Ultraviolet lamp ballast power supply control circuit with multiple protection and switch structure

Abstract

The invention belongs to the technical field of ultraviolet sterilization equipment, and particularly relates to an ultraviolet lamp ballast power supply control circuit with multiple protection and a switch structure, which comprise a power supply input module, a switch control module, an overcurrent protection module, an ultraviolet lamp ballast module, an ultraviolet lamp load module, a surge suppression module and a control driving module, safe power supply, abnormal protection and service life prolonging of the ultraviolet lamp ballast are realized, remote control capability and restorable protection are considered, maintenance cost is reduced, and electromagnetic interference is reduced; the problems that in the prior art, ultraviolet lamp ballast power supply control lacks perfect protection, maintenance cost is high, and electromagnetic interference is large are solved, and the ultraviolet lamp ballast power supply control circuit has the advantages of being simple in structure, high in safety, convenient and fast to maintain and wide in adaptability and is suitable for various ultraviolet disinfection, air purification and ultraviolet lighting devices.

Description

Technical Field

[0001] This invention relates to the field of ultraviolet disinfection equipment technology, specifically to a power supply control circuit and switch structure for an ultraviolet lamp ballast with multiple protections. Background Technology

[0002] Most existing ultraviolet lamps use external electronic ballasts for power supply. These ballasts are typically powered by low-voltage DC power, which can easily generate large inrush currents during startup or under abnormal operating conditions. Furthermore, during long-term operation, ultraviolet lamps may experience issues such as lamp tube aging, internal short circuits in the ballast, or external wiring malfunctions, leading to problems like overcurrent in the power supply line, contact sticking, or controller damage.

[0003] In existing technologies, the above-mentioned problems are usually addressed by using only relays or simple fuses for control and protection. Such solutions have obvious drawbacks: they lack remote control capabilities and cannot meet the control requirements of intelligent devices; overcurrent protection uses one-time fuses, which need to be replaced after a failure to restore use, resulting in high maintenance costs; they are difficult to effectively suppress surge currents and electromagnetic interference during startup and switching operations, which leads to easy burning of relay contacts, shortened service life, and electromagnetic interference affecting the normal operation of other electronic modules in the system, resulting in insufficient overall reliability and safety. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a power supply control circuit and switch structure for a UV lamp ballast with multiple protections, so as to achieve safe power supply, abnormal protection and life extension of the UV lamp ballast, while taking into account remote control capability and recoverable protection, reducing maintenance costs and reducing electromagnetic interference.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a power supply control circuit and switching structure for a UV lamp ballast with multiple protections, comprising:

[0006] Power input module: used to connect to an external DC power supply to provide DC power to the entire circuit system;

[0007] Switch control module: A relay is used, with its main contacts connected in series between the power input module and the input terminal of the UV lamp ballast module to control the on / off state of the UV lamp ballast power supply circuit; the relay coil is driven by the control drive module to realize remote or automatic control of the UV lamp.

[0008] Overcurrent protection module: A PTC self-resetting fuse is used, which is connected in series between the main contacts of the switch control module and the input terminal of the UV lamp ballast module to provide overcurrent protection for the UV lamp ballast module and its downstream UV lamp load module.

[0009] Surge suppression module: It adopts an RC suppression circuit, which is connected in parallel across the main contacts of the switch control module to suppress voltage surges and electromagnetic interference generated during the switching of the relay;

[0010] UV lamp ballast module: Its input terminal is connected to the overcurrent protection module to provide driving energy to the UV lamp load module and drive the UV lamp to work;

[0011] UV lamp load module: Connected to the UV lamp ballast module, it is used to emit UV light under the driving action to achieve disinfection, purification or lighting functions;

[0012] Control drive module: Used to output control signals to drive the relay action of the switch control module, thereby controlling the on / off state of the power supply circuit.

[0013] Preferably, the power input module adopts a DC power interface, which can be connected to a 12V-48V DC power supply to provide stable DC power for the entire circuit system and adapt to the power supply requirements of UV lamp equipment with different power.

[0014] Preferably, the switch control module uses an electromagnetic relay, with one end of its main contact connected to the output terminal of the power input module and the other end connected to the overcurrent protection module; one end of the relay coil is connected to the output terminal of the control drive module through a current-limiting resistor, and the other end is grounded; the high and low level signals output by the control drive module control the on / off state of the relay coil, thereby controlling the closing and opening of the main contacts, and realizing the on / off control of the ultraviolet lamp power supply circuit.

[0015] Preferably, the overcurrent protection module uses a PTC resettable fuse, the model of which is selected according to the rated current of the UV lamp ballast. For example, a ballast with a rated current of 2A uses a 2A / 60V PTC resettable fuse. One end of the PTC resettable fuse is connected to the main contact of the switch control module, and the other end is connected to the input terminal of the UV lamp ballast module. When the circuit current exceeds the operating current of the PTC resettable fuse, its resistance rapidly increases to the kiloohm level, limiting the circuit current within a safe range. After the fault is cleared, the temperature of the PTC resettable fuse drops, the resistance returns to its initial state, and the circuit conducts normally.

[0016] Preferably, the UV lamp ballast module adopts a conventional electronic high-frequency ballast. Its input terminal is connected to the output terminal of the overcurrent protection module, and its output terminal is connected to the UV lamp load module. It is used to convert DC power into high-frequency AC power required for the UV lamp to work and drive the UV lamp to emit light.

[0017] Preferably, the ultraviolet lamp load module uses a UVC ultraviolet lamp or a UVLED module, which is matched and connected to the output end of the ultraviolet lamp ballast module. Under the drive of the ballast, it emits ultraviolet light to achieve functions such as disinfection and air purification.

[0018] Preferably, the surge suppression module adopts an RC series circuit, in which the resistor is a carbon film resistor of 100Ω-1kΩ and the capacitor is a ceramic capacitor of 0.1μF-1μF; the two ends of the RC series circuit are respectively connected to the two ends of the main contacts of the switch control module; at the moment when the main contacts of the relay are energized or de-energized, the capacitor charges and discharges rapidly to absorb transient surge energy, the resistor suppresses the charging and discharging current, avoids the generation of electric arcs at the contacts, and attenuates electromagnetic interference signals.

[0019] Preferably, the control drive module adopts an MCU microcontroller, such as an STM32 series microcontroller, or a dedicated driver chip, such as ULN2003. Its input terminal can be connected to remote control signals or automatic control signals, and its output terminal is connected to the relay coil of the switch control module through a current-limiting resistor. The control drive module outputs corresponding drive signals according to the input signals to control the relay to act, thereby realizing remote or automatic control of the ultraviolet lamp.

[0020] Preferably, it also includes a remote interaction module for realizing data interaction and command transmission between the device and the remote terminal, including a communication module and a memory, both of which are bidirectionally electrically connected to the control drive module and powered by the power input module;

[0021] Communication module: Select WiFi module, Bluetooth module or NB-IoT module; its input end is connected to the UART interface of the control drive module, and its output end communicates with the remote terminal through wireless signal;

[0022] Memory: Connects to the SPI / I2C interface of the control driver module to store device operation data. The storage capacity supports the retention of at least one year of historical data.

[0023] Preferably, the device is used to monitor the working environment and its own status in real time, and to provide decision-making basis for the control and drive module. It includes temperature and humidity sensors, smoke and fire sensors, and brightness sensors. The signal output terminals of all sensors are connected to the ADC interface of the control and drive module and are powered by the power input module.

[0024] Temperature and humidity sensor: A digital sensor is selected and installed near the UV lamp to collect ambient temperature and humidity data in real time and transmit it to the control and drive module. When the temperature exceeds the preset value, the control and drive module triggers power reduction or shutdown protection to avoid short circuits caused by excessive humidity and accelerated lamp light decay caused by excessive temperature.

[0025] Smoke sensor: An ionization or photoelectric smoke sensor is selected and installed in a safe area around the equipment. When the smoke concentration exceeds the threshold, an alarm signal is immediately sent to the control drive module. The control drive module quickly cuts off the power supply circuit of the switch control module and pushes the smoke alarm information to the remote terminal through the remote interaction module.

[0026] Brightness sensor: A dedicated photoelectric sensor for ultraviolet light is selected to detect ultraviolet light intensity data in real time and feed it back to the control and drive module; when the light intensity is lower than the preset value, the control and drive module controls the ballast to increase the output power for compensation, or prompts the lamp tube to age through the remote interaction module; when the light intensity is abnormally high, the power reduction protection is triggered to avoid ballast overload.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] Strong and weak current isolation, excellent safety performance: The control drive module and the power supply circuit of the UV lamp ballast are electrically isolated by relays, which avoids interference from the strong current circuit to the control circuit, and at the same time prevents the risk of electric shock, significantly improving the system safety.

[0029] Resettable overcurrent protection with low maintenance costs: Using a PTC resettable fuse as the overcurrent protection element, when a short circuit or abnormal overload occurs in the ballast, UV lamp, or circuit, the PTC resettable fuse rapidly heats up and increases its resistance, automatically limiting the circuit current and protecting the relevant devices from damage; after the fault is cleared, the PTC resettable fuse automatically cools down and resets, restoring the system to normal operation without the need to replace the device, significantly reducing maintenance costs and downtime;

[0030] Dual suppression of surges and interference extends device lifespan: The RC suppression circuit is connected in parallel across the main contacts of the relay. When the relay is energized or de-energized, it can quickly absorb transient surge energy, effectively suppress voltage spikes, reduce contact erosion, and extend the lifespan of the relay. At the same time, the RC suppression circuit can attenuate electromagnetic interference signals, reduce electromagnetic interference to other electronic modules and peripheral equipment in the system, and ensure the stable operation of the entire system.

[0031] Simple and reliable structure with wide adaptability: Each functional module has a clear division of labor and works in concert. The overall circuit structure is simple, the components are conventionally selected, and it is easy to process, manufacture and mass-produce. It can be widely used in ultraviolet disinfection equipment, air purification equipment and related ultraviolet lighting systems. It is compatible with ultraviolet lamps and ballasts of different power specifications and is highly practical.

[0032] Supports remote / automatic control and has a high degree of intelligence: The relay coil is driven by the control drive module and can be connected to remote control signals or automatic control signals (such as sensor trigger signals, timing control signals, etc.) to realize the remote start and stop or automatic start and stop of the ultraviolet lamp, meeting the application needs of intelligent equipment.

[0033] More convenient operation and adaptable to multiple scenarios: Supports remote start / stop and power adjustment via mobile APP and cloud platform, eliminating the need for on-site operation. It is suitable for unattended industrial operation and remote control in civilian applications, solving the problem of traditional on-site operation. The memory retains more than one year of operating data, which can be queried and traced through a remote terminal after a fault, avoiding the trouble of no records and difficulty in locating problems, and reducing maintenance difficulty.

[0034] Real-time status monitoring to avoid blind operation: The working status and parameter data of the equipment are uploaded to the remote terminal in real time. Users can check at any time whether the ultraviolet lamp is working properly and whether the light intensity meets the standard, avoiding the situation where equipment failure is not detected and disinfection is ineffective. Attached Figure Description

[0035] Figure 1 This is a logic block diagram of the present invention. Detailed Implementation

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

[0037] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Example:

[0039] Please see Figure 1 The present invention provides the following technical solution:

[0040] A power supply control circuit and switch structure for a UV lamp ballast with multiple protections includes a power input module 10, a switch control module 20, an overcurrent protection module 30, a UV lamp ballast module 40, a UV lamp load module 50, a surge suppression module 60, and a control drive module 70.

[0041] Power input module 10: It adopts a DC power interface and connects to a 12V-48V DC power supply to provide stable DC power for the entire circuit system and adapt to the power supply requirements of UV lamp equipment with different power.

[0042] Switch control module 20: An electromagnetic relay is selected. One end of its main contact is connected to the output terminal of the power input module 10, and the other end is connected to the overcurrent protection module 30. One end of the relay coil is connected to the output terminal of the control drive module 70 through a current limiting resistor, and the other end is grounded. The high and low level signals output by the control drive module 70 control the on and off of the relay coil, thereby controlling the opening and closing of the main contacts to realize the on and off control of the ultraviolet lamp power supply circuit.

[0043] Overcurrent protection module 30: A PTC resettable fuse is selected, the model of which is selected according to the rated current of the UV lamp ballast. For example, a ballast with a rated current of 2A uses a 2A / 60V PTC resettable fuse. One end of the PTC resettable fuse is connected to the main contact of the switch control module 20, and the other end is connected to the input terminal of the UV lamp ballast module 40. When the circuit current exceeds the operating current of the PTC resettable fuse, its resistance rapidly increases to the kiloohm level, limiting the circuit current within a safe range. After the fault is cleared, the temperature of the PTC resettable fuse drops, the resistance returns to its initial state, and the circuit conducts normally.

[0044] UV lamp ballast module 40: It adopts a conventional electronic high-frequency ballast. Its input end is connected to the output end of the overcurrent protection module 30, and its output end is connected to the UV lamp load module 50. It is used to convert DC power into high-frequency AC power required for UV lamp operation to drive the UV lamp to emit light.

[0045] UV lamp load module 50: Selects a UVC UV lamp or UVLED module, which is matched and connected to the output end of the UV lamp ballast module 40. Under the drive of the ballast, it emits UV light to achieve functions such as disinfection and air purification.

[0046] Surge suppression module 60: adopts an RC series circuit, in which the resistor is a carbon film resistor of 100Ω-1kΩ and the capacitor is a ceramic capacitor of 0.1μF-1μF; the two ends of the RC series circuit are respectively connected to the two ends of the main contacts of the switch control module 20; at the moment when the main contacts of the relay are energized or de-energized, the capacitor charges and discharges rapidly to absorb transient surge energy, the resistor suppresses the charging and discharging current, avoids the generation of electric arcs at the contacts, and attenuates electromagnetic interference signals.

[0047] Control drive module 70: It adopts an MCU microcontroller, such as an STM32 series microcontroller, or a dedicated driver chip, such as ULN2003. Its input terminal can be connected to remote control signals or automatic control signals, and its output terminal is connected to the relay coil of the switch control module 20 through a current-limiting resistor. The control drive module 70 outputs corresponding drive signals according to the input signals to control the relay to act, thereby realizing remote or automatic control of the ultraviolet lamp.

[0048] It also includes a remote interaction module 80: used to realize data interaction and command transmission between the device and the remote terminal, including a communication module and a memory, both of which are bidirectionally electrically connected to the control drive module 70 and powered by the power input module 10.

[0049] Communication module: Select a WiFi module such as ESP826, a Bluetooth module such as HC-05, or an NB-IoT module such as BC95, depending on the application scenario; its input end is connected to the UART interface of the control drive module 70, and its output end communicates with the remote terminal via wireless signal.

[0050] The functions include: receiving start / stop / power adjustment commands sent by a remote terminal and transmitting them to the control drive module 70; uploading the device status data collected by the control drive module 70 to the remote terminal, including working status, current and voltage parameters, sensor detection data, fault information, etc.; and supporting remote firmware upgrades, updating the operating program of the control drive module 70 through the remote terminal.

[0051] Memory: Selects a Flash chip such as W25Q64 or an EEPROM chip such as AT24C256, and connects to the SPI / I2C interface of the control driver module 70; functions include: storing device operating data, including cumulative working time, fault records and occurrence time, and sensor historical data, with storage capacity supporting at least 1 year of historical data retention; storing configuration parameters issued by remote terminals, such as startup delay, power threshold, and protection trigger conditions; data is not lost after power failure, and historical records can be traced after fault recovery.

[0052] It also includes a monitoring module 90: used to monitor the working environment and its own status of the equipment in real time, and to provide decision-making basis for the control drive module 70. It includes temperature and humidity sensors, smoke and fire sensors, and brightness sensors. The signal output terminals of all sensors are connected to the ADC interface of the control drive module 70 and are powered by the power input module 10.

[0053] Temperature and humidity sensor: A digital sensor such as DHT11 or SHT30 is selected, with a measurement range of -20℃~60℃ and 0%RH~100%RH, and a measurement accuracy of ±0.5℃ and ±2%RH. It is installed near the UV lamp to collect ambient temperature and humidity data in real time and transmit it to the control drive module 70. When the temperature exceeds 50℃ or the humidity exceeds 90%RH, the control drive module 70 triggers power reduction or shutdown protection to avoid short circuits caused by excessive humidity and accelerated lamp light decay caused by excessive temperature.

[0054] Smoke sensor: An ionization or photoelectric smoke sensor, such as MQ-2, is selected with a response time ≤5s and a detection concentration range of 0.1~10mg / m³. It is installed in a safe area around the equipment. When the smoke concentration exceeds the threshold, it immediately sends an alarm signal to the control drive module 70. The control drive module 70 quickly cuts off the power supply circuit of the switch control module 20. At the same time, it pushes the smoke alarm information to the remote terminal through the remote interaction module 80 to prevent the fire hazard from spreading.

[0055] Brightness sensor: A dedicated ultraviolet light photoelectric sensor, such as GUVA-T21GH, is selected, with a response wavelength of 200~400nm and a measurement range of 0~10mW / cm². It is installed on one side of the ultraviolet lamp's emitting surface to detect ultraviolet light intensity data in real time and feed it back to the control drive module 70. When the light intensity is lower than 80% of the rated value, the control drive module 70 controls the ballast to increase the output power for compensation, or prompts the lamp tube to age through the remote interaction module 80. When the light intensity is abnormally high, the power reduction protection is triggered to avoid ballast overload.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the invention is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] The working process of this solution is as follows:

[0058] Standby state: The power input module 10 is connected to a DC power supply, the control drive module 70 does not output a drive signal, the relay coil is de-energized, the main contacts are open, the UV lamp ballast module 40 and the UV lamp load module 50 are not powered, and the system is in standby state.

[0059] Start-up: Upon receiving the start control signal, remote control signal, or automatic control signal, the control drive module 70 outputs a high-level drive signal, energizing the relay coil and closing the main contacts. The DC power output from the power input module 10 is transmitted to the UV lamp ballast module 40 via the relay main contacts and the PTC resettable fuse. The ballast starts and drives the UV lamp load module 50 to emit UV light. At this time, the RC suppression circuit absorbs the surge energy at the moment the main contacts close, preventing contact erosion.

[0060] Abnormal protection: If a short circuit or overload occurs in the UV lamp ballast module 40, UV lamp load module 50, or the circuit, and the circuit current exceeds the operating current of the PTC resettable fuse, the PTC resettable fuse will quickly limit the current to protect the ballast, relay, and other devices from damage.

[0061] Stop state: After receiving the stop control signal, the control drive module 70 outputs a low-level signal, the relay coil is de-energized, the main contacts open, and the UV lamp load module 50 stops working; the RC suppression circuit absorbs the transient energy at the moment the main contacts open, suppressing voltage surges and electromagnetic interference;

[0062] Fault recovery: After the short circuit or overload fault is cleared, the PTC self-resetting fuse will automatically cool and reset, and the system can start and work normally without replacing any components.

[0063] The workflow for integration with the remote interaction module and monitoring module is as follows:

[0064] Standby state: The power input module 10 is connected to a DC power supply, the control drive module 70 does not receive a start signal, the relay coil is de-energized, and the main contacts are open; the monitoring module 90 is in a low-power detection state, collecting temperature and humidity data in real time and storing it in the memory; the remote interaction module 80 maintains a communication connection and waits for instructions from the remote terminal; the UV lamp ballast module 40 and the UV lamp load module 50 are not powered, and the system is in standby state.

[0065] Start-up: After receiving a remote terminal command or local automatic control signal, the control drive module 70 outputs a high-level drive signal, energizing the relay coil and closing the main contacts. The DC power output from the power input module 10 is transmitted to the UV lamp ballast module 40 via the relay main contacts and the PTC self-resetting fuse. The ballast starts and drives the UV lamp load module 50 to emit light. The RC suppression circuit absorbs the surge energy at the moment the main contacts close. The monitoring module 90 synchronously starts full-parameter monitoring, collecting temperature, humidity, and light intensity data every 5 seconds and smoke status data every 10 seconds. After being processed by the control drive module 70, the data is stored in the memory at regular intervals and simultaneously uploaded to the remote terminal via the communication module.

[0066] Abnormal protection: Overcurrent protection: When the loop current exceeds the threshold, the PTC self-resetting fuse limits the current, and the control drive module 70 records the fault information and uploads it to the remote terminal;

[0067] Environmental anomaly protection: When the temperature, humidity, light intensity exceed the threshold or smoke is detected, the control drive module 70 triggers corresponding protection actions, such as power reduction / shutdown, and pushes alarm information at the same time;

[0068] Surge protection: The RC suppression circuit absorbs transient energy, ensuring stable communication module signals and preventing surge interference with remote data transmission.

[0069] Shutdown state: After receiving a shutdown command from a remote terminal or a local shutdown signal, the control drive module 70 outputs a low-level signal, the relay coil is de-energized, and the main contacts open; the RC suppression circuit absorbs the transient energy at the moment of disconnection; the monitoring module 90 continues to collect environmental data, records the shutdown time and status, and then resumes the low-power mode; the remote interaction module 80 feeds back the shutdown status to the remote terminal.

[0070] Fault recovery and data traceability: After faults such as short circuit, overload, and environmental abnormalities are eliminated, the PTC self-resetting fuse automatically resets, the monitoring module 90 detects that the parameters have returned to normal, and the control drive module 70 allows the system to restart; the fault records and historical monitoring data stored in the memory can be queried through a remote terminal, which facilitates fault tracing and equipment maintenance.

[0071] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A power supply control circuit and switch structure for a UV lamp ballast with multiple protections, characterized in that, The application relates to a remote control ultraviolet lamp power supply system, which comprises the following modules: a power input module (10) for connecting an external direct-current power supply to provide direct-current power for the whole circuit system; a switch control module (20) adopting a relay, main contacts of which are arranged in series between the power input module (10) and the input end of an ultraviolet lamp ballast module (40) to control the on-off of the ultraviolet lamp ballast power supply circuit; the coil of the relay is driven by a control driving module (70) to realize remote or automatic control of the ultraviolet lamp; an overcurrent protection module (30) adopting a PTC self-recovery fuse, which is arranged in series between the main contacts of the switch control module (20) and the input end of the ultraviolet lamp ballast module (40) to realize overcurrent protection of the ultraviolet lamp ballast module (40) and the ultraviolet lamp load module (50) behind the ultraviolet lamp ballast module (40); a surge suppression module (60) adopting an RC suppression circuit, which is arranged in parallel between the main contacts of the switch control module (20) to suppress voltage surges and electromagnetic interference generated in the moment of on-off of the relay; the ultraviolet lamp ballast module (40) is connected with the overcurrent protection module (30) and is used for providing driving energy for the ultraviolet lamp load module (50) to drive the ultraviolet lamp to work; the ultraviolet lamp load module (50) is connected with the ultraviolet lamp ballast module (40) and is used for emitting ultraviolet light under the driving to realize disinfection, purification or illumination functions; the control driving module (70) is used for outputting a control signal to drive the relay of the switch control module (20) to realize control of the on-off of the power supply circuit.

2. A UV lamp ballast power supply control circuit and switching structure with multiple protections as claimed in claim 1, wherein: The switch control module (20) is a relay, the main contacts of the relay are arranged in series in the power supply circuit, the coil of the relay is connected with the control driving module (70), and the on-off control of the relay is realized through a control signal output by the control driving module (70).

3. A UV lamp ballast power supply control circuit and switching structure with multiple protections as defined in claim 1, wherein: The overcurrent protection module (30) is a PTC self-recovery fuse, which is arranged in series between the main contacts of the switch control module (20) and the input end of the ultraviolet lamp ballast module (40).

4. The ultraviolet lamp ballast power supply control circuit and switching structure with multiple protections of claim 1, wherein: The surge suppression module (60) is an RC suppression circuit, which is composed of a resistor and a capacitor arranged in series and is arranged in parallel between the main contacts of the switch control module (20).

5. The ultraviolet lamp ballast power supply control circuit and switching architecture with multiple protection according to claim 1, wherein: The control driving module (70) is an MCU single-chip microcomputer or a special driving chip, the input end of the control driving module (70) can be connected with a remote control signal or an automatic control signal, and the output end of the control driving module (70) is connected with the switch control module (20).

6. A UV lamp ballast power supply control circuit and switching architecture with multiple protections as defined in claim 1, wherein: The voltage of the direct-current power supply connected by the power input module (10) is 12V-48V.

7. A UV lamp ballast power supply control circuit and switching architecture with multiple protections as defined in claim 1, wherein: In the RC suppression circuit, the resistance of the resistor is 100Omega-1kOmega, and the capacity of the capacitor is 0.1uF-1uF.

8. A UV lamp ballast power supply control circuit and switching architecture with multiple protections as defined in claim 1, wherein: The remote interaction module (80) is further arranged, which is used for realizing data interaction and instruction transmission between the equipment and a remote terminal, and comprises a communication module and a memory, which are both bidirectionally connected with the control driving module (70) and are powered by the power input module (10); the communication module selects a WiFi module, a Bluetooth module or an NB-IoT module; the input end of the communication module is connected with the UART interface of the control driving module (70), and the output end of the communication module communicates with the remote terminal through wireless signals; Memory: connected with SPI / I2C interface of control driving module (70), store device running data, storage capacity support at least 1 year history data retention.

9. A UV lamp ballast power supply control circuit and switching architecture with multiple protections as defined in claim 1, wherein: Also include monitoring module (90), for real-time monitoring device working environment and its own state, provide decision basis for control driving module (70), including temperature and humidity sensor, smoke sensor, brightness sensor, all sensor signal output end are connected with ADC interface of control driving module (70), powered by power input module (10); Temperature and humidity sensor: choose digital sensor, installed near the ultraviolet lamp, real-time acquisition of environmental temperature and humidity data and transmission to control driving module (70);When the temperature exceeds the preset value, control driving module (70) trigger power reduction or shutdown protection, avoid high humidity lead to circuit short circuit, temperature too high speed up the light decay; Smoke sensor: choose ion or photoelectric smoke sensor, installed in the safety area of the device, when the detection of smoke concentration exceeds the threshold, immediately send alarm signal to control driving module (70), control driving module (70) quickly cut off the power supply circuit of switch control module (20), at the same time through remote interaction module (80) to remote terminal push smoke alarm information; Brightness sensor: choose ultraviolet light dedicated photoelectric sensor, real-time detection of ultraviolet light intensity data and feedback to control driving module (70);When the light intensity is lower than the preset value, control driving module (70) control ballast to improve the output power for compensation, or through remote interaction module (80) prompt lamp tube aging;When the light intensity is too high, trigger power reduction protection, avoid ballast overload.

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