Atomizing sheet driving circuit

Abstract

The utility model discloses an atomization sheet driving circuit, and relates to the technical field of atomization sheets. The driving circuit comprises a control circuit and a plurality of driving units which are connected in parallel, the output end of the control circuit is connected with the input ends of the driving units respectively, the signal output ends of the driving units are connected with the feedback end of the control circuit, and the control circuit controls the driving units to work through time division multiplexing. The plurality of driving units are used for driving the atomization sheet and receiving feedback signals of the plurality of driving units; according to the embodiment of the utility model, a plurality of atomization sheets can be controlled at the same time by introducing a plurality of driving units and through time division multiplexing of the control circuit, so that each atomization sheet can be accurately driven according to the actual resonant frequency of the atomization sheet, and meanwhile, performance fluctuation caused by single-frequency work is avoided; the problems of atomization efficiency and stability are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to atomization piece technical field, concretely relates to a kind of atomization piece drive circuit. BACKGROUND

[0002] With the progress of science and technology, the atomizer has been widely used in many fields, and the main function of the atomizer is to convert liquid into fine mist droplets for better absorption or diffusion. With the increasing market demand, the technology of atomizer is constantly developing and improving, and various forms and functions of atomizer enter the market to meet the needs of different consumers.

[0003] However, the traditional atomizer usually adopts a single frequency adjustment mode, which means that each chip can only control one atomization piece, which not only increases the complexity of the control circuit, but also greatly limits the ability of multiple atomization pieces to work simultaneously, thereby affecting the scalability and overall efficiency of the product. The existing single frequency control scheme cannot meet the efficient and stable operation requirements, so there is an urgent need for a new technical solution that can simultaneously drive multiple atomization pieces and avoid frequency interference. SUMMARY

[0004] The utility model aims at the defects and deficiencies of prior art, on the one hand, provides a kind of atomization piece drive circuit, including control circuit and multiple mutually parallel driving unit, the output end of control circuit is connected the input end of multiple driving unit respectively, the signal output end of multiple driving unit is connected the feedback end of control circuit, control circuit controls multiple driving unit work by time division multiplexing, and receives the feedback signal of multiple driving unit, and the driving unit is used to drive atomization piece.

[0005] Further, the driving unit includes a power supply port, a PWM input module, an LC module, a switching module, a feedback module and an atomization piece interface. The power supply port is connected to the input end of the LC module. The output end of the LC module is connected to the atomization piece interface and the first end of the switching module. The second end of the switching module is connected to the output end of the control circuit through the PWM input module. The third end of the switching module is connected to the input end of the feedback module. The output end of the feedback module is connected to the feedback end of the control circuit.

[0006] Further, the LC module comprises a capacitor C7, a capacitor C8, a capacitor C9, an inductor L2, an inductor L3 and an inductor L4, one end of the capacitor C7 is grounded, the other end of the capacitor C7 is connected with the power supply port and one end of the inductor L2, the other end of the inductor L2 is connected with one end of the inductor L3, the other end of the inductor L3 is connected with one end of the capacitor C8 and the first end of the switch module, the other end of the capacitor C8 is connected with one end of the inductor L4 and one end of the capacitor C9, the other end of the capacitor C9 is connected with the third end of the switch module and the second port of the atomizing piece interface, and the other end of the inductor L4 is connected with the first port of the atomizing piece interface.

[0007] Further, the switch module comprises a switch tube Q2, a resistor R8 and a resistor R7, the first end of the switch tube Q2 is connected with the other end of the inductor L3 and one end of the capacitor C8, the second end of the switch tube Q2 is connected with one end of the resistor R7 and the PWM input module, the third end of the switch tube Q2 is connected with the LC module, one end of the resistor R8 and the feedback module, and the other end of the resistor R8 is connected with the other end of the resistor R7.

[0008] Further, the PWM input module comprises a PWM input port and a resistor R6, and the PWM input port is connected with the second end of the switch tube Q2 and one end of the resistor R7 through the resistor R6.

[0009] Further, the switch tube Q2 is a transistor, the first end of the switch tube Q2 is a source, the second end of the switch tube Q2 is a drain, and the third end of the switch tube Q2 is a source.

[0010] Further, the feedback module comprises a resistor R9, a capacitor C10, a capacitor C11 and a feedback port, one end of the capacitor C11 is grounded, the other end of the capacitor C11 is connected with one end of the resistor R9 and the feedback port, the feedback port is connected with the feedback end of the control circuit, the other end of the resistor R9 is connected with one end of the capacitor C10 and one end of the resistor R8, and the other end of the capacitor C10 is connected with the other end of the resistor R8.

[0011] Further, the power supply port outputs 24V direct current.

[0012] Further, the control circuit comprises a CPU of a TM56M1522 series.

[0013] In another aspect, the utility model also provides an atomizer, comprising the atomizing piece drive circuit as described above.

[0014] The utility model embodiment can control multiple atomization pieces simultaneously through the introduction of multiple drive units and the time division multiplexing of the control circuit, and the method can drive each atomization piece according to its actual resonance frequency, avoids the performance fluctuation caused by single frequency operation, and solves the problems of atomization efficiency and stability. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

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

[0017] Figure 2 It is the structural block diagram of the utility model drive unit;

[0018] Figure 3 It is the circuit diagram of the utility model drive unit;

[0019] Figure 4 It is the frequency tracking principle flow chart of the utility model.

[0020] Reference signs:

[0021] 100, control circuit; 200, drive unit; 210, power supply port; 220, PWM input module; 230, LC module; 240, switch module; 250, feedback module; 260, atomization piece interface. DETAILED DESCRIPTION

[0022] The utility model will be further described in detail below in combination with the drawings.

[0023] The specific embodiment is only the explanation of the utility model, and it is not the limitation of the utility model, and the person skilled in the art can make the modification without creative contribution according to the need after reading the present specification, but as long as it is in the right claim range of the utility model, it is protected by the patent law.

[0024] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment, and obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. The components of the utility model embodiment described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the application.

[0026] With reference to Figure 1 The utility model provides a kind of atomization piece driving circuit, including control circuit and multiple parallel driving units, the output of the control circuit is connected respectively the input of multiple driving units, the signal output of multiple driving units is connected the feedback end of the control circuit, the control circuit controls multiple driving units work by time division multiplexing, and receives the feedback signal of multiple driving units, and the driving unit is used to drive atomization piece.

[0027] The utility model embodiment can control multiple atomization pieces simultaneously by introducing multiple driving units and time division multiplexing of control circuit, which enables each atomization piece to be accurately driven according to its actual resonant frequency, while avoiding performance fluctuations caused by single frequency operation, solving the problems of atomization efficiency and stability.

[0028] It should be noted that time division multiplexing means allocating resources or signals according to time periods, ensuring that each individual control circuit or device can use shared resources without conflict or interference in different time periods. In this embodiment, time division multiplexing means that the control circuit controls multiple driving units by time rotation, so that multiple atomization pieces can be accurately driven, and each atomization piece can be independently driven according to its actual resonant frequency. Those skilled in the art can understand how to apply this technology to atomization piece driving circuit by referring to the utility model embodiment, and solve the problem of single frequency control in prior art that cannot drive multiple atomization pieces simultaneously. Although time division multiplexing technology has been applied, there is no similar solution for precise control and cooperative work of multiple atomization pieces. Therefore, the application of this technology fills the gap in the prior art and improves the efficiency and stability of the atomizer.

[0029] With reference to Figures 2-3The utility model provides another atomization piece drive circuit, specifically, the drive unit includes power supply port, PWM input module, LC module, switch module, feedback module and atomization piece interface, the input end of LC module is connected with power supply port, the output end of LC module is connected with atomization piece interface and the first end of switch module, the second end of switch module is connected with the output end of control circuit through PWM input module, the third end of switch module is connected with the input end of feedback module, the output end of feedback module is connected with the feedback end of control circuit.

[0030] The utility model embodiment through power supply port, PWM input module, LC module reasonable layout of module, make every drive unit can stable work, and through feedback module and control circuit's feedback end link to each other, has guaranteed control circuit's closed loop control, has promoted atomization efficiency and stability.

[0031] It needs to be explained that the following specific circuit structure is exemplified with two atomization pieces.

[0032] In an embodiment, the LC module includes a capacitor C7, a capacitor C8, a capacitor C9, an inductor L2, an inductor L3, and an inductor L4. One end of the capacitor C7 is grounded. The other end of the capacitor C7 is connected to the power supply port and one end of the inductor L2. The other end of the inductor L2 is connected to one end of the inductor L3. The other end of the inductor L3 is connected to one end of the capacitor C8 and the first end of the switch module. The other end of the capacitor C8 is connected to one end of the inductor L4 and one end of the capacitor C9. The other end of the capacitor C9 is connected to the third end of the switch module and the second port of the atomization piece interface. The other end of the inductor L4 is connected to the first port of the atomization piece interface.

[0033] By reasonably configuring the capacitors and inductors in the LC module, the energy transmission and filtering effect of the circuit are optimized, and the stability of the drive circuit is improved. The capacitors C7, C8, and C9 and the inductors L2, L3, and L4 effectively balance the impedance in the circuit, ensuring accurate control of voltage and current, avoiding high-frequency noise and interference, enabling the atomization piece to achieve more stable driving when working, improving atomization efficiency and long-term stability of the device, thereby prolonging the service life of the product.

[0034] In an embodiment, the switch module includes a switch tube Q2, a resistor R8, and a resistor R7. The first end of the switch tube Q2 is connected to the other end of the inductor L3 and one end of the capacitor C8. The second end of the switch tube Q2 is connected to one end of R7 and the PWM input module. The third end of the switch tube Q2 is connected to the LC module, one end of the resistor R8, and the feedback module. The other end of the resistor R8 is connected to the other end of the resistor R7.

[0035] The embodiment realizes accurate control of current and signal by reasonably configuring the switch tube Q2 and the resistors R7 and R8 in the switch module: the multi-terminal connection mode of the switch tube Q2 enables the circuit to quickly switch and effectively regulate the energy flow when working, thereby improving the response speed and accuracy of driving, the resistors R7 and R8 help stabilize the current and voltage, reduce noise interference in the circuit, and ensure stable driving of the atomizing sheet, the embodiment optimizes the power control of the control circuit, enhances the stability and atomization effect of the overall circuit, and improves the working efficiency and reliability of the equipment.

[0036] In an embodiment, the PWM input module includes a PWM input port and a resistor R6, and the PWM input port connects the second end of the switch tube Q2 and one end of the resistor R7 through the resistor R6.

[0037] The embodiment optimizes the transmission and adjustment of the signal by setting the PWM input port and the resistor R6 in the PWM input module: the introduction of the resistor R6 effectively limits the current size, avoids excessive current from impacting the switch tube Q2, thereby improving the protection and stability of the circuit, and the connection of the PWM input port and the resistor R6 ensures that the PWM signal from the control circuit can be accurately transmitted to the switch tube Q2, ensuring the stability and response speed of the driving signal, the embodiment improves the sensitivity and reliability of the circuit, and further enhances the accurate control and atomization effect of the atomizing sheet.

[0038] In an embodiment, the switch tube Q2 is a transistor, the first end of the switch tube Q2 is a source, the second end of the switch tube Q2 is a drain, and the third end of the switch tube Q2 is a source.

[0039] In the embodiment, the switch tube Q2 uses a transistor as a switching element, has higher switching speed and stronger current carrying capacity, can realize accurate current control and switching, and ensures efficient operation of the circuit.

[0040] In an embodiment, the feedback module includes a resistor R9, a capacitor C10, a capacitor C11, and a feedback port, one end of the capacitor C11 is grounded, the other end connects one end of the resistor R9 and the feedback port, the feedback port connects a feedback end of the control circuit, the other end of the resistor R9 connects one end of the capacitor C10 and one end of the resistor R8, and the other end of the capacitor C10 connects the other end of the resistor R8.

[0041] The embodiment forms an effective closed-loop feedback control circuit by designing the connection of the resistance R9, the capacitors C10 and C11 in the feedback module and the feedback port: the cooperation of the capacitor C11 and the resistance R9 helps to filter out noise signals and improve the stability of the feedback signal, and the synergistic effect of the capacitor C10 and the resistance R8 effectively adjusts the amplitude and phase of the feedback signal, ensuring that the circuit can accurately respond to the input signal.

[0042] In the embodiment, the power supply port outputs 24V direct current, aiming to provide stable and sufficient power support for the entire driving circuit, however, the power supply voltage in the embodiment is not limited to 24V, and in fact other voltage grades such as 12V, 36V or 48V can also be selected according to actual needs, and different voltage values can be adjusted according to the power demand of circuit design, load requirements and specific application scenarios of the atomizer.

[0043] In one embodiment, the CPU with model TM56M1522 series is responsible for the operation of the entire control circuit, generates PWM signals to control the operation of multiple driving units, and uses time division multiplexing technology to ensure accurate driving of multiple atomizing pieces, avoid frequency interference, and the CPU also receives signals from the feedback module in real time, monitors the working state of the atomizing piece, and adjusts the output PWM signal according to the feedback signal to ensure that the control circuit always operates stably, in addition, TM56M1522 has certain adaptive adjustment capability, can adjust the control strategy according to different load conditions, provides necessary protection function, thereby guaranteeing the safety and high efficiency of the circuit and the equipment.

[0044] Referring to Figure 4 The utility model embodiment further provides a frequency tracking principle flow chart of atomizing piece, including:

[0045] Step S1, initialization: first, set PWM parameters and IR CF (FIRC frequency tuning) parameters, set the PWM frequency to 2 MHz, and the IR CF frequency tuning algorithm (IR CFT) is set to 0.

[0046] Through step S1, those skilled in the art can understand that the initialization process ensures that the control circuit has a fixed reference frequency and parameters when starting to work, so that each atomizing piece can start to work in a unified control environment, and the control problem caused by inconsistent frequency is avoided.

[0047] Step S2, read current: read the ADC current (i.e. the current of the atomizing piece), and judge whether the current reaches the target value.

[0048] The skilled person in the art can understand through step S2 that the purpose of reading the current and making a judgment is to monitor the working state of each atomizing piece in real time, and if the current does not reach the preset target, the control circuit can further adjust the PWM frequency to ensure the working effect of each atomizing piece.

[0049] Step S3, the current reaches the target value: if the current has reached the target value, scanning is performed, the current IRCF and IRCFT values are recorded, and the current PWM value is adjusted.

[0050] The skilled person in the art can understand through step S3 that when the current reaches the target value, the control circuit adjusts the control signal (PWM) to keep the current in a stable state, which is crucial for the accurate control of a single atomizing piece. In the application of multiple atomizing pieces, this means that the PWM can be adjusted independently for each atomizing piece to avoid mutual interference and ensure that each atomizing piece works in its best working state.

[0051] Step S4, the current does not reach the target value: if the current does not reach the target value, the frequency scanning continues. Determine whether the current frequency is 2.3 MHz, and scan all frequency points to record the new current value.

[0052] The skilled person in the art can understand through step S4 that when the current does not reach the target, the control circuit adjusts the current output by scanning different frequencies until the current stabilizes. For the cooperative control of multiple atomizing pieces, step S4 ensures that each atomizing piece can dynamically adjust the working frequency according to the actual load, thereby avoiding interference or instability caused by frequency mismatch.

[0053] Step S5, the current exceeds the maximum value: if the current is greater than the maximum set current value, set the current value to the maximum value and stop working, and reset the PWM frequency to 0.1 kHz.

[0054] The skilled person in the art can understand through step S5 that step S5 prevents damage to the device by limiting the current, while reducing power consumption by reducing the PWM frequency, ensuring the safe and stable operation of the control circuit. In a multiple atomizing piece control circuit, step S5 can prevent any atomizing piece from affecting the performance of the entire control circuit due to overloading, ensuring the stability of multiple pieces working together.

[0055] Step S6, adjust the PWM frequency: after the current is adjusted, further frequency adjustment and control are performed to ensure stable operation of the atomizing piece.

[0056] The skilled in the art can understand through step S6 that by dynamically adjusting the PWM frequency, the working efficiency of the control circuit can be further improved, and it is ensured that each atomization piece can run at the optimal working frequency. This step is particularly important in the control of multiple atomization pieces, because the working state of each atomization piece may be different, and adjusting the PWM frequency helps to maintain the coordination and efficiency of the entire control circuit.

[0057] It should be noted that by looking at the frequency tracking principle flowchart of the atomization piece in this embodiment, the skilled in the art can understand how to apply the frequency tracking principle to the precise control and cooperative work of multiple atomization pieces through these steps. Although there are similar frequency adjustment methods in other fields in the prior art, the problem of how to precisely control the driving and stability of each atomization piece in the environment where multiple atomization pieces work simultaneously has not been explicitly proposed.

[0058] The above is only to illustrate the technical solutions of the present application, not to limit it, and other modifications or equivalent replacements of the technical solutions of the present application made by the ordinary skilled in the art shall be covered in the scope of the claims of the present application, as long as they do not deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. An atomizing plate driving circuit, characterized in that, It includes a control circuit and multiple drive units connected in parallel. The output terminal of the control circuit is connected to the input terminals of the multiple drive units respectively, and the signal output terminals of the multiple drive units are connected to the feedback terminal of the control circuit. The control circuit controls the operation of the multiple drive units through time-division multiplexing and receives the feedback signals of the multiple drive units. The drive units are used to drive the atomizing plate.

2. The atomizing plate driving circuit according to claim 1, characterized in that, The drive unit includes a power supply port, a PWM input module, an LC module, a switch module, a feedback module, and an atomizing plate interface. The power supply port is connected to the input terminal of the LC module. The output terminal of the LC module is connected to the atomizing plate interface and the first terminal of the switch module. The second terminal of the switch module is connected to the output terminal of the control circuit through the PWM input module. The third terminal of the switch module is connected to the input terminal of the feedback module. The output terminal of the feedback module is connected to the feedback terminal of the control circuit.

3. The atomizing plate driving circuit according to claim 2, characterized in that, The LC module includes capacitors C7, C8, and C9, inductors L2, L3, and L4. One end of capacitor C7 is grounded, and the other end of capacitor C7 is connected to the power supply port and one end of inductor L2. The other end of inductor L2 is connected to one end of inductor L3. The other end of inductor L3 is connected to one end of capacitor C8 and the first terminal of the switch module. The other end of capacitor C8 is connected to one end of inductor L4 and one end of capacitor C9. The other end of capacitor C9 is connected to the third terminal of the switch module and the second port of the atomizing plate interface. The other end of inductor L4 is connected to the first port of the atomizing plate interface.

4. The atomizing plate driving circuit according to claim 3, characterized in that, The switching module includes a switching transistor Q2, a resistor R8, and a resistor R7. The first end of the switching transistor Q2 is connected to the other end of the inductor L3 and one end of the capacitor C8. The second end of the switching transistor Q2 is connected to one end of R7 and the PWM input module. The third end of the switching transistor Q2 is connected to the LC module, one end of the resistor R8, and the feedback module. The other end of the resistor R8 is connected to the other end of the resistor R7.

5. The atomizing plate driving circuit according to claim 4, characterized in that, The PWM input module includes a PWM input port and a resistor R6. The PWM input port is connected to the second terminal of the switching transistor Q2 and one terminal of the resistor R7 through the resistor R6.

6. The atomizing plate driving circuit according to claim 4, characterized in that, The switching transistor Q2 is a transistor, with its first terminal being the source, its second terminal being the drain, and its third terminal being the source.

7. The atomizing plate driving circuit according to claim 4, characterized in that, The feedback module includes a resistor R9, a capacitor C10, a capacitor C11, and a feedback port. One end of the capacitor C11 is grounded, and the other end is connected to one end of the resistor R9 and the feedback port. The feedback port is connected to the feedback terminal of the control circuit. The other end of the resistor R9 is connected to one end of the capacitor C10 and one end of the resistor R8. The other end of the capacitor C10 is connected to the other end of the resistor R8.

8. The atomizing plate driving circuit according to claim 2, characterized in that, The power supply port outputs 24V DC power.

9. The atomizing plate driving circuit according to claim 1, characterized in that, The control circuit includes a CPU of the TM56M1522 series.

10. An atomizer, characterized in that, Includes an atomizing plate driving circuit as described in any one of claims 1-9.

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