Disinfecting wardrobe lamp circuit

Abstract

The utility model discloses a sterilization wardrobe lamp circuit, aims at solving the problem of manual switching of existing wardrobe lamp lighting and sterilization, ultraviolet easy to hurt human body and clothes. Circuit includes power module, PIR module, bluetooth control module, lighting drive module and inverter output module, power module receives DC 24V adapter voltage, converts 5V (for PIR module), 3.3V (for bluetooth module), and directly supplies 24V for lighting, inverter module, PIR module real -time detection human signal, feedback to bluetooth control module, bluetooth module according to human signal, through double control end linkage lighting (open) and inverter (close), reverse switching when no one, lighting module realizes luminance regulation through double PWM drive, and inverter module drives UV lamp through multi -tapped transformer high -efficiently. The case realizes " there is someone lighting, no one sterilization " intelligent linkage, has low -voltage safety, remote control function, is applicable to domestic sterilization wardrobe.

Description

Technical Field

[0001] This utility model relates to the field of lighting equipment technology, specifically to a sterilization wardrobe light circuit. Background Technology

[0002] With the development of smart homes, sterilization wardrobes, as home furnishing products that combine storage and disinfection functions, have seen their core sterilization wardrobe lighting circuitry become crucial for enhancing the user experience. Most products have independent control over lighting and sterilization functions, requiring manual switching. They cannot automatically adjust based on the presence of people, posing safety hazards such as accidental activation of sterilization when someone is present, or the inconvenience of forgetting to turn on sterilization when no one is around.

[0003] Chinese Patent Publication No. CN111905122A discloses a smart controllable lighting and sterilization dual-purpose lamp, which relates to the field of lighting equipment technology. It includes lighting beads, UV beads, and a driving circuit. The driving circuit includes a flyback power supply circuit, a DC-to-DC power conversion circuit, a switching circuit for turning the lighting beads on and off, and a microcontroller connected to the switching circuit and the DC-to-DC power conversion circuit. The flyback power supply circuit includes an EMC module, a power conversion circuit, and a rectifier and filter circuit. The EMC module is connected to the mains power, the power conversion circuit is connected to the EMC module and located on the primary coil side of the flyback power supply circuit, and the rectifier and filter circuit is located on the secondary coil side and connected to the lighting beads. The positive output terminal of the rectifier and filter circuit is connected to the DC-to-DC power conversion circuit, which converts the voltage of the lighting circuit into a voltage compatible with the UV lamp. This patent combines lighting and ultraviolet sterilization functions into one, and the lighting and sterilization functions cannot be turned on simultaneously, saving resources and providing high safety. However, the following technical problems still exist: 1. Lack of automatic human body sensing safety protection: The above patents mainly rely on radio frequency remote control or switching circuits for manual / remote switching, which cannot detect human approach in real time and react immediately. If the user forgets to turn off the sterilization function and approaches, there is a safety risk.

[0004] 2. Complex power supply architecture: The above patents use a flyback power supply + DC-DC conversion circuit to power the UV lamp tube, which results in a complex power supply path and room for optimization in efficiency and cost.

[0005] Therefore, overcoming the aforementioned shortcomings has become an important issue that urgently needs to be addressed by those skilled in the art. Utility Model Content

[0006] This invention overcomes the shortcomings of the above-mentioned technology and provides a sterilization wardrobe light circuit. This invention addresses the problems of existing wardrobe lights requiring manual switching between lighting and sterilization functions and lacking intelligent linkage, as well as the issue of UV lamps causing ultraviolet damage to humans due to a lack of human protection. Furthermore, through low-voltage power supply and a high-efficiency inverter design, it solves the problem of UV lamps causing ultraviolet damage to clothing and other items inside the wardrobe due to unstable radiation power. To achieve the above objectives, this utility model adopts the following technical solution: A sterilizing wardrobe light circuit includes: a power supply module 1, a PIR module 2, a Bluetooth control module 3, a lighting drive module 4, and an inverter output module 5. The power supply module 1 receives a DC 24V safe voltage from an external adapter and converts it to a 5V operating voltage for the PIR module 2 and a 3.3V voltage for the Bluetooth control module 3. The output terminal of the PIR module 2 is electrically connected to the Bluetooth control module 3, used to detect human infrared signals in real time and output a sensing signal to the Bluetooth control module 3. The Bluetooth control module 3 is electrically connected to both the lighting drive module 4 and the inverter output module 5. It has a first control output terminal T1 connected to the control input terminal of the lighting drive module 4 and a second control output terminal T2 connected to the control input terminal of the inverter output module 5, used to send control commands to the lighting drive module 4 and the inverter output module 5 respectively based on the detected human infrared signals. The lighting drive module 4 drives the sterilizing wardrobe light to emit light according to the control commands, and the inverter output module 5 drives the UV lamp to sterilize according to the control commands, thus achieving automatic lighting when someone is present and automatic sterilization when no one is present. In addition, the power supply module 1 also provides 24V voltage to the lighting drive module 4 and the inverter output module 5.

[0007] Preferably, the external adapter outputs a DC 24V voltage.

[0008] Preferably, the power supply module 1 includes: a switching power conversion circuit 11 connected to an external adapter and a linear voltage regulator circuit 12 connected to the output terminal of the switching power conversion circuit 11; the power supply module 1 is provided with a first power supply output terminal T11 that directly outputs the 24V DC voltage from the external adapter, to power the lighting drive module 4 and the inverter output module 5. The switching power conversion circuit 11 includes a switching power chip U3 and its peripheral circuits. The input terminal of the switching power chip U3 is connected to the 24V DC voltage provided by the external adapter, and its output terminal serves as the second power supply output terminal T12, outputting a 5V DC voltage to power the PIR module 2. The linear voltage regulator circuit 12 includes a first low-dropout linear regulator chip U2 and its peripheral circuits. The input terminal of the first low-dropout linear regulator chip U2 is connected to the 5V DC voltage provided by the second power supply output terminal T12, and its output terminal serves as the third power supply output terminal T13, outputting a 3.3V DC voltage to power the Bluetooth control module 3.

[0009] Preferably, the switching power supply chip U3 is model OC5864; the first low dropout linear regulator chip U2 is model MAX1117.

[0010] Preferably, the PIR module 2 includes a second low-dropout linear regulator chip U4 and a pyroelectric infrared sensor CON1; The pyroelectric infrared sensor CON1 is provided with a sensing input terminal T21 for receiving human infrared thermal signals, an enabling control terminal T22 for enabling control, a detection output terminal T23 for outputting the human infrared thermal signal detection result and outputting it to the Bluetooth control module 3, and a sensing delay setting terminal T24 for adjusting the output duration after sensing. The input terminal of the second low-dropout linear regulator chip U4 is connected to the power supply module 1, and the output terminal is grounded through the first resistor R17 and the first polarized capacitor (EC3) connected in sequence. The output terminal of the second low-dropout linear regulator chip U4 is connected to the sensing delay setting terminal T24 through the second resistor R18, to the sensing input terminal T21 through the third resistor R19, and to the enable control terminal T22 through the fourth resistor R20. The sensing delay setting terminal T24 is grounded through the fifth resistor R25, the sensing input terminal T21 is grounded through the sixth resistor R26, and the enable control terminal T22 is grounded through the seventh resistor R27.

[0011] Preferably, the pyroelectric infrared sensor CON1 uses an NS612 chip.

[0012] Preferably, the Bluetooth control module 3 includes: a Bluetooth Mesh control chip U1 and its peripheral circuits; the Bluetooth Mesh control chip U1 is provided with a detection input terminal T4 connected to the PIR module 2 for receiving the detection result signal of the PIR module, a first control output terminal T1 connected to the control input terminal of the lighting drive module 4, and a second control output terminal T2 connected to the control input terminal of the inverter output module.

[0013] Preferably, the Bluetooth control module 3 is configured to: when a human signal is detected by the PIR module 2, control the lighting drive module 4 to turn on through the first control output terminal T1, and control the inverter output module 5 to turn off through the second control output terminal T2.

[0014] Preferably, the lighting drive module 4 includes at least one PWM signal input circuit, a MOS transistor drive branch corresponding to each PWM signal input circuit, and a lighting device connection interface COM1; each PWM signal input circuit is connected to the Bluetooth control module 3 and includes a current-limiting resistor and a pull-down resistor connected in sequence; when it is a single PWM signal input circuit, it includes a seventh resistor R7 and a first pull-down resistor R9; when it is two PWM signal input circuits, it also includes a second PWM signal input circuit, which includes an eighth resistor R8 and a second pull-down resistor R10; each MOS transistor drive branch includes a MOS transistor and a resistor network composed of multiple resistors connected in parallel, the gate of the MOS transistor is connected to the output terminal of the corresponding PWM signal input circuit, the source is grounded, the drain is connected to one end of the resistor network, and the other end of the resistor network is connected to the corresponding power supply terminal of the lighting device connection interface COM1; when it is a single MOS transistor drive branch, it is a first MOS transistor drive branch 43, including a first MOS transistor Q1 and a first resistor network 431; when it is two MOS transistors... The transistor drive branch also includes a second MOS transistor drive branch 44, which includes a second MOS transistor Q2 and a second resistor network 441.

[0015] Preferably, the inverter output module 5 includes, in sequence: a control signal input circuit 51, a transistor switching circuit 52, a transformer 53, and a UV lamp connection interface CON2; the transformer 53 includes a primary winding and a secondary winding; the primary winding has multiple taps for receiving signals output by the transistor switching circuit 52; the secondary winding is used to output the inverted AC voltage; the UV lamp connection interface CON2 is for connecting external UV lamps. The control signal input circuit 51 is connected to the second control output terminal T2 and includes a ninth resistor R28 and a third pull-down resistor R29 connected in sequence, used to receive the control signal for controlling the on / off state of the UV lamp. The transistor switching circuit 52 includes: a first NPN transistor Q3, a second NPN transistor Q5, a third NPN transistor Q6, a PNP transistor Q4, a tenth resistor R21, an eleventh resistor R22, a twelfth resistor R23, and a thirteenth resistor R24. The base of the second NPN transistor Q5 is connected to the output terminal of the control signal input circuit 51, its emitter is grounded, and its collector is connected to the base of the PNP transistor Q4 through the twelfth resistor R23; the emitter of the PNP transistor Q4 is connected to the power supply output terminal of the power supply module 1, its collector is connected to the base of the first NPN transistor Q3 through the eleventh resistor R22, and its collector is also connected to the base of the third NPN transistor Q6 through the thirteenth resistor R24; the base of the first NPN transistor Q3 is connected to the second tap of the primary winding of the transformer 53, its collector is connected to the third tap of the primary winding of the transformer 53, and its emitter is grounded; A first capacitor C7 is connected between the collectors of the first NPN transistor Q3 and the third NPN transistor Q6; the base of the third NPN transistor Q6 is connected to the first tap of the primary winding of the transformer 53, the collector is connected to the fifth tap of the primary winding of the transformer 53, and the emitter is grounded; the power output terminal of the power supply module 1 is connected to the base of the PNP transistor Q4 by the tenth resistor R21, and the collector of the PNP transistor Q4 is connected to the third tap of the primary winding of the transformer 53 by the first inductor L3.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. This solution uses a PIR module to detect the presence of a human in front of the wardrobe in real time. Once a human is detected, the Bluetooth control module immediately cuts off the power supply to the UV lamp of the inverter output module and simultaneously turns on the lighting. When no one is present, sterilization is automatically activated, forming a hardware linkage closed loop of "human presence - sterilization off" and "human departure - sterilization on". No manual operation is required, which fundamentally solves the problem of ultraviolet radiation damage to the human body caused by the lack of automatic protection in existing lamps. It realizes automatic human body sensing protection and completely avoids the risk of ultraviolet damage.

[0017] 2. This design employs isolated DC 24V low-voltage power supply, directly powering the lighting driver module and inverter output module, completely eliminating the risk of high-voltage electric shock. The inverter output module utilizes a "transistor switching circuit + transformer multi-tap" design to efficiently invert 24V DC into the AC voltage required by the UV lamp, improving conversion efficiency. Furthermore, capacitors and inductors suppress switching noise, preventing UV lamps from causing UV damage to clothing and other items due to voltage fluctuations, thus balancing safety and sterilization reliability. In this way, a low-voltage safety architecture combined with a high-efficiency inverter design achieves a balance between safety and practicality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this case.

[0019] Figure 2 This is the circuit diagram of the power supply module of this case in Embodiment 1.

[0020] Figure 3 This is the circuit diagram of the PIR module in Embodiment 1 of this case.

[0021] Figure 4 This is a circuit diagram of the Bluetooth control module in Embodiment 1.

[0022] Figure 5 This is a circuit diagram of the lighting drive module in Embodiment 1.

[0023] Figure 6 This is a circuit diagram of the inverter output module of Embodiment 1.

[0024] Figure 7 This is a circuit diagram of the lighting drive module in Embodiment 2. Detailed Implementation

[0025] The following examples provide a more detailed description of the features and other related characteristics of this utility model, to facilitate understanding by those skilled in the art: like Figures 1 to 6 As shown, the sterilization wardrobe light circuit of this utility model mainly includes: a power supply module 1, a PIR module 2, a Bluetooth control module 3, a lighting drive module 4, and an inverter output module 5.

[0026] The power supply module 1 receives a safe DC 24V voltage from an external adapter and converts it: one output is converted to a 5V operating voltage to power the PIR module 2; the other output is converted to 3.3V to power the Bluetooth control module 3. In addition, the power supply module 1 also directly provides 24V to power the lighting driver module 4 and the inverter output module 5.

[0027] The output of the PIR module 2 is electrically connected to the signal input of the Bluetooth control module 3. During operation, it is used to detect infrared signals from people in front of the wardrobe in real time and output this sensing signal to the Bluetooth control module 3.

[0028] The Bluetooth control module 3 serves as the control core, and it has a first control output terminal T1 and a second control output terminal T2. The first control output terminal T1 is connected to the control input terminal of the lighting drive module 4; the second control output terminal T2 is connected to the control input terminal of the inverter output module 5. Furthermore, the Bluetooth control module 3 can also wirelessly communicate with a mobile terminal APP.

[0029] The Bluetooth control module 3 analyzes and judges the human infrared signal received from the PIR module 2, and sends corresponding control commands to the lighting drive module 4 and the inverter output module 5 respectively: when a person is detected, it sends an on command to the lighting drive module 4 through the first control output terminal T1, and sends an off command to the inverter output module 5 through the second control output terminal T2; when no person is detected, it sends the opposite command.

[0030] The lighting drive module 4 is used to drive the LED lights of the sterilization wardrobe light to emit light according to the received control commands.

[0031] The inverter output module 5 is used to drive the UV lamp to start according to the received control command to perform ultraviolet sterilization.

[0032] Through the coordinated operation of the above modules, this utility model realizes the intelligent function of the wardrobe light automatically providing illumination when someone is present and automatically performing ultraviolet sterilization when no one is present, which is both safe and convenient.

[0033] As described above, the sterilization wardrobe light circuit in this case achieves intelligent integration and diversified control of lighting and ultraviolet sterilization functions through Bluetooth control module 3. It integrates human infrared signal reception, lighting drive control, inverter output control, and mobile terminal wireless communication functions into one, breaking the limitation of traditional wardrobe lights that can only provide basic lighting and significantly improving the functionality and reliability of the system. By integrating PIR module 2 and ultraviolet sterilization unit into the circuit, PIR module 2 can detect the presence of a human body in front of the wardrobe in real time and feed it back to Bluetooth control module 3. When a person is detected, it immediately cuts off the sterilization program of inverter output module 5 and simultaneously turns on lighting drive module 4. When no one is present, it automatically switches to sterilization mode, forming dual safety protection from the hardware level. At the same time, Bluetooth control module 3 supports wireless connection with mobile APP, and users can flexibly set the sterilization time through APP, solving the problems of single function and inconvenient operation of traditional sterilization equipment. In addition, the circuit adopts an isolated DC24V low-voltage design. The power supply module 1 directly supplies power to the lighting drive module 4 and the inverter output module 5 with DC24V, without the need for high-voltage conversion, thus completely avoiding the risk of high-voltage electric shock.

[0034] In a preferred embodiment, the external adapter outputs a DC 24V voltage. Specifically, an external adapter with an output specification of "DC 24V / 2A" can be selected, whose output voltage fluctuation range is ≤±5%. This allows it to directly provide 24V DC power to the first power output terminal T11 of the power supply module without additional boost / buck processing, simplifying the circuit structure. Furthermore, 24V voltage has low loss during transmission, making it suitable for providing sufficient power to the high-power LED lamps of the lighting driver module 4 and the UV lamps of the inverter output module 5. Thus, by limiting the external adapter output to DC 24V, a stable input is provided for the multi-voltage conversion of the subsequent power supply module. 24V is a low-voltage safety voltage, reducing the risk of circuit use. At the same time, the standardized input voltage facilitates compatibility with commonly available industrial-grade power adapters, improving product versatility.

[0035] like Figure 2 As shown, the power supply module 1 includes a switching power conversion circuit 11 connected to an external adapter and a linear voltage regulator circuit 12 connected to the output terminal of the switching power conversion circuit 11. Specifically, the power supply module 1 has a first power supply output terminal T11 that outputs a 24V DC voltage, a second power supply output terminal T12 that outputs a 5V DC voltage converted by the switching power conversion circuit 11, and a third power supply output terminal T13 that outputs a 3.3V DC voltage converted by the linear voltage regulator circuit 12. The first power supply output terminal T11 supplies power to the lighting driver module 4 and the inverter output module 5.

[0036] The switching power conversion circuit 11 includes a switching power supply chip U3 and its peripheral circuitry. The switching power supply chip U3 is an OC5864. The input terminal of the switching power supply chip U3 is connected to a 24V DC voltage provided by the external adapter, and its output terminal outputs a 5V DC voltage to power the PIR module 2.

[0037] The linear regulator circuit 12 includes a first low-dropout linear regulator chip U2 and its peripheral circuitry. The first low-dropout linear regulator chip U2 is a MAX1117. The input terminal of the first low-dropout linear regulator chip U2 is connected to a 5V DC voltage provided by the second power supply output terminal T12, and its output terminal outputs a 3.3V voltage to power the Bluetooth control module 3.

[0038] As described above, the power supply module in this case provides a suitable 5V operating voltage for the PIR module and a stable 3.3V operating voltage for the Bluetooth control module, ensuring that the PIR module can accurately detect human infrared signals in real time and feed them back to the Bluetooth control module. Moreover, the power supply module in this case adopts a simplified architecture with external DC24V input and on-demand hierarchical conversion. The 24V voltage is directly led out from the first power supply output terminal to power the lighting drive module and the inverter output module. There is no need for complex circuits such as the EMC module of the flyback power supply and secondary rectification and filtering. Only the OC5864 switching power supply chip (24V→5V) and MAX1117 linear regulator chip (5V→3.3V) are used to achieve two-stage low voltage conversion. This reduces the number of components and energy loss in the power path, improves the power conversion efficiency to over 85%, and reduces the complexity of circuit design and manufacturing costs. At the same time, the selection of mature chips further ensures the stability of power supply, taking into account safety, efficiency and economy. In addition, the switching power supply conversion circuit 11 is highly efficient and suitable for providing 5V power to the PIR module; the linear voltage regulator circuit 12 has low ripple, ensuring the signal stability of the Bluetooth control module; at the same time, the directly led 24V output powers the high-power module, avoiding voltage conversion losses.

[0039] like Figure 3 As shown, the PIR module 2 includes a second low-dropout linear regulator chip U4 and a pyroelectric infrared sensor CON1; The pyroelectric infrared sensor CON1 is provided with a sensing input terminal T21 for receiving human infrared thermal signals, an enabling control terminal T22 for enabling control, a detection output terminal T23 for outputting the human infrared thermal signal detection result and outputting it to the Bluetooth control module 3, and a sensing delay setting terminal T24 for adjusting the output duration after sensing. The input terminal (VIN pin in the figure) of the second low-dropout linear regulator chip U4 is connected to the power supply module 1, and the output terminal (VOUT pin in the figure) is grounded through the first resistor R17 and the first polarized capacitor (EC3) connected in sequence. The output terminal of the second low-dropout linear regulator chip U4 is connected to the sensing delay setting terminal T24 through the second resistor R18, to the sensing input terminal T21 through the third resistor R19, and to the enable control terminal T22 through the fourth resistor R20. The sensing delay setting terminal T24 is grounded through the fifth resistor R25, the sensing input terminal T21 is grounded through the sixth resistor R26, and the enable control terminal T22 is grounded through the seventh resistor R27. The pyroelectric infrared sensor CON1 uses an NS612 chip. In specific implementation, this PIR module is based on the Senba NS612 chip, combined with external resistors (R17, R18, R19, R20, R25, R26, R27) and capacitor EC3. The power supply section uses U4 (TX7533MM) to convert the externally input 5V voltage to 3.3V or 3V to provide the operating voltage for the Senba NS612 chip. In the signal detection and processing section, the sensing input terminal T21, i.e., the SENS pin of the NS612, is used to receive human infrared thermal signals. When a human infrared thermal signal is detected, the internal circuitry is triggered. In the output and control section, the detection output terminal T23, i.e., the OUT pin, is used to output the detection result signal; the enable control terminal T22, i.e., the OEN pin, can be used for enable control; and the sensing delay setting terminal T24, i.e., the ONTIME pin, can adjust the output duration after sensing. External resistors R17-R20 and R25-R27 mainly serve as voltage dividers and current limiters, while capacitor EC3 is used for filtering and stabilizing the circuit operation. When a human body is detected during the sterilization period, the OUT pin outputs a corresponding signal, thereby controlling the cessation of sterilization and the activation of lighting; when a human body is not detected during the sterilization period, a signal is also output through the OUT pin to activate lighting.

[0040] As described above, the PIR module in this case uses the NS612 pyroelectric infrared sensor as its core. The second low-dropout linear regulator chip accurately converts the 5V voltage input from the power supply module into a 3V or 3.3V adapter voltage. After being filtered by resistor R17 and polarized capacitor EC3, it provides stable power to the sensor. At the same time, through the peripheral network composed of resistors R18-R20 and R25-R27, the signal reception of the sensing input terminal (SENS pin), the function enable terminal (OEN pin), and the output duration adjustment of the sensing delay setting terminal (ONTIME pin) are respectively realized, ensuring that the sensor can detect human infrared signals in real time and accurately. When a human body is detected, a signal is promptly sent to the Bluetooth control module via the detection output terminal (OUT pin) to trigger the linkage action of stopping sterilization and turning on the lighting. When no one is present, the system logic is used to switch functions, breaking away from the limitations of existing patents that rely on manual / remote switching. This provides reliable support for human safety protection from the hardware level of the sensing circuit. At the same time, the reasonable configuration of external resistors and capacitors improves the stability and anti-interference ability of signal detection, ensuring the timeliness and accuracy of the sensing response.

[0041] like Figure 4 As shown, the Bluetooth control module 3 in this case includes: a Bluetooth Mesh control chip U1 and its peripheral circuitry; the Bluetooth Mesh control chip U1 has a detection input terminal T4 connected to the PIR module 2 for receiving the detection result signal from the PIR module, a first control output terminal T1 connected to the control input terminal of the lighting drive module 4, and a second control output terminal T2 connected to the control input terminal of the inverter output module. Specifically, a Bluetooth Mesh chip of model MHCB12S can be used, which conforms to the Bluetooth Mesh V1.0 standard and supports self-organizing network functionality; it is mainly used for smart home devices (such as smart lamps, home appliance controllers, etc.) to achieve synchronous control and remote updates of multiple devices through a Bluetooth Mesh network. For example, it can realize wireless communication with the Mi Home app. The Bluetooth control module 3 is configured to: when a human signal is detected by the PIR module 2, control the lighting drive module 4 to turn on through the first control output terminal T1, and control the inverter output module 5 to turn off through the second control output terminal T2. Furthermore, the RF pin of the Bluetooth Mesh control chip U1 is connected to an antenna for transmitting and receiving Bluetooth wireless signals.

[0042] As described above, the Bluetooth control module in this case uses the Bluetooth Mesh control chip U1 as its core. Its self-organizing network function enables stable wireless communication with mobile terminals, breaking through the limitations of existing patents that rely solely on manual or radio frequency remote control. Simultaneously, the chip receives human body detection signals from the PIR module in real time via the detection input terminal T4, and then links the lighting drive module and inverter output module via the first and second control output terminals respectively. This allows for precise execution of the automatic control logic of turning on the lighting and turning off the sterilization function when someone is present, and reversing the switching when no one is present. This achieves a closed loop of "sensing-judgment-execution," ensuring that the wardrobe light in this case has an automatic human body protection function, significantly improving the safety protection level and eliminating the safety hazard of forgetting to turn off the sterilization function. Furthermore, the logic control is implemented through the Bluetooth control chip, eliminating the need for an additional microcontroller and reducing circuit complexity and cost. Specifically, the MHCB12S chip is used. Its mature architecture, which conforms to the Bluetooth Mesh V1.0 standard, not only ensures the stability and compatibility of wireless communication (compatible with mainstream smart home apps such as Mi Home), but also supports multi-device synchronous control and remote updates, facilitating future expansion of multi-wardrobe collaborative management or function upgrades. At the same time, the chip's low-power optimized design for smart home scenarios can reduce system standby power consumption, further improving the practicality and economy of the overall solution.

[0043] like Figure 5 As shown, the lighting drive module 4 includes a first PWM signal input circuit 41, a second PWM signal input circuit 42, a first MOS transistor drive branch 43, a second MOS transistor drive branch 44, and a lighting device connection interface COM1; The first PWM signal input circuit 41 is connected to the Bluetooth control module 3 and includes a seventh resistor R7 and a first pull-down resistor R9 connected in sequence; the second PWM signal input circuit 42 is connected to the Bluetooth control module 3 and includes an eighth resistor R8 and a second pull-down resistor R10 connected in sequence. The first MOS transistor drive branch 43 includes a first MOS transistor (Q1) and a first resistor network 431 composed of resistors R1, R2, and R3 connected in parallel. The gate of the first MOS transistor (Q1) is connected to the output terminal of the first PWM signal input circuit 41, the source is grounded, and the drain is connected to one end of the first resistor network 431. The other end of the first resistor network 431 is connected to a power supply terminal of the lighting device connection interface COM1. The second MOS transistor drive branch 44 includes a second MOS transistor (Q2) and a second resistor network 441 composed of resistors R4, R5, and R6 connected in parallel. The gate of the second MOS transistor (Q2) is connected to the output terminal of the second PWM signal input circuit 42, the source is grounded, and the drain is connected to one end of the second resistor network 441. The other end of the second resistor network 441 is connected to the other power supply terminal of the lighting device connection interface COM1.

[0044] The lighting driver module in this case mainly relies on the switching characteristics of MOSFETs, combined with PWM signals and resistor networks to achieve the driving control of lighting equipment, as detailed below: 1. Signal Input and Preprocessing: PWM_W and PWM_Y are two PWM control signals, output by the module to different branches. Specifically, they can be cool white PWM signals and warm white PWM signals representing different color temperatures.

[0045] 2. MOSFET drive: When the PWM_W signal is high, current flows through R7 into the gate of Q1, turning Q1 on. At this time, the COM1 interface connects to the lighting equipment, such as LED light groups, forming a circuit, and the lighting equipment is powered on. When the PWM_W signal is low, the gate of Q1 is grounded through R9, Q1 is turned off, and the lighting equipment is de-energized. The control logic of the PWM_Y branch for Q2 is the same as the control logic of the PWM_W branch for Q1.

[0046] 3. The role of resistor networks: The first resistor network composed of R1, R2, R3, R4, R5, and R6, and the second resistor network, are used to limit the current of the LED beads and stabilize the 24V adapter voltage. This current limiting provides better protection for the LED beads and also has a certain anti-interference effect, stabilizing the circuit operation and preventing the MOSFET from being falsely triggered due to voltage fluctuations.

[0047] As described above, the lighting driver module in this case employs a dual-path PWM signal input circuit. Through resistor current limiting and pull-down resistor design, it stably receives the PWM signal output from the Bluetooth control module. This signal is then routed through an independent MOSFET drive branch to achieve branched control of the lighting device's connection interface. The dual MOSFETs, each paired with a resistor network composed of multiple resistors in parallel, not only allow for precise control of lighting brightness by adjusting the PWM duty cycle but also provide current shunting protection for the MOSFETs and lighting device, preventing overload risks associated with a single resistor. This dual-path independent drive design not only supports independent control of dual-color-temperature LEDs (such as separate brightness adjustment for cool white and warm white LEDs) but also responds to switching commands issued by the Bluetooth control module based on PIR sensing signals, achieving intelligent linkage of "automatic light on when someone is present, automatic light off when no one is present." This overcomes the shortcomings of existing technologies, such as single lighting control modes and insufficient drive reliability. Furthermore, the resistor network and pull-down resistor configuration enhance the circuit's anti-interference capability, ensuring the stability and safety of the lighting driver.

[0048] This effectively improves the flexibility and reliability of lighting control, while also meeting the overall intelligent linkage requirements of the system.

[0049] like Figure 6 As shown, in a specific implementation, the inverter output module 5 includes a control signal input circuit 51, a transistor switching circuit 52, a transformer 53, and a UV lamp connection interface CON2 connected in sequence; the UV lamp connection interface CON2 is for connecting an external UV lamp. The transformer 53 includes a primary winding and a secondary winding; the primary winding has multiple taps for connecting signals output by the transistor switching circuit 52; the secondary winding is used to output the inverted AC voltage. The control signal input circuit 51 is connected to the second control output terminal T2, and includes a ninth resistor R28 and a third pull-down resistor R29 connected in sequence, for receiving control signals to control the on / off state of the UV lamp; The transistor switching circuit 52 includes a first NPN transistor Q3, a second NPN transistor Q5, a third NPN transistor Q6, a PNP transistor Q4, a tenth resistor R21, an eleventh resistor R22, a twelfth resistor R23, and a thirteenth resistor R24. The base of the second NPN transistor Q5 is connected to the output terminal of the control signal input circuit 51, the emitter is grounded, and the collector is connected to the base of the PNP transistor Q4 through the twelfth resistor R23. The emitter of the PNP transistor Q4 is connected to the first power supply output terminal T11 of the power supply module 1, and the collector is connected to the base of the first NPN transistor Q3 through the eleventh resistor R22. The collector is also connected to the base of the third NPN transistor Q6 through the thirteenth resistor R24. The base of the first NPN transistor Q3 is connected to the second tap of the primary winding of transformer 53, the collector is connected to the third tap of the primary winding of transformer 53, and the emitter is grounded; a first capacitor C7 is connected between the collector of the first NPN transistor Q3 and the collector of the third NPN transistor Q6. The base of the third NPN transistor Q6 is connected to the first tap of the primary winding of transformer 53, the collector is connected to the fifth tap of the primary winding of transformer 53, and the emitter is grounded. The tenth resistor R21 is connected between the first power output terminal T11 of the power supply module 1 and the base of the PNP transistor Q4. The first inductor L3 is connected between the collector of the PNP transistor Q4 and the third tap of the primary winding of the transformer 53. Specifically, after the control signal input circuit 51 of the inverter output module 5 receives a high-level signal from the Bluetooth control module, the second NPN transistor Q5 turns on, and the base of the PNP transistor Q4 is pulled low and turns on. The 24V voltage triggers the first NPN transistor Q3 to turn on via Q4 and the eleventh resistor R22, and simultaneously triggers the third NPN transistor Q6 to turn on alternately via the thirteenth resistor R24. The switching action of Q3 and Q6 causes an alternating current to be generated in the primary winding of the transformer T1, inducing a 380V AC voltage in the secondary winding. After being filtered by capacitor C6, this voltage powers the 10W UV lamp through the CON2 interface. Inductor L3 and capacitor C7 suppress voltage spikes during the switching process, ensuring stable operation of the UV lamp.

[0050] As described above, the inverter output module in this case is based on a simple architecture of control signal input, transistor switching, and transformer inversion. Through the resistor current limiting and pull-down design of the control signal input circuit, it stably receives the on / off commands from the Bluetooth control module. Then, via a multi-transistor switching circuit and a multi-tap design on the primary side of the transformer, it efficiently inverts the 24V DC voltage directly provided by the power supply module into the AC voltage required by the UV lamp. This eliminates the need for existing flyback power supplies and multi-stage DC-DC conversions, simplifying the power path and improving inverter efficiency. Simultaneously, the reasonable configuration of resistors, capacitors, and inductors in the transistor switching circuit effectively suppresses switching noise and voltage spikes, protecting the transformer and UV lamp from impacts. The standardized design of the UV lamp connection interface adapts to external UV lamps of different power, enhancing compatibility. Furthermore, this module, through a second control output terminal linked with the Bluetooth control module, can automatically turn off when someone is present and automatically start when no one is present, based on the human body detection signal from the PIR module, thus addressing multiple requirements such as high-efficiency inversion, circuit reliability, and intelligent safety control.

[0051] In summary, this project aims to solve the problems of manual switching between lighting and sterilization in existing wardrobe lights, and the potential for UV damage to people and clothing, through modular circuit design, precise power conversion, intelligent linkage control, and standardized component selection. The circuit includes power supply, PIR, Bluetooth control, lighting driver, and inverter output modules. The power supply module receives DC24V adapter voltage, converts it to 5V (for the PIR module) and 3.3V (for the Bluetooth module), and directly supplies 24V to the lighting and inverter modules. The PIR module uses an NS612 sensor to detect human signals in real time and feeds them back to the Bluetooth control module. Based on the human signal, the Bluetooth module uses dual control terminals to link the lighting on and the inverter off, reversing the switching when no one is present. The lighting module uses dual PWM drives to adjust brightness, and the inverter module efficiently drives the UV lamp through a multi-tap transformer. This project achieves intelligent linkage of "lighting when someone is present, sterilization when no one is present," and also features low-voltage safety and remote control functions, making it suitable for home sterilization wardrobes. It also solves the problems of safety hazards, unstable power supply, and single control in existing sterilization wardrobe light circuits, and has the advantages of "safety and reliability, intelligence and convenience, and strong compatibility", and can be widely used in household sterilization wardrobes, intelligent storage cabinets and other products.

[0052] Example 2 like Figure 7 As shown, the difference between Embodiment 2 and Embodiment 1 is that the lighting driving module 4 includes a first PWM signal input circuit 411, a first MOS transistor driving branch 412, and a lighting device connection interface COM1; The first PWM signal input circuit 41 is connected to the Bluetooth control module 3, including a seventh resistor R7 and a first pull-down resistor R9 connected in sequence; the first MOS transistor drive branch 43 includes a first MOS transistor (Q1) and a first resistor network 413 composed of resistors R1, R2, and R3 connected in parallel. The gate of the first MOS transistor (Q1) is connected to the output terminal of the first PWM signal input circuit 41, the source is grounded, and the drain is connected to one end of the first resistor network 413. The other end of the first resistor network 413 is connected to a power supply terminal of the lighting device connection interface COM1. Thus, the lighting drive module of this case, by setting a single PWM signal input circuit, stably receives the PWM signal output by the Bluetooth control module through resistor current limiting and pull-down resistor design, and then realizes the branch control of the lighting device connection interface through an independent MOS transistor drive branch.

[0053] As stated above, this case protects a sterilization wardrobe light circuit, and all technical solutions that are the same as or similar to this case should be considered to fall within the protection scope of this case.

Claims

1. A germicidal wardrobe lamp circuit, characterized by include: The power supply module (1), PIR module (2), Bluetooth control module (3), lighting drive module (4), and inverter output module (5) are configured to provide working voltage. The input terminal of the power supply module (1) is used to connect to an external adapter, and its output terminal is connected to the PIR module (2), Bluetooth control module (3), lighting drive module (4), and inverter output module (5) respectively. The output terminal of the PIR module (2) is connected to the input terminal of the Bluetooth control module (3). The Bluetooth control module (3) is provided with a first control output terminal (T1) connected to the control input terminal of the lighting drive module (4) and a second control output terminal (T2) connected to the control input terminal of the inverter output module (5). The lighting drive module (4) is used to drive the lighting equipment of the sterilization wardrobe lamp to emit light according to the control command output by the first control output terminal (T1). The inverter output module (5) is used to drive the UV lamp of the sterilization wardrobe lamp to sterilize according to the control command output by the second control output terminal (T2).

2. The circuit of claim 1, wherein, The external adapter outputs a DC 24V voltage.

3. The circuit of claim 2, wherein, The power supply module (1) includes: a switching power conversion circuit (11) connected to an external adapter and a linear voltage regulator circuit (12) connected to the output terminal of the switching power conversion circuit (11); the power supply module (1) is provided with a first power supply output terminal (T11) that directly outputs the 24V DC voltage from the external adapter, which supplies power to the lighting drive module (4) and the inverter output module (5); The switching power conversion circuit (11) includes a switching power chip (U3) and its peripheral circuits. The input terminal of the switching power chip (U3) is connected to the 24V DC voltage provided by the external adapter, and its output terminal serves as the second power supply output terminal (T12), outputting a 5V DC voltage to power the PIR module (2). The linear regulator circuit (12) includes a first low-dropout linear regulator chip (U2) and its peripheral circuit. The input terminal of the first low-dropout linear regulator chip (U2) is connected to the 5V DC voltage provided by the second power supply output terminal (T12), and its output terminal serves as the third power supply output terminal (T13), outputting a 3.3V DC voltage to power the Bluetooth control module (3).

4. The circuit of claim 3, wherein, The switching power supply chip (U3) is model OC5864; the first low dropout linear regulator chip (U2) is model MAX1117.

5. The germicidal wardrobe lamp circuit of claim 1, wherein, The PIR module (2) includes a second low-dropout linear regulator chip (U4) and a pyroelectric infrared sensor (CON1). The input terminal of the second low-dropout linear regulator chip (U4) is connected to the power supply module (1), and the output terminal is grounded through the first resistor (R17) and the first polarized capacitor (EC3). At the same time, the output terminal of the second low-dropout linear regulator chip (U4) is connected to the sensing delay setting terminal (T24) of the pyroelectric infrared sensor (CON1) through the second resistor (R18), to the sensing input terminal (T21) of the pyroelectric infrared sensor (CON1) through the third resistor (R19), and to the enable control terminal (T22) of the pyroelectric infrared sensor (CON1) through the fourth resistor (R20). The pyroelectric infrared sensor (CON1) has a sensing delay setting terminal (T24) grounded via a fifth resistor (R25), a sensing input terminal (T21) grounded via a sixth resistor (R26), and an enable control terminal (T22) grounded via a seventh resistor (R27); and the pyroelectric infrared sensor (CON1) is provided with a detection output terminal (T23) for outputting the human body infrared thermal signal detection result and outputting it to the Bluetooth control module (3).

6. The germicidal wardrobe lamp circuit of claim 5, wherein, The pyroelectric infrared sensor (CON1) uses an NS612 chip.

7. The germicidal wardrobe lamp circuit of claim 1, wherein, The Bluetooth control module (3) includes: a Bluetooth Mesh control chip (U1) and its peripheral circuits; the Bluetooth Mesh control chip (U1) is provided with a detection input terminal (T4) connected to the PIR module (2) for receiving the detection result signal of the PIR module, a first control output terminal (T1) connected to the control input terminal of the lighting drive module (4), and a second control output terminal (T2) connected to the control input terminal of the inverter output module.

8. The germicidal wardrobe lamp circuit of claim 1 or 7, wherein, The Bluetooth control module (3) is configured to: when a human signal is detected by the PIR module (2), control the lighting drive module (4) to turn on through the first control output terminal (T1), and control the inverter output module (5) to turn off through the second control output terminal (T2).

9. The sterilization wardrobe light circuit according to claim 1, characterized in that, The lighting drive module (4) includes at least one PWM signal input circuit, a MOS transistor drive branch corresponding to the PWM signal input circuit, and a lighting device connection interface (COM1). Each PWM signal input circuit is connected to the Bluetooth control module (3) and includes a current-limiting resistor and a pull-down resistor connected in sequence. Each MOS transistor drive branch includes a MOS transistor and a resistor network composed of multiple resistors connected in parallel. The gate of the MOS transistor is connected to the output terminal of the corresponding PWM signal input circuit, the source is grounded, the drain is connected to one end of the resistor network, and the other end of the resistor network is connected to the corresponding power supply terminal of the lighting device connection interface (COM1).

10. The germicidal wardrobe lamp circuit of claim 1, wherein, The inverter output module (5) includes, in sequence: a control signal input circuit (51), a transistor switching circuit (52), a transformer (53), and a UV lamp connection interface (CON2) for connecting an external UV lamp. The transformer (53) includes a primary winding and a secondary winding; the primary winding has multiple taps for connecting the signal output by the transistor switching circuit (52); The secondary winding is used to output the inverter-generated AC voltage. The control signal input circuit (51) is connected to the second control output terminal (T2) and includes a ninth resistor (R28) and a third pull-down resistor (R29) connected in sequence, for receiving control signals to control the on / off state of the UV lamp; The transistor switching circuit (52) includes: a first NPN transistor (Q3), a second NPN transistor (Q5), a third NPN transistor (Q6), a PNP transistor (Q4), a tenth resistor (R21), an eleventh resistor (R22), a twelfth resistor (R23), and a thirteenth resistor (R24). The base of the second NPN transistor (Q5) is connected to the output terminal of the control signal input circuit (51), the emitter is grounded, and the collector is connected to the base of the PNP transistor (Q4) through the twelfth resistor (R23). The emitter of the PNP transistor (Q4) is connected to the power output terminal of the power supply module (1), the collector is connected to the base of the first NPN transistor (Q3) through the eleventh resistor (R22), and the collector is also connected to the base of the third NPN transistor (Q6) through the thirteenth resistor (R24). The base of the first NPN transistor (Q3) is connected to the second tap of the primary winding of the transformer (53), the collector is connected to the third tap of the primary winding of the transformer (53), and the emitter is grounded; a first capacitor (C7) is connected between the collectors of the first NPN transistor (Q3) and the third NPN transistor (Q6); The base of the third NPN transistor (Q6) is connected to the first tap of the primary winding of the transformer (53), the collector is connected to the fifth tap of the primary winding of the transformer (53), and the emitter is grounded. The power supply output terminal of the power supply module (1) is connected to the base of the PNP transistor (Q4) by the tenth resistor (R21), and the collector of the PNP transistor (Q4) is connected to the third tap of the primary winding of the transformer (53) by the first inductor (L3).

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