Intelligent control circuit of air purifier

Abstract

An intelligent control circuit of an air purifier relates to the technical field of control circuits and comprises a control circuit, a voltage source circuit, a fan drive circuit, a negative ion generator drive circuit, a dust cleaning device drive circuit, an ultraviolet sterilization drive circuit and a display circuit. Comprising the air quality index, the operation state of each purification module and the maintenance reminding of the equipment, and the detailed visual feedback not only enables a user to accurately know the working condition of the air purifier, but also enables the user to make rapid adjustment based on real-time data, and optimizes the operation effect of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of control circuits, and in particular to an intelligent control circuit for an air purifier. Background Art

[0002] With the acceleration of urbanization and the increase of industrial pollution, air quality issues have received increasing public attention. In order to improve the air quality of living and working environments, air purifiers have become widely popular around the world. The integration of smart home technology enables air purifiers to be more closely integrated with users' lifestyles, realizing the function of automatically adjusting air quality.

[0003] In the prior art, most air purifiers are only equipped with basic indicator lights or limited digital displays, which are insufficient to provide detailed information about air quality, equipment operating mode, maintenance requirements, etc. Users cannot obtain real-time feedback from these simple display interfaces, such as the current air quality index or the activity status of a specific purification module, such as the specific working conditions of negative ion generation, dust removal or ultraviolet sterilization. The lack of such information not only reduces the convenience of user operation and the interactivity of the equipment, but also greatly affects the user's confidence and satisfaction with the performance of the equipment. Summary of the invention

[0004] The object of the present invention is to address the defects and shortcomings of the prior art. On the one hand, an intelligent control circuit for an air purifier is provided, comprising a control circuit, a voltage source circuit, a fan drive circuit, a negative ion generator drive circuit, a dust cleaning device drive circuit, an ultraviolet sterilization drive circuit and a display circuit. The first control end of the control circuit is connected to the controlled end of the fan drive circuit, the second control end of the control circuit is connected to the controlled end of the negative ion generator drive circuit, the third control end of the control circuit is connected to the controlled end of the dust cleaning device drive circuit, and the fourth control end of the control circuit is connected to the controlled end of the ultraviolet sterilization drive circuit. The output end of the voltage source circuit is respectively connected to the power supply ends of the control circuit, the fan drive circuit, the negative ion generator drive circuit, the dust cleaning device drive circuit and the ultraviolet sterilization drive circuit. The controlled end of the display circuit is connected to the control circuit. The voltage source circuit is used to provide the voltage required by the air purifier control circuit, and the display circuit is used to display the working status and parameters of the air purifier.

[0005] Further, the display circuit includes a display control module, a digital display screen, an LED indication module and an RGB indication module, the LED indication module includes a first LED light array, a second LED light array and a third LED light array, the controlled end of the first LED light array is connected to the first control end of the display control module, the controlled end of the second LED light array is connected to the second control end of the display control module, the controlled end of the third LED light array is connected to the third control end of the display control module, and the digital display screen is electrically connected to the display control module and the control circuit; The RGB indication module includes resistor R26, resistor R27, resistor R28, resistor R29, resistor R30, resistor R31, LED100 and LED200, the resistor R26, resistor R27 and resistor R28 are respectively connected to the anode of the LED100, the cathode of the LED100 is grounded, the resistor R29, resistor R30 and resistor R31 are respectively connected to the anode of the LED200, and the cathode of the LED200 is grounded.

[0006] Further, the fan driving circuit includes a resistor R3, a resistor R8, a resistor R12, a resistor R15, a switch tube Q1, a switch tube Q4, a switch tube D2, an inductor L4, a fan interface and a capacitor C1, one end of the resistor R12 is connected to the first control end of the control circuit, the other end of the resistor R12 is connected to the base of the switch tube Q4 and one end of the resistor R15, the other end of the resistor R15 is connected to the emitter of the switch tube Q4 and the ground terminal, the collector of the switch tube Q4 is connected to one end of the resistor R8, and the other end of the resistor R8 is connected to one end of the resistor R3 and the switch The gate of the switch tube Q1, the other end of the resistor R3 is connected to the source of the switch tube Q1 and the output end of the voltage source circuit, the drain of the switch tube Q1 is connected to the first port of the inductor L4, the second port and the fourth port of the inductor L4 are connected in parallel with the switch tube D2 and the capacitor C1, the third port of the inductor L4 is connected to the ground end, the two ends of the capacitor C1 are connected to the fan interface, the fan driving circuit also includes a resistor R6, the other port of the fan interface FAN is connected to one end of the resistor R6, and the other end of the resistor R6 is connected to the fifth control end of the control circuit.

[0007] Furthermore, the negative ion generator driving circuit includes a switch tube D1, a switch tube Q2, a resistor R4, a resistor R7 and a negative ion generator interface, the second control end of the control circuit is connected to one end of the resistor R4, the other end of the resistor R4 is connected to one end of the resistor R7 and the gate of the switch tube Q2, the other end of the resistor R7 is connected to the source and the ground end of the switch tube Q2, the drain of the switch tube Q2 is connected to the negative ion generator interface and the anode of the switch tube D1, and the cathode of the switch tube D1 is connected to another interface of the negative ion generator interface and the output end of the voltage source circuit.

[0008] Further, the dust cleaning device driving circuit includes a resistor R5, a resistor R10, a resistor R13, a resistor R36, a switch tube Q3, a switch tube Q5 and a dust cleaning device interface, one end of the resistor R13 is connected to the first control end of the control circuit, the other end of the resistor R13 is connected to one end of the resistor R16 and the base of the switch tube Q5, the other end of the resistor R16 is connected to the emitter of the switch tube Q5 and the ground end, the collector of the switch tube Q5 is connected to one end of the resistor R10, the other end of the resistor R10 is connected to one end of the resistor R5 and the gate of the switch tube Q3, the other end of the resistor R5 is connected to the output end of the voltage source circuit and the source of the switch tube Q3, the drain of the switch tube Q3 is connected to the dust cleaning device interface, another dust cleaning device interface is connected to the ground end, one end of the resistor R36 is connected to another dust cleaning device interface, and the other end of the resistor R36 is connected to the third control end of the control circuit.

[0009] Furthermore, the ultraviolet sterilization drive circuit includes a resistor R20, a resistor R21, a switch tube Q6, a switch tube D4 and an ultraviolet sterilization component interface, one end of the resistor R20 is connected to the fourth control end of the control circuit, the other end of the resistor R20 is connected to one end of the resistor R21 and the gate of the switch tube Q6, the other end of the resistor R21 is connected to the source and ground of the switch tube Q6, the drain of the switch tube Q6 is connected to the ultraviolet sterilization component interface and the anode of the switch tube D4, and the cathode of the switch tube D4 is connected to another ultraviolet sterilization component interface and the output end of the voltage source circuit.

[0010] Furthermore, it also includes an infrared receiving circuit, which includes a resistor R22, a resistor R24, a resistor R25, a capacitor C8 and an infrared receiver IR1, a first pin of the infrared receiver IR1 is connected to one end of the resistor R22, the other end of the resistor R22 is connected to one end of the capacitor C8, one end of the resistor R24 ​​and the output end of the voltage source circuit, the other end of the capacitor C8 is connected to the ground end and the second pin of the infrared receiver IR1, the other end of the resistor R24 ​​is connected to the third pin of the infrared receiver IR1 and one end of the resistor R25, and the other end of the resistor R25 is connected to the sixth control end of the control circuit.

[0011] Furthermore, it also includes a buzzer driving circuit, which includes a resistor R23 and a buzzer BUZ1, one end of the resistor R23 is connected to the seventh control end of the control circuit, the other end of the resistor R23 is connected to one end of the buzzer BUZ1, and the other end of the buzzer BUZ1 is grounded.

[0012] Furthermore, it also includes a WIFI module, a humidity detection module and a switch module, the WIFI module, the humidity detection module and the switch module are electrically connected to the control circuit respectively, the power supply ends connected to the WIFI module, the humidity detection module and the switch module are respectively connected to the output ends of the voltage source circuit, the WIFI module is used to connect the air purifier to the Internet, the humidity detection module is used to monitor the humidity level of the environment in real time, and the switch module is used to physically control the power switch of the air purifier.

[0013] On the other hand, the present invention also provides an air purifier, comprising an air purifier intelligent control circuit according to the above technical solution.

[0014] Compared with traditional air purifiers, the embodiments of the present invention can provide comprehensive real-time data display, including air quality index, operating status of each purification module (such as fan speed, negative ion activity, dust cleaning progress and ultraviolet sterilization status), and equipment maintenance reminders. This detailed visual feedback not only allows users to accurately understand the working conditions of the air purifier, but also enables users to make quick adjustments based on real-time data to optimize the operating effect of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1is a structural block diagram of a first embodiment of the present invention; Figure 2 is a circuit diagram of a control circuit in a second embodiment of the present invention; Figure 3 is a circuit diagram of a voltage source circuit in a second embodiment of the present invention; Figure 4 is a circuit diagram of a fan driving circuit in a second embodiment of the present invention; Figure 5 is a circuit diagram of a negative ion generator driving circuit in a second embodiment of the present invention; Figure 6 is a circuit diagram of a dust cleaning device driving circuit in a second embodiment of the present invention; Figure 7 is a circuit diagram of an ultraviolet sterilization driving circuit in a second embodiment of the present invention; Figure 8 is a circuit diagram of an infrared receiving circuit in a second embodiment of the present invention; Fig. 9 is a circuit diagram of a buzzer driving circuit in a second embodiment of the present invention; Fig.10 is a circuit diagram of a display control module in a second embodiment of the present invention; Fig.11 is a circuit diagram of a digital display screen in a second embodiment of the present invention; Fig.12 is a circuit diagram of an LED indicator module in a second embodiment of the present invention; Fig.13 is a circuit diagram of an RGB indicator module in a second embodiment of the present invention; Fig.14 is a circuit diagram of a WIFI module, a humidity detection module and a switch module in a second embodiment of the present invention; Fig.15 is a circuit diagram of a status indication module in a second embodiment of the present invention; Fig.16 4 is a circuit diagram of a key module in the second embodiment of the present invention.

[0017] Reference numerals: 100, control circuit; 200, voltage source circuit; 300, fan drive circuit; 400, negative ion generator drive circuit; 500, dust removal device drive circuit; 600, ultraviolet sterilization drive circuit; 700, infrared receiving circuit; 800, buzzer drive circuit; 900, display circuit; 910, display control module; 920, digital display screen; 930, LED indication module; 931, first LED lamp array; 932, second LED lamp array; 933, third LED lamp array; 940, RGB indication module. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0019] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make non-creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely indicates that the selected embodiments of the present invention are based on the embodiments in the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. First embodiment: Reference Figure 1 The present invention provides an intelligent control circuit for an air purifier, comprising a control circuit 100, a voltage source circuit 200, a fan driving circuit 300, a negative ion generator driving circuit 400, a dust removal device driving circuit 500, an ultraviolet sterilization driving circuit 600 and a display circuit 900, wherein the first control end of the control circuit 100 is connected to the controlled end of the fan driving circuit 300, the second control end of the control circuit 100 is connected to the controlled end of the negative ion generator driving circuit 400, and the third control end of the control circuit 100 is connected to the controlled end of the dust removal device driving circuit 500, The fourth control end of the control circuit 100 is connected to the controlled end of the ultraviolet sterilization drive circuit 600, the output end of the voltage source circuit 200 is respectively connected to the control circuit 100, the fan drive circuit 300, the negative ion generator drive circuit 400, the dust cleaning device drive circuit 500 and the power supply end of the ultraviolet sterilization drive circuit 600, the controlled end of the display circuit 900 is connected to the control circuit 100, the voltage source circuit 200 is used to provide the voltage required by the air purifier control circuit 100, and the display circuit 900 is used to display the working status and parameters of the air purifier.

[0021] Compared with traditional air purifiers, the embodiments of the present invention can provide comprehensive real-time data display, including air quality index, operating status of each purification module (such as fan speed, negative ion activity, dust cleaning progress and ultraviolet sterilization status), and equipment maintenance reminders. This detailed visual feedback not only allows users to accurately understand the working conditions of the air purifier, but also enables users to make quick adjustments based on real-time data to optimize the operating effect of the equipment.

[0022] Second embodiment: Reference Figure 2-16 Optionally, the display circuit 900 includes a display control module 910, a digital display screen 920, an LED indication module 930 and an RGB indication module 940, the LED indication module 930 includes a first LED light array 931, a second LED light array 932 and a third LED light array 933, the controlled end of the first LED light array 931 is connected to the first control end of the display control module 910, the controlled end of the second LED light array 932 is connected to the second control end of the display control module 910, the controlled end of the third LED light array 933 is connected to the third control end of the display control module 910, and the digital display screen 920 is electrically connected to the display control module 910 and the control circuit 100; The RGB indication module 940 includes resistor R26, resistor R27, resistor R28, resistor R29, resistor R30, resistor R31, LED100 and LED200, wherein the resistor R26, resistor R27 and resistor R28 are respectively connected to the anode of LED100, and the cathode of LED100 is grounded, and the resistor R29, resistor R30 and resistor R31 are respectively connected to the anode of LED200, and the cathode of LED200 is grounded.

[0023] Specifically, the first LED lamp array 931 includes LED1, LED7, LED13, LED19, LED25, LED31 and LED37, the second LED lamp array 932 includes LED2, LED8, LED14, LED20, LED26, LED32 and LED38, and the third LED lamp array 933 includes LED3, LED9, LED15, LED21, LED27 and LED33, and the LED1, LED7, LED13, LED19, LED25, LED31 and LED37 are connected to SEGA, SEGB, SEGC, SEGD, SEGE, SEGF and SEGG control circuits respectively, and the LED2, LED8, LED14, LED20, LED26, LED32 and LED38 are connected to SEGA, SEGB, SEGC, SEGD, SEGE, SEGF and SEGG control circuits respectively. D27 and LED33 are connected to SEGA, SEGB, SEGC, SEGD, SEGE, and SEGF control circuits respectively. The display control module 910 includes pins SEGA, SEGB, SEGC, SEGD, SEGE, SEGF, COM1, COM2, COM3, COM4, ​​COM5, and COM6. The COM1 is the first control end of the control module, the COM2 is the second control end of the control module, and the COM3 is the third control end of the control module. The pins COM4, ​​COM5, COM6, SEGA, SEGB, SEGC, SEGD, SEGE, and SEGF are connected to the digital display screen 920. The R26 is connected to the blue end of LED100, the R27 is connected to the green end of LED100, the R28 is connected to the red end of LED100, the R29 is connected to the blue end of LED200, the R30 is connected to the green end of LED200, and the R31 is connected to the red end of LED200.

[0024] Specifically, the display control module 910 also includes capacitors C4, C5, C6, and C7, one end of capacitor C4 is connected to the output end of the voltage source circuit 200, and the other end is grounded, one end of the capacitor C5 is connected to the DIO end of the control circuit 100, one end of the capacitor C6 is connected to the CLK end of the control circuit 100, one end of the capacitor C7 is connected to the STB end of the control circuit 100, and the other end of the capacitor C5, the other end of the capacitor C6, and the other end of the capacitor C7 are grounded.

[0025] Specifically, DIO is a data input and output line used to send and receive data signals. During the communication process with the TM1668 chip, DIO is responsible for transmitting specific display data or commands.

[0026] CLK (Clock) is a clock line used to provide a synchronization signal. During data transmission, the transmission of each data bit needs to be performed when a specific edge of the clock signal (usually a rising edge or a falling edge) occurs to ensure data synchronization and accuracy.

[0027] STB (Strobe) is a strobe line used to start and terminate data transmission sessions. By activating the STB line, the TM1668 chip can know the start and end of a data transmission.

[0028] In this embodiment, the display circuit 900 utilizes an integrated display control module 910, a digital display screen 920, an LED indication module 930, and an RGB indication module 940 to realize a visual display of the status of the air purifier: the display control module 910 is responsible for managing and distributing various display signals through built-in pins (SEGA to SEGG and COM1 to COM6), the COM pin controls different LED light arrays, and the SEG pin controls specific LEDs in these LED light arrays to display different characters or graphics. For example, the first LED light array 931 is activated through the COM1 port, and SEGA to SEGG are used to control the specific LED display. Similarly, the second and third LED light arrays 933 are activated and controlled through the COM2 and COM3 ports, respectively, and the digital display screen 920 receives signals from the display control module 910 through COM4 to COM6 and SEGA to SEGF pins to display more detailed information such as time, operation mode, etc. The RGB indication module 940 includes two groups of LEDs (LED100 and LED200). Each group of LEDs is connected through corresponding resistors (R26 to R31) to control the display of different colors to provide more intuitive operation feedback or status indication. Capacitors C4 to C7 are used to stabilize the signal transmission between the display control module 910 and the control circuit, and reduce signal noise and interference through decoupling and filtering. The DIO, CLK and STB lines are the core of communication. DIO is used for data transmission, CLK provides the necessary clock signal to synchronize data transmission, and STB is used to indicate the start and end of data transmission to ensure accurate reception and processing of data.

[0029] This embodiment not only enhances the clarity of information transmission, but also makes the device operation more intuitive. The addition of RGB LED further enhances the user interaction experience. The working status or warning information of the device is intuitively reflected through the changes in different colors, so that the user can quickly understand the device status even without directly operating the device.

[0030] In addition, the use of capacitors optimizes the stability and reliability of signal transmission, reduces the possibility of misoperation, and ensures the precise execution of commands.

[0031] Optionally, the fan driving circuit 300 includes a resistor R3, a resistor R8, a resistor R12, a resistor R15, a switch tube Q1, a switch tube Q4, a switch tube D2, an inductor L4, a fan interface and a capacitor C1, one end of the resistor R12 is connected to the first control end of the control circuit 100, the other end of the resistor R12 is connected to the base of the switch tube Q4 and one end of the resistor R15, the other end of the resistor R15 is connected to the emitter of the switch tube Q4 and the ground terminal, and the collector of the switch tube Q4 is connected to the first control end of the control circuit 100. The first terminal of the inductor L4 is connected to one end of the resistor R8, the other end of the resistor R8 is connected to one end of the resistor R3 and the gate of the switch tube Q1, the other end of the resistor R3 is connected to the source of the switch tube Q1 and the output end of the voltage source circuit 200, the drain of the switch tube Q1 is connected to the first port of the inductor L4, the second port and the fourth port of the inductor L4 are connected in parallel with the switch tube D2 and the capacitor C1, the third port of the inductor L4 is connected to the ground, and both ends of the capacitor C1 are connected to the fan interface. Specifically, the signal sent by the control circuit through the first control terminal first passes through the resistor R12. This signal is used to control whether the switch tube Q4 is turned on or not. The resistor R12 also plays a role of current limiting to protect the switch tube Q4 from being damaged by excessive current. After the signal is output from R12, it is connected to the base of the switch tube Q4, and is connected to the emitter and ground of Q4 through the resistor R15. R15 serves as a resistor between the base and the emitter to help stabilize the base voltage and ensure that Q4 is reliably turned on.

[0032] Specifically, the collector of the switch tube Q4 is connected to the resistor R8, and the other end of the resistor R8 is connected to the resistor R3 and the gate of the switch tube Q1. This part is designed to transfer the switching state of Q4 to Q1. The switch tube Q4 is turned on after receiving the control signal, thereby affecting the voltage distribution between the resistors R8 and R3, and then controlling whether Q1 is turned on or not.

[0033] Specifically, the switch tube Q1 is responsible for the main current switching function and controls the power supply of the fan circuit. When Q1 is turned on, the current of the voltage source circuit flows to the source of Q1 through R3, and the drain of Q1 is connected to the first port of the inductor L4. The current further flows to the fan. The second port and the fourth port of the inductor L4 are connected to the diode D2 and the capacitor C1. This configuration helps smooth the pulse current generated when the switch tube Q1 is turned on, and reduces the impact of current fluctuations on the operation of the fan. The capacitor C1 plays a role in removing high-frequency noise in the circuit to ensure the stable operation of the circuit. The third port of the inductor L4 is connected to the ground, providing a stable ground line for the entire fan drive circuit. The two ends of the capacitor C1 are directly connected to the fan interface, providing a stable and filtered power input for the fan, thereby ensuring the smooth operation of the fan.

[0034] This embodiment not only ensures the continuous and stable operation of the fan, but also optimizes the overall energy consumption, which is of great significance to improving the performance and economic benefits of the air purifier.

[0035] Optionally, the fan driving circuit 300 further includes a resistor R6 , another port of the fan interface FAN is connected to one end of the resistor R6 , and the other end of the resistor R6 is connected to a fifth control end of the control circuit 100 .

[0036] This embodiment further enhances the control flexibility of the circuit by adding a resistor R6: the resistor R6 connects the fan to the fifth control terminal of the control circuit, so that the control circuit can more accurately monitor and adjust the working state of the fan, thereby achieving more detailed wind speed control.

[0037] Optionally, the negative ion generator driving circuit 400 includes a switch tube D1, a switch tube Q2, a resistor R4, a resistor R7 and a negative ion generator interface, the second control end of the control circuit 100 is connected to one end of the resistor R4, the other end of the resistor R4 is connected to one end of the resistor R7 and the gate of the switch tube Q2, the other end of the resistor R7 is connected to the source and ground of the switch tube Q2, the drain of the switch tube Q2 is connected to the negative ion generator interface and the anode of the switch tube D1, and the cathode of the switch tube D1 is connected to another interface of the negative ion generator interface and the output end of the voltage source circuit 200.

[0038] Specifically, the control circuit sends a control signal through its second control terminal, which first passes through resistor R4. The main function of resistor R4 is to limit the current of the control signal to protect the subsequent circuit from being affected by excessive current. Subsequently, the signal is further transmitted to resistor R7 and the gate of the switch tube Q2. Resistor R7 plays two roles here: on the one hand, it forms a voltage divider network with resistor R4 to adjust the voltage to the gate of Q2; on the other hand, it is connected to the source and ground terminals of Q2 to help stabilize the source voltage of Q2 and ensure its normal operation. The switch tube Q2 controls the power switch of the negative ion generator. When Q2 is turned on, the current can flow from the voltage source circuit through D1, and then flow through Q2 to the negative ion generator interface to power the negative ion generator. The switch tube D1 is responsible for ensuring that the current flows in one direction to prevent reverse current from causing damage to the circuit or the negative ion generator. The design of the entire circuit ensures that the power supply from the control signal to the negative ion generator can be switched quickly and accurately, meeting the requirements of the negative ion generator for power supply stability and response speed.

[0039] In this embodiment, by ensuring the correct direction and flow of the current, the energy consumption and wear during the operation of the equipment are reduced, the service life of the equipment is extended, the optimization of the air purification effect is ensured, and unnecessary energy waste is reduced.

[0040] Optionally, the dust cleaning device driving circuit 500 includes a resistor R5, a resistor R10, a resistor R13, a resistor R36, a switch tube Q3, a switch tube Q5 and a dust cleaning device interface, one end of the resistor R13 is connected to the first control end of the control circuit 100, the other end of the resistor R13 is connected to one end of the resistor R16 and the base of the switch tube Q5, the other end of the resistor R16 is connected to the emitter of the switch tube Q5 and the ground end, the collector of the switch tube Q5 is connected to one end of the resistor R10, the other end of the resistor R10 is connected to one end of the resistor R5 and the gate of the switch tube Q3, the other end of the resistor R5 is connected to the output end of the voltage source circuit 200 and the source of the switch tube Q3, the drain of the switch tube Q3 is connected to the dust cleaning device interface, another dust cleaning device interface is connected to the ground end, one end of the resistor R36 is connected to another dust cleaning device interface, and the other end of the resistor R36 is connected to the third control end of the control circuit 100.

[0041] Specifically, the operation of the circuit in this embodiment starts with a signal sent by the control circuit (100), which is first transmitted through the resistor R13. The function of the resistor R13 is to limit the current, protect the subsequent circuit from the influence of excessive current, and provide an appropriate voltage level to drive the next level of the switch tube. The other end of the resistor R13 is connected to the resistor R16 and the base of the switch tube Q5. The resistor R16 is connected to the emitter of Q5 and ground, which stabilizes the base voltage and completes the voltage division from the base to the emitter of Q5. When the control signal turns on Q5, the collector of Q5 outputs current to the downstream circuit. This current passes through The resistor R10 further transmits the current to the switch tube Q3. The resistor R10 and the resistor R5 are jointly responsible for smoothing and regulating the current and transmitting it to the gate of the switch tube Q3. The resistor R5 is simultaneously connected to the output end of the voltage source circuit (200) and the source of the switch tube Q3 to provide the necessary source voltage for Q3. After receiving the current modulated by Q5, the switch tube Q3 is turned on and outputs the power from its drain to the dust cleaning device interface, thereby starting the dust cleaning device. The resistor R36 connects another dust cleaning device interface to the third control end of the control circuit. This configuration allows the control circuit to monitor and adjust the working state of the dust cleaning device to ensure the accurate execution of the dust cleaning operation.

[0042] This embodiment uses a two-stage switch tube (Q5 and Q3) setting, so that the circuit can achieve fine control of the dust cleaning device, ensuring that when the control signal is received, the dust cleaning device can respond quickly and start working. The configuration of resistors R13, R16, R10 and R5 not only protects the safe operation of the circuit, but also achieves precise regulation of the current and optimizes the efficiency of electric energy use. In addition, this embodiment also includes a feedback mechanism (through resistor R36), allowing the control circuit to adjust the control strategy according to the actual working state of the dust cleaning device, thereby improving the overall working efficiency and the response speed of the system.

[0043] Optionally, the ultraviolet sterilization drive circuit 600 includes a resistor R20, a resistor R21, a switch tube Q6, a switch tube D4 and an ultraviolet sterilization component interface, one end of the resistor R20 is connected to the fourth control end of the control circuit 100, the other end of the resistor R20 is connected to one end of the resistor R21 and the gate of the switch tube Q6, the other end of the resistor R21 is connected to the source and ground of the switch tube Q6, the drain of the switch tube Q6 is connected to the ultraviolet sterilization component interface and the anode of the switch tube D4, and the cathode of the switch tube D4 is connected to another ultraviolet sterilization component interface and the output end of the voltage source circuit 200.

[0044] Specifically, the working process of this embodiment starts at the fourth control terminal of the control circuit (100). The control signal sent from this terminal first passes through the resistor R20. The function of the resistor R20 is to perform preliminary processing on the signal, mainly to limit the current, so as to protect the subsequent circuit from being damaged by high current. The other end of the resistor R20 is connected to the resistor R21 and the gate of the switch tube Q6. The resistor R21 further stabilizes the current within a safe range and is connected to the source and ground of Q6, which helps to stabilize the voltage of the source of Q6 and ensure the effective and stable conduction of Q6. The switch tube Q6 acts as the main current source in the circuit. The control role has its drain connected to the UV sterilization component interface and the anode of the switch tube D4. The conduction state of the switch tube Q6 directly determines whether the UV sterilization component receives power, thereby starting or stopping the sterilization process. The switch tube D4 is a unidirectional current transmission element, ensuring that the current can only flow from the voltage source to the UV sterilization component to prevent reverse current from causing damage to the circuit or sterilization component. This configuration ensures that when the control circuit sends a start signal, the UV sterilization component can respond quickly and start working, and when it is necessary to stop sterilization, the circuit can also quickly cut off the power supply and stop the emission of ultraviolet rays.

[0045] Optionally, it also includes an infrared receiving circuit 700, which includes a resistor R22, a resistor R24, a resistor R25, a capacitor C8 and an infrared receiver IR1, wherein a first pin of the infrared receiver IR1 is connected to one end of the resistor R22, the other end of the resistor R22 is connected to one end of the capacitor C8, one end of the resistor R24 ​​and the output end of the voltage source circuit 200, the other end of the capacitor C8 is connected to the ground end and the second pin of the infrared receiver IR1, the other end of the resistor R24 ​​is connected to the third pin of the infrared receiver IR1 and one end of the resistor R25, and the other end of the resistor R25 is connected to the sixth control end of the control circuit 100.

[0046] The working process of this embodiment starts when the infrared receiver IR1 receives an external infrared signal. The first pin of IR1 is connected to the output end of the voltage source circuit through the resistor R22. The function of the resistor R22 is to limit the current to prevent high current from directly flowing into IR1, thereby protecting the infrared receiver from damage. In addition, R22 also plays a preliminary signal filtering role to help stabilize the input voltage of the infrared receiver. One end of the capacitor C8 is connected to the other end of the resistor R22 and is connected to the second pin of IR1. The other end of C8 is connected to the ground end. The capacitor C8 acts as a decoupling capacitor in the circuit to filter out high-frequency noise in the power supply to ensure that the infrared signal received by IR1 is clear and correct. The resistor R24 ​​is connected between the resistor R22 and the third pin of IR1, and cooperates with the resistor R25 to further process the signal output from IR1. R24 and R25 constitute a voltage divider to adjust the voltage level of the output signal of the infrared receiver to adapt to the input requirements of the subsequent control circuit. The other end of the resistor R25 is connected to the sixth control end of the control circuit to transmit the processed signal to the control circuit to realize the remote control function of the air purifier.

[0047] Optionally, a buzzer driving circuit 800 is also included, and the buzzer driving circuit 800 includes a resistor R23 and a buzzer BUZ1, one end of the resistor R23 is connected to the seventh control terminal of the control circuit 100, the other end of the resistor R23 is connected to one end of the buzzer BUZ1, and the other end of the buzzer BUZ1 is grounded.

[0048] This embodiment achieves effective warning and notification functions through a simple design. The configuration of resistor R23 and buzzer BUZ1 ensures that when the control circuit sends a signal, the buzzer can respond safely and accurately. This direct signal driving method provides users with instant feedback, such as equipment failure, operation confirmation or maintenance reminder, enhancing the user interactivity and safety of the device.

[0049] Optionally, the output voltage of the voltage source circuit 200 is 3.6V-24V.

[0050] Specifically, the voltage source circuit 200 includes capacitors (EC1, C10, EC2, C2), a diode (D3), a voltage conversion chip (U1, model XL1509 SOP-8), and a power interface (CN1) Specifically, the power interface CN1 is connected to the 24V input. This voltage is first initially filtered through capacitors EC1 and C10. Next, the voltage enters the voltage conversion chip U1. The output side of U1 is equipped with capacitors EC2 and C2. These two capacitors are used to further stabilize and filter the output voltage. The diode D3 is connected to the output side of U1 to prevent the voltage from flowing in reverse and protect the circuit. The ground wire (GND) of the entire circuit is connected to the negative pole or ground terminal of all components.

[0051] Specifically, the 24V voltage provided by the power interface CN1 is first preliminarily filtered by EC1 and C10, which helps to remove high-frequency noise and voltage fluctuations in the input power supply. The filtered voltage is sent to the voltage conversion chip U1. U1 is a DC-DC step-down converter whose task is to reduce the input 24V to a lower stable output voltage, usually 5V, for use in other parts of the circuit. The output voltage is further smoothed and stabilized by capacitors EC2 and C2 to ensure that the output stability is not affected by load changes. Diode D3 prevents any possible reverse voltage from damaging the voltage conversion chip or downstream components. This embodiment ensures that the circuit can provide stable and reliable low-voltage output to meet the power requirements of electronic equipment.

[0052] Optionally, it also includes a WIFI module, a humidity detection module and a switch module, wherein the WIFI module, the humidity detection module and the switch module are electrically connected to the control circuit 100, respectively, and the power supply ends connected to the WIFI module, the humidity detection module and the switch module are respectively connected to the output ends of the voltage source circuit 200, the WIFI module is used to connect the air purifier to the Internet, the humidity detection module is used to monitor the humidity level of the environment in real time, and the switch module is used to physically control the power switch of the air purifier.

[0053] Specifically, the WIFI module has TX (transmit) and RX (receive) ports; The switch module includes a resistor R11 (1KΩ); The humidity sensor module includes resistor R18 (1KΩ).

[0054] Specifically, the 5V end of the WIFI module receives power, the TX and RX ends are used for sending and receiving data, and are connected to the ground line to complete the circuit, the switch module is connected to the ground line through resistor R11, and is connected to a control end for triggering the signal, the temperature sensor is also grounded and connected to the 5V power supply through resistor R18, thereby completing its power supply requirements.

[0055] In this embodiment, the WIFI module is responsible for sending and receiving data through the wireless network, enabling the device to be remotely monitored and controlled. The humidity sensor measures the humidity and temperature of the environment. These data can be sent to the network through the WIFI module or used to automatically adjust the environmental control system. By connecting to a 5V power supply, these sensors can stably perform long-term environmental monitoring.

[0056] Reference Fig.15 Optionally, it also includes a status indication module, which includes a light emitting diode RG, a resistor R35 and a capacitor C9.

[0057] Specifically, a 5V power supply is connected to one end (anode) of RG, and the other end (cathode) of RG is connected to the negative end (ground) of the power supply through a 1KΩ resistor R35. The capacitor C9 is connected between the cathode of the LED and the ground, that is, the two ends of the capacitor are connected to the cathode of the LED and the ground point of the circuit respectively.

[0058] When the 5V power supply is turned on, current flows from the power supply through the LED to resistor R35. The function of the resistor is to limit the current flowing through the LED to prevent the LED from being damaged due to excessive current. Capacitor C9 plays the role of decoupling and filtering in the circuit, which helps to smooth voltage fluctuations caused by switching power supply or other circuit interference, and protect the LED from instantaneous voltage spikes, thereby extending the service life of the LED and maintaining its stable operation.

[0059] Reference Fig.16 Optionally, it also includes a key module, which includes six keys (KEY1, KEY2, KEY3, KEY4, KEY5, KEY6) and six resistors (R1, R2, R9, R14, R17, R19).

[0060] In this circuit, each key (KEY1 to KEY6) is directly connected to the corresponding control circuit or processing unit through a resistor (R1, R2, R9, R14, R17, R19). Each resistor is directly connected between the corresponding key and the signal line. There are no other complex connections. This layout is to simplify signal reading and reduce interference to ensure clear transmission of key signals.

[0061] For example, when KEY1 is pressed, the air purifier automatically adjusts the fan speed and the operating intensity of other purification functions according to the currently detected air quality. This mode uses environmental sensors (such as humidity and temperature sensors) to dynamically adjust the settings to ensure the best air quality under different conditions. KEY2 is used to activate sleep mode, in which the device operates at the lowest noise level while maintaining effective air purification. Sleep mode is suitable for use at night, reducing noise interference and helping users enjoy a better sleeping environment.

[0062] By pressing KEY3, users can set the operating time of the air purifier. For example, set the device to automatically shut down after a certain period of time, or start it at a scheduled time. This provides users with more flexibility and efficiency in power use.

[0063] KEY4 is used to turn on or off the UV disinfection function. In this mode, the UV light will be activated to kill bacteria and viruses in the air, providing a more hygienic environment.

[0064] Press KEY5 to activate the negative ion generator. This function releases negative ions into the air, helping to remove dust, smoke and other pollutants in the air, while also improving the freshness of the air.

[0065] The KEY6 allows users to fully manually control all functions of the air purifier, including fan speed, UV disinfection, and negative ion generation. This mode is suitable for users with specific needs for air purification, allowing them to adjust the device settings according to their preferences.

[0066] The above is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. An intelligent control circuit for an air purifier, characterized in that: The invention comprises a control circuit (100), a voltage source circuit (200), a fan driving circuit (300), a negative ion generator driving circuit (400), a dust cleaning device driving circuit (500), an ultraviolet sterilization driving circuit (600) and a display circuit (900), wherein a first control end of the control circuit (100) is connected to a controlled end of the fan driving circuit (300), a second control end of the control circuit (100) is connected to a controlled end of the negative ion generator driving circuit (400), a third control end of the control circuit (100) is connected to a controlled end of the dust cleaning device driving circuit (500), and the control circuit (100) ) is connected to the controlled end of the ultraviolet sterilization drive circuit (600), the output end of the voltage source circuit (200) is respectively connected to the control circuit (100), the fan drive circuit (300), the negative ion generator drive circuit (400), the dust removal device drive circuit (500) and the power supply end of the ultraviolet sterilization drive circuit (600), the controlled end of the display circuit (900) is connected to the control circuit (100), the voltage source circuit (200) is used to provide the voltage required by the air purifier control circuit (100), and the display circuit (900) is used to display the working status and parameters of the air purifier.

2. An intelligent control circuit for an air purifier according to claim 1, characterized in that: The display circuit (900) comprises a display control module (910), a digital display screen (920), an LED indication module (930) and an RGB indication module (940); the LED indication module (930) comprises a first LED light array (931), a second LED light array (932) and a third LED light array (933); the controlled end of the first LED light array (931) is connected to the first control end of the display control module (910); the controlled end of the second LED light array (932) is connected to the second control end of the display control module (910); the controlled end of the third LED light array (933) is connected to the third control end of the display control module (910); the digital display screen (920) is electrically connected to the display control module (910) and the control circuit (100); The RGB indication module (940) comprises a resistor R26, a resistor R27, a resistor R28, a resistor R29, a resistor R30, a resistor R31, an LED 100 and an LED 200, wherein the resistor R26, the resistor R27 and the resistor R28 are respectively connected to the anode of the LED 100, and the cathode of the LED 100 is grounded, and the resistor R29, the resistor R30 and the resistor R31 are respectively connected to the anode of the LED 200, and the cathode of the LED 200 is grounded.

3. The intelligent control circuit of an air purifier according to claim 1, characterized in that: The fan drive circuit (300) comprises a resistor R3, a resistor R8, a resistor R12, a resistor R15, a switch tube Q1, a switch tube Q4, a switch tube D2, an inductor L4, a fan interface and a capacitor C1, one end of the resistor R12 is connected to the first control end of the control circuit (100), the other end of the resistor R12 is connected to the base of the switch tube Q4 and one end of the resistor R15, the other end of the resistor R15 is connected to the emitter of the switch tube Q4 and the ground end, the collector of the switch tube Q4 is connected to one end of the resistor R8, and the other end of the resistor R8 is connected to one end of the resistor R3 and the collector of the switch tube Q1 The gate, the other end of the resistor R3 is connected to the source of the switch tube Q1 and the output end of the voltage source circuit (200), the drain of the switch tube Q1 is connected to the first port of the inductor L4, the second port and the fourth port of the inductor L4 are connected in parallel with the switch tube D2 and the capacitor C1, the third port of the inductor L4 is connected to the ground end, the two ends of the capacitor C1 are connected to the fan interface, and the fan drive circuit (300) further includes a resistor R6, the other end of the fan interface FAN is connected to one end of the resistor R6, and the other end of the resistor R6 is connected to the fifth control end of the control circuit (100).

4. An intelligent control circuit for an air purifier according to claim 3, characterized in that: The negative ion generator drive circuit (400) comprises a switch tube D1, a switch tube Q2, a resistor R4, a resistor R7 and a negative ion generator interface, the second control end of the control circuit (100) is connected to one end of the resistor R4, the other end of the resistor R4 is connected to one end of the resistor R7 and the gate of the switch tube Q2, the other end of the resistor R7 is connected to the source of the switch tube Q2 and the ground end, the drain of the switch tube Q2 is connected to the negative ion generator interface and the anode of the switch tube D1, and the cathode of the switch tube D1 is connected to another interface of the negative ion generator interface and the output end of the voltage source circuit (200).

5. An intelligent control circuit for an air purifier according to claim 4, characterized in that: The dust cleaning device driving circuit (500) comprises a resistor R5, a resistor R10, a resistor R13, a resistor R36, a switch tube Q3, a switch tube Q5 and a dust cleaning device interface, one end of the resistor R13 is connected to the first control end of the control circuit (100), the other end of the resistor R13 is connected to one end of the resistor R16 and the base of the switch tube Q5, the other end of the resistor R16 is connected to the emitter of the switch tube Q5 and the ground end, the collector of the switch tube Q5 is connected to one end of the resistor R10, the other end of the resistor R10 is connected to one end of the resistor R5 and the gate of the switch tube Q3, the other end of the resistor R5 is connected to the output end of the voltage source circuit (200) and the source of the switch tube Q3, the drain of the switch tube Q3 is connected to the dust cleaning device interface, another dust cleaning device interface is connected to the ground end, one end of the resistor R36 is connected to another dust cleaning device interface, and the other end of the resistor R36 is connected to the third control end of the control circuit (100).

6. The intelligent control circuit for an air purifier according to claim 1, characterized in that: The ultraviolet sterilization drive circuit (600) comprises a resistor R20, a resistor R21, a switch tube Q6, a switch tube D4 and an ultraviolet sterilization component interface, one end of the resistor R20 is connected to the fourth control terminal of the control circuit (100), the other end of the resistor R20 is connected to one end of the resistor R21 and the gate of the switch tube Q6, the other end of the resistor R21 is connected to the source and the ground of the switch tube Q6, the drain of the switch tube Q6 is connected to the ultraviolet sterilization component interface and the anode of the switch tube D4, and the cathode of the switch tube D4 is connected to another ultraviolet sterilization component interface and the output end of the voltage source circuit (200).

7. An intelligent control circuit for an air purifier according to claim 1, characterized in that: It also includes an infrared receiving circuit (700), the infrared receiving circuit (700) including a resistor R22, a resistor R24, a resistor R25, a capacitor C8 and an infrared receiver IR1, the first pin of the infrared receiver IR1 being connected to one end of the resistor R22, the other end of the resistor R22 being connected to one end of the capacitor C8, one end of the resistor R24 ​​and the output end of the voltage source circuit (200), the other end of the capacitor C8 being connected to the ground end and the second pin of the infrared receiver IR1, the other end of the resistor R24 ​​being connected to the third pin of the infrared receiver IR1 and one end of the resistor R25, and the other end of the resistor R25 being connected to the sixth control end of the control circuit (100).

8. An intelligent control circuit for an air purifier according to claim 1, characterized in that: It also includes a buzzer drive circuit (800), the buzzer drive circuit (800) including a resistor R23 and a buzzer BUZ1, one end of the resistor R23 is connected to the seventh control end of the control circuit (100), the other end of the resistor R23 is connected to one end of the buzzer BUZ1, and the other end of the buzzer BUZ1 is grounded.

9. The intelligent control circuit for an air purifier according to claim 1, characterized in that: It also includes a WIFI module, a humidity detection module and a switch module, wherein the WIFI module, the humidity detection module and the switch module are electrically connected to the control circuit (100) respectively, and the power supply ends connected to the WIFI module, the humidity detection module and the switch module are respectively connected to the output end of the voltage source circuit (200), the WIFI module is used to connect the air purifier to the Internet, the humidity detection module is used to monitor the humidity level of the environment in real time, and the switch module is used to physically control the power switch of the air purifier.

10. An air purifier, characterized in that: It comprises an intelligent control circuit for an air purifier as described in any one of claims 1 to 9.

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