A temperature and humidity control system for a cold rolling mill stockyard

Abstract

The present application belongs to the field of cold rolling plant warehouse area management and control, and specifically relates to a temperature and humidity control system for a cold rolling plant warehouse area, comprising a temperature and humidity sensor, an industrial temperature-regulating and dehumidifying integrated machine, a controller and a communication module. The present application collects warehouse area temperature and humidity data through a double-sensor monitoring point, and the controller intelligently controls the industrial temperature-regulating and dehumidifying integrated machine to perform temperature-raising, temperature-lowering or condensation dehumidifying actions with reference to temperature and humidity threshold values. The present application mainly aims at the problems of energy waste, low efficiency, incomplete coverage and low intelligence level of traditional cold rolling warehouse area temperature and humidity management and control, can be adapted to different scale warehouse areas, accurately maintains the storage environment of the warehouse area, effectively inhibits steel coil corrosion and significantly improves product quality, and simultaneously reduces labor input and energy consumption.

Description

Technical Field

[0001] This invention relates to the field of cold rolling mill warehouse area management, specifically a temperature and humidity control system for cold rolling mill warehouse areas. Background Technology

[0002] Cold-rolled products are typically stored in warehouses while awaiting shipment. Due to the inherent physical and chemical properties of steel, corrosion reactions can easily occur during storage, leading to quality defects on the product surface and affecting customer satisfaction. This is especially true in the frigid Northeast or the humid Jiangnan region, where the warehouse environment deteriorates due to large temperature differences, further accelerating the corrosion reaction and causing quality losses to the cold-rolling plant.

[0003] Currently, methods such as enclosed storage areas, axial flow fan cooling, air curtain heating, and radiator heating are commonly used. However, the axial flow fans, air curtains, and radiators used in storage area temperature and humidity management are all independent and decentralized, and cannot be intelligently started and stopped according to the actual environment of the storage area. This results in serious energy waste. In addition, the working efficiency and energy utilization rate of these facilities are generally low. During operation, continuous on-site monitoring by personnel is required, which consumes a lot of human resources. At the same time, most measures can only control the temperature and cannot effectively regulate the humidity. Furthermore, different storage areas vary in size, and conventional methods are difficult to achieve comprehensive coverage of all steel coils.

[0004] Therefore, developing a temperature and humidity control system for cold rolling mill warehouses that can achieve comprehensive coverage, precise control, and intelligent operation of temperature and humidity, effectively inhibit steel coil corrosion, improve product quality, and reduce energy consumption and labor costs has become an urgent technical problem to be solved in the field of cold rolling mill warehouse management. Summary of the Invention

[0005] The purpose of this invention is to provide a temperature and humidity control system for cold rolling mill warehouses to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a temperature and humidity control system for a cold rolling mill warehouse area, comprising a temperature and humidity sensor, an industrial temperature and humidity control unit, a controller, and a communication module; The temperature and humidity sensor collects temperature and humidity data in the warehouse area in real time and transmits it to the controller. Each monitoring point consists of two temperature and humidity sensors. The single-point detection error is eliminated by taking the average value. The controller receives temperature and humidity data, analyzes and processes it through the control algorithm, generates control signals based on preset temperature and humidity thresholds, and sends them to the industrial temperature and humidity integrated machine through the communication module. The industrial temperature and humidity control unit receives control signals and performs temperature rise, temperature drop, or condensation dehumidification control operations; the communication module enables data transmission and interaction between the controller, temperature and humidity sensors, and the industrial temperature and humidity control unit.

[0007] Furthermore, the preset temperature threshold set in the controller is 15℃~25℃, and the humidity is less than 50% relative humidity.

[0008] Furthermore, the control logic of the industrial temperature and dehumidification integrated unit is as follows: When the temperature is below 15℃, the heating function will be activated to raise the temperature and blow out warm air. When the temperature is above 25℃, the cooling system will be activated to blow out cool air to lower the temperature. When the relative humidity is ≥50%, condensation dehumidification will be activated to reduce the ambient humidity.

[0009] Furthermore, the temperature and humidity sensor is an industrial-grade digital sensor that can collect temperature and humidity data in the warehouse area in real time and accurately. The number of sensors is determined according to the actual area of ​​the cold rolling mill warehouse area. A set of monitoring points is set up every 50㎡ to 80㎡. Each set of monitoring points consists of two sensors, and the distance between the two sensors is controlled between 3m and 5m. By taking the average value, the error of single-point detection is eliminated, and the accuracy of data is improved.

[0010] Furthermore, the communication module adopts a redundant communication method of RS485 wired bus + LoRa wireless module. The core communication link uses RS485 bus with a transmission rate of 9600bps to 19200bps, and the LoRa wireless module serves as a backup link, automatically switching when the wired communication fails.

[0011] Furthermore, the controller is an industrial-grade PLC controller with built-in programmable control algorithms and a touch-screen operation panel.

[0012] Furthermore, the industrial temperature and humidity control unit adopts condensation dehumidification technology, which only realizes the dehumidification function without consuming additional water resources. It is an industrial-grade unit with a cooling capacity of 10kW to 30kW, a heating capacity of 8kW to 25kW, and a dehumidification capacity of 15L / h to 40L / h, and an energy efficiency ratio of ≥3.0.

[0013] Furthermore, for large cold rolling mill warehouses with an area exceeding 5,000 square meters, a zoned control scheme is adopted, dividing the large cold rolling mill warehouse into multiple independent control areas. Each zone is independently equipped with a controller, temperature and humidity sensors, and an integrated industrial temperature and humidity control unit, and data interaction and collaborative control are achieved through industrial Ethernet.

[0014] Compared with the prior art, the beneficial effects of the present invention are: In this invention, by precisely maintaining a suitable storage environment of 15℃~25℃ and relative humidity <50% in the cold rolling warehouse, and by effectively reducing detection errors through data collection by a dual-sensor group, timely response to temperature and humidity control is achieved, thereby suppressing the rust reaction of steel coils from the root, significantly reducing product surface quality defects, and comprehensively improving the storage quality and factory qualification rate of cold-rolled finished products.

[0015] In this invention, by adopting an intelligent automatic operation mode, no manual on-site monitoring is required, which greatly saves human resources. Moreover, the equipment can be flexibly increased or decreased according to the actual size of the storage area to achieve full coverage of the storage area without dead corners. At the same time, the temperature and humidity control equipment is intelligently started and stopped based on real-time environmental data to avoid ineffective energy consumption and waste. While improving the efficiency of storage area management, it effectively reduces production and operation costs. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings; Figure 1 This is a schematic diagram of the overall system structure of the present invention; Figure 2 This is a schematic diagram of the operation method of the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1: Refer to Figure 1 As shown, the present invention proposes a temperature and humidity control system for a cold rolling mill warehouse area, including a temperature and humidity sensor, an industrial temperature and humidity control unit, a controller, and a communication module; The temperature and humidity sensor collects temperature and humidity data in the warehouse area in real time and transmits it to the controller. Each monitoring point consists of two temperature and humidity sensors. The single-point detection error is eliminated by taking the average value. Temperature and humidity sensor selection and layout: Industrial-grade digital temperature and humidity sensors with an accuracy of ±0.5℃ (temperature) and ±3%RH (humidity) were selected. Their measurement range covers -20℃ to 60℃ and 10%RH to 90%RH, meeting the monitoring needs of the cold rolling warehouse under extreme environmental conditions. The number of sensors was determined based on the actual area of ​​the warehouse, following the principle of "setting up one set of monitoring points every 50㎡ to 80㎡." Each set of monitoring points consists of two sensors, with the distance between the two sensors controlled at 3m to 5m to ensure the comprehensiveness and representativeness of the data collection.

[0019] The controller receives temperature and humidity data, analyzes and processes it through the control algorithm, generates control signals based on preset temperature and humidity thresholds, and sends them to the industrial temperature and humidity integrated machine through the communication module. Controller Selection: An industrial-grade PLC controller (e.g., the S7-1200 series) is adopted, featuring multi-channel data acquisition interfaces and high-speed computing capabilities, supporting real-time communication with temperature and humidity sensors and industrial temperature and dehumidification units. The controller has a built-in programmable control algorithm, allowing preset temperature thresholds of 15℃~25℃ and humidity thresholds <50%RH, while also supporting flexible threshold adjustment to adapt to the storage requirements of different cold-rolled products. The controller is equipped with a touch-screen operation panel for easy viewing of real-time data, parameter modification, and troubleshooting.

[0020] Industrial temperature and humidity control units receive control signals and perform temperature rise, temperature drop, or condensation dehumidification regulation operations. Selection and layout of industrial temperature and humidity control units: Choose industrial-grade units with a cooling capacity of 10kW~30kW, a heating capacity of 8kW~25kW, and a dehumidification capacity of 15L / h~40L / h, with an energy efficiency ratio ≥3.0 to meet energy-saving requirements.

[0021] The industrial temperature and humidity control unit adopts condensation dehumidification technology, which requires no additional water consumption during the dehumidification process, making it suitable for use in cold rolling warehouses. Based on the warehouse layout and sensor monitoring range, the locations of the industrial temperature and humidity control units are rationally arranged to ensure that their working range fully covers all steel coil storage areas. The overlap rate of coverage between adjacent units is controlled within 10% to 15% to avoid blind spots in control.

[0022] The communication module enables data transmission and interaction between the controller and temperature and humidity sensors, as well as the industrial temperature and humidity control unit. Communication module configuration: It adopts a wired + wireless redundant communication method. The core communication link uses an RS485 bus (information communication cable) with a transmission rate of 9600bps~19200bps, ensuring data transmission stability and real-time performance. Simultaneously, a LoRa wireless communication module is equipped as a backup link, automatically switching in case of wired communication failure to ensure continuous system operation.

[0023] It should be noted that the system installation and debugging process is as follows: Installation process: First, fix and wire the temperature and humidity sensor to ensure a smooth communication link between the sensor and the controller; second, install the controller and fix it in the warehouse duty room or a convenient location, and connect the power supply and communication lines; then, install and position the industrial temperature and humidity control unit, connect the power supply lines and communication interface, and adjust the installation angle to the optimal coverage; finally, complete the wiring and fixing of the entire system, ensuring that the cables are neatly arranged and clearly labeled, and avoiding tangling, pressure, or other issues.

[0024] Debugging steps: Pre-power-on checks: Verify that the wiring of each component is correct, that the power supply voltage meets the equipment requirements, and check for problems such as short circuits and open circuits.

[0025] Single-point debugging: Start the temperature and humidity sensors separately to verify that their data acquisition function is normal and that the controller can accurately receive and display the data; start the industrial temperature and humidity integrated unit to test whether its cooling, heating and dehumidification functions are normal.

[0026] Linkage debugging: Set the controller threshold parameters and simulate scenarios where the temperature and humidity in the warehouse exceed the standard (such as raising the temperature to 30°C through heating equipment and raising the humidity to 60%RH through humidification equipment) to verify whether the controller can send control signals in a timely manner and whether the industrial temperature and humidity control unit can respond quickly and start the corresponding control functions until the temperature and humidity return to the threshold range and then automatically stop.

[0027] Error calibration: The average value of the data collected by the two sensors at each monitoring point is calculated and compared with the measurement results of the standard temperature and humidity meter to calibrate the sensor error and ensure that the data deviation is ≤±1℃ (temperature) and ≤±5%RH (humidity); at the same time, the control accuracy of the industrial temperature and humidity control unit is tested to ensure that the temperature control deviation is ≤±1℃ and the humidity control deviation is ≤±3%RH.

[0028] Furthermore, the system operation and maintenance methods are as follows: Daily operation: After the system starts up, it enters the automatic operation mode. The temperature and humidity sensors collect environmental data of the warehouse area in real time and transmit the data to the controller every 5 seconds. The controller takes the average value of the two sensor data of each monitoring point and compares it with the preset threshold.

[0029] When the temperature is below 15℃, the controller sends a heating signal, and the industrial temperature-regulating and dehumidifying unit in the corresponding area starts its heating function, blowing warm air until the temperature rises above 15℃. When the temperature is above 25℃, the industrial temperature-regulating and dehumidifying unit starts its cooling function, blowing cool air until the temperature drops below 25℃. When the relative humidity is above 50%, the industrial temperature-regulating and dehumidifying unit starts its condensation dehumidification function until the humidity drops below 50%. During operation, the controller records temperature and humidity data, unit operating status, and fault information in real time, generating an operation log, which can be exported via USB flash drive or uploaded to the enterprise management system via network.

[0030] Maintenance and upkeep: Daily checks: Check the controller display interface to confirm that the system is operating normally and there are no fault alarms; observe the operating status of the all-in-one machine to ensure there is no abnormal noise, water leakage, or other issues.

[0031] Weekly maintenance: Clean the temperature and humidity sensor probe to remove dust, oil, and other impurities to avoid affecting measurement accuracy; check whether the communication line connection is secure and whether the filter screen of the all-in-one machine is clogged, and clean the filter screen of debris in a timely manner.

[0032] Monthly maintenance: Calibrate the temperature and humidity sensors to ensure accurate data acquisition; check the refrigerant pressure and electrical insulation of the integrated unit, and replace worn parts; back up the controller's operating data and parameter settings to prevent data loss.

[0033] Annual maintenance: The integrated unit undergoes a complete disassembly and overhaul, cleaning core components such as the condenser and evaporator, and testing the performance of equipment such as the compressor and fan; the controller software is upgraded to optimize the control algorithm and improve system operating efficiency.

[0034] Furthermore, regarding adaptation to special scenarios, for large cold-rolling warehouses exceeding 5000㎡, a zoned control scheme is adopted: the warehouse is divided into multiple independent control zones, each equipped with an independent controller, sensors, and an integrated industrial temperature and humidity control unit. Data exchange and collaborative control between zones are achieved via industrial Ethernet. For example, a 10000㎡ post-rolling warehouse can be divided into 5 zones, each equipped with an independent control system, allowing for precise adjustment based on the temperature and humidity conditions of each zone, thus avoiding energy waste.

[0035] Example 2: Refer to Figure 2 As shown, the difference between this embodiment and Embodiment 1 is that the present invention proposes a temperature and humidity control system for a cold rolling mill warehouse area, and the steps for using this control system are as follows: Based on the actual size of the storage area, temperature and humidity sensors are placed at different locations to ensure comprehensive monitoring coverage. The key is that every two sensors form a monitoring point, and the average value is used to eliminate errors from single-point detection, making the data more accurate. This establishes the most basic data conditions, providing fundamental data for subsequent controller actions and serving as the initial operating condition for the control system.

[0036] The temperature and humidity data monitored by the sensors are directly transmitted to the controller; When performing this step, the required threshold needs to be preset in the controller. Preferably, the temperature range is 15℃~25℃ and the humidity range is <50% relative humidity, which serves as the data conditions for comparison. If the sensor determines that the actual environmental data is within the threshold range, no special signal processing is performed; it simply continues monitoring. If the data exceeds the range, the next step is taken. This step is the intermediate link in the entire control system, playing a crucial role in connecting the preceding and following steps.

[0037] When adjustment is required, the controller generates a corresponding control signal and sends it to the industrial temperature and humidity control unit via the communication module. After receiving the signal, the industrial temperature and humidity control unit activates its own adjustment function; the specific adjustment function is divided into three types: When the temperature is below 15℃, blow out warm air to raise the temperature. When the temperature is above 25℃, cool air is blown out to lower the temperature. When the relative humidity is greater than 50%, turn on the condensation dehumidification to reduce the ambient humidity.

[0038] It should be noted that this control system was invented to eliminate rust defects and inhibit rusting. Therefore, when controlling humidity, it is only necessary to reduce the humidity, and there is no need to increase the humidity or keep it moist. Thus, when choosing an industrial temperature and dehumidification integrated machine, only a dehumidifier is needed, and there is no need for a machine that consumes additional water energy.

[0039] This step requires ensuring the stability of real-time signal transmission in order to take effective action. This is the final step of the entire control system, which is to actually execute the results and ensure that the environment of the cold rolling mill warehouse area meets the expected goals.

[0040] The working principle of this invention is as follows: During use, temperature and humidity data of the storage area are collected through a dual temperature and humidity sensor group. The controller uses 15℃~25℃ and relative humidity <50% as standard thresholds. The industrial temperature and humidity control unit is automatically controlled by the communication module to complete the heating, cooling and condensation dehumidification regulation. It can accurately stabilize the storage environment of the storage area, realize the comprehensive coverage, precise control and intelligent operation of temperature and humidity in the cold rolling mill storage area, effectively inhibit the rust reaction of steel coils, significantly improve product quality, and reduce energy consumption and labor costs. It is suitable for the use needs of cold rolling storage areas of different sizes and regions.

[0041] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, enabling those skilled in the art to better understand and utilize it. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A temperature and humidity control system for a cold rolling mill warehouse area, characterized in that, Includes temperature and humidity sensors, industrial temperature and humidity control units, controllers, and communication modules; The temperature and humidity sensor collects temperature and humidity data in the warehouse area in real time and transmits it to the controller. Each monitoring point consists of two temperature and humidity sensors. The single-point detection error is eliminated by taking the average value. The controller receives temperature and humidity data, analyzes and processes it through the control algorithm, generates control signals based on preset temperature and humidity thresholds, and sends them to the industrial temperature and humidity integrated machine through the communication module. The industrial temperature and humidity control unit receives control signals and performs temperature rise, temperature drop, or condensation dehumidification control operations; the communication module enables data transmission and interaction between the controller, temperature and humidity sensors, and the industrial temperature and humidity control unit.

2. The temperature and humidity control system for a cold rolling mill warehouse area according to claim 1, characterized in that, The preset temperature threshold set in the controller is 15℃~25℃, and the humidity is less than 50% relative humidity.

3. A temperature and humidity control system for a cold rolling mill warehouse area according to claim 1, characterized in that, The control logic of an industrial temperature and dehumidification integrated unit is as follows: When the temperature is below 15℃, start the heating function to raise the temperature. When the temperature is above 25℃, the cooling system will be activated to lower the temperature. When the relative humidity is ≥50%, start the condensation dehumidification.

4. A temperature and humidity control system for a cold rolling mill warehouse area according to claim 1, characterized in that, The temperature and humidity sensors are industrial-grade digital sensors. The number of sensors is determined based on the actual area of ​​the cold rolling mill warehouse. A set of monitoring points is set up for every 50㎡ to 80㎡. Each set of monitoring points consists of two sensors, and the distance between the two sensors is controlled between 3m and 5m.

5. A temperature and humidity control system for a cold rolling mill warehouse area according to claim 1, characterized in that, The communication module adopts a redundant communication method of RS485 wired bus + LoRa wireless module. The core communication link uses RS485 bus with a transmission rate of 9600bps to 19200bps. The LoRa wireless module serves as a backup link and automatically switches over when the wired communication fails.

6. A temperature and humidity control system for a cold rolling mill warehouse area according to claim 2, characterized in that, The controller is an industrial-grade PLC controller with built-in programmable control algorithms and a touch-screen operation panel.

7. A temperature and humidity control system for a cold rolling mill warehouse area according to claim 3, characterized in that, The industrial temperature and humidity control unit adopts condensation dehumidification technology and is an industrial-grade unit with a cooling capacity of 10kW to 30kW, a heating capacity of 8kW to 25kW, and a dehumidification capacity of 15L / h to 40L / h, with an energy efficiency ratio of ≥3.

0.

8. A temperature and humidity control system for a cold rolling mill warehouse area according to claim 1, characterized in that, For large cold rolling mill warehouses with an area exceeding 5,000 square meters, a zoned control scheme is adopted, dividing the large cold rolling mill warehouse into multiple independent control areas. Each zone is independently equipped with a controller, temperature and humidity sensors, and an integrated industrial temperature and humidity control unit, and data interaction and collaborative control are achieved through industrial Ethernet.

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