Atomization driving circuit

Abstract

The utility model discloses an atomization driving circuit which is characterized in that the atomization driving circuit is mainly composed of a power supply end, an atomization sheet W, a control chip U, a three-pin inductor L, a capacitor C4 and an MOS tube Q1, the positive electrode of the power supply end is connected with the input pin of the three-pin inductor L, the common end of the three-pin inductor L is connected with the drain electrode of the MOS tube Q1, and the negative electrode of the atomization sheet W is connected with the positive electrode of the control chip U; the output end of the three-pin inductor L is grounded after passing through a capacitor C4 and an atomization sheet W. The source electrode of the MOS tube Q1 is grounded, and the grid electrode of the MOS tube Q1 is connected with the output pin of the control chip U. The circuit is mainly composed of the power supply end, the atomization sheet W, the control chip, the three-pin inductor L, the capacitor C4 and the MOS tube, and the structure is simple. Compared with a traditional atomization driving circuit, unnecessary complex elements are reduced, and the design and manufacturing cost of the circuit is reduced. Meanwhile, the simple structure is also convenient for production and assembly, the production efficiency is improved, and the labor cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of aromatherapy products or humidifier products, specifically to an atomization drive circuit. Background Technology

[0002] In the current market for car air fresheners and humidifiers, the atomizing circuit, as a core component, directly impacts the user experience and market competitiveness. Some existing atomizing drive circuits suffer from excessive structural complexity. For example, some traditional three-point self-excited circuits, while producing a waveform close to a sine wave and smoothing the vibration of the atomizing plate, require numerous and large components. Too many components not only increase assembly difficulty and cost but also occupy more internal space, hindering miniaturization and lightweight design. Furthermore, from an energy consumption perspective, many atomizing drive circuits perform poorly. For instance, traditional self-excited solutions have low atomization efficiency, consuming significant electrical energy in the process of converting liquid into mist, leading to rapid depletion of the vehicle's power supply. This not only increases the burden on the vehicle battery but may also affect the normal operation of other electrical devices in the vehicle. Moreover, the power transistors in these circuits generate significant heat during operation, often requiring additional heat sinks to ensure proper functioning, and even necessitating consideration of the fan and heat sink placement, further increasing energy consumption and product design complexity.

[0003] Therefore, the atomization circuits of existing car air fresheners or humidifiers have many defects in terms of structure, energy consumption, and design rationality, and there is an urgent need for a more optimized atomization drive circuit design to improve these problems. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing atomization circuit designs in aromatherapy or humidifiers and to provide an atomization drive circuit.

[0005] The purpose of this utility model is achieved through the following solution: an atomizing driving circuit, mainly composed of a power supply terminal, an atomizing sheet W, a control chip U, a three-legged inductor L, a capacitor C4, and a MOSFET Q1. The positive terminal of the power supply terminal is connected to the input pin of the three-legged inductor L, the common terminal of the three-legged inductor L is connected to the drain of the MOSFET Q1, the output terminal of the three-legged inductor L is grounded through the capacitor C4 and the atomizing sheet W, the source of the MOSFET Q1 is grounded, and the gate of the MOSFET Q1 is connected to the output pin of the control chip U.

[0006] Furthermore, the value of capacitor C4 is 0.5 to 3 μF, with the optimal value being 1 μF.

[0007] A Zener diode D1 is connected in series between the positive terminal of the power supply and the input pin of the three-legged inductor L.

[0008] The gate of the MOS transistor Q1 is also grounded via resistor R7.

[0009] The resistance of resistor R7 is 10KΩ.

[0010] The three-legged inductor L is a three-legged boost surface-mount inductor, and the ratio of the inductance of its two inductor coils ranges from 1:20 to 1:32.

[0011] As a preferred embodiment, the ratio of the inductances of the two inductor coils of the three-legged inductor L is 1:20.

[0012] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0013] (1) The circuit of this utility model mainly consists of a power supply terminal, an atomizing plate W, a control chip, a three-legged inductor L, a capacitor C4, and a MOSFET. Its circuit structure is simple. Compared with the traditional atomizing drive circuit, it reduces unnecessary complex components and lowers the design and manufacturing costs of the circuit. At the same time, the simple structure also facilitates production and assembly, improves production efficiency, and reduces labor costs.

[0014] (2) In this invention, a Zener diode D1 is connected in series between the positive terminal of the power supply and the input pin of the three-legged inductor L, which can effectively stabilize the voltage input to the circuit. The Zener diode D1 can stabilize the power supply voltage within a suitable range, avoiding damage to other components in the circuit caused by voltage fluctuations, and ensuring the stable operation of the atomization drive circuit. Especially for voltage-sensitive atomizing sheets and control chips, a stable power supply can extend their service life and improve the reliability of the entire circuit.

[0015] (3) By reasonably setting the value of capacitor C4 within the range of 0.5 to 3 μF, this utility model can achieve the optimal resonance characteristics of the circuit. A suitable capacitor value can be combined with a three-legged inductor to form a stable oscillation circuit, providing a suitable driving signal for the atomizing plate and improving atomization efficiency.

[0016] (4) The gate of the MOS transistor Q1 of this invention is grounded through resistor R7, and the resistance value of resistor R7 is preferably 10KΩ. This resistor acts as a pull-down resistor. When the control chip outputs an abnormal signal or no signal, it can pull down the gate potential of the MOS transistor Q1 to ensure that the MOS transistor Q1 is in the off state, avoid the MOS transistor Q1 from being falsely triggered, and improve the safety and stability of the circuit. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the circuit structure of this utility model. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0019] Example

[0020] like Figure 1 As shown, the atomizing drive circuit in this embodiment mainly consists of electronic components such as a power supply terminal, an atomizing plate W, a control chip U, a three-pin inductor L, a capacitor C4, and a MOSFET Q1. The three-pin inductor L is preferably implemented using a three-pin surface-mount boost inductor, which consists of two inductors and has one input terminal, one output terminal, and one common terminal. The boost ratio of the three-pin inductor L is between 1:20 and 1:32, meaning that each inductor has a corresponding inductance value, and the magnitude of the inductance value of each inductor is the boost ratio of the three-pin inductor L. Therefore, the ratio of the inductance of the input inductor to the inductance of the output inductor of the three-pin inductor L is between 1:20 and 1:32.

[0021] When connected, the positive terminal of the power supply (i.e. the output terminal of the power supply) is connected to the input pin of the three-legged inductor L, the common terminal of the three-legged inductor L is connected to the drain of the MOSFET Q1, and the output terminal of the three-legged inductor L is grounded through capacitor C4 and atomizing plate W.

[0022] The source of the MOSFET Q1 is grounded, and its gate is connected to the signal output pin of the control chip U. The control chip U is preferably constructed using a microcontroller or similar chip or electronic component capable of outputting pulse signals, such as the SJ303 chip. In this embodiment, the signal output pin of the control chip U refers to the output pin capable of outputting a PWM pulse signal, with a duty cycle of 30% to 50%. Since different models of microcontrollers or chips have different packaging methods or layouts, their pin positions and numbers are not fixed; users can connect them according to the actual situation.

[0023] The control chip U also has a voltage input terminal and an EN enable terminal. The EN enable terminal is grounded via a mechanical push switch K1. That is, when the mechanical push switch K1 is closed, the enable terminal of the control chip U is grounded, making the EN enable terminal low. In this embodiment, the enable terminal of the control chip U is active low. The mechanical push switch K1 can be installed on the casing of the relevant atomizing product as a start or control switch. That is, only after the mechanical push switch K1 is turned on can the control chip U enter the working mode and perform subsequent operations or control.

[0024] To ensure stable output voltage at the power supply terminal, a Zener diode D1 is connected in series between the positive terminal of the power supply and the input pin of the three-pin inductor L. This Zener diode D1 is a 1N4007 type. Meanwhile, the capacitance C4 ranges from 0.5 to 3 μF, with an optimal value of 1 μF. Based on the LC oscillation circuit composed of the three-pin inductor L and capacitor C4, to ensure optimal operation, in this embodiment, the value of the three-pin inductor L is 30 μH + 300 μH or 35 μH + 800 μH, and the value of capacitor C4 is 1 μF. It should be noted that a value of 30 μH + 300 μH for the three-pin inductor L means that its input inductance is 30 μH and its output inductance is 300 μH; a value of 35 μH + 800 μH for the three-pin inductor L means that its input inductance is 35 μH and its output inductance is 800 μH.

[0025] The power supply can be a Type-C plug-in interface or a rechargeable battery. When a rechargeable battery is used in this embodiment, corresponding charging protection circuits are also required. These are all very common existing technologies and will not be described in detail.

[0026] To prevent circuit damage caused by sudden power surges, this embodiment also includes a grounded capacitor C1 at the N-terminal (output terminal) of the Zener diode D1, with a value ranging from 1 to 2 μF. To ensure the overall circuit operation, its optimal value is 1 μF, meaning the ratio of capacitor C4 to C1 is 1:1.

[0027] To ensure the normal operation of MOSFET Q1, an N-type MOSFET, such as the CJ2310, is preferred. In this embodiment, a resistor R7 can be added to the gate of MOSFET Q1, meaning the gate of MOSFET Q1 is grounded via resistor R7. The resistance of resistor R7 is set to 10KΩ. This value effectively limits the gate current while ensuring normal transmission of the control signal, protecting the control chip and MOSFET Q1 from excessive current surges.

[0028] The working principle of this embodiment is as follows: When MOSFET Q1 is turned on, the power supply charges the three-legged inductor L through the Zener diode D1 and MOSFET Q1, storing energy in the inductor; when MOSFET Q1 is turned off, the current in the inductor cannot change abruptly, generating a reverse electromotive force, which forms a discharge circuit through capacitor C4 and atomizing plate W. The LC oscillation circuit composed of the three-legged inductor L and capacitor C4 will oscillate at a specific frequency, which depends on the parameters of inductor L and capacitor C4.

[0029] Since the atomizing plate W is a component that operates using the piezoelectric effect, when an oscillation signal generated by the LC oscillation circuit is applied to the atomizing plate W, the atomizing plate W will generate high-frequency vibration, atomizing the liquid into micro-particles.

[0030] Small particles are used to achieve the atomization function.

[0031] As described above, this utility model can be implemented quite well.

Claims

1. An atomizing driving circuit, characterized in that, It mainly consists of a power supply terminal, an atomizing plate W, a control chip U, a three-legged inductor L, a capacitor C4, and a MOSFET Q1. The positive terminal of the power supply terminal is connected to the input pin of the three-legged inductor L, the common terminal of the three-legged inductor L is connected to the drain of the MOSFET Q1, the output terminal of the three-legged inductor L is grounded through the capacitor C4 and the atomizing plate W, the source of the MOSFET Q1 is grounded, and the gate of the MOSFET Q1 is connected to the signal output pin of the control chip U.

2. The atomizing drive circuit according to claim 1, characterized in that, The value of capacitor C4 is 0.5 to 3 μF.

3. The atomizing drive circuit according to claim 1, characterized in that, A Zener diode D1 is connected in series between the positive terminal of the power supply and the input pin of the three-legged inductor L.

4. The atomizing drive circuit according to claim 2, characterized in that, The gate of the MOS transistor Q1 is also grounded via resistor R7.

5. An atomizing drive circuit according to any one of claims 2 to 4, characterized in that, The value of capacitor C4 is 1μF.

6. The atomizing drive circuit according to claim 4, characterized in that, The resistance of resistor R7 is 10KΩ.

7. The atomizing drive circuit according to claim 5, characterized in that, The three-legged inductor L is a three-legged boost surface-mount inductor, and the ratio of the inductance of its two inductor coils ranges from 1:20 to 1:

32.

8. The atomizing drive circuit according to claim 7, characterized in that, The ratio of the inductance of the two inductor coils of the three-legged inductor L is 1:20.

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