Control method and control system of electrostatic air filter

Abstract

The invention relates to the technical field of electrostatic air filters, in particular to a control method and a control system of an electrostatic air filter. Comprising the steps of establishing communication connection with built-in high-voltage power supplies of a plurality of purification units through communication interfaces, monitoring working state parameters of each unit, and accurately positioning a specific unit with a fault when the fault is detected. The system comprises a plurality of purification units and a control device, wherein a high-voltage power supply with a communication function is arranged in each purification unit. Refined monitoring of each unit is achieved through independent addressing, parameters such as voltage and current can be remotely obtained, power calculation can be conducted, grading alarm can be triggered in the case of faults, self-adaptive fault-tolerant operation is supported, for example, the basic purification function is maintained by reducing output voltage. In addition, all operation data can be uploaded to a remote platform to realize intelligent operation and maintenance. Therefore, rapid and accurate positioning of faults, high reliability of system operation and intelligent management are realized, and the maintenance efficiency and economical efficiency are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of electrostatic air filter technology, and specifically to a control method and control system for an electrostatic air filter. Background Technology

[0002] With increasing societal concern about air quality, air purification technologies have been widely adopted in commercial buildings, hospitals, factories, and other locations. Among these, electrostatic adsorption technology, due to its washability, reusability, low resistance, and low energy consumption, has gradually become an important supplement to traditional media filtration technologies. Electrostatic air filters typically use an ionization section to charge particulate matter, followed by a dust collection section to adsorb the charged pollutants. Their core components include an ionization module, a dust collection module, and a high-voltage power supply providing the high-voltage electric field. In large central air conditioning or combined air conditioning units, to meet the demands of high-volume air purification, dozens or even more electrostatic air filter purification units are often installed side-by-side within their purification functional section. These units are arranged in layers, collectively forming the main air handling barrier.

[0003] However, existing technologies for monitoring the operation of multi-purification unit systems have significant drawbacks. The current mainstream approach involves connecting the high-voltage power supplies of these purification units in series with simple power cords, or providing only a single, general passive dry-node fault signal. This daisy-chain connection means that when any purification unit in the system malfunctions (such as a high-voltage short circuit, arcing, or power module failure), the monitoring system only receives a general fault signal indicating "system abnormality," without identifying the specific unit that has the problem. Since the air conditioning unit's door is closed during operation, maintenance personnel cannot directly enter to inspect the interior, making fault location extremely difficult. Maintenance personnel must open each unit individually for inspection, which not only consumes significant time and manpower, extending system downtime, but also severely impacts the continuous and stable operation of the air conditioning system. Furthermore, existing technologies lack the ability to fine-tune the operating status of individual purification units (such as output voltage, current, and power), failing to intelligently adjust for minor unit anomalies and passively waiting for faults to occur before shutting down, thus failing to effectively guarantee purification efficiency. Therefore, there is an urgent need in this field for a technical solution that can individually monitor, accurately locate, and intelligently manage a large number of electrostatic air filters inside an air conditioning unit.

[0004] Therefore, the existing technology still needs further development. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a control method and control system for an electrostatic air filter to solve the problems existing in the prior art.

[0006] To achieve the above-mentioned technical objectives, according to a first aspect of the present invention, the present invention provides a control method for an electrostatic air filter, comprising: S100. Establish a communication connection with the high-voltage power supply of at least one electrostatic air filter purification unit via a communication interface. S200. Monitor the operating status parameters of each of the purification units; S300. When a malfunction is detected in a purification unit based on the working status parameters, the malfunctioning purification unit is located through the communication interface.

[0007] Specifically, the communication interface includes a serial communication interface.

[0008] Specifically, the serial communication interface is an RS485 interface.

[0009] Specifically, the operating status parameters include at least one of the switching status of the high-voltage power supply, the output voltage, and the output current.

[0010] Specifically, the method further includes: calculating the operating power of the purification unit based on the output voltage and output current.

[0011] Specifically, the method further includes: setting a unique device address for the high-voltage power supply of each purification unit, and performing individual addressing through the device address.

[0012] Specifically, the high-voltage power supply can be remotely controlled to turn on and off via the device address.

[0013] Specifically, when a malfunction of the purification unit is detected, the high-voltage power supply is controlled to reduce the output voltage to maintain purification operation.

[0014] Specifically, the working status parameters are transmitted to a remote monitoring platform for real-time alerts and data analysis.

[0015] According to a second aspect of the present invention, a control system for an electrostatic air filter is provided, comprising: At least one purification unit, each purification unit including a built-in high-voltage power supply and a communication interface; The control device is connected to each of the high-voltage power supplies via the communication interface and is configured with the control method described in any of the above-mentioned embodiments.

[0016] Beneficial effects: The electrostatic air filter control method and system provided by this invention bring multiple beneficial effects by introducing an individualized monitoring architecture based on a communication interface, significantly improving the system's intelligence level, reliability, and maintainability.

[0017] Firstly, the most significant benefit of this invention lies in its ability to accurately locate and remotely monitor faults. By configuring an independent device address and communication interface for the high-voltage power supply of each purification unit, the control system can communicate bidirectionally with each unit, acquiring detailed operational status parameters in real time. When any unit malfunctions, the system can immediately and accurately identify the specific number and location of the faulty unit, clearly displaying it on the human-machine interface or remote monitoring platform. This completely changes the traditional "needle-in-a-haystack" fault diagnosis model, enabling maintenance personnel to respond quickly and repair accurately, significantly shortening the average repair time and ensuring the high availability of the air conditioning system. Simultaneously, status data can be remotely transmitted to the cloud, enabling mobile app alarms and remote operation and maintenance management, greatly improving management convenience.

[0018] Secondly, this invention introduces an intelligent fault-tolerant operation mechanism, significantly improving the system's robustness and continuous service capability. Traditional solutions typically employ a simple direct shutdown approach upon detecting a fault, leading to the complete failure of the purification unit. This invention, however, can distinguish between fault types and severity. For certain recoverable or non-fatal anomalies (such as minor arcing caused by dust accumulation), the system can automatically execute strategies, such as appropriately reducing the unit's high-voltage output voltage, allowing it to continue operating in a "derating" state. This adaptive control can suppress faults while maintaining some purification efficiency, avoiding unplanned downtime and creating conditions for planned maintenance. It achieves an intelligent leap from "fault-based shutdown" to "degraded operation after early warning."

[0019] Finally, this invention enables refined monitoring and energy efficiency management of operational status. The system requires no additional electricity meters; it can calculate the operating power of each unit in real time by monitoring its voltage and current, providing a data foundation for energy efficiency assessment and cost analysis.

[0020] In summary, this invention upgrades the electrostatic air filtration system from a single-function passive device into an intelligent system with state perception, intelligent diagnosis, precise control, and remote interconnection capabilities, achieving significant improvements in reliability, maintainability, and economy. Attached Figure Description

[0021] Figure 1 This is a flowchart illustrating the control method for an electrostatic air filter provided in a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the system composition of the electrostatic air filter control system provided in a specific embodiment of the present invention; Figure 3 This is a schematic diagram of the installation position of the electrostatic air filter provided in a specific embodiment of the present invention; Figure 4This is a schematic diagram of the physical layout and communication connection architecture of the control device and the purification unit in the electrostatic air filter control system provided in a specific embodiment of the present invention. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0023] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0024] Please see Figures 1-3 The present invention provides a control method for an electrostatic air filter, comprising: S100. Establish a communication connection with the high-voltage power supply of at least one electrostatic air filter purification unit via a communication interface. It should be further explained that, in specific implementation, after the control device (such as an industrial PLC, embedded controller or dedicated industrial computer) is powered on and initialized, it will establish a stable master-slave or peer-to-peer communication link by handshaking with the high-voltage power supply of all purification units connected on the same communication bus through its built-in communication port and in accordance with the preset communication protocol.

[0025] S200. Monitor the operating status parameters of each of the purification units; It should be further clarified that the "monitoring" is a continuous or periodic process. The control device sends data read commands to each high-voltage power supply sequentially or concurrently according to a set inspection cycle (e.g., once per second or every 5 seconds). Each high-voltage power supply contains a status monitoring circuit capable of collecting its own key "operating status parameters" in real time, such as "operating status flags" indicating whether it is working properly, "fault codes" indicating whether an anomaly has occurred, and real-time "output voltage values" and "output current values." These parameters are stored in specific registers or memory areas within the high-voltage power supply. When the control device sends a read command, the high-voltage power supply returns the corresponding parameter values ​​through the communication interface.

[0026] S300. When a malfunction is detected in a purification unit based on the working status parameters, the malfunctioning purification unit is located through the communication interface.

[0027] It should be further explained that after receiving these parameters, the control device compares and analyzes them with the preset normal operating threshold range. For example, if the read "fault code" is not zero, or the "output current" is much higher than the current value corresponding to the normal load (which may indicate arcing or short circuit), or the "output voltage" abnormally drops to zero (which may indicate high-voltage open circuit or protection), the control device can determine that the purification unit has "faulted." Since the control device knows exactly which device address (or unit identifier) ​​of the high-voltage power supply it is communicating with during communication establishment and each data exchange, once it analyzes that the parameters returned by a certain address are abnormal, the control device can immediately and uniquely "locate the faulty purification unit," for example, by highlighting the purification unit's number and location on the human-machine interface (HMI) and generating an alarm record containing this precise location information.

[0028] Understandably, this invention fundamentally solves the problem mentioned in the background art of being unable to locate a single fault point when monitoring multiple purification units in series. Maintenance personnel no longer need to open the air conditioning unit door to check each unit individually; they can directly identify which device is malfunctioning on the control box or remote interface, greatly shortening fault diagnosis and repair preparation time and improving system availability.

[0029] Specifically, the communication interface includes a serial communication interface.

[0030] It should be further explained that serial communication is a mature and reliable industrial communication method. Data is transmitted bit-by-bit on a single line, offering advantages over parallel communication such as simple wiring, low cost, long transmission distance, and strong anti-interference capabilities. This makes it ideal for applications where equipment is dispersed within the air conditioning unit and wiring requires conduit installation. In practical implementation, the communication interface hardware for both the control device and each high-voltage power supply uses chips and circuits that support serial communication, such as a UART (Universal Asynchronous Receiver / Transmitter) to RS485 level conversion module. At the software level, it follows standard or custom application layer protocols based on the serial physical layer, such as the Modbus RTU protocol. The control device, acting as the master station, polls each high-voltage power supply acting as a slave station in turn. Using a serial communication interface allows dozens or even hundreds of purification units to be connected with just a single twisted pair of cables, greatly simplifying the wiring complexity within the air conditioning unit and reducing installation costs and failure rates.

[0031] It is understood that this invention provides specific technical means to achieve reliable, economical, and multi-point communication in complex industrial environments, and is the foundation for building large-scale distributed monitoring networks.

[0032] Specifically, the serial communication interface is an RS485 interface.

[0033] It should be further noted that the RS485 standard is preferred for the serial communication interface in this invention. RS485 is a balanced transmission standard interface that uses differential signal transmission, has extremely strong anti-common-mode interference capability, and a communication distance of over a kilometer. A single bus can support dozens to hundreds of nodes, perfectly meeting the needs of air conditioning units with a large number of purification units and long distribution distances. In specific implementation, the communication ports of the control device and each high-voltage power supply are connected to the same pair of RS485 buses (A line and B line), and 120-ohm terminating resistors are connected at both ends of the bus to eliminate signal reflection. The communication rate (baud rate) can be set according to the actual distance and interference conditions, with preferred values ​​including 9600bps, 19200bps, and 38400bps. For example, in environments with low interference, 19200bps can be selected to obtain a faster data refresh rate; in situations with long distances or high interference, 9600bps can be selected to enhance reliability. The data bits are typically 8 bits, the stop bits are 1 bit, and there is no parity check. This is the most common configuration in the industrial field, which ensures compatibility with the vast majority of standard equipment.

[0034] Understandably, the choice of the RS485 interface enables the present invention to possess industrial-grade reliability and scalability, and to operate stably in air-conditioned environments with strong electromagnetic interference (such as that generated by the high-voltage power supply itself), ensuring stable and error-free transmission of monitoring signals.

[0035] Specifically, the operating status parameters include at least one of the switching status of the high-voltage power supply, the output voltage, and the output current.

[0036] It should be further explained that, in specific implementation, the main control MCU (microcontroller) inside each high-voltage power supply acquires the output voltage analog signal and output current analog signal in real time through its ADC (analog-to-digital converter) pin, after voltage division and sampling resistor processing, and converts them into digital values. Simultaneously, the MCU records the high-voltage output enable state as a "switch state" (1 for on, 0 for off) according to its internal logic. These parameters are periodically updated in designated registers within the MCU, with predefined addresses. Specific design includes: Define address 0x0001 as the "Switch Control and Status Register", where one bit represents the control instruction (write) and the other bit represents the actual status (read); Define address 0x0002 as the "output voltage value register" (16-bit unsigned integer, unit: volts); Define address 0x0003 as the "output current value register" (16-bit unsigned integer, unit: milliampere).

[0037] Furthermore, the control device can obtain the corresponding parameters by reading these specific addresses. Monitoring the "switch status" can confirm whether the control commands are executed correctly; monitoring the "output voltage" and "output current" can most directly reflect the working efficiency and load conditions of the high-voltage power supply. For example, during normal purification, the output voltage should be stable near the set value (e.g., 8-10kV), and the output current should be within a certain range (e.g., 0.5-2mA).

[0038] It is understandable that by clarifying these key status parameters, this invention provides the most direct and effective data foundation for subsequent fault diagnosis, power calculation, and operation optimization, enabling monitoring to be upgraded from simple "on / off" judgment to refined "health" assessment.

[0039] Specifically, the method further includes: calculating the operating power of the purification unit based on the output voltage and output current.

[0040] It should be further noted that this invention introduces an added-value function: operating power calculation. In specific implementation, the control device reads the real-time output voltage value of a certain purification unit. (Unit: kilovolts, kV) and output current value (Unit: milliampere, mA) Then, the power is calculated using the high-voltage DC power calculation formula. Calculation of power (unit: watts, W). Since the output of a high-voltage power supply can be considered as DC, the power calculation follows the formula: in, This indicates the instantaneous electrical power of the high-voltage section of the purification unit. This indicates the output voltage of the high-voltage power supply. This represents the output current of the high-voltage power supply. In practical calculations, attention must be paid to unit conversion; typically, [the unit is...]. Convert from kilovolts to volts (multiply by 1000), Convert from milliamperes to amperes (divide by 1000). For simplicity, the formula can also directly use the original values ​​read (units are kV and mA respectively), in which case the calculation result is in "milliwatts × kilovolts", which needs to be divided by 1000 to convert to watts. The control device can periodically (e.g., every minute) calculate and record the operating power of each unit, and can calculate its average power or cumulative energy consumption over a period of time.

[0041] It is understandable that the beneficial effects of the above scheme include: First, precise energy consumption monitoring can be achieved without installing an additional energy meter for each purification unit, reducing system cost and complexity. Second, operating power is a comprehensive health indicator. An abnormal increase in power may indicate severe dust accumulation in the electric field or increased leakage current due to decreased insulation; an abnormal decrease in power may indicate high-voltage arcing or internal component failure in the power supply. By monitoring power change trends, preventative maintenance can be implemented, issuing early warnings before significant efficiency drops or failures occur. This contrasts sharply with the background technology, which stated that "the power consumption of individual purification units cannot be known," providing crucial operation and maintenance management data.

[0042] Specifically, the method further includes: setting a unique device address for the high-voltage power supply of each purification unit, and performing individual addressing through the device address.

[0043] It should be further explained that this invention emphasizes the key mechanism for achieving individualized monitoring—the unique device address. In specific implementation, each high-voltage power supply module has an address setting device on its circuit board, such as a DIP switch, a rotary encoder, or a unique ID that can be configured via software stored in non-volatile memory. During system installation, the installation or commissioning personnel need to assign a unique address (e.g., sequentially numbered starting from 1) to the high-voltage power supply of each purification unit in the air conditioning unit. The address information is part of the communication protocol data frame. When the control device needs to communicate with a specific purification unit, it fills in the address of that unit in the target address field of the sent request data frame. Only purification units with matching addresses will respond to this request and reply with data; other units with mismatched addresses remain silent. Through this address-based "individual addressing" method, the control device can communicate one-to-one with any purification unit on the bus, like a "roll call."

[0044] Understandably, the above solution is fundamental to achieving precise positioning and independent control. It ensures that in a network of dozens of identical hardware devices, each device can be uniquely identified and accessed, thus providing technical feasibility for fault location and subsequent independent control.

[0045] Specifically, the high-voltage power supply can be remotely controlled to turn on and off via the device address.

[0046] It should be further explained that this invention expands the remote control function implemented using device addresses. In specific implementations, the human-machine interface (such as a touch screen) of the control device can have an independent "start / stop" button for each purification unit (named by its device address or physical location). When the operator clicks the "start" button of a unit, the control device generates a data frame containing the unit's device address and a "turn on high voltage" command code, which is sent via the communication bus. After receiving the command, the high-voltage power supply at the corresponding address will have its MCU drive its internal power switching circuit to power on the high-voltage output module. Similarly, sending a "turn off high voltage" command will stop it. The sending of control commands is independent, allowing individual control of any unit without affecting other units. Furthermore, complex logic such as group control, timed control, or interlocking control with air conditioning fans can be programmed.

[0047] Understandably, the above solution offers significant operational flexibility. During maintenance, a suspected faulty unit can be shut down for repair while other units continue purifying. At night or during low-load periods, some units can be strategically shut down to save energy. This enables refined and intelligent operation management of large-scale filtration systems.

[0048] Specifically, when a malfunction of the purification unit is detected, the high-voltage power supply is controlled to reduce the output voltage to maintain purification operation.

[0049] It should be further explained that this invention describes an innovative fault-tolerant operation strategy. In specific implementation, the control device has pre-set fault judgment and voltage reduction operation logic. When the control device determines, based on operating status parameters (such as overcurrent fault flags, current surges, and frequent arcing detection signals), that a purification unit has experienced a "derating fault" (such as mild arcing or dust accumulation leading to a decrease in insulation resistance) rather than a "serious hard fault" (such as a complete short circuit or open circuit), it does not immediately and completely shut down its high voltage. Instead, it sends a "set output voltage" command to the high-voltage power supply of the unit through the communication interface, reducing its operating voltage from the rated value (e.g., 10kV) to a safe maintenance level. The voltage reduction algorithm can be a step-wise or proportional adjustment. For example, a preferred voltage reduction strategy is: when a short-term overcurrent or the number of arcing events exceeds a threshold within one minute, (For example If a minor fault is detected, the control device sends a command to reduce the output voltage setpoint. (For example After the voltage is reduced, the electric field strength weakens, arcing is usually suppressed, and the current drops. The control device then continues monitoring. If the fault (such as overcurrent or arcing) disappears, the unit continues to operate at a lower voltage (e.g., 8kV) to maintain a certain purification efficiency. If the fault recurs, the voltage can be reduced again (e.g., to 6kV) or the unit can be shut down ultimately. Threshold and These are optimized values ​​obtained through extensive experimentation, achieving a good balance between suppressing common arcing and maintaining sufficient purification efficiency. Excessive arcing can damage the electrodes and generate ozone, requiring timely intervention; the 2kV step voltage reduction effectively increases the arcing voltage while avoiding a sudden drop in efficiency.

[0050] Understandably, the above solution represents a revolutionary approach. It changes the traditional binary state of purification units—"abnormal operation equals failure and shutdown"—and introduces a "sub-healthy" operating mode. Upon detecting early signs of failure, it proactively reduces operating parameters to prevent the fault from escalating, allowing the equipment to "continue operating despite its malfunction." Although the purification efficiency of a single unit decreases at this point, it prevents complete unit failure, thus maximizing the overall purification capacity of the air conditioning unit before maintenance personnel arrive. Compared to the background technology where there is "no purification efficiency at all," this significantly improves the system's reliability and continuity.

[0051] Specifically, the working status parameters are transmitted to a remote monitoring platform for real-time alerts and data analysis.

[0052] It should be further noted that this invention describes the remote application of data. In specific implementations, the control device (or the gateway device connected to it) typically has uplink communication capabilities such as Ethernet and 4G / 5G. The control device periodically (e.g., every 5 minutes) packages all collected operating status parameters of the purification units (including device address, switch status, voltage, current, calculated power, fault codes, etc.) and uploads them to the cloud or an internal enterprise remote monitoring platform via standard protocols (such as MQTT, HTTP). After receiving the data, the platform stores it in a database and displays it in real time on the monitoring interface in the form of charts, lists, etc. The platform can be configured with alarm rules. For example, when a fault code, continuous abnormal power, or a unit goes offline is detected, an alarm message is immediately sent to designated maintenance personnel via SMS, mobile APP push, email, etc. The alarm message contains precise fault unit location.

[0053] It should be further noted that the present invention defines the following fault codes: (1) Communication fault category (code range: 0x1X series), used to diagnose connection problems between the control system and the purification unit, specifically including: ①0x10: Communication timeout fault - The control device has not received a response from a certain purification unit multiple times (e.g., 3 times).

[0054] ②0x11: Communication checksum error - The received data frame checksum (CRC) is incorrect, indicating that the data transmission may be interfered with.

[0055] ③0x12: Device address conflict - Two or more devices with the same address were detected on the bus.

[0056] (2) Performance Anomaly Class (Code Range: 0x2X Series): Based on in-depth analysis of parameters such as voltage and current, this class is used to warn of performance degradation or potential risks, specifically including: ①0x20: Overcurrent warning - If the output current exceeds 150% of the rated value (e.g., >1.5mA) for a preset time (e.g., 10 seconds), it may indicate severe dust accumulation in the electric field or an impending arcing.

[0057] ②0x21: Undervoltage warning - The output voltage cannot reach the set value (e.g., below 80% of the set value), which may indicate that the power module is aging or the input voltage is abnormally low.

[0058] ③0x22: Output power anomaly - The calculated real-time power deviates significantly from the reference power band based on the cleaned state (e.g., ±30%).

[0059] (3) Hardware Fault Class (code range: 0x3X series), used to indicate hardware problems that require immediate intervention, specifically including: ①0x30: High-voltage short circuit lock-up - The output current increases sharply to the hardware protection threshold, and the high-voltage power supply enters the lock-up protection state, requiring power-off reset.

[0060] ②0x31: Frequent Arcing Protection - If the number of arcing incidents detected per unit time (e.g., 1 minute) exceeds the safety threshold (e.g., 10 times), the device will automatically perform protective actions.

[0061] Furthermore, this invention also designs a tiered alarm mechanism, the specific design of which is as follows: (1) Level 1 Alarm (Indicative, such as 0x20, 0x21): A yellow warning icon is displayed on the HMI interface in the control room, and a log is recorded. This indicates that maintenance personnel need to pay attention to this unit during the next scheduled maintenance. (2) Level 2 alarm (urgent, such as 0x22): Triggers the audible and visual alarm and generates an alarm work order on the remote monitoring platform to notify the maintenance personnel to handle it as soon as possible; (3) Level 3 alarm (severity, such as 0x30): Immediately and automatically cut off the high voltage output of the faulty unit and send the highest priority alarm information (such as SMS, APP push) to the relevant person in charge.

[0062] Furthermore, for certain performance-related faults (such as the 0x20 overcurrent warning), the system can automatically execute preset optimization strategies instead of simply shutting down. For example, when a 0x20 code is diagnosed (due to increased current caused by dust accumulation), the control device can automatically send a command to the purification unit to reduce its operating voltage by 10%-20%.

[0063] Understandably, reducing the voltage weakens the electric field strength, thereby suppressing arcing and allowing the current to fall back to a safe range. This enables the unit to maintain some purification efficiency even in a "sub-healthy" state, buying time for planned maintenance and realizing an intelligent evolution from "shutting down upon failure" to "downgrading operation after early warning."

[0064] Understandably, this invention enables remote, mobile, and intelligent operation and maintenance. Management personnel can monitor the health status of the entire air conditioning unit purification system anytime, anywhere via their mobile phones, without needing to be physically present on-site. Timely fault alerts ensure rapid response. Long-term data accumulation provides data support for optimizing system operation, developing preventative maintenance plans, and reducing operating costs, greatly improving the convenience and foresight of management.

[0065] Please see Figure 2 The present invention provides another embodiment, which provides a control system for an electrostatic air filter, the control system of which includes: At least one purification unit 100, each purification unit 100 including a built-in high-voltage power supply and a communication interface; It should be further explained that, in specific implementation, the "multiple purification units 100" are physically installed in the internal air duct of the air conditioning unit and arranged in an array. The "built-in high-voltage power supply" of each purification unit 100 is tightly integrated with the ion box (dust collection plate), and its "communication interface" terminals (such as RS485 A, B, GND) are led out through cables and connected in parallel to the same pair of communication buses in a daisy-chain manner.

[0066] It should be further explained that each purification unit 100's electrostatic air filter adopts a highly integrated modular structure to support refined monitoring and fault location of the control method. This includes an ionization module, a dust collection module, and a high-voltage power supply. The ionization module is located on the windward side of the electrostatic air filter frame and includes a discharge rod, a discharge head, and a discharge conductor. The discharge head uses a carbon fiber brush or metal wire structure, and its arrangement forms an angle of 0 to 90 degrees with the frame plane to optimize particulate charging efficiency and reduce airflow resistance. The dust collection module is located on the air outlet side of the frame and adopts a honeycomb, plate, or microporous structure. The honeycomb type consists of a grounded cylindrical array, the plate type uses stacked conductive plates wrapped in insulating material, and the microporous type uses a dielectric carrier to form a microporous array. All of these can efficiently adsorb charged pollutants. The high-voltage power supply is built into the power compartment inside the frame or on the side, and is connected to the ionization module and dust collection module via high-voltage cables. The power compartment is equipped with waterproof lead interfaces and communication interfaces (such as RS485). The interface terminals are connected in parallel to the control device via twisted-pair cables, thus ensuring tight integration between the high-voltage power supply and the purification unit. This allows the control device to address each unit individually using a unique device address and monitor output voltage, current, and other status parameters in real time, thereby deeply binding fault handling to the filter. This ensures that the system can not only accurately locate faulty units but also maintain purification function through adaptive adjustment, significantly improving reliability.

[0067] For further information, please refer to [link / reference]. Figure 3 , attached Figure 3 A schematic diagram of the electrostatic air filter installation location is provided. The system, from left to right along the airflow direction, includes a mixing section, a pre-filter section, a purification section, a maintenance section, a cooling section, a humidification section, and a blower section. The purification section is the core of this solution, clearly indicating the installation location of the rectangular electrostatic air filter. The airflow is as follows: outdoor fresh air and indoor return air converge in the mixing section, then flow sequentially through the pre-filter section for pre-filtration of large particles, followed by the purification section where the electrostatic air filter performs efficient electrostatic adsorption purification. The purified air continues to flow through the maintenance section (for easy maintenance), the cooling section (for cooling and dehumidification), and the humidification section (for humidity adjustment), finally being delivered to the target space by the blower section. Figure 3 The arrows clearly indicate the flow direction of the top return air and the left-side fresh air, and the supporting structure is drawn at the bottom of the system. Figure 3 The specific application scenarios, installation sequence, and airflow path of electrostatic air filters in centralized air handling units are clearly defined, providing an intuitive basis for understanding their integration methods in actual engineering.

[0068] For further information, please refer to [link / reference]. Figure 4 , Figure 4A preferred embodiment of the physical layout and communication connection architecture between the control device 200 and the purification unit 100 in the electrostatic air filter control system is clearly shown. For example... Figure 4 As shown, the control device 200 is located on the left side of the diagram, represented by an independent rectangular frame, representing the core control unit of the system. To its right is a typical deployment array of the purification units 100, comprising twelve purification units, represented by neatly arranged rectangular icons. Each icon contains a uniform grid pattern of small squares to symbolize its internal dust collection or ionization structure. These twelve purification units are arranged in three rows of four, forming a standard installation matrix. Figure 4 The most crucial technical information lies in the connection method: multiple independent straight lines extend from the right side of the control device 200, each line clearly and point-to-point connecting to the top of a corresponding purification unit 100. This connection diagram explicitly rejects a simple bus serial connection method, instead intuitively demonstrating that the control device 200 and each purification unit 100 have independent and parallel communication channels. This connection architecture is the foundation for the implementation of this control method. It means that the control device 200 can simultaneously or time-sharingly exchange bidirectional data with any designated purification unit 100 in the array, thereby enabling independent monitoring of each unit's operating parameters (such as voltage and current), individual addressing of device addresses, and precise issuance of operating commands (such as start / stop and power adjustment). This provides a clear physical and logical path diagram for centralized system monitoring, parallel management, and fault location and maintenance of individual modules.

[0069] The control device 200 is connected to each of the high-voltage power supplies via the communication interface and is configured to execute the control method described in any of the above-mentioned embodiments. It should be further noted that the "control device 200" is typically installed in an electrical control box on the outside of the air conditioning unit for easy operation and maintenance. Its core can be a PLC or dedicated controller integrating a communication port and logic processing capabilities. The communication port of the control device 200 is connected to the air conditioning unit via a main communication cable, converging with the internal purification unit bus. The control device 200 is also connected to a human-machine interface (HMI touchscreen) and may be equipped with an uplink communication module. The control program running in the control device 200 is configured to completely execute any or all of the control method steps described above, including communication establishment, status monitoring, fault location, power calculation, independent control, step-down operation logic, and remote data transmission.

[0070] Understandably, this system embeds innovative control methods into specific hardware and software entities, forming a complete and implementable solution. It integrates state sensing, intelligent analysis, precise control, and remote connectivity, transforming a traditional, passive electrostatic filtration system into an active, intelligent, and remotely controllable IoT-based device system, significantly enhancing the product's added value and market competitiveness.

[0071] In a preferred embodiment, this application also provides an electronic device, the electronic device comprising: The computer device includes a memory and a processor, wherein the memory stores computer-readable instructions that, when executed by the processor, implement the control method for the electrostatic air filter. The computer device can be broadly categorized as a server, terminal, or any other electronic device with the necessary computing and / or processing capabilities. In one embodiment, the computer device may include a processor, memory, network interface, communication interface, etc., connected via a system bus. The processor of the computer device can be used to provide the necessary computing, processing, and / or control capabilities. The memory of the computer device may include a non-volatile storage medium and internal memory. The non-volatile storage medium may store an operating system, computer programs, etc. The internal memory can provide an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface and communication interface of the computer device can be used to connect and communicate with external devices via a network. When the computer program is executed by the processor, it performs the steps of the method of the present invention.

[0072] This invention can be implemented as a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, causes the steps of the methods of embodiments of the invention to be performed. In one embodiment, the computer program is distributed across multiple network-coupled computer devices or processors, such that the computer program is stored, accessed, and executed in a distributed manner by one or more computer devices or processors. A single method step / operation, or two or more method steps / operations, may be executed by a single computer device or processor or by two or more computer devices or processors. One or more method steps / operations may be executed by one or more computer devices or processors, and one or more other method steps / operations may be executed by one or more other computer devices or processors. One or more computer devices or processors may execute a single method step / operation, or execute two or more method steps / operations.

[0073] Those skilled in the art will understand that the method steps of this invention can be performed by a computer program instructing related hardware, such as a computer device or processor, to perform the steps of this invention when executed. Depending on the context, any references herein to memory, storage, databases, or other media may include non-volatile and / or volatile memory. Examples of non-volatile memory include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), flash memory, magnetic tape, floppy disk, magneto-optical data storage device, optical data storage device, hard disk, solid-state drive, etc. Examples of volatile memory include random access memory (RAM), external cache memory, etc.

[0074] The technical features described above can be combined arbitrarily. Although not all possible combinations of these technical features are described, any combination of these technical features should be considered to be covered by this specification, provided that such combination does not contain contradictions.

[0075] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A control method for an electrostatic air filter, characterized in that, include: S100. Establish a communication connection with the high-voltage power supply of at least one electrostatic air filter purification unit via a communication interface. S200. Monitor the operating status parameters of each of the purification units; S300. When a malfunction is detected in a purification unit based on the working status parameters, the malfunctioning purification unit is located through the communication interface.

2. The control method for the electrostatic air filter according to claim 1, characterized in that, The communication interface includes a serial communication interface.

3. The control method according to claim 2, characterized in that, The serial communication interface is an RS485 interface.

4. The control method for the electrostatic air filter according to claim 1, characterized in that, The operating status parameters include at least one of the switching status of the high-voltage power supply, the output voltage, and the output current.

5. The control method for an electrostatic air filter according to claim 4, characterized in that, The method further includes: calculating the operating power of the purification unit based on the output voltage and output current.

6. The control method for an electrostatic air filter according to claim 1, characterized in that, The method further includes: assigning a unique device address to the high-voltage power supply of each purification unit, and performing individual addressing through the device address.

7. The control method for an electrostatic air filter according to claim 6, characterized in that, The high-voltage power supply can be remotely controlled to turn on and off via the device address.

8. The control method for an electrostatic air filter according to claim 1, characterized in that, When a malfunction is detected in the purification unit, the high-voltage power supply is controlled to reduce the output voltage to maintain purification operation.

9. The control method for an electrostatic air filter according to claim 1, characterized in that, The operating status parameters are transmitted to a remote monitoring platform for real-time alerts and data analysis.

10. A control system for an electrostatic air filter, characterized in that, include: At least one purification unit, each purification unit including a built-in high-voltage power supply and a communication interface; A control device, connected to each of the high-voltage power supplies via the communication interface, is configured to execute the control method according to any one of claims 1 to 9.

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