UVC photocatalyst purifier control system

Abstract

The utility model relates to a UVC photocatalyst purifier control system, which belongs to the technical field of electric automobiles, and is characterized in that the output end of an EMI (Electro-Magnetic Interference) filtering module is electrically connected with a dormancy module and a communication module respectively; the output end of the dormancy module is electrically connected with the constant-current boost driving module; the microcontroller is in communication connection with the upper computer through the communication module and is used for receiving a control instruction of the upper computer through the communication module; the output end of the microcontroller is electrically connected with the constant-current boost driving module; and the output end of the constant-current boost driving module is electrically connected with the LED load module. According to the UVC photocatalyst purifier control system provided by the utility model, the microcontroller receives an instruction of the upper computer through the communication module to control the constant-current boost driving module to carry out boost constant current and control on and off of an LED load, so that an LED maintains constant power, a photocatalyst is excited to generate a catalytic reaction, and viruses in a vehicle are killed so as to effectively purify air.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle technology, and in particular to a UVC photocatalytic purifier control system. Background Technology

[0002] With the increasing number of cars on the global road, the harmful gases and particulate matter emitted by vehicles are having a more and more serious impact on the environment and human health. Although electric vehicles (EVs) reduce exhaust emissions, they still require effective air purification systems to improve in-vehicle air quality and protect the health of drivers and passengers.

[0003] In new energy vehicles, limitations in battery technology and space constraints place higher demands on the design of in-vehicle air purification systems. Existing in-vehicle air purifiers mostly employ physical filtration methods such as HEPA filters or activated carbon filters.

[0004] While existing technologies can remove most particulate matter and some gaseous pollutants, their effectiveness in removing bacteria, viruses, and some volatile organic compounds (VOCs) is limited, and they require regular replacement of filter media, resulting in relatively high operating costs. Utility Model Content

[0005] In view of this, it is necessary to provide a UVC photocatalytic air purifier control system to effectively purify the air by disinfecting the vehicle interior and disinfecting viruses.

[0006] To achieve the above objectives, this utility model provides a UVC photocatalytic air purifier control system, comprising:

[0007] EMI filter module, sleep module, communication module, microcontroller, constant current boost driver module and LED load module;

[0008] The input terminal of the EMI filter module is connected to the power supply, and the output terminal of the EMI filter module is electrically connected to the sleep module and the communication module respectively.

[0009] The output terminal of the sleep module is electrically connected to the constant current boost drive module;

[0010] The microcontroller is connected to the host computer via the communication module, and is used to receive control commands from the host computer via the communication module, and send the control commands to the constant current boost drive module;

[0011] The output terminal of the microcontroller is electrically connected to the constant current boost drive module;

[0012] The output terminal of the constant current boost drive module is electrically connected to the LED load module.

[0013] One possible implementation also includes: a bus current acquisition module;

[0014] The output terminal of the sleep module is electrically connected to the bus current acquisition module;

[0015] The output terminal of the bus current acquisition module is electrically connected to the constant current boost drive module.

[0016] One possible implementation also includes: a voltage regulator module;

[0017] The input terminal of the voltage regulator module is electrically connected to the EMI filter module;

[0018] The output terminal of the voltage regulator module is electrically connected to the microcontroller and the communication module, respectively.

[0019] In one possible implementation, the communication module employs LIN communication, CAN communication, or CANFD communication.

[0020] In one possible implementation, the microcontroller is an MCU or a DSP.

[0021] In one possible implementation, the EMI filtering module consists of a common-mode inductor, a differential-mode inductor, and a capacitor.

[0022] In one possible implementation, the LED load module includes at least one LED.

[0023] In one possible implementation, the constant current boost drive module is used to boost the input voltage to the voltage required by the LED load module.

[0024] In one possible implementation, the constant current boost drive module is used to provide a constant current to the LED load module.

[0025] In one possible implementation, the constant current boost drive module is used to control the switching on and off of the LED load module.

[0026] The beneficial effects of this utility model are as follows: The UVC photocatalytic air purifier control system provided by this utility model filters the voltage entering the system through the EMI filter module to obtain a stable and clean electrical signal. The sleep module can cut off the bus electrical signal when no communication request is received, allowing the system to enter sleep mode to reduce system power consumption. The microcontroller can receive instructions from the host computer through the communication module, control the constant current boost drive module to boost the voltage and maintain constant current, control the opening and closing of the LED load, and enable the LED to maintain a constant power, stimulate the photocatalyst to produce a catalytic reaction, thereby decomposing harmful substances in the air and effectively purifying the air by disinfecting the vehicle interior. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 One of the structural schematic diagrams of an embodiment of the UVC photocatalytic air purifier control system provided by this utility model;

[0029] Figure 2 A circuit diagram of an embodiment of the sleep module provided by this utility model;

[0030] Figure 3 A circuit diagram of an embodiment of the boost constant current drive module provided by this utility model;

[0031] Figure 4 This is a second schematic diagram of an embodiment of the UVC photocatalytic purifier control system provided by this utility model. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0033] In the description of the embodiments of this utility model, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0034] The terms "first," "second," etc., used in the embodiments of this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a technical feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0035] Figure 1 A schematic diagram of one embodiment of the UVC photocatalytic air purifier control system provided by this utility model is shown below. Figure 1 As shown, the UVC photocatalytic air purifier control system includes:

[0036] EMI filter module 110, sleep module 120, communication module 130, microcontroller 140, constant current boost driver module 150 and LED load module 160;

[0037] The input terminal of the EMI filter module 110 is connected to the power supply, and the output terminal of the EMI filter module 110 is electrically connected to the sleep module 120 and the communication module 130 respectively.

[0038] The output terminal of the sleep module 120 is electrically connected to the constant current boost drive module 150;

[0039] The microcontroller 140 is connected to the host computer via the communication module 120, and is used to receive control commands from the host computer via the communication module 120, and send the control commands to the constant current boost drive module 150.

[0040] The output terminal of the microcontroller 140 is electrically connected to the constant current boost drive module 150;

[0041] The output terminal of the constant current boost drive module 150 is electrically connected to the LED load module 160.

[0042] It should be noted that UVC refers to the C-band of the ultraviolet spectrum, with a wavelength range of 200-275 nanometers, and possesses strong bactericidal and disinfecting capabilities. In this embodiment of the invention, the LED load module includes a light-emitting diode capable of emitting the ultraviolet C-band spectrum.

[0043] An LED load module can be a single LED or an LED string, or an LED string with multiple channels.

[0044] The input terminal of the EMI filter module is connected to the power supply. The power input is a low-voltage connector, providing a channel for power input and information exchange.

[0045] The EMI filter module is used to filter out external noise and simultaneously suppress the spread of interference generated by internal motors. Through the EMI filter module, a stable and clean electrical signal can be output to the sleep module and the communication module.

[0046] The hibernation module is connected in series on the bus and is controlled by the communication module. When no communication is received, it will cut off the bus electrical signal and the system will enter global hibernation, with the static current dropping to below 50uA.

[0047] The microcontroller connects to the host computer via a communication module, allowing it to receive control commands from the host computer. The host computer can exchange information with the microcontroller via a bus protocol, sending control commands to the microcontroller. The microcontroller then sends these commands to the constant current boost driver module, which in turn controls the LEDs to turn on and off.

[0048] The microcontroller's output is connected to the constant current boost driver module, and the constant current boost driver module's output is connected to the LED load module; that is, the microcontroller, constant current boost driver module, and LED load module are connected in sequence. The microcontroller, as the system's main controller, can receive control commands from the host computer and control the states of the constant current boost driver module and LED load module according to the commands.

[0049] The constant current boost driver module can boost the input voltage to the voltage required by the LED load module and keep the current constant, thereby ensuring the uniformity of light emission of the LED string.

[0050] The LED load module emits ultraviolet C-band light to achieve photocatalytic purification. Driven by the constant current boost driver module, the LED emits ultraviolet light that irradiates the photocatalyst, exciting it to produce a catalytic reaction that decomposes harmful substances in the air.

[0051] Compared with the prior art, the UVC photocatalytic air purifier control system provided in this embodiment of the utility model filters the voltage entering the system through the EMI filter module to obtain a stable and clean electrical signal. The sleep module can cut off the bus electrical signal when no communication request is received, allowing the system to enter sleep mode to reduce system power consumption. The microcontroller can receive instructions from the host computer through the communication module to control the constant current boost drive module to boost the voltage and maintain constant current, control the opening and closing of the LED load, and enable the LED to maintain a constant power, stimulate the photocatalyst to produce a catalytic reaction, thereby decomposing harmful substances in the air and effectively purifying the air by disinfecting the vehicle interior.

[0052] In some embodiments of this utility model, it further includes: a bus current acquisition module 170;

[0053] The sleep module 120 is connected in series on the busbar; the output terminal of the sleep module 120 is electrically connected to the busbar current acquisition module 170;

[0054] The output terminal of the bus current acquisition module 170 is electrically connected to the constant current boost drive module 150.

[0055] The hibernation module is connected in series with the bus and disconnects from the bus after not receiving a communication request.

[0056] Connecting a dormant module in series on the busbar reduces static losses. A busbar current acquisition module is then connected to the downstream end to monitor the busbar current, effectively preventing irreversible faults caused by system overcurrent. The busbar current acquisition module can also integrate overload protection, further enhancing system safety.

[0057] The vehicle battery enters the circuit system through the power module, and after passing through the EMI filter module, it outputs a stable and clean electrical signal to the hibernation module.

[0058] Figure 2 A circuit diagram of an embodiment of the hibernation module provided by this utility model is shown below. Figure 1 and Figure 2 As shown, the sleep module is a bridge connecting the power supply and the current acquisition module. The sleep module is controlled by the communication module. When no communication is received, it will cut off the bus electrical signal and the system will enter global sleep mode, with the static current dropping to below 50uA.

[0059] The bus current acquisition module connects the sleep module and the constant current and constant voltage drive module. The bus current acquisition module constantly feeds back the magnitude of the current signal in the bus to the microcontroller, which can be an MCU or a DSP. The microcontroller uses control algorithms to protect the bus current from harming the control system.

[0060] In some embodiments of this utility model, it further includes: a voltage regulator module 180;

[0061] The input terminal of the voltage regulator module 180 is electrically connected to the EMI filter module 110;

[0062] The output terminal of the voltage regulator module 180 is electrically connected to the microcontroller 140 and the communication module 130, respectively.

[0063] The voltage regulator module can be a low dropout regulator (LDO) used to convert higher voltages into lower and more stable voltages, providing a stable output voltage even when the input voltage is higher than the output voltage.

[0064] The voltage regulator module and the EMI filter module are connected to regulate the input voltage and output a stable voltage to the microcontroller and the communication module.

[0065] The microcontroller serves as the core control unit, while the communication module is responsible for data transmission between the system and other devices. Both require a stable power supply from the voltage regulator module to ensure their normal operation.

[0066] In some embodiments of this utility model, the communication module 130 adopts LIN communication, CAN communication or CANFD communication.

[0067] The communication module can be any of LIN communication, CAN communication, or CANFD communication, thereby enabling data transmission between the system and other devices.

[0068] In some embodiments of this utility model, the microcontroller 140 is an MCU or a DSP.

[0069] A microcontroller can be a microcontroller unit (MCU) or a digital signal processor (DSP).

[0070] The microcontroller is the main control chip of the system, which executes requests from the host computer and implements system protection such as temperature, voltage, and current.

[0071] The host computer communicates with the microcontroller via a bus protocol and sends control commands to the microcontroller through a communication module, thereby controlling the LED load module to turn on and off.

[0072] In some embodiments of this utility model, the EMI filter module 110 is composed of a common-mode inductor, a differential-mode inductor, and a capacitor.

[0073] The EMI power filter module is an interference signal suppression unit composed of common-mode inductors, differential-mode inductors, and capacitors.

[0074] Common-mode inductors are used to suppress common-mode noise in circuits while allowing differential-mode signals to pass through normally. Common-mode inductors utilize the electromagnetic interference (EMI) suppression effect of inductance to reduce common-mode noise by increasing the impedance of common-mode current. When common-mode current flows through a common-mode inductor, the inductance impedes the current flow, thus reducing its interference to other circuits or devices.

[0075] Differential-mode inductors are used to suppress differential-mode noise in circuits while having minimal impact on common-mode signals. They utilize the electromagnetic interference (EMI) suppression effect of inductance to reduce differential-mode noise by increasing the impedance of the differential-mode current. When differential-mode current flows through a differential-mode inductor, the inductance impedes the current flow, thus reducing its interference to other circuits or devices.

[0076] Capacitors are used as bypass or decoupling capacitors to filter out high-frequency noise and smooth voltage fluctuations. Capacitors can absorb and release charge, thus filtering out high-frequency noise in a circuit. When high-frequency noise appears in a circuit, a capacitor can quickly charge and discharge, converting the noise energy into heat and dissipating it, thereby reducing the impact of noise on other circuits or devices.

[0077] For example, connecting capacitors of appropriate capacitance in parallel across the common-mode and differential-mode inductors can further suppress high-frequency common-mode and differential-mode noise.

[0078] In some embodiments of this utility model, the constant current boost drive module 150 is used to boost the input voltage to the voltage required by the LED load module 160.

[0079] In some embodiments of this utility model, the constant current boost drive module 150 is used to provide constant current to the LED load module 160.

[0080] In some embodiments of this utility model, the constant current boost drive module 150 is used to control the on and off of the LED load module 160.

[0081] Figure 3 A circuit diagram of one embodiment of the boost constant current drive module provided by this utility model is shown below. Figure 3 As shown, the constant current boost driver module has three functions: DC-DC boost, constant current load, and power switch control. The constant current boost driver module has a high degree of integration, saving cost and space, and reducing the failure rate.

[0082] The constant current boost driver module can boost a wide input voltage to the voltage required by the LED load module and maintain a constant current, ensuring the uniformity of LED string illumination. This not only better controls the intensity of ultraviolet radiation but also extends the lifespan of the LED string. It also acts as a power switch for the LED string.

[0083] The constant current boost driver module is a key driver chip. It can function as a DC-DC boost unit, boosting the input voltage to the required voltage for the LED string. It can also act as a load constant current unit, ensuring a constant current output from the LED string. Furthermore, it can function as a power control unit, controlling the switching on and off of the LED string.

[0084] Figure 4 A second schematic diagram of an embodiment of the UVC photocatalytic air purifier control system provided by this utility model is shown below. Figure 4 As shown, this utility model provides a UVC photocatalytic purifier control system, including a power input, an EMI power filter module, a sleep module, a communication module, a microcontroller module, an LED constant current boost driver module, and an LED load module.

[0085] like Figure 4As shown, after the 9-16V battery voltage enters the system, it passes through an EMI filter module to filter out external noise and simultaneously suppress the spread of interference generated by internal motoring. Then, it is boosted and kept constant current by an LED constant current boost drive module to control the switching on and off of the LED load. It possesses important functions such as sleep wake-up, overvoltage protection, temperature protection, and vehicle-machine interaction. It boasts significant advantages including a simplified structure, low cost, small size, and good EMC performance, and is easy to implement.

[0086] The specific solution is as follows: The vehicle battery enters the circuit system through the power module, and after passing through the EMI circuit, a stable and clean electrical signal is output to the sleep circuit. The sleep circuit module is a bridge connecting the power supply and current acquisition. The sleep circuit module is controlled by communication chips such as LIN or CAN. When no communication is received, the bus electrical signal will be cut off, and the system will enter global sleep mode with a static current as low as 50uA.

[0087] The current acquisition and sleep circuit module is connected to the LED constant current and constant voltage drive module. During current acquisition, the magnitude of the current signal in the bus is fed back to the microcontroller. The microcontroller can be an MCU or a DSP. The microcontroller protects the bus current from harming the control system through a reasonable control algorithm.

[0088] The LED constant current boost driver module is the core of this system design. It boosts a wide input voltage to the voltage required by the LED load module and maintains a constant current, ensuring the uniformity of light emission from the LED string. This not only better controls the intensity of ultraviolet radiation but also extends its lifespan. It also acts as a power switch for the LED string.

[0089] The sleep / wake-up module reduces the static power consumption of the system when it is not in use.

[0090] The LED constant current boost driver module has three important functions: DC-DC boost, load constant current, and power switch control. It boosts a wide input voltage to the voltage required by the LED load module and maintains a constant current, ensuring the uniformity of light emission from the LED string. This not only better controls the intensity of ultraviolet radiation but also extends its lifespan. It also acts as the power switch for the LED string.

[0091] This invention provides a UVC photocatalytic air purifier control system that can interact with the vehicle's infotainment system. It can maintain a constant power for the LED within a wide input voltage range and a wide temperature range, thereby stimulating the photocatalyst to achieve the best effect of eliminating viruses and purifying the air. It also has excellent EMC capabilities. With its excellent layout and reliable external protection circuit, its radiation emission can pass level 5, and its interference immunity reaches level A.

[0092] This invention provides an architectural design for a UVC photocatalytic air purifier control system, achieving constant power across the entire temperature range of -40℃ to 125℃ and constant power across a wide voltage range of 9V to 16V, effectively triggering the photocatalyst to achieve better purification results.

[0093] The above provides a detailed description of the UVC photocatalytic air purifier control system provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A UVC photocatalytic air purifier control system, characterized in that, The application relates to a power supply device for LED load, which comprises an EMI filtering module, a sleep module, a communication module, a microcontroller, a constant-current boost driving module and an LED load module. The input end of the EMI filtering module is connected with a power supply, and the output end of the EMI filtering module is respectively connected with the sleep module and the communication module. The output end of the sleep module is connected with the constant-current boost driving module. The microcontroller is connected with an upper computer through the communication module, is used for receiving a control instruction of the upper computer through the communication module, and sends the control instruction to the constant-current boost driving module. The output end of the microcontroller is connected with the constant-current boost driving module. The output end of the constant-current boost driving module is connected with the LED load module. The application further comprises a bus current acquisition module.

2. The UVC photocatalytic purifier control system of claim 1, wherein, The output end of the sleep module is connected with the bus current acquisition module. The output end of the bus current acquisition module is connected with the constant-current boost driving module. The application further comprises a voltage stabilizing module. The input end of the voltage stabilizing module is connected with the EMI filtering module.

3. The UVC photocatalytic purifier control system of claim 1, wherein, The output end of the voltage stabilizing module is respectively connected with the microcontroller and the communication module. The communication module adopts LIN communication, CAN communication or CANFD communication. The microcontroller is an MCU or a DSP. The EMI filtering module is composed of a common-mode inductor, a differential-mode inductor and a capacitor.

4. The UVC photocatalytic purifier control system of claim 1, wherein, The LED load module comprises at least one LED.

5. The UVC photocatalytic purifier control system of claim 1, wherein, The constant-current boost driving module is used for boosting input voltage to voltage required by the LED load module.

6. The UVC photocatalytic purifier control system of claim 1, wherein, The constant-current boost driving module is used for providing constant current to the LED load module.

7. The UVC photocatalytic purifier control system of claim 1, wherein, The constant-current boost driving module is used for controlling the opening and closing of the LED load module.

8. The UVC photocatalytic purifier control system of claim 1, wherein, ​ 9. The UVC photocatalytic purifier control system of claim 1, wherein, ​ 10. The UVC photocatalytic purifier control system of claim 1, wherein, ​

Images