fault diagnosis unit of the intelligent control cabinet (15).

5. The cooling tower group control device based on dynamic distribution of heat load according to claim 1, characterized in that: The cooling assembly (11) includes a cooling tower heat exchange plate (5), which is provided with a protective shell (52) on the outside. The cooling tower heat exchange plate (5) is provided with air inlet louvers (51) on the side. The cooling tower body (1) is equipped with a heat dissipation assembly (53) on the top. The cooling tower heat exchange plate (5) is located in the heat exchange chamber of the cooling tower body (1), and the air inlet direction of the air inlet louvers (51) is opposite to the heat exchange surface of the cooling tower heat exchange plate (5).

6. The cooling tower group control device based on dynamic distribution of heat load according to claim 5, characterized in that: The heat dissipation assembly (53) also includes a heat dissipation fan (6); the heat dissipation fan (6) is covered with a fan shroud (61); the top surface of the fan shroud (61) has multiple sets of through holes (62); the drive end of the heat dissipation fan (6) is electrically connected to the intelligent control cabinet (15) and the actuator (2).

7. The cooling tower group control device based on dynamic distribution of heat load according to claim 1, characterized in that: Sensor assemblies (71) are fixedly installed on both the cooling tower inlet pipe (12) and the cooling tower outlet pipe (13) by installation straps (7); the sensor assembly (71) includes a temperature sensor, a flow sensor and a pressure sensor, and the signal output end of the sensor assembly (71) is electrically connected to the intelligent control cabinet (15).

8. The cooling tower group control device based on dynamic distribution of heat load according to claim 7, characterized in that: Electric valve bodies (8) are installed on both the cooling tower inlet pipe (12) and the cooling tower outlet pipe (13); a transmission rod (81) is installed on the top of the valve stem of the electric valve body (8); a handwheel (82) is also fixed to the top of the transmission rod (81); the electric valve body (8) is used to adjust the cooling water flow of the corresponding pipe; the handwheel (82) is used to manually adjust the opening and closing of the valve for maintenance and emergency conditions.

9. The cooling tower group control device based on dynamic distribution of heat load according to claim 8, characterized in that: A cooling water pump assembly (9) is installed on one side of the cooling tower body (1); the cooling water pump assembly (9) includes a pump body (91); the inlet and outlet of the pump body (91) are connected to the cooling tower outlet pipe (13) and the cooling water return main pipe respectively through the second connecting pipe (92); the drive end of the pump body (91) is electrically connected to the intelligent control cabinet (15) and the actuator (2) to adjust the cooling water circulation flow rate.

10. A control method of a cooling tower group control device based on dynamic distribution of thermal load, which applies the cooling tower group control device based on dynamic distribution of thermal load according to any one of claims 1 to 9, characterized in that: The control method includes the following steps: Step 1: Input the heat exchange parameters of each cooling tower body (1) through the interactive panel (31) of the intelligent control cabinet (15), set the cooling water supply temperature, operation protection limit and control mode, perform the system full circuit pre-start self-test, and confirm that each electric valve body (8), cooling water pump assembly (9), cooling fan (6) and alarm mechanism (16) are in standby ready state; Step 2: After the system starts running, the sensor assembly (71) distributed on the cooling tower inlet pipe (12) and cooling tower outlet pipe (13) collects the cooling water inlet temperature, outlet temperature, real-time flow rate and pipeline pressure data of each branch and main pipeline in real time, and collects the ambient temperature and humidity parameters at the same time. All collected data are uploaded to the intelligent control cabinet (15) in real time. The intelligent control cabinet (15) calculates the current total heat load demand of the cooling system in real time and monitors the operating parameters of each equipment unit at the same time. Step 3: Based on the calculated total heat load of the system and combined with the high-efficiency operating range of each cooling tower body (1), the controller generates a heat load distribution scheme for the parallel multi-tower system, and determines the optimal number of operating cooling tower bodies (1) and the load distribution ratio of a single tower. The controller sends coordinated control instructions to each execution unit through the actuator (2), correspondingly adjusting the opening degree of the electric valve body (8) to match the water inlet flow of a single tower, adjusting the operating frequency of the cooling water pump assembly (9) to match the total circulating water volume of the system, and adjusting the speed of the cooling fan (6) to match the heat exchange load distributed to a single tower, so that all operating cooling tower bodies (1) are in the preset high-efficiency heat exchange range, and realize the dynamic balanced distribution of the total heat load of the system. At the same time, the controller compares the operating parameters with the set threshold in real time. When the parameters exceed the limit or the equipment malfunctions, the alarm mechanism (16) is triggered to start the audible and visual alarm and execute the corresponding protection and control actions.

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