A device for purifying indoor air and controlling pressure and temperature of a high-voltage frequency converter

Abstract

The utility model relates to air purification auxiliary equipment field, concretely relates to a kind of high pressure frequency converter indoor air purification and pressure, temperature control device. It includes pulse self-cleaning air filter, air conditioning system, centrifugal fan, air outlet pipeline, differential pressure transmitter, S7-200 SMART controller, fan frequency converter, centrifugal fan import pressure sensor, air filter element compressed air backflush pressure sensor, temperature sensor, alarm and communication module. Pulse self-cleaning air filter carries out efficient filtration purification to fresh air into frequency converter room, utilizes the collaborative work of differential pressure transmitter, S7-200 SMART controller and fan frequency converter, and accurately controls indoor pressure and temperature, simultaneously with the aid of monitoring key parameters, and through communication module realizes and the data interaction of central control room, to solve the air purification effect poor, pressure control not accurate, lack of remote monitoring and other problems in prior art, provide good environment for the stable operation of high pressure frequency converter.

Description

Technical Field

[0001] This utility model relates to the field of air purification auxiliary equipment, specifically to a device for indoor air purification and pressure and temperature control using a high-voltage frequency converter. Background Technology

[0002] High-voltage frequency converters are widely used in industrial production, and their normal operation requires stringent environmental conditions. The air quality and temperature of the frequency converter room directly affect the stability, lifespan, and operating efficiency of the equipment. During frequency converter operation, the ambient temperature must be between 10 and 40°C, the ambient air must be free of high concentrations of dust and flammable or explosive gases or dust, and there must be no strong electromagnetic radiation sources nearby. In reality, during the operation of high-voltage frequency converters, their external air circulation cooling mode can create negative pressure inside the frequency converter room, thereby drawing in external dust. If the dust content in the operating environment of the frequency converter is too high, it will directly increase the frequency of maintenance of the frequency converter's ventilation system, and may even require periodic shutdowns for dust removal, posing a serious threat to the stable operation of the high-voltage frequency converter and thus affecting production. Although some existing devices address the dust problem by installing air filters and adjusting the indoor pressure, there are still significant shortcomings in filter status monitoring, comprehensive indoor environmental monitoring, and remote communication. The inability to monitor the air filter element's permeability and remaining lifespan in real time makes it difficult to ensure consistent filtration performance. Furthermore, the lack of effective monitoring of compressed air backflushing pressure hinders timely detection of backflushing system malfunctions. Moreover, existing systems struggle to precisely control the pressure inside the inverter room; pressure imbalances between indoor and outdoor environments can lead to wasted clean air and increased power consumption, or allow unclean outdoor air to flow back, negatively impacting equipment operation. Additionally, the inability to monitor inverter room temperature changes in real time makes it difficult to prevent equipment failures caused by overheating. Moreover, in large industrial settings, the lack of effective remote monitoring and data transmission methods makes it impossible to monitor inverter room environmental parameters in real time, hindering the timely detection and handling of potential problems. Therefore, developing a highly efficient and intelligent air purification and pressure control device for high-voltage inverter rooms is of significant practical importance. Summary of the Invention

[0003] The purpose of this invention is to provide a device for indoor air purification and pressure and temperature control in a high-voltage frequency converter. By adding multiple detection functions and central control room communication functions, it achieves real-time monitoring and control of the air filter element status, compressed air backflushing system, and high-voltage frequency converter room temperature, and supports remote communication, thereby improving the intelligent management level of the equipment and ensuring the stable operation of the high-voltage frequency converter.

[0004] This utility model includes: a pulse self-cleaning air filter, an air conditioning system, a centrifugal fan, an air outlet duct, a differential pressure transmitter, an S7-200 SMART controller, a fan frequency converter, a centrifugal fan inlet pressure sensor, an air filter compressed air backflush pressure sensor, a temperature sensor, an alarm, and a communication module; all components are interconnected through connecting pipes and control lines.

[0005] The centrifugal fan is installed outside the high-voltage frequency converter. The air outlet of the centrifugal fan is connected to the fresh air inlet of the high-voltage frequency converter room, and the air inlet of the centrifugal fan is connected to the air outlet of the pulse self-cleaning air filter. It is used to transport the air outside the high-voltage frequency converter room to the high-voltage frequency converter room.

[0006] The aforementioned pulse self-cleaning air filter has an internal filter element and is equipped with a pulse cleaning system. The pulse self-cleaning air filter is also equipped with an electrical control box.

[0007] The aforementioned centrifugal fan inlet pressure sensor is installed at the air outlet of the pulse self-cleaning air filter, which is also the air inlet of the centrifugal fan. It monitors the inlet pressure in real time and judges the air permeability and remaining service life of the filter element by comparing the pressure data at different stages. When the air permeability of the filter element decreases, causing the inlet pressure to exceed the preset range, it can promptly remind maintenance personnel to replace the filter element.

[0008] The aforementioned compressed air backflush pressure sensor for the air filter element is installed on the compressed air pipeline of the pulse cleaning system to detect the backflush pressure. When the backflush pressure is lower than the set low-pressure threshold, the alarm is triggered to issue an alarm signal, reminding the staff to check the compressed air supply system and the backflush device to ensure that the backflush system is working properly.

[0009] The temperature sensor mentioned above is installed in the high-voltage inverter room to detect the indoor temperature. When the indoor temperature exceeds the preset high temperature threshold, the S7-200 SMART controller will issue an alarm signal and simultaneously start the air conditioning system. It can also be turned on manually. Staff can take corresponding cooling measures according to the actual situation, such as increasing ventilation or starting the air conditioning equipment, to avoid affecting the normal operation of the high-voltage inverter due to excessive temperature.

[0010] The S7-200 SMART controller's internal PID program receives data from the differential pressure transmitter, performs calculations, and then sends control signals to the wind turbine frequency converter.

[0011] The aforementioned fan frequency converter adjusts the speed of the centrifugal fan according to the control signal;

[0012] The aforementioned differential pressure transmitter is installed in the high-voltage frequency converter room to detect the pressure difference between the inside and outside in real time and transmit the data to the S7-200 SMART controller. Based on the received pressure data, the S7-200 SMART controller performs calculations and sends a control signal to the fan frequency converter to adjust the speed of the blower and maintain a slightly positive pressure state in the high-voltage frequency converter room.

[0013] The alarm is connected to the centrifugal fan inlet pressure sensor, the compressed air backflush pressure sensor of the air filter, and the temperature sensor. It will issue an alarm after receiving an abnormal signal.

[0014] The aforementioned communication module supports Ethernet and RS-485 communication protocols to enable data transmission between the device and the central control room. The device will collect data such as the centrifugal fan inlet pressure, the compressed air backflush pressure of the air filter, the inverter room temperature, and the indoor and outdoor pressure difference, and upload them to the central control room through the S7-200 SMART controller. The central control room can also send control commands to the device through the S7-200 SMART controller to achieve remote monitoring and management.

[0015] The air outlet duct of the high-voltage frequency converter room is connected to the air outlet of the high-voltage frequency converter room. The air outlet is equipped with louvers to prevent foreign objects from entering.

[0016] The S7-200 SMART controller includes an internal PID control program.

[0017] Compared with existing technologies, this utility model has the following advantages:

[0018] Comprehensive equipment status monitoring: By monitoring the centrifugal fan inlet pressure, the compressed air backflush pressure of the air filter element, and the inverter chamber temperature in real time, the operating status of the equipment can be fully grasped, potential problems can be detected in time, and equipment failures can be prevented.

[0019] Extend equipment lifespan: Accurately assessing the air permeability and remaining lifespan of the filter element allows for timely replacement, ensuring the filter's effectiveness, reducing dust damage to the high-voltage frequency converter, and extending the equipment's lifespan.

[0020] Improved Operation and Maintenance Efficiency: Supports Ethernet and RS-485 communication protocols, enabling remote communication with the central control room. Staff can monitor the operation of the equipment in real time and perform remote control, greatly improving operation and maintenance efficiency and reducing operation and maintenance costs. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a structural schematic diagram of the present invention.

[0023] Figure 2 This is the schematic diagram of the S7-200 SMART controller of this utility model.

[0024] In the diagram: 1. High-voltage frequency converter room; 2. High-voltage frequency converter; 3. Fresh air inlet of the high-voltage frequency converter room; 4. Centrifugal fan inlet pressure sensor; 5. Air outlet of pulse self-cleaning air filter; 6. Pulse self-cleaning air filter; 7. Compressed air backflush pressure sensor for air filter element; 8. Compressed air pipeline; 9. Filter element; 10. Electrical control box; 11. Air inlet of pulse self-cleaning air filter; 12. Centrifugal fan; 13. Fan frequency converter; 14. Temperature sensor; 15. Differential pressure transmitter; 16. Louver; 17. Air outlet; 18. Air outlet duct. Detailed Implementation

[0025] As shown in the figure, this utility model includes: a pulse self-cleaning air filter 6, an air conditioning system, a centrifugal fan 12, an air outlet duct 18, a differential pressure transmitter 15, an S7-200 SMART controller, a fan frequency converter 13, a centrifugal fan inlet pressure sensor 4, an air filter compressed air backflush pressure sensor 7, a temperature sensor 14, an alarm, and a communication module; all components are interconnected through connecting pipes and control lines.

[0026] Centrifugal fan 12 is installed outside the high-voltage inverter room 1. The air outlet of centrifugal fan 12 is connected to the fresh air inlet 3 of the high-voltage inverter room, and the air inlet of centrifugal fan is connected to the air outlet 5 of pulse self-cleaning air filter. It is used to transport outdoor air of the high-voltage inverter 2 to the high-voltage inverter room.

[0027] The pulse self-cleaning air filter 6 has an air inlet 11 and an air outlet 5. It has a filter element 9 inside and is equipped with a pulse cleaning system. The pulse self-cleaning air filter 6 is equipped with an electrical control box 10.

[0028] The centrifugal fan inlet pressure sensor 4 is installed at the air outlet 5 of the pulse self-cleaning air filter. The centrifugal fan inlet is connected to the air outlet 5 of the pulse self-cleaning air filter. The centrifugal fan inlet pressure sensor 4 detects the pressure at the centrifugal fan inlet in real time and transmits the data to the control unit. When the filter element's permeability decreases due to dust accumulation, the centrifugal fan inlet pressure will change. By comparing it with the preset pressure range, the condition of the filter element can be determined. When the pressure exceeds the range, maintenance personnel are prompted to replace the filter element 9.

[0029] The compressed air backflush pressure sensor 7 is installed on the compressed air pipeline 8 of the pulse cleaning system to monitor the backflush pressure of the compressed air in the pulse cleaning system. When the backflush pressure is lower than the set low pressure threshold, the alarm is triggered to send an alarm signal, reminding the staff to check the compressed air supply system and backflush device to ensure that the backflush system is working properly.

[0030] Temperature sensor 14 is installed in the high-voltage inverter room to continuously monitor the temperature inside the high-voltage inverter room. When the indoor temperature exceeds the preset high temperature threshold, the alarm will sound an alarm signal to remind the staff to take cooling measures. The staff can take corresponding cooling measures according to the actual situation, such as increasing ventilation or starting the air conditioning equipment, to avoid affecting the normal operation of the high-voltage inverter due to excessive temperature.

[0031] The S7-200 SMART controller receives data from the differential pressure transmitter, performs calculations, and sends control signals to the wind turbine frequency converter.

[0032] The frequency converter of the fan adjusts the speed of the centrifugal fan according to the control signal;

[0033] The differential pressure transmitter 15 is installed in the high-voltage frequency converter room to detect the pressure difference between the inside and outside in real time and transmit the data to the S7-200 SMART controller. Based on the received pressure data, the S7-200 SMART controller performs calculations and sends a control signal to the fan frequency converter 13 to adjust the speed of the centrifugal fan and maintain a slightly positive pressure state in the frequency converter room.

[0034] The alarm is connected to the centrifugal fan inlet pressure sensor 4, the air filter compressed air backflush pressure sensor 7, and the temperature sensor 14. It will issue an alarm after receiving an abnormal signal.

[0035] The communication module supports Ethernet and RS-485 communication protocols to enable data transmission between the device and the central control room. The device collects data such as centrifugal fan inlet pressure, air filter compressed air backflushing pressure, inverter room temperature, and indoor / outdoor pressure difference. The communication module then transmits this data to the central control room via Ethernet or RS-485. Control room personnel can monitor the device's operating status in real time using monitoring software and send control commands as needed, enabling remote monitoring and management.

[0036] The air outlet duct 18 of the high-voltage frequency converter room 1 is connected to the air outlet 17 of the high-voltage frequency converter room, and the air outlet 17 is equipped with louvers 16.

[0037] The S7-200 SMART controller includes an internal PID control program. Based on the received differential pressure data, the S7-200 SMART controller performs calculations and sends the results to the fan inverter as control signals. The fan inverter precisely adjusts the centrifugal fan speed according to the control signals, thereby adjusting the fresh air volume entering the high-voltage inverter chamber and achieving precise control of the indoor pressure. When the indoor pressure is lower than the set range, the S7-200 SMART controller controls the fan inverter to increase the centrifugal fan speed, increasing the fresh air intake and raising the indoor pressure; conversely, when the indoor pressure is higher than the set range, it reduces the centrifugal fan speed, decreasing the fresh air intake and lowering the indoor pressure.

[0038] After the device is installed and put into operation, the pulse self-cleaning air filter efficiently filters and purifies the fresh air entering the inverter room. It uses the differential pressure transmitter, S7-200 SMART controller and fan inverter to work together to accurately regulate the indoor pressure. At the same time, it uses various sensors to monitor key parameters in real time and realizes data interaction with the central control room through the communication module. This solves the problems of poor air purification effect, inaccurate pressure control, inconvenient maintenance and lack of remote monitoring in the existing technology, and provides a good environment for the stable operation of high voltage inverters.

Claims

1. A device for indoor air purification and pressure and temperature control using a high-voltage frequency converter, characterized in that... Includes pulse self-cleaning air filters, air conditioning systems, centrifugal fans, air outlet ducts, differential pressure transmitters, S7-200 SMART controllers, fan frequency converters, centrifugal fan inlet pressure sensors, compressed air backflush pressure sensors for air filter elements, temperature sensors, alarms, and communication modules; The centrifugal fan is installed outside the high-voltage frequency converter. The air outlet of the centrifugal fan is connected to the fresh air inlet of the high-voltage frequency converter room, and the air inlet of the centrifugal fan is connected to the air outlet of the pulse self-cleaning air filter. It is used to transport the air outside the high-voltage frequency converter room to the high-voltage frequency converter room. The pulse self-cleaning air filter has an internal filter element and is equipped with a pulse cleaning system. The pulse self-cleaning air filter is also equipped with an electrical control box. The centrifugal fan inlet pressure sensor is installed at the air outlet of the pulse self-cleaning air filter. The centrifugal fan inlet is connected to the air outlet of the pulse self-cleaning air filter. The centrifugal fan inlet pressure sensor detects the pressure at the centrifugal fan inlet in real time and transmits the data to the control unit. The compressed air backflush pressure sensor of the air filter element is installed on the compressed air pipeline of the pulse cleaning system to monitor the backflush pressure of the compressed air in the pulse cleaning system. When the backflush pressure is lower than the set low pressure threshold, the alarm is triggered to issue an alarm signal. The temperature sensor is installed in the high-voltage inverter room to continuously monitor the temperature inside the high-voltage inverter room. When the indoor temperature exceeds the preset high temperature threshold, the alarm will issue an alarm signal. The S7-200 SMART controller receives data from the differential pressure transmitter, performs calculations, and sends control signals to the wind turbine frequency converter. The frequency converter of the fan adjusts the speed of the centrifugal fan according to the control signal; The differential pressure transmitter is installed in the high-voltage frequency converter room to detect the pressure difference between the inside and outside in real time and transmit the data to the S7-200 SMART controller. The S7-200 SMART controller calculates the received pressure data and sends a control signal to the fan frequency converter to adjust the speed of the blower and maintain a slightly positive pressure state in the frequency converter room. The alarm is connected to the centrifugal fan inlet pressure sensor, the compressed air backflush pressure sensor of the air filter element, and the temperature sensor. It will issue an alarm after receiving an abnormal signal. The communication module supports Ethernet and RS-485 communication protocols to enable data transmission between the device and the central control room.

2. The device for indoor air purification and pressure and temperature control using a high-voltage frequency converter according to claim 1, characterized in that... The air outlet duct of the high-voltage frequency converter room is connected to the air outlet of the high-voltage frequency converter room, and the air outlet is equipped with louvers.

3. The device for indoor air purification and pressure and temperature control using a high-voltage frequency converter according to claim 1, characterized in that... The S7-200 SMART controller includes a PID control program.

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