Tunnel power distribution cabinet dehumidification control system

Abstract

The utility model relates to the technical field of power distribution cabinet dehumidification, in particular to a tunnel power distribution cabinet dehumidification control system which comprises a temperature and humidity sensing module, a dew point sensing module, a water level sensing module, a control module, a dehumidifier and a drainage device. The dew point sensing module, the water level sensing module, the dehumidifier and the drainage device are all arranged outside the tunnel power distribution cabinet, the water level sensing module is arranged on the drainage device, and the control module is electrically connected with the temperature and humidity sensing module, the dew point sensing module, the water level sensing module, the dehumidifier and the drainage device. The humidity change of the internal and external environments of the power distribution cabinet can be monitored in real time, so that the temperature and the humidity in the power distribution cabinet are always kept in a proper temperature and humidity range, the service life of equipment is prolonged, and the safety and the reliability of a power distribution system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dehumidification of power distribution cabinets, in particular to a dehumidification control system for a tunnel power distribution cabinet. Background Art

[0002] With the acceleration of urbanization, the construction of various types of tunnels is expanding. Tunnel power distribution cabinets, as a vital component of the power supply system, undertake the critical tasks of power transmission, distribution, and control. However, the tunnel environment is characterized by high humidity, poor ventilation, and drastic temperature fluctuations. This makes the electrical components within the distribution cabinets susceptible to moisture, oxidation, and corrosion. This not only seriously shortens the service life of the equipment but can also cause safety accidents.

[0003] In the existing technology, some dehumidifier control systems for tunnel power distribution cabinets have been proposed and applied, generally including the following:

[0004] 1. Traditional heating dehumidification system: This system heats the air using an electric heater built into the distribution cabinet, thereby reducing relative humidity. This method is simple and low-cost, but suffers from high energy consumption. In addition, because this system usually relies on timing or manual control, it cannot intelligently adjust to the actual ambient humidity, which can easily lead to overheating of electrical equipment and unnecessary energy waste.

[0005] 2. Cooling and dehumidification system: This system uses small refrigeration equipment to remove excess moisture by lowering the air temperature to condense water vapor in the humid air. Although this method has a significant dehumidification effect in high-temperature and high-humidity environments, its dehumidification efficiency is often insufficient in the low-temperature environment of tunnels. At the same time, the long-term operation of the refrigeration equipment also requires high maintenance costs, and its large size makes it unsuitable for installation in the limited space of tunnel distribution cabinets.

[0006] 3. Adsorption dehumidification system: This system uses hygroscopic materials (such as silica gel or molecular sieves) to absorb moisture from the air to achieve a dehumidification effect. This type of system can effectively reduce humidity during initial operation, but as the hygroscopic material gradually becomes saturated, its dehumidification capacity will significantly decrease, and the hygroscopic material needs to be replaced or regenerated regularly. This not only increases the maintenance workload but also leads to increased operating costs. In addition, due to the inability to monitor and automatically adjust humidity in real time, this type of system has poor adaptability in the complex and changing tunnel environment.

[0007] Although the above existing technologies can meet basic requirements in some application scenarios, they still have many shortcomings in the special environment of tunnels, mainly including:

[0008] 1. Low level of automation and intelligence: Most existing dehumidification systems rely on timers or manual adjustments and are unable to automatically adjust to real-time changes in humidity in the tunnel, resulting in unstable dehumidification effects and energy waste. Each dehumidifier is controlled individually, and the backend cannot obtain temperature and humidity data from the distribution cabinet. When problems with the dehumidification device occur, they cannot be discovered in a timely manner.

[0009] 2. High energy consumption: Traditional heating and cooling dehumidification systems have high energy consumption, especially when they are running for a long time or when the ambient temperature and humidity change drastically, the energy consumption problem is particularly prominent.

[0010] 3. High maintenance cost: Although the adsorption dehumidification system has a good dehumidification effect in the initial stage, it needs to be replaced or regenerated regularly due to the saturation of the moisture-absorbing material, resulting in high maintenance costs. When the dehumidifier installed inside the counter is damaged and repaired, the high-voltage cabinet needs to be powered off, which will cause inconvenience in production and use and affect economic benefits.

[0011] 4. Poor adaptability: Existing technologies are unable to cope with the complex environment in tunnels, especially under extreme temperature and humidity conditions. The system often fails to perform its dehumidification function normally, which in turn affects the safety and equipment life of the distribution cabinet. The heating plate of the existing dehumidification system dehumidifies the humid air by increasing the temperature inside the cabinet through water vapor. However, the humid air is still in the electrical cabinets, communication cabinets and other live cabinets. If the external environment cools down significantly, the humid air will precipitate and form condensation, endangering the operation of the equipment. Due to the certain size of small dehumidifiers, the busbar compartment and the circuit breaker compartment are separated by a partition inside the cabinet, and the small dehumidifier is only installed in the cable compartment, so it cannot dehumidify the busbar compartment and the circuit breaker compartment.

[0012] In summary, the existing technology has many shortcomings when facing the dehumidification needs of tunnel distribution cabinets. There is an urgent need for a dehumidification control system that can be intelligently adjusted, has low energy consumption, is easy to maintain and has strong adaptability. Utility Model Content

[0013] The technical problem to be solved by the utility model is to provide a tunnel distribution cabinet dehumidification control system, which can monitor the humidity changes in the environment inside and outside the distribution cabinet in real time, so as to ensure that the temperature and humidity in the distribution cabinet are always maintained within an appropriate temperature and humidity range, thereby extending the service life of the equipment and improving the safety and reliability of the distribution system.

[0014] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0015] A dehumidification control system for a tunnel power distribution cabinet includes a temperature and humidity sensing module, a dew point sensing module, a water level sensing module, a control module, a dehumidifier, and a drainage device. The temperature and humidity sensing module is arranged inside the tunnel power distribution cabinet, the dew point sensing module, the water level sensing module, the dehumidifier, and the drainage device are all arranged outside the tunnel power distribution cabinet, and the water level sensing module is arranged on the drainage device. The control module is electrically connected to the temperature and humidity sensing module, the dew point sensing module, the water level sensing module, the dehumidifier, and the drainage device, respectively.

[0016] Furthermore, the temperature and humidity sensing module includes a current transformer T1, a voltage regulator U1, a humidity sensor U3 and a RF chip U2. The bidirectional data transmission end of the RF chip U2 is electrically connected to the bidirectional data transmission end of the humidity sensor U3, the clock signal end of the RF chip U2 is electrically connected to the clock signal end of the humidity sensor U3, the power supply end of the RF chip U2 is electrically connected to the power supply end of the humidity sensor U3 and the output end of the voltage regulator U1, respectively, the RF end of the RF chip U2 is electrically connected to the control module, and the power supply end of the voltage regulator U1 is electrically connected to the current transformer T1.

[0017] Furthermore, the temperature and humidity sensing module also includes a rectifier bridge DB1 and a capacitor C1. The third end and the fourth end of the rectifier bridge DB1 are electrically connected to the current transformer T1, the first end of the rectifier bridge DB1 is electrically connected to one end of the capacitor C1 and the power supply end of the voltage regulator U1, respectively, the second end of the rectifier bridge DB1 is electrically connected to the other end of the capacitor C1, and the second end of the rectifier bridge DB1 and the other end of the capacitor C1 are both grounded.

[0018] Furthermore, the temperature and humidity sensor module also includes a Zener diode ZD1, the cathode of the Zener diode ZD1 is electrically connected to the first end of the rectifier bridge DB1, one end of the capacitor C1 and the power supply end of the regulator U1, and the anode of the Zener diode ZD1 is electrically connected to the second end of the rectifier bridge DB1 and the other end of the capacitor C1.

[0019] Furthermore, the temperature and humidity sensing module also includes a capacitor C2, one end of which is electrically connected to the output end of the regulator U1, the power end of the humidity sensor U3 and the power end of the RF chip U2, and the other end of the capacitor C2 is grounded.

[0020] Furthermore, the temperature and humidity sensing module also includes a resistor R1 and a thermistor NTC1, one end of the resistor R1 is electrically connected to the sixth digital input and output terminal of the RF chip U2, and the other end of the resistor R1 is electrically connected to the seventh digital input and output terminal of the RF chip U2 and one end of the thermistor NTC1, respectively, and the other end of the thermistor NTC1 is grounded.

[0021] Furthermore, the dew point sensor module includes a serial port CN1, a chip U4 and a temperature and humidity sensor U5. The model of the chip U4 is MS51BA9AE. The second pin and the fourth pin of the chip U4 are electrically connected to the control module through the serial port CN1. The third pin of the chip U4 is grounded. The fifth pin of the chip U4 is connected to a 3.3V power supply. The eighth pin of the chip U4 is electrically connected to the input and output ends of the temperature and humidity sensor U5. The power supply end of the temperature and humidity sensor U5 is connected to a 3.3V power supply, and the ground end of the temperature and humidity sensor U5 is grounded.

[0022] Furthermore, the water level sensing module includes a water level sensor U9, and an output end of the water level sensor U9 is electrically connected to the control module.

[0023] Furthermore, the control module includes serial port CN5, serial port CN7, chip U7 and wireless receiving chip U8. The model of chip U7 is M483IDAE, the model of wireless receiving chip U8 is CMT2300A, the 20th and 21st pins of the chip U7 are electrically connected to the dew point sensor module through serial port CN7, the 40th pin of the chip U7 is electrically connected to the water level sensor module through serial port CN5, the 33rd pin of the chip U7 is electrically connected to the 12th pin of the wireless receiving chip U8, the 34th pin of the chip U7 is electrically connected to the 11th pin of the wireless receiving chip U8, the 35th pin of the chip U7 is electrically connected to the 10th pin of the wireless receiving chip U8, the 36th pin of the chip U7 is electrically connected to the 9th pin of the wireless receiving chip U8, and the first and second pins of the wireless receiving chip U8 are electrically connected to the temperature and humidity sensor module.

[0024] Furthermore, the tunnel power distribution cabinet is connected to an air inlet pipe and an air outlet pipe, and the air inlet pipe and the air outlet pipe are both provided with solenoid valves, and the solenoid valves on the air inlet pipe and the air outlet pipe are both electrically connected to the control module.

[0025] The beneficial effects of the present invention are:

[0026] This solution is achieved by setting up a temperature and humidity sensor module, a dew point sensor module, a water level sensor module, a control module, a dehumidifier and a drainage device. The dew point sensor module, the water level sensor module, the dehumidifier and the drainage device are all arranged outside the tunnel distribution cabinet, and the water level sensor module is arranged on the drainage device. The control module is electrically connected to the temperature and humidity sensor module, the dew point sensor module, the water level sensor module, the dehumidifier and the drainage device respectively. The temperature and humidity sensor module is arranged inside the tunnel distribution cabinet and can monitor the temperature and humidity of the cabinet environment in real time; the dew point sensor module is installed outside the tunnel distribution cabinet to detect the temperature and humidity of the environment in the air; the water level sensor module is arranged on the drainage device to monitor the water accumulation and ensure automatic The drainage function works normally. When the accumulated water exceeds the warning line, the system will issue a timely warning to prompt maintenance personnel to check whether there are problems such as blockage in the pipes. The control module, as the core processor of the system, is responsible for collecting environmental data such as temperature, humidity, and water level from various sensor modules, and performing data processing and logical control. The tunnel distribution cabinet dehumidification control system designed in this scheme can monitor the temperature and humidity changes inside and outside the tunnel distribution cabinet in real time through multi-sensor fusion technology. The system automatically adjusts the dehumidification mode according to the monitoring data to ensure that the humidity inside the distribution cabinet is always maintained within the set safety range, avoiding electrical equipment from short circuits, corrosion, aging and other problems due to excessive humidity, thereby greatly improving the stability and reliability of the distribution equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the dehumidification control system for the tunnel power distribution cabinet of the present utility model;

[0028] Figure 2 This is a connection block diagram of the dehumidification control system for the tunnel power distribution cabinet of the present utility model;

[0029] Figure 3 This is a circuit diagram of the temperature and humidity sensor module of the dehumidification control system of the tunnel power distribution cabinet of the present utility model;

[0030] Figure 4 This is a circuit schematic diagram of the dew point sensor module of the tunnel power distribution cabinet dehumidification control system of the present utility model;

[0031] Figure 5 This is a circuit diagram of the water level sensor module of the dehumidification control system of the tunnel power distribution cabinet of the present invention;

[0032] Figure 6 This is a circuit schematic diagram of the control module of the dehumidification control system of the tunnel power distribution cabinet of the present utility model;

[0033] Description of labels:

[0034] 1. Temperature and humidity sensor module; 2. Dew point sensor module; 3. Water level sensor module; 4. Control module; 5. Dehumidifier; 6. Drainage device; 7. Tunnel power distribution cabinet. DETAILED DESCRIPTION

[0035] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

[0036] Please refer to Figure 1 and Figure 2 , the technical solution adopted by this utility model is:

[0037] A dehumidification control system for a tunnel power distribution cabinet includes a temperature and humidity sensing module, a dew point sensing module, a water level sensing module, a control module, a dehumidifier, and a drainage device. The temperature and humidity sensing module is arranged inside the tunnel power distribution cabinet, the dew point sensing module, the water level sensing module, the dehumidifier, and the drainage device are all arranged outside the tunnel power distribution cabinet, and the water level sensing module is arranged on the drainage device. The control module is electrically connected to the temperature and humidity sensing module, the dew point sensing module, the water level sensing module, the dehumidifier, and the drainage device, respectively.

[0038] From the above description, it can be seen that the beneficial effects of the present invention are:

[0039] This solution is achieved by setting up a temperature and humidity sensor module, a dew point sensor module, a water level sensor module, a control module, a dehumidifier and a drainage device. The dew point sensor module, the water level sensor module, the dehumidifier and the drainage device are all arranged outside the tunnel distribution cabinet, and the water level sensor module is arranged on the drainage device. The control module is electrically connected to the temperature and humidity sensor module, the dew point sensor module, the water level sensor module, the dehumidifier and the drainage device respectively. The temperature and humidity sensor module is arranged inside the tunnel distribution cabinet and can monitor the temperature and humidity of the cabinet environment in real time; the dew point sensor module is installed outside the tunnel distribution cabinet to detect the temperature and humidity of the environment in the air; the water level sensor module is arranged on the drainage device to monitor the water accumulation and ensure automatic The drainage function works normally. When the accumulated water exceeds the warning line, the system will issue a timely warning to prompt maintenance personnel to check whether there are problems such as blockage in the pipes. The control module, as the core processor of the system, is responsible for collecting environmental data such as temperature, humidity, and water level from various sensor modules, and performing data processing and logical control. The tunnel distribution cabinet dehumidification control system designed in this scheme can monitor the temperature and humidity changes inside and outside the tunnel distribution cabinet in real time through multi-sensor fusion technology. The system automatically adjusts the dehumidification mode according to the monitoring data to ensure that the humidity inside the distribution cabinet is always maintained within the set safety range, avoiding electrical equipment from short circuits, corrosion, aging and other problems due to excessive humidity, thereby greatly improving the stability and reliability of the distribution equipment.

[0040] Furthermore, the temperature and humidity sensing module includes a current transformer T1, a voltage regulator U1, a humidity sensor U3 and a RF chip U2. The bidirectional data transmission end of the RF chip U2 is electrically connected to the bidirectional data transmission end of the humidity sensor U3, the clock signal end of the RF chip U2 is electrically connected to the clock signal end of the humidity sensor U3, the power supply end of the RF chip U2 is electrically connected to the power supply end of the humidity sensor U3 and the output end of the voltage regulator U1, respectively, the RF end of the RF chip U2 is electrically connected to the control module, and the power supply end of the voltage regulator U1 is electrically connected to the current transformer T1.

[0041] From the above description, it can be seen that electromagnetic energy is obtained from the AC bus through the current transformer T1, converted into a stable 3.3V power supply through the voltage regulator U1, and provided with a stable DC power supply to devices such as the RF chip U2 and the humidity sensor U3; the RF chip U2 is responsible for coordinating the working status of each module of the system to ensure the stability and reliability of the system; it is connected to the humidity sensor U3 through the I2C communication interface to realize real-time collection of humidity data; in addition, the RF chip U2 is wirelessly connected to the control module, realizing the wireless transmission function of temperature and humidity data, and sending the collected data to the receiving end to facilitate subsequent data processing and analysis.

[0042] Furthermore, the temperature and humidity sensing module also includes a rectifier bridge DB1 and a capacitor C1. The third end and the fourth end of the rectifier bridge DB1 are electrically connected to the current transformer T1, the first end of the rectifier bridge DB1 is electrically connected to one end of the capacitor C1 and the power supply end of the voltage regulator U1, respectively, the second end of the rectifier bridge DB1 is electrically connected to the other end of the capacitor C1, and the second end of the rectifier bridge DB1 and the other end of the capacitor C1 are both grounded.

[0043] From the above description, it can be seen that after being rectified by the rectifier bridge DB1 and filtered by the capacitor C1, it is converted into a stable DC voltage.

[0044] Furthermore, the temperature and humidity sensor module also includes a Zener diode ZD1, the cathode of the Zener diode ZD1 is electrically connected to the first end of the rectifier bridge DB1, one end of the capacitor C1 and the power supply end of the regulator U1, and the anode of the Zener diode ZD1 is electrically connected to the second end of the rectifier bridge DB1 and the other end of the capacitor C1.

[0045] From the above description, it can be seen that the voltage is stabilized by the voltage regulator ZD1, which can prevent the voltage from exceeding the withstand voltage range of the capacitor C1.

[0046] Furthermore, the temperature and humidity sensing module also includes a capacitor C2, one end of which is electrically connected to the output end of the regulator U1, the power end of the humidity sensor U3 and the power end of the RF chip U2, and the other end of the capacitor C2 is grounded.

[0047] As can be seen from the above description, capacitor C2 is provided to filter out high-frequency noise.

[0048] Furthermore, the temperature and humidity sensing module also includes a resistor R1 and a thermistor NTC1, one end of the resistor R1 is electrically connected to the sixth digital input and output terminal of the RF chip U2, and the other end of the resistor R1 is electrically connected to the seventh digital input and output terminal of the RF chip U2 and one end of the thermistor NTC1, respectively, and the other end of the thermistor NTC1 is grounded.

[0049] From the above description, we can see that resistor R1 plays the role of current limiting and voltage dividing; thermistor NTC1 is used to measure temperature, and the change of temperature is reflected by the change of resistance value.

[0050] Furthermore, the dew point sensor module includes a serial port CN1, a chip U4 and a temperature and humidity sensor U5. The model of the chip U4 is MS51BA9AE. The second pin and the fourth pin of the chip U4 are electrically connected to the control module through the serial port CN1. The third pin of the chip U4 is grounded. The fifth pin of the chip U4 is connected to a 3.3V power supply. The eighth pin of the chip U4 is electrically connected to the input and output ends of the temperature and humidity sensor U5. The power supply end of the temperature and humidity sensor U5 is connected to a 3.3V power supply, and the ground end of the temperature and humidity sensor U5 is grounded.

[0051] Furthermore, the water level sensing module includes a water level sensor U9, and an output end of the water level sensor U9 is electrically connected to the control module.

[0052] Furthermore, the control module includes serial port CN5, serial port CN7, chip U7 and wireless receiving chip U8. The model of chip U7 is M483IDAE, the model of wireless receiving chip U8 is CMT2300A, the 20th and 21st pins of the chip U7 are electrically connected to the dew point sensor module through serial port CN7, the 40th pin of the chip U7 is electrically connected to the water level sensor module through serial port CN5, the 33rd pin of the chip U7 is electrically connected to the 12th pin of the wireless receiving chip U8, the 34th pin of the chip U7 is electrically connected to the 11th pin of the wireless receiving chip U8, the 35th pin of the chip U7 is electrically connected to the 10th pin of the wireless receiving chip U8, the 36th pin of the chip U7 is electrically connected to the 9th pin of the wireless receiving chip U8, and the first and second pins of the wireless receiving chip U8 are electrically connected to the temperature and humidity sensor module.

[0053] Furthermore, the tunnel power distribution cabinet is connected to an air inlet pipe and an air outlet pipe, and the air inlet pipe and the air outlet pipe are both provided with solenoid valves, and the solenoid valves on the air inlet pipe and the air outlet pipe are both electrically connected to the control module.

[0054] Please refer to Figures 1 to 6 As shown, the first embodiment of the present utility model is:

[0055] Please refer to Figure 1 and Figure 2 A dehumidification control system for a tunnel distribution cabinet includes a temperature and humidity sensing module 1, a dew point sensing module 2, a water level sensing module 3, a control module 4, a dehumidifier 5 and a drainage device 6. The temperature and humidity sensing module 1 is arranged inside the tunnel distribution cabinet 7, and the dew point sensing module 2, the water level sensing module 3, the dehumidifier 5 and the drainage device 6 are all arranged outside the tunnel distribution cabinet 7, and the water level sensing module 3 is arranged on the drainage device 6. The control module 4 is electrically connected to the temperature and humidity sensing module 1, the dew point sensing module 2, the water level sensing module 3, the dehumidifier 5 and the drainage device 6 respectively.

[0056] The drainage device 6 collects condensed water generated by the dehumidifier 5 during the dehumidification process through pipes to prevent water droplets from accumulating inside the distribution cabinet; the drainage device 6 is equipped with an automatic drainage system, which can discharge the condensed water by gravity to a designated drainage system or outside the distribution cabinet to prevent moisture accumulation in the distribution cabinet and causing moisture problems; the drainage device 6 has a built-in water level sensor to monitor the water level in the sump or water tank in real time. If the drainage system fails or the water level is too high, the water level sensor will issue an alarm signal to notify maintenance personnel to inspect and handle it to prevent water overflow and damage to the equipment; the drainage device 6 is equipped with an anti-backflow check valve to prevent water in the drain pipe from flowing back into the distribution cabinet, ensuring the dryness of the system; the drainage pipe and connection points of the drainage device 6 have good sealing performance, which can prevent condensed water from leaking into the distribution cabinet or the surrounding environment during the drainage process; the drainage device 6 is made of corrosion-resistant materials, such as stainless steel or corrosion-resistant plastic, to adapt to the harsh environment such as humidity and corrosive gases that may exist in the tunnel; the above designs are all to ensure that the drainage device 6 can maintain stability and reliability during long-term use and reduce maintenance frequency.

[0057] The dehumidifier 5 condenses the moisture in the air into water droplets and discharges them through the internal condenser and evaporator, thereby reducing the air humidity and preventing moisture from accumulating in the distribution cabinet; the dehumidifier 5 is equipped with a fan, which can extract moisture from the inside of the distribution cabinet and recirculate the dry air back into the system to evenly adjust the internal air humidity; the dehumidifier 5 cooperates with the drainage device 6 to automatically discharge the condensed water to the designated drainage location to avoid moisture accumulation in the equipment or the distribution cabinet, preventing moisture from damaging the equipment; the dehumidifier 5 is linked with the control module 4, and automatically starts when the humidity reaches the set threshold, and automatically stops when the humidity drops to a safe range The dehumidifier 5 is automatically stopped to ensure that the equipment only runs when needed, saving energy; the dehumidifier 5 also has a heating function to prevent condensation caused by low temperature; during the dehumidification process, the dehumidifier 5 can prevent the condenser temperature from being too low through the control module 4 to avoid causing condensed water to freeze and affect the normal operation of the equipment; the dehumidifier 5 has a fault self-detection function. If equipment failure occurs, condensed water discharge is not smooth, overload operation occurs, etc., the dehumidifier 5 will automatically stop and issue an alarm to notify maintenance personnel to check and repair; after a short power outage or the fault is eliminated, the dehumidifier 5 can automatically resume operation to ensure system continuity.

[0058] Please refer to Figure 3 The temperature and humidity sensing module 1 includes a current transformer T1, a voltage regulator U1, a humidity sensor U3 and a radio frequency chip U2. The bidirectional data transmission end of the radio frequency chip U2 is electrically connected to the bidirectional data transmission end of the humidity sensor U3, the clock signal end of the radio frequency chip U2 is electrically connected to the clock signal end of the humidity sensor U3, the power supply end of the radio frequency chip U2 is electrically connected to the power supply end of the humidity sensor U3 and the output end of the voltage regulator U1 respectively, the radio frequency end of the radio frequency chip U2 is electrically connected to the control module 4, and the power supply end of the voltage regulator U1 is electrically connected to the current transformer T1.

[0059] Please refer to Figure 3 The temperature and humidity sensor module 1 also includes a rectifier bridge DB1 and a capacitor C1. The third and fourth ends of the rectifier bridge DB1 are electrically connected to the current transformer T1. The first end of the rectifier bridge DB1 is electrically connected to one end of the capacitor C1 and the power supply end of the voltage regulator U1 respectively. The second end of the rectifier bridge DB1 is electrically connected to the other end of the capacitor C1, and the second end of the rectifier bridge DB1 and the other end of the capacitor C1 are both grounded.

[0060] Please refer to Figure 3 The temperature and humidity sensor module 1 also includes a voltage regulator tube ZD1, the cathode of which is electrically connected to the first end of the rectifier bridge DB1, one end of the capacitor C1 and the power supply end of the voltage regulator U1, and the anode of which is electrically connected to the second end of the rectifier bridge DB1 and the other end of the capacitor C1.

[0061] Please refer to Figure 3 The temperature and humidity sensor module 1 also includes a capacitor C2, one end of which is electrically connected to the output end of the regulator U1, the power end of the humidity sensor U3 and the power end of the RF chip U2, and the other end of the capacitor C2 is grounded.

[0062] Please refer to Figure 3 The temperature and humidity sensor module 1 also includes a resistor R1 and a thermistor NTC1. One end of the resistor R1 is electrically connected to the sixth digital input and output terminal of the RF chip U2, and the other end of the resistor R1 is electrically connected to the seventh digital input and output terminal of the RF chip U2 and one end of the thermistor NTC1 respectively. The other end of the thermistor NTC1 is grounded.

[0063] Electromagnetic energy is captured from the AC busbar via current transformer T1, rectified by rectifier bridge DB1, and filtered by capacitor C1 before being converted into a stable DC voltage. To prevent the voltage from exceeding the withstand voltage range of capacitor C1, it is stabilized by voltage regulator diode ZD1. This DC voltage is further converted into a stable 3.3V power supply by voltage regulator U1, providing a stable DC power supply to components such as RF chip U2 and humidity sensor U3. RF chip U2 is responsible for coordinating the operating status of various system modules to ensure system stability and reliability. It has an integrated timer function that can regularly activate sensors for data collection and optimize power consumption. The built-in ADC module in RF chip U2 (using the chip model CC1310) can directly read the temperature sensor signal and convert it into a digital signal to ensure data accuracy. It is connected to the humidity sensor U3 via the I2C communication interface to realize real-time humidity data collection. In addition, the wireless connection between RF chip U2 and control module 4 realizes the wireless transmission function of temperature and humidity data, sending the collected data to the receiving end for subsequent data processing and analysis.

[0064] Please refer to Figure 4 The dew point sensor module 2 includes a serial port CN1, a chip U4 and a temperature and humidity sensor U5. The model of the chip U4 is MS51BA9AE. The second pin and the fourth pin of the chip U4 are electrically connected to the control module 4 through the serial port CN1. The third pin of the chip U4 is grounded. The fifth pin of the chip U4 is connected to a 3.3V power supply. The eighth pin of the chip U4 is electrically connected to the input and output ends of the temperature and humidity sensor U5. The power supply end of the temperature and humidity sensor U5 is connected to a 3.3V power supply, and the ground end of the temperature and humidity sensor U5 is grounded.

[0065] The dew point sensor module 2 also includes a capacitor C3 and a resistor R2. Figure 4 .

[0066] The I / O port of chip U4 is connected to the temperature and humidity sensor U5 through the pull-up resistor R2. The temperature and humidity sensor U5 adopts a simple single bus communication. The data exchange and control of the system in use are completed by the single bus. The temperature and humidity values ​​read from the temperature and humidity sensor U5 each time are the results of the previous measurement. To obtain real-time data, it is necessary to read twice in succession. The interval between each reading of the internal data of the device is greater than 2 seconds to obtain the correct data. The chip U4 is connected to the control module 4 through the serial port CN1, and the environmental temperature and humidity data are uploaded in real time according to the needs of the control module 4. The capacitor C3 is used to filter out high-frequency noise.

[0067] Please refer to Figure 5 The water level sensing module 3 includes a water level sensor U9 , and the output end of the water level sensor U9 is electrically connected to the control module 4 .

[0068] The water level sensor U9 adopts a three-wire connection method, which is convenient for direct connection with the control module 4; the sensor operates in a 5V power supply mode to ensure that it operates under a stable voltage and provides accurate water level detection function; when the water level changes, the output terminal S_OUT1 of the water level sensor U9 will output an analog signal in real time, and the analog voltage value is proportional to the height of the water level; when the water level rises or falls, the signal output of the S_OUT1 terminal will output corresponding changes; after the control module 4 receives the signal from the S_OUT1 terminal, it analyzes the analog signal through the built-in signal analysis algorithm; this process includes converting the analog voltage into a digital signal to determine the specific water level information; the module can make corresponding control decisions based on the results of the analysis.

[0069] Please refer to Figure 6 The control module 4 includes a serial port CN5, a serial port CN7, a chip U7 and a wireless receiving chip U8. The model of the chip U7 is M483IDAE, and the model of the wireless receiving chip U8 is CMT2300A. The 20th and 21st pins of the chip U7 are electrically connected to the dew point sensor module 2 through the serial port CN7. The 40th pin of the chip U7 is electrically connected to the water level sensor module 3 through the serial port CN5. The 33rd pin of the chip U7 is electrically connected to the 12th pin of the wireless receiving chip U8. The 34th pin of the chip U7 is electrically connected to the 11th pin of the wireless receiving chip U8. The 35th pin of the chip U7 is electrically connected to the 10th pin of the wireless receiving chip U8. The 36th pin of the chip U7 is electrically connected to the 9th pin of the wireless receiving chip U8. The first and second pins of the wireless receiving chip U8 are electrically connected to the temperature and humidity sensor module 1.

[0070] The control module 4 also includes a chip U6, a resistor R4, a resistor R5, a capacitor C4, a transistor Q2, a transistor Q3, a resistor R8, a capacitor C5, a resistor R6, a resistor R9, a resistor R10, a serial port CN6, a relay K1, a transistor Q5, a diode D3, a resistor R11, a resistor R12, a resistor R13, a resistor R7, a transistor Q4, a diode Q2, a serial port CN4, a transistor Q1, a resistor R3, a diode D1 and a serial port CN3. For the specific connection relationship between the various components, please refer to Figure 6 ;

[0071] Resistors R3, R4, R7, R8, R9, R11, R12, and R13 act as current limiters; resistors R5 and R6 act as pull-up resistors, providing a stable voltage source and eliminating potential instability; resistor R10 is a pull-down resistor, preventing electrostatic damage and providing a path for charge discharge, preventing the input pin from floating; capacitors C4 and C5 improve circuit stability and response speed, while preventing self-oscillation and misconduction; transistors Q1, Q2, Q3, Q4, and Q5 act as switches; serial port CN6 is connected to the dehumidifier's live wire; relay K1 controls and distributes the high voltage in the circuit by changing the state of its contacts; diodes D1, D2, and D3 provide freewheeling current to prevent voltage surges.

[0072] Chip U7 is responsible for collecting environmental data such as temperature, humidity, and water level from various sensors, and performing data processing and logic control; chip U6 uses a chip model EC800G-CN, which is used to upload the processed data to the remote monitoring platform to achieve real-time monitoring and storage of data; chip U6 connects to the monitoring platform through wireless communication, supports remote data query and status viewing, and improves the visualization and intelligence level of the system; wireless receiving chip U8 uses a chip model CMT2300A, which is used to receive data sent by humidity sensor U3. This chip receives data packets from humidity sensor U3 and transmits them to chip U7 for Processing, thereby realizing wireless monitoring of ambient temperature and humidity; chip U7 receives data from temperature and humidity sensor U5 through serial communication (serial port CN7), and judges the ambient humidity status based on the data to provide a basis for dehumidification control; water level sensor U9 is connected to chip U7 through serial port CN5, chip U7 obtains the analog signal of water level sensor U9, and performs A / D conversion on the signal to obtain real-time water level status information; according to the water level change, the system can adjust the dehumidification strategy in time; relay K1 is used to control the start and stop of dehumidifier 5; chip U7 controls the action of relay K1 according to environmental parameters and set logic to realize the start and stop of dehumidifier 5 On-off control to ensure that the indoor humidity is maintained within the set range; serial port CN3 is connected to the solenoid valve of the air inlet of the air inlet pipe, and serial port CN4 is connected to the solenoid valve of the air outlet of the air outlet pipe; chip U7 controls the opening and closing status of the solenoid valve through these two serial ports, thereby adjusting the air circulation path and optimizing the dehumidification effect; when the system is working, chip U7 continuously monitors the data signals of each sensor, and receives the data of humidity sensor U3 through wireless receiving chip U8; at the same time, the signals of temperature and humidity sensor U5 and water level sensor U9 will also be uploaded to chip U7 through the designated interface, and chip U7 processes these data in real time and controls them according to the set control strategy. The chip U7 controls the dehumidifier 5 and the solenoid valve; when the ambient humidity exceeds the set value, the chip U7 starts the dehumidifier 5 through the relay K1; when the humidity returns to normal or reaches the set target value, the chip U7 controls the relay K1 to turn off the dehumidifier 5, thereby realizing automatic adjustment of the ambient humidity; in addition, the control of the solenoid valve is also dynamically adjusted according to the monitoring data to ensure energy-saving and efficient operation of the system; after data processing, the chip U7 uploads the environmental status, equipment operation information and other data to the monitoring platform through the chip U6, and the monitoring platform stores and analyzes the data, and provides users with maintenance suggestions and optimization solutions to further improve the intelligence level of the system.

[0073] The tunnel power distribution cabinet 7 is connected to an air inlet pipe and an air outlet pipe, and both the air inlet pipe and the air outlet pipe are provided with solenoid valves, and both the solenoid valves on the air inlet pipe and the air outlet pipe are electrically connected to the control module 4.

[0074] When the control module 4 detects that the humidity inside the distribution cabinet is greater than the humidity threshold set by the system, the solenoid valve on the air intake pipe opens the air intake channel, and the humid air in the distribution cabinet enters the dehumidifier 5 through the solenoid valve pipe for dehumidification; at the same time, the control module 4 controls the corresponding solenoid valve to realize the conduction of the pipe of the cabin that needs to be dehumidified, and inputs the dry air output by the dehumidifier 5 into the corresponding distribution cabinet cabin; the solenoid valve is connected to the control module 4, and automatically adjusts the switching state of the air intake and outlet according to the real-time monitoring data (such as humidity and temperature) to ensure that the air humidity in the system is always in the optimal state; the control module 4 can control the switch of the solenoid valve according to preset parameters (such as time period, humidity level), so as to accurately manage the air flow; when the humidity in the distribution cabinet is too high, the solenoid valve can open the air intake channel to introduce the air dried by the dehumidifier 5, and at the same time open the air outlet channel to discharge the moisture, thereby effectively reducing the humidity in the cabinet; after the humidity reaches the set target value, the solenoid valve can The air inlet and outlet channels are partially or completely closed to maintain a stable humidity level and prevent excessive dehumidification. The solenoid valve helps regulate the temperature inside the distribution cabinet by controlling the ratio of air inlet to air outlet. The solenoid valve ensures uniform air flow inside the cabinet by controlling the direction of air flow, avoiding high humidity and high temperature in local areas, and improving the dehumidification effect of the overall system. By regularly switching the state of the solenoid valve, air is prevented from being trapped in certain areas inside the system, thereby reducing the formation and accumulation of condensation water. When the solenoid valve detects an abnormality (such as a stuck valve or abnormal execution), the system will trigger an alarm or switch to a backup channel to prevent equipment failure or humidity control failure due to poor airflow. The solenoid valve status can be integrated with the system monitoring platform to display the valve opening and closing status, airflow conditions and other information in real time for remote monitoring and management. The system can record the number of solenoid valve switches, operating time and fault conditions to provide data support for subsequent maintenance and system optimization.

[0075] The system also includes a power management module (which can be any commercially available power module). The power management module is capable of converting external power into the stable voltage and current required by the system, ensuring that each component of the dehumidification control system (such as the dew point sensor, control module 4, and dehumidifier 5) receives a stable and reliable power supply. This function ensures that each subsystem can operate independently and stably. When the input voltage or output voltage exceeds the set range, the power management module automatically cuts off the power supply or adjusts the output to prevent damage to the equipment due to excessive voltage. When the current exceeds the set safety value, the power management module automatically limits the output current or cuts off the power supply to avoid damage to the equipment due to overload. When a short circuit occurs in the output circuit, the power management module immediately stops supplying power to prevent the short circuit from escalating and causing more serious faults or fire. The power management module has a built-in temperature sensor that can monitor the module's operating temperature. When the temperature is too high, it automatically reduces power or shuts off the power to avoid overheating damage. The power management module uses switching power supply technology to efficiently convert input power into the required output power, reducing energy loss and improving the overall energy efficiency of the system. When the system is in standby or low-load operation, the power management module can automatically reduce its own power consumption to reduce energy waste.

[0076] The tunnel power distribution cabinet dehumidification control system designed in this solution can be applied in the following scenarios:

[0077] 1. Urban subway tunnel:

[0078] In urban subway tunnels, power distribution cabinets are typically located in relatively enclosed underground environments with poor air circulation and consistently high humidity year-round. This is especially true during the summer rainy season or when snow melts in winter, when the humidity inside the tunnels easily reaches saturation. If humidity is not properly controlled, electrical equipment within the distribution cabinets may suffer from short circuits, corrosion, and other issues, severely impacting normal subway operations. The system monitors environmental changes inside and outside the tunnel in real time and automatically adjusts the dehumidification mode to ensure humidity within the distribution cabinets remains within a safe range, minimizing equipment failures.

[0079] 2. Highway tunnels:

[0080] Highway tunnels are often located in mountainous or coastal areas, where humidity fluctuates significantly. This is especially true during rainy or humid seasons, when humidity inside tunnels can rise significantly. In these conditions, the distribution cabinets within the tunnels must be kept constantly dry to ensure the proper functioning of traffic lighting, ventilation, and monitoring systems. The system operates effectively across various seasons and climates, ensuring the proper functioning of the distribution cabinets, whether in winter's low temperatures or summer's high humidity. Intelligent dehumidification and automatic drainage reduce humidity-related equipment damage and maintenance requirements, lowering tunnel management operating costs.

[0081] 3. Mine tunnels:

[0082] Mine tunnels are complex environments, with the air often containing impurities such as dust and water vapor, making humidity a particularly prominent issue. If the equipment within the distribution cabinet becomes damp due to excessive humidity, it can paralyze the mine's power system, impacting mining safety and production efficiency. The system designed in this solution not only dehumidifies but also integrates with other protective measures (such as dust and explosion protection) to ensure that the equipment within the distribution cabinet is always in good operating condition. Furthermore, the system designed in this solution can independently perform humidity monitoring, dehumidification control, and fault alarms, reducing the need for manual inspections and improving the automated management of the mine's power system.

[0083] 4. Undersea Tunnel:

[0084] Due to the unique geographical location of undersea tunnels, the air humidity is extremely high, often accompanied by salt, making it highly corrosive. Electrical equipment within distribution cabinets is more susceptible to moisture and corrosion in this environment, making conventional dehumidification equipment difficult to meet. The multi-mode dehumidification function of the system designed in this solution can be used for heating, cooling, or adsorption dehumidification according to actual needs, ensuring that low humidity conditions can be maintained even in high-humidity and high-salt environments. The system design of this solution focuses on corrosion resistance and waterproofing, ensuring long-term stable operation in the harsh environment of undersea tunnels.

[0085] 5. Power tunnel:

[0086] In urban power tunnels, a large number of power cables and distribution equipment are centrally installed. Excessive humidity can lead to problems such as aging of insulation materials and cable short circuits, affecting the stability of the city's power supply. The system designed in this solution can dynamically adjust the humidity control strategy based on the operating status of cables and equipment to prevent excessive or insufficient dehumidification. The system designed in this solution can be integrated with the power tunnel's overall monitoring system to achieve remote monitoring and fault alarms, providing comprehensive technical support for tunnel operation and management.

[0087] In summary, the utility model provides a tunnel power distribution cabinet dehumidification control system, which is provided by arranging a temperature and humidity sensor module, a dew point sensor module, a water level sensor module, a control module, a dehumidifier and a drainage device. The dew point sensor module, the water level sensor module, the dehumidifier and the drainage device are all arranged outside the tunnel power distribution cabinet, and the water level sensor module is arranged on the drainage device. The control module is electrically connected to the temperature and humidity sensor module, the dew point sensor module, the water level sensor module, the dehumidifier and the drainage device respectively. The temperature and humidity sensor module is arranged inside the tunnel power distribution cabinet and can monitor the temperature and humidity of the cabinet environment in real time; the dew point sensor module is installed outside the tunnel power distribution cabinet for detecting the temperature and humidity of the environment in the air; the water level sensor module is arranged on the drainage device for detecting the temperature and humidity of the environment in the air; the water level sensor module is arranged on the drainage device for detecting the temperature and humidity of the environment in the air; the dew point sensor module is installed on the drainage device for detecting the temperature and humidity of the environment in the air; the water level sensor module is installed ... water level sensor module is installed on the drainage device for detecting the temperature and humidity of the environment in the air; the water level sensor module is installed on the drainage device for detecting the temperature and humidity of the environment in the air. The system is used to monitor water accumulation and ensure the normal operation of the automatic drainage function. When the water accumulation exceeds the warning line, the system will issue a timely warning to prompt maintenance personnel to check whether there are problems such as blockage in the pipes. The control module, as the core processor of the system, is responsible for collecting environmental data such as temperature, humidity, and water level from various sensor modules, and performing data processing and logical control. The tunnel distribution cabinet dehumidification control system designed in this scheme uses multi-sensor fusion technology to monitor the temperature and humidity changes inside and outside the tunnel distribution cabinet in real time. The system automatically adjusts the dehumidification mode according to the monitoring data to ensure that the humidity inside the distribution cabinet is always maintained within the set safety range, avoiding electrical equipment from short circuits, corrosion, aging and other problems due to excessive humidity, thereby greatly improving the stability and reliability of the distribution equipment.

[0088] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A dehumidification control system for a tunnel power distribution cabinet, characterized in that: It includes a temperature and humidity sensing module, a dew point sensing module, a water level sensing module, a control module, a dehumidifier and a drainage device. The temperature and humidity sensing module is arranged inside the tunnel distribution cabinet, the dew point sensing module, the water level sensing module, the dehumidifier and the drainage device are all arranged outside the tunnel distribution cabinet, and the water level sensing module is arranged on the drainage device. The control module is electrically connected to the temperature and humidity sensing module, the dew point sensing module, the water level sensing module, the dehumidifier and the drainage device respectively.

2. The tunnel power distribution cabinet dehumidification control system according to claim 1, characterized in that: The temperature and humidity sensing module includes a current transformer T1, a voltage regulator U1, a humidity sensor U3 and a radio frequency chip U2. The bidirectional data transmission end of the radio frequency chip U2 is electrically connected to the bidirectional data transmission end of the humidity sensor U3, the clock signal end of the radio frequency chip U2 is electrically connected to the clock signal end of the humidity sensor U3, the power supply end of the radio frequency chip U2 is electrically connected to the power supply end of the humidity sensor U3 and the output end of the voltage regulator U1, respectively, the radio frequency end of the radio frequency chip U2 is electrically connected to the control module, and the power supply end of the voltage regulator U1 is electrically connected to the current transformer T1.

3. The dehumidification control system for a tunnel power distribution cabinet according to claim 2, characterized in that: The temperature and humidity sensing module also includes a rectifier bridge DB1 and a capacitor C1. The third and fourth ends of the rectifier bridge DB1 are electrically connected to the current transformer T1. The first end of the rectifier bridge DB1 is electrically connected to one end of the capacitor C1 and the power supply end of the voltage regulator U1, respectively. The second end of the rectifier bridge DB1 is electrically connected to the other end of the capacitor C1, and the second end of the rectifier bridge DB1 and the other end of the capacitor C1 are both grounded.

4. The dehumidification control system for a tunnel power distribution cabinet according to claim 3 is characterized in that: The temperature and humidity sensor module also includes a voltage regulator tube ZD1, the cathode of which is electrically connected to the first end of the rectifier bridge DB1, one end of the capacitor C1 and the power supply end of the voltage regulator U1, and the anode of which is electrically connected to the second end of the rectifier bridge DB1 and the other end of the capacitor C1.

5. The dehumidification control system for a tunnel power distribution cabinet according to claim 2, characterized in that: The temperature and humidity sensing module further includes a capacitor C2, one end of which is electrically connected to the output end of the voltage regulator U1, the power end of the humidity sensor U3 and the power end of the RF chip U2, respectively, and the other end of the capacitor C2 is grounded.

6. The dehumidification control system for a tunnel power distribution cabinet according to claim 2, characterized in that: The temperature and humidity sensing module also includes a resistor R1 and a thermistor NTC1. One end of the resistor R1 is electrically connected to the sixth digital input and output terminal of the RF chip U2. The other end of the resistor R1 is electrically connected to the seventh digital input and output terminal of the RF chip U2 and one end of the thermistor NTC1, respectively. The other end of the thermistor NTC1 is grounded.

7. The tunnel power distribution cabinet dehumidification control system according to claim 1, characterized in that: The dew point sensor module includes a serial port CN1, a chip U4 and a temperature and humidity sensor U5. The model of the chip U4 is MS51BA9AE. The second pin and the fourth pin of the chip U4 are electrically connected to the control module through the serial port CN1. The third pin of the chip U4 is grounded. The fifth pin of the chip U4 is connected to a 3.3V power supply. The eighth pin of the chip U4 is electrically connected to the input and output ends of the temperature and humidity sensor U5. The power supply end of the temperature and humidity sensor U5 is connected to a 3.3V power supply, and the ground end of the temperature and humidity sensor U5 is grounded.

8. The dehumidification control system for a tunnel power distribution cabinet according to claim 1, characterized in that: The water level sensing module includes a water level sensor U9, and an output end of the water level sensor U9 is electrically connected to the control module.

9. The tunnel power distribution cabinet dehumidification control system according to claim 1, characterized in that: The control module includes serial port CN5, serial port CN7, chip U7 and wireless receiving chip U8. The model of chip U7 is M483IDAE, and the model of wireless receiving chip U8 is CMT2300A. The 20th and 21st pins of the chip U7 are electrically connected to the dew point sensor module through serial port CN7, the 40th pin of the chip U7 is electrically connected to the water level sensor module through serial port CN5, the 33rd pin of the chip U7 is electrically connected to the 12th pin of the wireless receiving chip U8, the 34th pin of the chip U7 is electrically connected to the 11th pin of the wireless receiving chip U8, the 35th pin of the chip U7 is electrically connected to the 10th pin of the wireless receiving chip U8, the 36th pin of the chip U7 is electrically connected to the 9th pin of the wireless receiving chip U8, and the 1st and 2nd pins of the wireless receiving chip U8 are electrically connected to the temperature and humidity sensor module.

10. The tunnel power distribution cabinet dehumidification control system according to claim 1, characterized in that: The tunnel power distribution cabinet is connected to an air inlet pipe and an air outlet pipe, and the air inlet pipe and the air outlet pipe are both provided with solenoid valves, and the solenoid valves on the air inlet pipe and the air outlet pipe are both electrically connected to the control module.

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