Air purifier control circuit

Abstract

An air purifier control circuit relates to the technical field of control circuits and comprises a control circuit, a voltage source circuit, a fan driving circuit, a negative ion generator driving circuit, a dust cleaning device driving circuit and an ultraviolet sterilization driving circuit. The speed of the fan is dynamically adjusted, different air quality conditions are adapted, energy-saving purification is achieved, a negative ion generator drive circuit is activated as needed, the negative ion output amount is adjusted according to the actual air condition, particulate matter in air is effectively removed, and meanwhile unnecessary energy consumption is reduced. The dust cleaning device driving circuit automatically adjusts the cleaning frequency and intensity according to the dust detection result, efficient cleaning is kept, meanwhile, the operation cost is reduced, the ultraviolet sterilization driving circuit can control energy consumption while ensuring the sterilization efficiency, and by comprehensively coordinating work of all the modules, the air purification efficiency is improved, and the service life of the air purifier is prolonged. And efficient management of energy is also realized.

Description

Technical Field

[0001] The utility model relates to the technical field of control circuits, in particular to an air purifier control circuit. Background Art

[0002] With the acceleration of urbanization and the increase in 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. Among them, the integration of smart home technology enables air purifiers to be more closely integrated with users' lifestyles and realize the function of automatically adjusting air quality.

[0003] In existing technologies, most air purifiers have relatively simple control systems and are unable to achieve precise functional control, resulting in unsatisfactory operating efficiency and energy utilization. For example, some models are slow to respond to changes in air quality and cannot adjust their operating status in time to adapt to environmental changes, thereby affecting the purification effect and increasing energy consumption. In addition, existing air purifiers often lack control solutions for specific needs (such as high-efficiency dust removal, negative ion release and ultraviolet sterilization). Utility Model Content

[0004] The purpose of the present utility model is to address the defects and shortcomings of the prior art. On the one hand, it provides an air purifier control circuit, including a control circuit, a voltage source circuit, a fan drive circuit, a negative ion generator drive circuit, a dust cleaning device drive circuit and an ultraviolet sterilization drive 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 voltage source circuit is used to provide the voltage required by the air purifier control circuit.

[0005] Furthermore, the fan drive 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 terminal 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, 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, the drain of the switch tube Q1 is connected to the first port of the inductor L4, the second and fourth ports 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 terminal, and both ends of the capacitor C1 are connected to the fan interface.

[0006] Furthermore, the fan driving circuit 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 the fifth control end of the control circuit.

[0007] Furthermore, the negative ion generator drive 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 the other interface of the negative ion generator interface and the output end of the voltage source circuit.

[0008] Furthermore, 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 terminal 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, the 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 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, the output voltage of the voltage source circuit is 3.6V-24V.

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

[0014] The embodiment of the utility model responds to environmental sensor data through the fan drive circuit, dynamically adjusts the fan speed, adapts to different air quality conditions, and achieves energy-saving purification. The negative ion generator drive circuit is activated on demand and adjusts the negative ion output according to the actual air conditions, effectively removing particulate matter in the air while reducing unnecessary energy consumption. The dust cleaning device drive circuit automatically adjusts the cleaning frequency and intensity according to the dust detection results, maintaining efficient cleaning while reducing operating costs. The ultraviolet sterilization drive circuit can ensure sterilization efficiency while controlling energy consumption. Through this comprehensive coordination of the work of each module, this embodiment not only improves the air purification efficiency, but also achieves efficient energy management. 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative labor.

[0016] Figure 1 It is a structural block diagram of the first embodiment of the utility model;

[0017] Figure 2 is a circuit diagram of a control circuit in a second embodiment of the present utility model;

[0018] Figure 3 is a circuit diagram of a voltage source circuit in a second embodiment of the present utility model;

[0019] Figure 4 is a circuit diagram of a fan driving circuit in a second embodiment of the present utility model;

[0020] Figure 5 1 is a circuit diagram of a negative ion generator driving circuit in a second embodiment of the present utility model;

[0021] Figure 6 This is a circuit diagram of a dust cleaning device driving circuit in the second embodiment of the present utility model;

[0022] Figure 7 This is a circuit diagram of the ultraviolet sterilization drive circuit in the second embodiment of the present utility model;

[0023] Figure 8 1 is a circuit diagram of an infrared receiving circuit in a second embodiment of the present utility model;

[0024] Figure 9 1 is a circuit diagram of a buzzer driving circuit in the second embodiment of the present invention.

[0025] Reference numerals:

[0026] 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. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below with reference to the accompanying drawings.

[0028] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] 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 claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0031] First embodiment:

[0032] Reference Figure 1 The utility model provides an air purifier control circuit, including 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 and an ultraviolet sterilization driving circuit 600. 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, the third control end of the control circuit 100 is connected to the controlled end of the dust removal device driving circuit 500, and the fourth control end of the control circuit 100 is connected to the controlled end of the ultraviolet sterilization driving circuit 600. The output end of the voltage source circuit 200 is respectively connected to the power supply ends of the control circuit 100, the fan driving circuit 300, the negative ion generator driving circuit 400, the dust removal device driving circuit 500 and the ultraviolet sterilization driving circuit 600. The voltage source circuit 200 is used to provide the voltage required by the air purifier control circuit 100.

[0033] The embodiment of the utility model responds to environmental sensor data through the fan drive circuit, dynamically adjusts the fan speed, adapts to different air quality conditions, and achieves energy-saving purification. The negative ion generator drive circuit is activated on demand and adjusts the negative ion output according to the actual air conditions, effectively removing particulate matter in the air while reducing unnecessary energy consumption. The dust cleaning device drive circuit automatically adjusts the cleaning frequency and intensity according to the dust detection results, maintaining efficient cleaning while reducing operating costs. The ultraviolet sterilization drive circuit can ensure sterilization efficiency while controlling energy consumption. Through this comprehensive coordination of the work of each module, this embodiment not only improves the air purification efficiency, but also achieves efficient energy management.

[0034] Second embodiment:

[0035] Reference Figure 2-9 ;

[0036] Optionally, the fan drive 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 terminal 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 terminal 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 the two ends of the capacitor C1 are connected to the fan interface.

[0037] Specifically, the signal sent by the control circuit through the first control terminal first passes through resistor R12. This signal is used to control whether the switch tube Q4 is turned on or off. Resistor R12 also acts as a current limiter to protect the switch tube Q4 from damage caused by excessive current. After the signal is output from R12, it is connected to the base of the switch tube Q4 and then connected to the emitter of Q4 and the ground terminal through resistor R15. R15 acts as a resistor between the base and the emitter to help stabilize the base voltage and ensure that Q4 is reliably turned on.

[0038] 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 transmit 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 off.

[0039] 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. The drain of Q1 is connected to the first port of the inductor L4, and 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 by the switch tube Q1 when it is turned on, reducing 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 and ensuring 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 the fan with a stable and filtered power input, thereby ensuring the smooth operation of the fan.

[0040] 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.

[0041] 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 the fifth control end of the control circuit 100 .

[0042] 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 status of the fan, thereby achieving more detailed wind speed control.

[0043] Optionally, the negative ion generator drive 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 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 the other interface of the negative ion generator interface and the output end of the voltage source circuit 200.

[0044] 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, protecting subsequent circuits from the impact of excessive current. The signal is then 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 of the gate of Q2; on the other hand, it is connected to the source of Q2 and the ground terminal, helping to 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, current can flow from the voltage source circuit through D1, and then through Q2 to the negative ion generator interface, powering the negative ion generator. The switch tube D1 is responsible for ensuring unidirectional current flow, preventing reverse current from damaging 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 negative ion generator's requirements for power supply stability and response speed.

[0045] In this embodiment, by ensuring the correct direction and flow of the current, 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.

[0046] 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.

[0047] Specifically, the operation of the circuit in this embodiment begins 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 the 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, providing 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, ensuring the accurate execution of the dust cleaning operation.

[0048] This embodiment uses a two-stage switching tube setting (Q5 and Q3) to enable the circuit to achieve fine control of the dust cleaning device, ensuring that the dust cleaning device can respond quickly and start operation when receiving the control signal. 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 system response speed.

[0049] 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 end 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.

[0050] 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 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 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 serves as a unidirectional current transmission element, ensuring that current can only flow from the voltage source to the UV sterilization component, preventing 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.

[0051] Optionally, an infrared receiving circuit 700 is also included, 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.

[0052] The operation of this embodiment begins when infrared receiver IR1 receives an external infrared signal. The first pin of IR1 is connected to the output of the voltage source circuit via resistor R22. Resistor R22 limits current, preventing high current from flowing directly into IR1, thereby protecting the infrared receiver from damage. In addition, R22 provides preliminary signal filtering, helping to stabilize the input voltage of the infrared receiver. One end of capacitor C8 is connected to the other end of resistor R22 and to the second pin of IR1. The other end of C8 is connected to ground. Capacitor C8 acts as a decoupling capacitor in the circuit, filtering out high-frequency noise in the power supply and ensuring that the infrared signal received by IR1 is clear and accurate. Resistor R24 ​​is connected between resistor R22 and the third pin of IR1 and, in conjunction with resistor R25, further processes the signal output from IR1. R24 and R25 form a voltage divider, adjusting the voltage level of the infrared receiver's output signal to meet the input requirements of the subsequent control circuit. The other end of resistor R25 is connected to the sixth control terminal of the control circuit, transmitting the processed signal to the control circuit, thereby implementing remote control of the air purifier.

[0053] Optionally, a buzzer driving circuit 800 is also included, 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 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.

[0054] 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 drive method provides users with immediate feedback, such as equipment failure, operation confirmation or maintenance reminder, enhancing the user interactivity and safety of the device.

[0055] Optionally, the output voltage of the voltage source circuit 200 is 3.6V-24V.

[0056] 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 supply interface (CN1).

[0057] Specifically, the power interface CN1 is connected to the 24V input. This voltage is first initially filtered by 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. Diode D3 is connected to the output side of U1 to prevent reverse voltage flow and protect the circuit. The ground wire (GND) of the entire circuit is connected to the negative pole or ground terminal of all components.

[0058] 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.

[0059] The above is only used to illustrate the technical solution of the present invention and is not intended 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 air purifier control circuit, 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) and an ultraviolet sterilization driving circuit (600), 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 dust cleaning device. The fourth control end of the control circuit (100) is connected to the controlled end of the ultraviolet sterilization drive circuit (600), and the output end of the voltage source circuit (200) is respectively connected to the power supply end of 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 ultraviolet sterilization drive circuit (600). The voltage source circuit (200) is used to provide the voltage required by the air purifier control circuit (100).

2. An air purifier control circuit 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, and the collector of the switch tube Q4 is connected to One end of the resistor R8 and the other end of the resistor R8 are 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 end, and both ends of the capacitor C1 are connected to the fan interface.

3. An air purifier control circuit according to claim 2, characterized in that: The fan drive circuit (300) further comprises 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 the fifth control end of the control circuit (100).

4. An air purifier control circuit according to claim 3, characterized in that: The negative ion generator drive 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 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 the other interface of the negative ion generator interface and the output end of the voltage source circuit (200).

5. An air purifier control circuit according to claim 4, characterized in that: 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, and 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 air purifier control circuit 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. The air purifier control circuit according to claim 1, characterized in that: The infrared receiving circuit (700) is further included. The infrared receiving circuit (700) includes 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 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).

8. The air purifier control circuit according to claim 1, characterized in that: The device further comprises a buzzer drive circuit (800), wherein the buzzer drive circuit (800) comprises a resistor R23 and a buzzer BUZ1, wherein 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. An air purifier control circuit according to any one of claims 1 to 8, characterized in that: The output voltage of the voltage source circuit (200) is 3.6V-24V.

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

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